SUPRACONDYLAR FRACTURES IN CHILDREN: A SYSTEMATIC REVIEW OF TREATMENT OPTIONS.

OBJECTIVE: To compare the outcomes of surgical stabilization of pediatric supracondylar humeral fractures with the use of crossed Kirschner wires versus divergent lateral pinning wires. METHODS: This is a systematic review with meta-analysis carried out by searching the MEDLINE/PubMed, Science Direct and Scielo databases. In these, the search for journals was carried out between January and August 2023, where 695 studies were found. To assess the quality of the studies, the Jadad and the MINORS scales were used.. The selection and reading of relevant articles were carried out by the researchers and 11 studies met the selection criteria. RESULTS: From the 11 selected studies, 963 patients who met the criteria for the surgical treatment of these fractures were grouped. After the statistical analysis, we found that the ulnar nerve injury had a higher incidence when the crossed-K wire technique was used; and the lateral fixation is safer for the ulnar nerve. CONCLUSION: Both fixation techniques determine good functional results. However, fixation with lateral Kirschner wires proves to be safer considering the risk of iatrogenic injury to the ulnar nerve. Crossed-K wire fixation is more effective in terms of stability and maintenance of fracture reduction. Level of Evidence II, Systematic Review of Level II or Level I Studies with discrepant results.

Objetivo: Comparar os desfechos da estabilização cirúrgica das fraturas supracondilianas do úmero pediátricas com o uso de fios de Kirschner cruzados versus fios laterais divergentes. Métodos: Trata-se de uma Revisão Sistemática com metanálise realizada pela pesquisa nas bases de dados MEDLINE/PubMed, Science Direct e Scielo. Nessas, a busca dos periódicos foi realizada entre janeiro e agosto de 2023, e foram encontrados 695 estudos. Para a avaliação da sua qualidade, foram utilizadas a escala de Jadad e a escala MINORS. A seleção e a leitura dos artigos pertinentes foram realizadas pelos pesquisadores e 11 estudos preencheram os critérios de escolha. Resultados: Dos estudos selecionados, agrupamos 963 pacientes que preenchiam os critérios para o tratamento cirúrgico das fraturas. Após a análise estatística, observamos que maior incidência de lesão do nervo ulnar quando foi utilizada a técnica de pinagem cruzada; e a fixação lateral demonstrou ser mais segura para tal. Conclusão: Ambas as técnicas de fixação determinam bons resultados funcionais. Entretanto, a fixação com fios de Kirschner laterais demonstra ser mais segura, considerando o risco de lesão iatrogênica do nervo ulnar. A fixação com fios cruzados é mais eficaz, levando em conta a estabilidade e a manutenção da redução das fraturas. Nível de evidência II, Revisão sistemática de Estudos de Nível II ou Nível I com resultados discrepantes.

Stoppa Intrapelvic Approach Provides Good Functional Clinical Outcomes: Prospective Study with a Minimum Follow-up of One Year and Comparison with the Literature.

Objective To describe the clinical and radiographic outcomes of a cohort of patients with acetabular fractures treated with the modified Stoppa approach. Methods We conducted a prospective analysis of adult patients with acetabular fractures treated using the modified Stoppa approach from June 2020 to June 2021, with a minimum follow-up period of 12 months. The analysis included demographic, epidemiological, and perioperative data, as well as postoperative radiographic and functional outcomes. Results The study included 15 cases, with 14 men (93.3%) and 1 woman (6.67%). A postoperative tomographic evaluation revealed an anatomical reduction in 50%, an imperfect reduction in 13.6%, and a poor reduction in 36.4% of the subjects. Regarding the functional scores, the Harris Hip Score ranged from 56 to 100, with a mean value of 92.5. The Majeed Pelvic Score classified the functional outcome as excellent in 36.5%, good in 40.6%, moderate in 18.7%, and poor in 4.2% of the cases. Conclusion The present case series study demonstrated positive statistical relevance between reduction quality and functional outcomes and between the time until surgery and the reduction quality. The functional outcomes at a one-year of follow-up demonstrate that this approach can be an excellent alternative for anterior acetabulum fractures.

Anatomical study of the safety corridor for bridge plating positioned on the lateral border of the humerus.

PURPOSE: This study shows the danger zone and the safety corridor in the lateral approach with bridge plating by measuring the distance between the lateral side of the plate positioned on the lateral aspect of the humerus and the radial nerve after it pierces the lateral intermuscular septum, in the different forearm positions. METHODS: Forty arms of 20 human cadavers were used, the radial nerve was identified and marked on the lateral surface the radial nerve at the exit of the lateral intermuscular septum and anteriorisation of the nerve in relation to the humeral shaft and the lateral epicondyle was also marked. The distances were measured with a digital caliper. A submuscular extraperiosteal corridor was created, proximally between the biceps brachialis and deltoid muscle and distally between the triceps and brachioradialis muscle, followed by the positioning of the low contact large fragments contoured plate with 14 combined holes (fixed and cortical angle), inserted from distal to proximal. Measurements were performed in four positions (elbow flexion with forearm pronation, elbow flexion with forearm supination, elbow extension with forearm pronation and elbow extension with forearm supination). RESULTS: Significant statistical differences occurred with the different positions, and the elbow flexion with forearm supination was shown to be the position that provides the safest submuscular extraperiosteal corridor in a lateral approach of the humerus. CONCLUSION: The danger zone of radial nerve is an area that extends from 15 cm to 5 cm proximal to the lateral epicondyle and the safest way to create a submuscular and extraperiosteal corridor in the lateral region of the humerus is with the elbow in flexion and the forearm in supination.

Stoppa Intrapelvic Approach Provides Good Functional Clinical Outcomes: Prospective Study with a Minimum Follow-up of One Year and Comparison with the Literature / Acesso intrapélvico de Stoppa proporciona bons resultados clínicos funcionais: Estudo prospectivo com seguimento mínimo de um ano e comparação com a literatura

Abstract Objective To describe the clinical and radiographic outcomes of a cohort of patients with acetabular fractures treated with the modified Stoppa approach. Methods We conducted a prospective analysis of adult patients with acetabular fractures treated using the modified Stoppa approach from June 2020 to June 2021, with a minimum follow-up period of 12 months. The analysis included demographic, epidemiological, and perioperative data, as well as postoperative radiographic and functional outcomes. Results The study included 15 cases, with 14 men (93.3%) and 1 woman (6.67%). A postoperative tomographic evaluation revealed an anatomical reduction in 50%, an imperfect reduction in 13.6%, and a poor reduction in 36.4% of the subjects. Regarding the functional scores, the Harris Hip Score ranged from 56 to 100, with a mean value of 92.5. The Majeed Pelvic Score classified the functional outcome as excellent in 36.5%, good in 40.6%, moderate in 18.7%, and poor in 4.2% of the cases. Conclusion The present case series study demonstrated positive statistical relevance between reduction quality and functional outcomes and between the time until surgery and the reduction quality. The functional outcomes at a one-year of follow-up demonstrate that this approach can be an excellent alternative for anterior acetabulum fractures.

Resumo Objetivo Descrever os resultados clínicos e radiográficos de uma coorte de pacientes com fraturas de acetábulo tratados com o acesso de Stoppa modificado. Métodos Foi realizada uma análise prospectiva de pacientes adultos com fraturas de acetábulo tratados pela via de Stoppa modificada de junho de 2020 a junho de 2021 e com seguimento mínimo de 12 meses. Foram analisados dados demográficos, epidemiológicos e perioperatórios, e resultados radiográficos e funcionais pós-operatórios. Resultados Foram estudados 15 casos, sendo 14 homens (93,3%) e 1 mulher (6,67%). Na avaliação tomográfica pós-operatória, redução anatômica foi observada em 50% dos casos, imperfeita, em 13,6%, e ruim, em 36,4%. Nos escores funcionais, encontramos uma variação de 56 a 100, com média de 92,5 no Harris Hip Score. No Majeed Pelvic Score, o resultado funcional foi excelente em 36,5% dos casos, bom, em 40,6%, moderado, em 18,7%, e ruim, em 4,2%. Conclusão O estudo da série de casos demonstrou relevância estatística positiva entre a qualidade da redução e os desfechos funcionais, assim como entre o tempo até a cirurgia e a qualidade da redução. Os resultados funcionais no seguimento de um ano demonstram que o uso dessa via pode ser uma excelente alternativa para as fraturas anteriores do acetábulo.

Femoral neck osteosynthesis using interfragmentary compression or position screw in synthetic bones. What are the mechanical differences?

PURPOSE: We aim to compare interfragmentary compression with the position osteosynthesis in the fixation of different femoral neck fractures (FN) in synthetic bones subjected to vertical load. METHODS: Forty-two synthetic femurs were subjected to neck fractures and separated into 3 groups according to the Pauwels classification: Pauwels I had 6 units (PI); Pauwels II, 24 units, with and without comminution (PII); and Pauwels III, 12 units, with and without comminution (PIII). After, they were fixed with 2 different ways: three 7, 0 mm cannulated lag screws (CSs) versus three 6, 5 mm solid fully threaded screws (SSs). Screws positioning was oriented by the Pauwels classification: inverted triangle or crossed screws. All specimens were submitted to vertical loading until failure. RESULTS: The average force was 79.4 ± 22.6 Kgf. The greatest one was recorded in model 1 (135.6 Kgf), and the lowest in model 41 (39.6 Kgf). CSs and SSs had similar resistance until failure (p = 0.2). PI showed heightened resistance and PIII showed a worse response (p < 0,01). CSs had better performance in PIII (p = 0.048). Comminution and screws orientation caused no difference on peak force (p = 0.918 and p = 0.340, respectively). CONCLUSIONS: In synthetic bones, the resistance of a femoral neck fracture osteosynthesis using a 7, 0 mm cannulated lag screw or 6, 5 mm solid fully threaded screw are similar. There was no loss of efficiency with comminution in the femoral neck. Osteosynthesis resistance decreased with the verticalization of the fracture line and, in the more vertical ones, interfragmentary compression with CSs was more resistant than positional osteosynthesis with SSs.

Stability of Proximal Femoral Osteotomies in Pediatric Bone Models Fixed with Flexible Intramedullary Nails and Evaluated by the Finite Element Method.

Objective To evaluate the stability of osteotomies created in the subtrochanteric and trochanteric regions in a pediatric femur model fixed by flexible intramedullary rods. Method Tomographic sections were obtained from a pediatric femur model with two elastic titanium rods and converted to a three-dimensional model. This model created a mesh with tetrahedral elements according to the finite element method. Three virtual models were obtained, and osteotomies were performed in different regions: mediodiaphyseal, subtrochanteric, and trochanteric. A vertical load of 85N was applied to the top of the femoral head, obtaining the displacements, the maximum and minimum main stress, and the equivalent Von Mises stress on the implant. Results With the applied load, displacements were observed at the osteotomy site of 0.04 mm in the diaphyseal group, 0.5 mm in the subtrochanteric group, and 0.06 mm in the trochanteric group. The maximum stress in the diaphyseal, subtrochanteric, and trochanteric groups was 10.4 Pa, 7.52 Pa, and 26.4 Pa, respectively. That is around 40% higher in the trochanteric group in regards to the diaphyseal (control). The minimum stress of the bone was located in the inner cortical of the femur. The equivalent Von Mises stress on the implants occurred at osteotomy, with a maximum value of 27.6 Pa in the trochanteric group. Conclusion In both trochanteric and subtrochanteric osteotomies, fixation stability was often lower than in the diaphyseal model, suggesting that flexible intramedullary nails are not suitable implants for proximal femoral fixations.

Manejo de fractura de platillo tibial medial utilizando placas rim anteromedial y posteromedial / Management of Medial Tibial Plateau Fracture using Antero- and Posteromedial Rim Plates

INTRODUCCION En los últimos años, se ha descrito el uso de placas horizontales para la fijación de fracturas que comprometen el reborde articular de los platillos tibiales, lo que se conoce como placa rim. La mayoría de las publicaciones al respecto describen su uso en columnas posteriores y posterolaterales de los platillos tibiales, y a la fecha hay escasos reportes del uso de este tipo de placa en la columna anteromedial y ninguno para la posteromedial. El objetivo de este artículo es presentar dos casos clínicos de fracturas conminutas del platillo tibial medial mostrando su tratamiento con el uso de placas rim. CASOS CLINICOS El primer caso presentaba compromiso anteromedial y posteromedial, y el segundo, compromiso posteromedial. En ambos casos, se logró la reducción mediante un abordaje posteromedial y su fijación con placa bloqueada de 2,7 mm como placa rim. En cada caso, se detalló la estrategia de reducción y el manejo postoperatorio. RESULTADOS Ambos pacientes consiguieron la consolidación ósea entre las semanas 14 y 18 tras la osteosíntesis definitiva, sin presentar pérdidas de reducción. Ambos lograron rango de movilidad articular completo (0°­125°), y retornaron a sus trabajos a los 4 y 6 meses respectivamente. CONCLUSIONES Estas placas ofrecen una buena opción de tratamiento para fracturas articulares conminutas del borde del platillo tibial, tanto en la columna anteromedial como en la posteromedial. A pesar de la ausencia de grandes series de pacientes con uso de placas rim mediales, el resultado de los casos presentados aquí nos permite plantear su utilidad al momento de enfrentarnos a fracturas del reborde articular

INTRODUCTION In recent years, the use of horizontal plates has been described to achieve fixation of fractures that compromise the articular ridge of the tibial plateau; these plates are known as "rim plates." Most publications report their use in the posterior and posterolateral columns of the tibial plateau, and to date there are few reports of its use for the fixation of the anteromedial column and none for the posteromedial column. The objective of the present article is to report two clinical cases of comminuted fractures of the medial tibial plateau, showing their treatment with the use of medial rim plates. CLINICAL CASES The first case presented with an anteromedial and posteromedial tibial plateau fracture, and the second, a posteromedial fracture. In both cases, reduction was achieved through a posteromedial approach, and the fixation was performed with a 2.7-mm locked rim plate. The reduction strategy and postoperative management were detailed in each case. RESULTS Both patients achieved bone consolidation during the 14th and 18th weeks after the definitive osteosynthesis, without presenting loss of reduction. Both patients achieved full range of joint motion (0°­125°) and returned to work after four and six months respectively. CONCLUSION These plates offer a good treatment option for comminuted fractures of the rim of the tibial plateau, for both the anteromedial and posteromedial columns. Despite the absence of large series of patients with the use of medial rim plates, the results of the two cases herein presented enables us to propose it as a useful tool when dealing with fractures of the medial rim of the tibial plateau

INTRODUCTION In recent years, the use of horizontal plates has been described to achieve fixation of fractures that compromise the articular ridge of the tibial plateau; these plates are known as "rim plates." Most publications report their use in the posterior and posterolateral columns of the tibial plateau, and to date there are few reports of its use for the fixation of the anteromedial column and none for the posteromedial column. The objective of the present article is to report two clinical cases of comminuted fractures of the medial tibial plateau, showing their treatment with the use of medial rim plates. CLINICAL CASES The first case presented with an anteromedial and posteromedial tibial plateau fracture, and the second, a posteromedial fracture. In both cases, reduction was achieved through a posteromedial approach, and the fixation was performed with a 2.7-mm locked rim plate. The reduction strategy and postoperative management were detailed in each case. RESULTS Both patients achieved bone consolidation during the 14th and 18th weeks after the definitive osteosynthesis, without presenting loss of reduction. Both patients achieved full range of joint motion (0°­125°) and returned to work after four and six months respectively. CONCLUSION These plates offer a good treatment option for comminuted fractures of the rim of the tibial plateau, for both the anteromedial and posteromedial columns. Despite the absence of large series of patients with the use of medial rim plates, the results of the two cases herein presented enables us to propose it as a useful tool when dealing with fractures of the medial rim of the tibial plateau

Comparison of DN4 and DN4 Interview Tests in the Identification of Neuropathic Pain after Fracture Surgery.

Objective: This study aimed to compare results obtained with the DN4 (in-person interview) and DN4i (telephone interview) questionnaires in identifying neuropathic pain after fracture surgery. Methods: This study was methodological, using questionnaires administered in person (DN4) or via telephone (DN4i). The participants were at least 18 years old, underwent fracture surgery at a university hospital between January 2017 and July 2020, signed the Informed Consent Form (ICF), and could go to the Orthopedics and Traumatology Hospital. Pearson's correlation coefficient determined the agreement between the total score obtained during in-person and telephone interviews. The kappa coefficient evaluated the agreement between individual questionnaire items. Results: Of the 53 participants, 50 presented the same result for neuropathic pain screening in DN4 and DN4i, including 41 with a positive score for neuropathic pain and 12 with a negative score. The Pearson's correlation coefficient and kappa coefficient were r = 0.84. Conclusion: DN4 and DN4i presented a strong agreement between individual items of the questionnaires and the total scores obtained.

Predicting early complications in patients with spinal gunshot wounds: A multicenter study.

Introduction: There is a wide variation in the clinical presentation of spinal gunshot wounds ranging from isolated minor stable fractures to extremely severe injuries with catastrophic neurological damage. Research question: we aim to analyze the risk factors for early complications and impact of surgical treatment in patients with spinal gunshot wounds. Material and methods: This is a multicentre retrospective case-control study to compare patients with spinal gunshot wounds who had early complications with those who did not. The following matching criteria were used: sex (1:1), injury level (1:1) and age (±5 years). Univariate and multivariate analyses were performed using logistic regression. Results: Results: Among 387 patients, 36.9 % registered early complications, being persistent pain (n = 32; 15 %), sepsis/septic shock (n = 28; 13 %), pneumonia (n = 27; 13 %) and neurogenic bladder (n = 27; 12 %) the most frequently reported. After case-control matched analysis, we obtained 133 patients who suffered early complications (cases) and 133 patients who did not as control group, not differing significantly in sex (p = 1000), age (p = 0,535) and injury level (p = 1000), while the 35 % of complications group required surgical treatment versus 15 % of the non-complication group (p < 0.001). On multivariable analysis, significant predictors of complications were surgical treatment for spinal injury (OR = 3.50, 95 % CI = 1.68-7.30), dirty wound (3.32, 1.50-7.34), GCS ≤8 (3.56, 1.17-10.79), hemodynamic instability (2.29, 1.07-4.88), and multiple bullets (1.97, 1.05-3.67). Discussion and conclusion: Spinal gunshot wounds are associated with a high risk of early complications, especially when spinal surgery is required, and among patients with dirty wound, low level of consciousness, hemodynamic instability, and multiple bullets.

Randomized clinical trial comparing the efficacy and safety of ketamine and fentanyl for analgesia in pediatric orthopedic procedures / Ensaio clínico randomizado comparando a eficácia e a segurança da cetamina e do fentanil para analgesia em procedimentos ortopédicos pediátricos

ABSTRACT BACKGROUND AND OBJECTIVES: Bone fractures constitute a frequent cause of emergency care in the pediatric population. Opioid drugs are routinely used for analgesia during the hospitalization of children victims of trauma. Few studies have evaluated the importance of a multimodal approach to analgesia in this context. The aim of this study was to compare the analgesic effect and possible side effects of fentanyl compared to those of ketamine. METHODS: The study analyzed 50 children and adolescents, aged between 24 and 192 months, submitted to surgical treatment of upper limb fractures in a tertiary trauma care hospital. The participants were randomized into two groups: one that received Ketamine and the other Fentanyl. In the post-anesthetic recovery room (PARR), pain intensity and the occurrence of delirium were measured for a period of 30 minutes. The incidence of respiratory depression, nausea, vomiting and other side effects during the surgical procedure were assessed. RESULTS: The sample consisted mostly of male individuals (76.0%). The mean age of the participants was 90.1 months. The use of a low-flow oxygen cannula was necessary in 30.0% of the participants. The incidence of vomiting and laryngospasm was 2.0% among the participants, and 6.0% presented increased salivary secretion. The occurrence of pain, delirium and respiratory depression was not different between the two assessed groups, as well as the occurrence of nausea and laryngospasm. CONCLUSION: Ketamine is not an effective and safe option to opioids for analgesia in children undergoing surgical procedures to treat upper limb fractures.

RESUMO JUSTIFICATIVA E OBJETIVOS: As fraturas ósseas constituem causa frequente de atendimento de emergência na população pediátrica. Fármacos opioides são rotineiramente utilizados para analgesia durante a hospitalização de crianças vítimas de trauma. Poucos estudos avaliaram a importância de uma abordagem multimodal para analgesia nesse contexto. O objetivo deste estudo foi comparar o efeito analgésico e possíveis efeitos adversos do fentanil em relação aos da cetamina. MÉTODOS: Foram analisados 50 crianças e adolescentes, com idade entre 24 e 192 meses, submetidos ao tratamento cirúrgico das fraturas de membros superiores em um hospital terciário de atendimento ao trauma. Os participantes foram aleatorizados em dois grupos: um recebeu cetamina e outro fentanil. Na sala de recuperação pós-anestésica (SRPA), a intensidade da dor e a ocorrência de delirium foram mensuradas por um período de 30 minutos. A incidência de depressão respiratória, náuseas, vômitos e outros efeitos adversos durante o procedimento cirúrgico foram avaliados. RESULTADOS: A amostra foi composta, em sua maioria, por indivíduos do sexo masculino (76,0%). A média de idade dos participantes foi de 90,1 meses. O uso de cânula de oxigênio de baixo fluxo foi necessário em 30,0% dos participantes. A incidência de vômitos e laringoespasmo foi de 2,0% entre os participantes, sendo que 6,0% apresentaram aumento da secreção salivar. A ocorrência de dor, delirium e depressão respiratória não foi diferente entre os dois grupos avaliados, assim como a ocorrência de náuseas e laringoespasmo. CONCLUSAO: Acetamina não se mostrou uma opção eficaz e segura aos opioides para analgesia em crianças submetidas a procedimentos cirúrgicos para tratamento de fraturas de membros superiores.

Tibial Eminence Avulsion in a Tibial Plateau Fracture - Our Approach: A Clinical Case / Avulsão da eminência tibial em uma fratura do platô tibial - Nossa abordagem: Um caso clínico

Abstract A middle-aged female patient with a tibial plateau fracture combined with an avulsion of the tibial eminence was treated with a combination of medial plate fixation for the plateau and an arthroscopic aided nonabsorbable suture of the eminence. Our technique for tibial eminence avulsion fractures has no interference with tibial plateau osteosynthesis materials and has proven, once again, to have good results in the treatment of combined and complex injuries of the knee.

Resumo Uma paciente de meia-idade com fratura do platô tibial e avulsão da eminência tibial foi tratada com uma combinação de fixação do platô com placa medial e sutura da eminência com fio não absorvível auxiliada por artroscopia. Nossa técnica para fraturas com avulsão da eminência tibial não interfere nos materiais de osteossíntese do platô tibial e, mais uma vez, teve bons resultados no tratamento de lesões combinadas e complexas do joelho.

Stability of Proximal Femoral Osteotomies in Pediatric Bone Models Fixed with Flexible Intramedullary Nails and Evaluated by the Finite Element Method / Estabilidade de osteotomias proximais em modelos do fêmur pediátrico fixadas por hastes intramedulares flexíveis e avaliadas pelo método dos elementos finitos

Abstract Objective To evaluate the stability of osteotomies created in the subtrochanteric and trochanteric regions in a pediatric femur model fixed by flexible intramedullary rods. Methods Tomographic sections were obtained from a pediatric femur model with two elastic titanium rods and converted to a three-dimensional model. This model created a mesh with tetrahedral elements according to the finite element method. Three virtual models were obtained, and osteotomies were performed in different regions: mediodiaphyseal, subtrochanteric, and trochanteric. A vertical load of 85N was applied to the top of the femoral head, obtaining the displacements, the maximum and minimum main stress, and the equivalent Von Mises stress on the implant. Results With the applied load, displacements were observed at the osteotomy site of 0.04 mm in the diaphyseal group, 0.5 mm in the subtrochanteric group, and 0.06 mm in the trochanteric group. The maximum stress in the diaphyseal, subtrochanteric, and trochanteric groups was 10.4 Pa, 7.52 Pa, and 26.4 Pa, respectively. That is around 40% higher in the trochanteric group in regards to the diaphyseal (control). The minimum stress of the bone was located in the inner cortical of the femur. The equivalent Von Mises stress on the implants occurred at osteotomy, with a maximum value of 27.6 Pa in the trochanteric group. Conclusion In both trochanteric and subtrochanteric osteotomies, fixation stability was often lower than in the diaphyseal model, suggesting that flexible intramedullary nails are not suitable implants for proximal femoral fixations.

Resumo Objetivo Avaliar a estabilidade de osteotomias criadas nas regiões subtrocantérica e trocantérica em modelo de fêmur pediátrico, fixadas por hastes intramedulares flexíveis. Método A partir de um modelo de fêmur pediátrico com duas hastes elásticas de titânio, foram obtidos cortes tomográficos que foram convertidos para um modelo tridimensional. Neste modelo foi criado uma malha com elementos tetraédricos, de acordo com o método dos elementos finitos. Foram obtidos três modelos virtuais, e realizadas osteotomias em regiões diferentes: mediodiafisária, subtrocantérica e trocantérica. Foi aplicado um carregamento vertical de 85N no topo da cabeça do fêmur, obtidos os deslocamentos, a tensão máxima e mínima principal e tensão equivalente de Von Mises no implante. Resultados Com o carregamento aplicado foram observados deslocamentos no local da osteotomia de 0,04mm no grupo diafisário, 0,5mm no subtrocantérico e 0,06mm no trocantérico. A tensão máxima principal foi 10,4Pa, 7,52Pa e 26,4Pa nos grupos diafisário, subtrocantérico e trocantérico, respectivamente. Ou seja, a tensão máxima foi em torno de 40% maior no grupo trocantérico, em relação ao diafisário (controle). A face de tensão mínima do osso localizou-se na cortical interna do fêmur. A tensão equivalente de Von Mises nos implantes ocorreu na osteotomia, com valor máximo de 27,6Pa no grupo trocantérico. Conclusão Tanto nas osteotomias no nível trocantérico, quanto subtrocantérico, a estabilidade da fixação foi muitas vezes menor que no modelo diafisário, sugerindo que as hastes intramedulares flexíveis não são implantes adequados para as fixações proximais do fêmur.

Comparison of DN4 and DN4 Interview Tests in the Identification of Neuropathic Pain after Fracture Surgery / Comparação entre os testes DN4 e DN4 interview na identificação de dor neuropática após cirurgia de fraturas

Abstract Objective: This study aimed to compare results obtained with the DN4 (in-person interview) and DN4i (telephone interview) questionnaires in identifying neuropathic pain after fracture surgery. Methods: This study was methodological, using questionnaires administered in person (DN4) or via telephone (DN4i). The participants were at least 18 years old, underwent fracture surgery at a university hospital between January 2017 and July 2020, signed the Informed Consent Form (ICF), and could go to the Orthopedics and Traumatology Hospital. Pearson's correlation coefficient determined the agreement between the total score obtained during in-person and telephone interviews. The kappa coefficient evaluated the agreement between individual questionnaire items. Results: Of the 53 participants, 50 presented the same result for neuropathic pain screening in DN4 and DN4i, including 41 with a positive score for neuropathic pain and 12 with a negative score. The Pearson's correlation coefficient and kappa coefficient were r = 0.84. Conclusion: DN4 and DN4i presented a strong agreement between individual items of the questionnaires and the total scores obtained.

Resumo Objetivo: Comparar os resultados obtidos através do questionário DN4 com os do DN4i com aplicação via telefônica na identificação de dor neuropática após cirurgia de fraturas. Métodos: Este foi um estudo metodológico com questionário aplicado presencialmente (DN4) e por telefone (DN4i). Foram elegíveis os participantes maiores de 18 anos de idade submetidos à cirurgia de fraturas em um hospital universitário no período de janeiro de 2017 a julho de 2020, que assinaram o Termo de Consentimento Livre e Esclarecido (TCLE) e puderam comparecer ao departamento de Ortopedia e Traumatologia do hospital. A concordância entre a pontuação total obtida na aplicação presencial e por telefone foi avaliada por meio do coeficiente de correlação de Pearson. O coeficiente de Kappa foi utilizado para avaliar a concordância entre os itens individuais dos questionários. Resultados: Dos 53 participantes, 50 apresentaram resultado igual para rastreio de dor neuropática em relação ao DN4 com o DN4i, sendo 41 com escore positivo para dor neuropática e 12 com escore negativo. O coeficiente de correlação de Pearson e o coeficiente Kappa apresentaram r = 0.84. Conclusão: O uso telefônico do DN4i comparado à aplicação presencial do DN4 apresenta forte concordância tanto entre os itens individuais dos questionários quanto entre a pontuação total obtida.

Supracondylar fractures in children: a systematic review of treatment options / Fraturas supracondilianas infantis: revisão sistemática de opções de tratamento

ABSTRACT Objective: To compare the outcomes of surgical stabilization of pediatric supracondylar humeral fractures with the use of crossed Kirschner wires versus divergent lateral pinning wires. Methods: This is a systematic review with meta-analysis carried out by searching the MEDLINE/PubMed, Science Direct and Scielo databases. In these, the search for journals was carried out between January and August 2023, where 695 studies were found. To assess the quality of the studies, the Jadad and the MINORS scales were used.. The selection and reading of relevant articles were carried out by the researchers and 11 studies met the selection criteria. Results: From the 11 selected studies, 963 patients who met the criteria for the surgical treatment of these fractures were grouped. After the statistical analysis, we found that the ulnar nerve injury had a higher incidence when the crossed-K wire technique was used; and the lateral fixation is safer for the ulnar nerve. Conclusion: Both fixation techniques determine good functional results. However, fixation with lateral Kirschner wires proves to be safer considering the risk of iatrogenic injury to the ulnar nerve. Crossed-K wire fixation is more effective in terms of stability and maintenance of fracture reduction. Level of Evidence II, Systematic Review of Level II or Level I Studies with discrepant results.

RESUMO Objetivo: Comparar os desfechos da estabilização cirúrgica das fraturas supracondilianas do úmero pediátricas com o uso de fios de Kirschner cruzados versus fios laterais divergentes. Métodos: Trata-se de uma Revisão Sistemática com metanálise realizada pela pesquisa nas bases de dados MEDLINE/PubMed, Science Direct e Scielo. Nessas, a busca dos periódicos foi realizada entre janeiro e agosto de 2023, e foram encontrados 695 estudos. Para a avaliação da sua qualidade, foram utilizadas a escala de Jadad e a escala MINORS. A seleção e a leitura dos artigos pertinentes foram realizadas pelos pesquisadores e 11 estudos preencheram os critérios de escolha. Resultados: Dos estudos selecionados, agrupamos 963 pacientes que preenchiam os critérios para o tratamento cirúrgico das fraturas. Após a análise estatística, observamos que maior incidência de lesão do nervo ulnar quando foi utilizada a técnica de pinagem cruzada; e a fixação lateral demonstrou ser mais segura para tal. Conclusão: Ambas as técnicas de fixação determinam bons resultados funcionais. Entretanto, a fixação com fios de Kirschner laterais demonstra ser mais segura, considerando o risco de lesão iatrogênica do nervo ulnar. A fixação com fios cruzados é mais eficaz, levando em conta a estabilidade e a manutenção da redução das fraturas. Nível de evidência II, Revisão sistemática de Estudos de Nível II ou Nível I com resultados discrepantes.

Risk of Neurovascular Injury during Screw Fixation of Tibial Tubercle Fractures in Pediatric and Adolescent Patients.

Objective To review knee magnetic resonance imaging (MRI) scans for the analysis of the location of neurovascular structures (NVSs), and to define the risk of bicortical fixation. Methods Distances between the posterior cortex and the popliteal NVSs were measured on the MRI scans of 45 adolescents (50 knees) at 3 levels (C1: center of the proximal tibial epiphysis; C2: 10 mm distal to the physis; and C3: 20 mm distal to the physis). The NVSs located between 5 mm and 10 mm from the incision were considered in a zone of moderate risk for damage, while those less than 5 mm from the incision were considered in a zone of high risk for damage, and those more than 10 mm from the incision were considered to be in a zone of low risk for damage. The independent Student t -test was used for the comparison of the NVS distance 0with gender, skeletal maturity, and the tibial tubercle-trochlear groove (TT-TG) distance. Values of p < 0.05 were regarded as statistically significant. Results The path of the C1 screw posed an increased risk of damage to the popliteal artery and vein compared with other screw paths ( p < 0.001). The popliteal artery has a high risk of damage at the level of C1 (4.2 ± 2.2mm), and a moderate risk at C2 (9.6 ± 2.4mm), and the popliteal vein has a moderate risk at C1 (6.0 ± 2.7 mm), and a low risk at C2 and C3 (10.8 ± 3.1mm, and 12.05 ± 3.1mm respectively). The C3 position presented the lowest risk of damage to these structures ( p < 0.001). The distance between the posterior tibial cortex and the posterior tibial nerve was < 15 mm at the 3 levels analyzed (C1: 11.0 ± 3.7 mm; C2: 13.1 ± 3.8 mm; and C3: 13 ± 3.9 mm). Conclusions The present study clarifies that the popliteal vessels are at risk of injury during tibial tubercle screw fixation, particularly when drilling the proximal tibial epiphysis. Monocortical drilling and screw fixation are recommended for the surgical treatment of tibial tubercle fractures. Level of Evidence III Diagnostic study.

METACARPAL FRACTURES TREATMENT: COMPARASION BETWEEN KIRSCHNER WIRE AND INTRAMEDULLARY SCREW.

Introduction: Metacarpal fractures are common and can be treated surgically using Kirschner wires (K-wires) or intramedullary fixation with compression screws (IMCS). Objectives: Analyze the postsurgical results from treating the metacarpal extra-articular fractures through the retrograde Kirschner wire technique, and compare it with the intramedullary compression screw fixation. Methods: Retrospective and quantitative studies were to analyze patients' medical records, and a postsurgical evaluation questionnaire was given to the patients, who were divided into K-wire and IMCS. Results: The period of immobilization with a splint took six weeks for the K-wire group and four weeks for the IMCS group. The average time for consolidation took, respectively, fifty-seven days and forty-seven days. The first group could restart their activities twenty-two days after the other, and the average force value of the treated hand, when compared with its contralateral, was 93.9% and 95.4%, respectively. Between the operated hand and its contralateral, there was a difference of 16° in the total measures of the metacarpophalangeal and interphalangeal joint's range of movement among the K-wire group and 5° among the IMCS group. Conclusion: The patients who participated in this study showed excellent results after surgery, and both treatments were proven to be safe and reliable. Evidence level III; Retrospective comparative study .

Introdução: Fraturas dos metacarpos são frequentes e podem ser tratadas de forma cirúrgica com os fios de Kirschner (FK) e Fixação Intramedular com Parafuso de Compressão (FIPC). Objetivo: Analisar os resultados pós-operatórios do tratamento das fraturas extra-articulares dos metacarpos pela técnica retrógrada com fios de Kirschner e comparar com a fixação intramedular utilizando parafuso de compressão. Métodos: Estudo retrospectivo, quantitativo, com análise de prontuários, utilizando questionários de avaliação pós-operatória em dez pacientes divididos em dois grupos: FIPC e FK. Resultados: O período de imobilização com tala nos grupos FK e FIPC foram de seis e quatro semanas respectivamente, já o tempo médio para consolidação foi de 57 e 47 dias respectivamente. O grupo FK retornou as atividades laborais após os FIPC. O valor médio de força na mão acometida comparada a contralateral foi de 93,9% no grupo FK, e no FIPC de 95,4%. Medidas da soma de amplitude de movimento das articulações metacarpofalangeanas e interfalangeanas no grupo FK obtiveram diferença média entre as mãos operada e a contralateral de 16°, já na FIPC observou-se 5°. Conclusão: Os pacientes estudados apresentaram excelentes resultados pós-operatórios e ambos os tratamentos provam ser seguros e confiáveis. Nível de evidência III; Estudo retrospectivo comparativo .

Surgical versus non-surgical treatment of flail chest: a meta-analysis of randomized controlled trials.

PURPOSE: Conflicting evidence exists on the choice of surgical or non-surgical treatment of flail chest injuries. We aimed to perform a meta-analysis comparing outcomes in patients presenting flail chest undergoing surgical or non-surgical treatment. METHODS: Embase, PubMed, and Cochrane databases were searched for randomized controlled trials (RCTs) comparing surgery to no surgery in patients with acute unstable chest wall injuries. We computed weighted mean differences (WMDs) for continuous outcomes and risk ratios (RRs) for binary endpoints, with 95% confidence intervals (CIs). Random effects meta-analyses were performed. Heterogeneity was assessed using I2 statistics. RESULTS: Six RCTs (544 patients) were included, and surgical treatment was used in 269 (49.4%). Compared to no surgery, surgery reduced mechanical ventilation days (WMD - 4.34, 95% CI - 6.98, - 1.69; p < 0.01; I2 = 87%; GRADE: very low; PI - 13.51, 4.84); length of intensive care unit stay (WMD - 4.62, 95% CI - 7.19, - 2.05; p < 0.01; I2 = 78%; GRADE: low; PI - 12.86, 3.61) and the incidence of pneumonia (RR 0.50, 95% CI 0.31, 0.81; p = 0.005; I2 = 54%; GRADE: moderate; PI 0.13, 1.91). No difference in mortality (RR 0.56, 95% CI 0.19, 1.65; p = 0.27; I2 = 23%; GRADE: moderate; PI 0.04, 7.25), length of hospital stay (WMD - 5.39, 95% CI - 11.38, - 0.60; p = 0.08; I2 = 89%; GRADE: very low; PI - 11.38, 0.60), or need for tracheostomy (RR 0.59, 95% CI 0.34, 1.03; p = 0.06; I2 = 54%; GRADE: moderate; PI 0.11, 3.24) was found. CONCLUSIONS: Our results suggest that surgical treatment is advantageous compared to non-surgical treatment for patients with flail chest secondary to rib fractures.

SURGICAL TREATMENT OF CLAVICLE FRACTURES: A DESCRIPTIVE ANALYSIS OF 88 CASES.

Clavicle fractures are one of the most common types of bone injuries in adults. Recently, the treatment protocol for these fractures has undergone changes. Objective: To better understand the epidemiological and behavioral profile of these lesions when they require surgical treatment. Methods: This is an analysis of a series of cases. Our sample included individuals undergoing surgical treatment for clavicle fractures. Results: In total, 88 subjects fulfilled the predetermined criteria. Among these, 75 (85.22%) were male; automobile accidents corresponded to the largest etiological group, reaching 48% of prevalence; there was a slight predominance of the right side, totaling 45 cases (51%); most fractures were classified as Allman type I; an infection rate was observed in 1.13% of the cases; and the development of pseudarthrosis was identified in 2.27% of the patients. Conclusion: The incidence of clavicle fracture is higher in young men, mainly caused by car accidents, being mostly located in the middle third. No statistical significance was found between the synthesis material data and the postoperative complication rate, revealing the absence of risk superiority between the different types of surgical approaches used. Level of Evidence IV, Case Series.

As fraturas de clavícula consistem em um dos tipos mais comuns de lesões ósseas na população adulta. O protocolo de tratamento dessas fraturas tem sofrido modificações. Objetivo: Compreender melhor o perfil epidemiológico e comportamental das lesões de clavícula submetidas a tratamento cirúrgico. Métodos: Análise de uma série de casos, cuja amostragem incluiu indivíduos submetidos à abordagem cirúrgica de fratura de clavícula. Resultados: No total, 88 indivíduos preencheram os critérios pré-determinados. Dentre estes, 75 (85,22%) eram do sexo masculino; o acidente automobilístico correspondeu ao maior grupo etiológico (48%); houve ligeira predominância do lado direito, totalizando 45 casos (51%); a maior parte das fraturas foi classificada como Allman tipo I; observou-se uma taxa de infecção em 1,13% dos casos; e o desenvolvimento de pseudoartrose foi identificado em 2,27% dos pacientes. Conclusão: A incidência de fratura de clavícula é maior em homens jovens, ocasionada principalmente por acidentes automobilísticos, sendo, na maioria dos casos, localizada no terço médio. Não foi encontrada significância estatística entre os dados do material de síntese e o índice de complicação pós-operatória, revelando a ausência de superioridade de risco entre os diferentes tipos de abordagem cirúrgica. Nível de Evidência IV, Série de Casos.

Caracterización de las fracturas supracondíleas del húmero en niños que requirieron manejo quirúrgico en un hospital de Santander, Colombia / Characterization of Supracondylar Fractures of the Humerus in Children who Required Surgical Management at a Hospital in Santander, Colombia / Caracterização das fraturas supracondilianas do úmero em crianças que precisaram de tratamento cirúrgico em um hospital de Santander, Colômbia

Introducción. El objetivo del estudio fue describir las características sociodemográficas, tratamiento y complicaciones pre y posquirúrgicas de las fracturas supracondíleas del húmero distal en niños que requirieron manejo quirúrgico en un hospital de Santander, Colombia. Metodología. Se trata de un estudio observacional, descriptivo, de corte transversal con 58 pacientes que cumplieron los siguientes criterios de inclusión: edad entre 3 a 14 años, fracturas supracondíleas de manejo quirúrgico; como criterios de exclusión se tomó: antecedente de enfermedad ósea o neurológica previa y fracturas de más de 7 días de evolución. Para las variables continuas se usó medidas de tendencia central y dispersión, las categóricas en porcentajes y frecuencias absolutas. Resultados. La edad media de presentación fue de 6.2 años, el principal mecanismo de trauma fue caídas de altura con un 96.5%. El 65.5% provenía de zonas urbanas. El 13.8% se asoció con fracturas de antebrazo, y el 3.4% de epitróclea. La fijación se realizó en un 75% con técnica cruzada y un 17.2% se asoció con lesión iatrogénica del nervio ulnar. Discusión. En el estudio no se informaron lesiones vasculares; sin embargo, se documentó una alta prevalencia de lesión neurológica con la fijación medial, similar a lo descrito en la literatura (1.4%-17.7%); algunos autores describen técnicas que disminuyen estas lesiones hasta en un 0%. Conclusión. Las características sociodemográficas de nuestra población coinciden con la estadística publicada mundialmente; la principal complicación fue la lesión iatrogénica nervio ulnar, que se puede disminuir con un uso racional del pin medial y con el empleo de técnicas que busquen rechazar directamente el nervio. Palabras clave: Fracturas del Húmero; Fijación Interna de Fracturas; Clavos Ortopédicos; Codo; Niño; Nervio Cubital.

Introduction. The objective of this study was to describe sociodemographic characteristic, treatment, and pre- and post-surgical complications of supracondylar fractures of the distal humerus in children who required surgical management at a hospital in Santander, Colombia. Methodology. This was an observational, descriptive, and cross-sectional study involving 58 patients who met inclusion criteria: age between 3 and 14 years old, supracondylar fractures with surgical management; exclusion criteria include previous bone or neurological illness and fractures with more than 7 days of evolution. Central tendency and dispersion measures were used for continuous variables, and categorical variables in percentages and absolute frequencies. Results. The average age at presentation was 6.2 years old, the main mechanism of trauma was fall from height (96.5%). 65.5% came from urban zones. The 13.8% were associated with forearm fractures, and 3.4% with epitrochlear fractures. Pinning was performed at 75% with crossed technique and 17.2% were associated with iatrogenic ulnar nerve injury. Discussion. Study didn't inform vascular injuries. However, a high prevalence of neurological injury with medial pinning was documented, similar to that describe in the literature (1.4%-17.7%); some author described techniques that reduce these lesions by 0%. Conclusion. The sociodemographic characteristics of our population match with worldwide published statistics; the main complication was iatrogenic ulnar nerve injury, which can be reduced with the rational use of medial pin and with the application of techniques that seek to directly spare the nerve. Keywords: Humeral Fractures; Fracture Fixation, Internal; Bone Nails; Elbow; Child; Ulnar Nerve.

Introdução. O objetivo do estudo foi descrever as características sociodemográficas, o tratamento e as complicações pré e pós-cirúrgicas das fraturas supracondilianas do úmero distal em crianças que precisaram de tratamento cirúrgico em um hospital de Santander, Colômbia. Metodologia. Trata-se de um estudo observacional, descritivo e transversal com 58 pacientes que atenderam aos seguintes critérios de inclusão: idade entre 3 e 14 anos, fraturas supracondilianas tratadas cirurgicamente. Os critérios de exclusão foram: histórico de doença óssea ou neurológica prévia e fraturas com duração superior a 7 dias de evolução. Para variáveis contínuas foram utilizadas medidas de tendência central e dispersão, as categóricas em percentuais e frequências absolutas. Resultados. A média de idade de apresentação foi de 6.2 anos, o principal mecanismo de trauma foi a queda de altura com 96.5%. 65.5% vieram de áreas urbanas. 13.8% estavam associados a fraturas de antebraço e 3.4% a epitróclea. A fixação foi realizada em 75% com técnica cruzada e 17.2% esteve associada à lesão iatrogênica do nervo ulnar. Discussão. Nenhuma lesão vascular foi relatada no estudo. No entanto, foi documentada alta prevalência de lesão neurológica com fixação medial, semelhante à descrita na literatura (1.4%-17.7%). Alguns autores descrevem técnicas que reduzem essas lesões em até 0%. Conclusão. As características sociodemográficas da nossa população coincidem com as estatísticas publicadas mundialmente. A principal complicação foi a lesão iatrogênica do nervo ulnar, que pode ser reduzida com o uso racional do pino medial e com o uso de técnicas que buscam rejeitar diretamente o nervo. Palavras-chave: Fraturas do Úmero; Fixação Interna de Fraturas; Pinos Ortopédicos; Cotovelo; Criança; Nervo Ulnar

Perfil epidemiológico do uso de sistemas de fixação pela Cirurgia e Traumatologia Buco-Maxilo-Faciais em um Hospital Universitário / Epidemiological profile of the use of fixation systems by Oral and Maxillofacial Surgery and Traumatology in a University Hospital / Perfil epidemiológico del uso de sistemas de fijación por Cirugía Oral y Maxilofacial y Traumatología en un Hospital Universitario

Introdução: O tecido ósseo é um tipo de tecido conjuntivo especializado, caracterizado pelo seu metabolismo dinâmico. Ao sofrer um trauma, podendo ser cirúrgico (como osteotomias) ou não cirúrgico, resultando em uma fratura, o osso passa por dois processos de cicatrização, primária e secundária. A primária é caracterizada pelo mínimo movimento entre os fragmentos, e ocorre na presença de estabilização, sendo muitas vezes a fixação interna (FI) responsável por isso. A secundária ocorre na presença de um gap entre os fragmentos ósseos, na ausência de estabilização. Ambas resultam em consolidação óssea, mas apenas a primeira garante recuperação precoce de função (como fala e mastigação) e da estética facial do paciente. Objetivos: O objetivo deste trabalho foi realizar um levantamento epidemiológico a respeito do uso dos sistemas de fixação interna utilizados pela Cirurgia e Traumatologia Buco-maxilo-faciais no Hospital Universitário da UFPI. Metodologia e Resultados: Pesquisa submetida e liberada pelo Comitê de Ética em Pesquisa do HU-UFPI com o número CAAE: 52493221.9.0000.8050. Foram coletados dados de 271 procedimentos registrados no sistema do hospital. Havendo 228 pacientes no total, 69 que realizaram cirurgia em outro estabelecimento de saúde, mas apresentando falha de FI com indicação de remoção; divididos em sub-áreas, 146 procedimentos foram de trauma de face, 40 de correção de deformidades dentofaciais, 28 de ressecção de tumores e 14 de cirurgia reconstrutiva. Os sítios anatômicos onde houve maior número de instalação e remoção de FI foram: mandíbula, complexo órbito-zigomático-maxilar e maxila. Cirurgia reconstrutiva foi a subárea que teve três abordagens com substituição de FI, sendo em todas o sítio anatômico a mandíbula. As principais falhas de FI encontradas foram infecção e exposição. Conclusão: Tem se mostrado uma tarefa difícil determinar as razões pelas quais um sistema de fixação deve ser removido, mesmo quando este apresenta falha. Não há consenso entre os cirurgiões sobre um protocolo de remoção de FI após o período de consolidação óssea ter passado, mas é sugerido por alguns remover as placas e parafusos após um período de 3 meses, a fim de evitar sensibilidade, palpabilidade e outras complicações, no entanto é necessário considerar a morbidade de um segundo procedimento... (AU)

Introduction: Bone tissue is a type of specialized connective tissue characterized by its dynamic metabolism. When suffering trauma, which can be surgical (such as osteotomies) or non-surgical, resulting in a fracture, the bone undergoes two healing processes, primary and secondary. The primary healing is characterized by minimal movement between fragments and occurs in the presence of stabilization, often with internal fixation (IF) responsible for this. The secondary one occurs in the presence of a gap between the bone fragments, in the absence of stabilization. Both result in bone consolidation, but only the first guarantees the early recovery of function (such as speech and chewing) and the patient's facial aesthetics. Objectives: The objective of this study was to realize an epidemiological survey regarding the use of internal fixation systems used by Oral and Maxillofacial Surgery at the University Hospital of UFPI. Methodology and Results: This research was submitted and released by the Research Ethics Committee of the HU-UFPI with the number CAAE: 52493221.9.0000.8050. Data were collected from 271 procedures registered in the hospital system. There were 228 patients in total, 69 who underwent surgery at another health facility, but with IF failure with an indication for removal; divided into sub-areas, 146 procedures were for facial trauma, 40 for correction of dentofacial deformities, 28 for tumour resection and 14 for reconstructive surgery. The anatomical sites where there was more installation and removal of FI were: mandible, orbital-zygomatic-maxillary complex and maxilla. Reconstructive surgery was the sub-area that had three approaches with IF replacement, in all of which the anatomic site was the mandible. The main IF failures found were infection and exposure. Conclusion: It has proved to be a difficult task to determine the reasons why plates and screws of a fixation system should be removed, even when it fails. There is no consensus among surgeons on a protocol for removing IF after the period of bone healing has passed, but it is suggested by some to remove the plates and screws after 3 months to avoid tenderness, palpability, and other complications, however it is necessary to consider the morbidity of a second procedure... (AU)

Introducción: El tejido óseo es un tipo de tejido conectivo especializado que se caracteriza por su metabolismo dinámico. Cuando se sufre un traumatismo, que puede ser quirúrgico (como las osteotomías) o no quirúrgico, que resulta en una fractura, el hueso sufre dos procesos de curación, primario y secundario. La curación primaria se caracteriza por un movimiento mínimo entre fragmentos y se produce en presencia de estabilización, a menudo con la fijación interna (FI) responsable de ello. El secundario ocurre en presencia de un espacio entre los fragmentos óseos, en ausencia de estabilización. Ambos dan como resultado la consolidación ósea, pero sólo el primero garantiza la recuperación temprana de la función (como el habla y la masticación) y la estética facial del paciente. Objetivos: El objetivo de este estudio fue realizar una encuesta epidemiológica sobre el uso de sistemas de fijación interna utilizados en Cirugía Oral y Maxilofacial en el Hospital Universitario de la UFPI. Metodología y Resultados: Esta investigación fue presentada y difundida por el Comité de Ética en Investigación del HU-UFPI con el número CAAE: 52493221.9.0000.8050. Se recogieron datos de 271 procedimientos registrados en el sistema hospitalario. Fueron 228 pacientes en total, 69 que fueron intervenidos quirúrgicamente en otro centro de salud, pero con fracaso del IF con indicación de retiro; divididos en subáreas, 146 procedimientos fueron de traumatismo facial, 40 de corrección de deformidades dentofaciales, 28 de resección de tumores y 14 de cirugía reconstructiva. Los sitios anatómicos donde hubo mayor instalación y remoción de FI fueron: mandíbula, complejo orbitario-cigomático-maxilar y maxilar. La cirugía reconstructiva fue la subárea que tuvo tres abordajes con reemplazo de IF, en todos los cuales el sitio anatómico fue la mandíbula. Las principales fallas de FI encontradas fueron la infección y la exposición. Conclusión: Ha demostrado ser una tarea difícil determinar las razones por las cuales se deben retirar las placas y tornillos de un sistema de fijación, incluso cuando falla. No existe consenso entre los cirujanos sobre un protocolo para retirar el IF una vez transcurrido el período de curación ósea, pero algunos sugieren retirar las placas y los tornillos después de 3 meses para evitar sensibilidad, palpabilidad y otras complicaciones, sin embargo es necesario. considerar la morbilidad de un segundo procedimiento... (AU)