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Background: Pelvic fractures are commonly ecountered in cats. The ilium is included in approximately 50% of pelvic fractures in cats. Although conservative management of the pelvic fracture is known to have good prognosis, surgical fixation is recommended for the pelvic fracture with ilial fractures. 3D printing is an accurate digital modeling method by converting two-dimensional (2D) images into 3D model. 3D printing in veterinary medicine has been described in the various orthopedic diseases such angular limb deformities or fractures. The use of 3D model for presurgical planning is helpful to improve the results of complex surgical interventions. The objective of this study is to identify the usefulness of fabricating 3D models based on allogenic 2D data with aid of 3D printer program. Case: A 4-year-old spayed female domestic shorthair cat presented with hindlimb lameness. Radiography revealed left ilial body fracture with multiple fractures including left tuber ischium, pubic symphysis, and bilateral cranial ramuses of pubis. Digital imaging and communication in medicine (DICOM) files of the complete ilium were extracted from a computed tomography (CT) scan of a healthy and castrated male cat of same breed. Volume rendering images were prepared by Slicer program based on DICOM files. After acquired 3D data were converted to STL (Standard Triangulation Language) file for the 3D printing machine, non-fracture involved area was removed except the left ilium using the Meshmixer® software and then data was stored as STL files again. The length of 3D model was adjusted to actual size using 3D printer firmware based on actual size of the ilial length. Subsequently, 3D modelling was performed using 3D printer. The plate was precontoured to conform to the lateral surface of the 3D model. Internal fixation using precontoured plate resulted in accurate bone alignment. The alignment of the ilium remained appropriate throughtout the follow-up period. Complete union was identified 6 months after surgery. Discussion: Although the most common method for the ilial fractures is the application of bone plates to the lateral side of the ilium, bone plate fixation is more challenging in cats owing to the small bone size and small surface area of the fracture sites compared to dogs. Therefore, it is important to make accurate presurgical planning for successful result of a surgery. 3D printing based on actual patient have several limitations including time for complete printing process and additional anesthetic episode to acquire CT images. However, in simple cases, a presurgical CT scan may not be necessary if the plate can be precisely precontured based on the data from the other patient. In this way, the additional financial burden for CT examination also might be reduced. On the other hand, technical difficulty of utilizing hardware and software, and financial availability were another drawback. However, in this current study, most of limitations regarding conventional 3D printing based on actual patient were overcome by the application of the fused deposition modeling (FDM) technology with allogenic data. In the current study, total time for fabrication of 3D model based on FDM technology, was less than 3 h, which are much shorter than the time for conventional 3D printing. The difference of the ilial length between the actual patient and the 3D model was adjusted through the firmware program. Thus, differences of the conformation or size between the 3D model and the ilium of the patient was negligible during the surgery, although 2D images were not acquired from actual patient. Intraoperative contouring of the plate was not required. In conclusion, through presurgical plate contouring by the 3D bone template based on non-patient specific data, successful treatment of the ilial fracture was possible.

RESUMEN

Twelve dogs with traumatic hip luxation were selected for surgical intervention with a modified iliofemoral suture technique using an anchor screw to substitute the passage of suture material through a perforated tunnel in the ilium. Six procedures were performed with non-absorbable suture and other six with absorbable suture materials. These cases were evaluated at 15, 30, 60, and 90 days after surgery by performing an ambulation analysis and palpation of the joint. In all cases, there was a return of partial and total limb support in an average of 3 and 19 postoperative, respectively. The fixation strategy of the suture material in the ilium using an anchor screw proved to be efficient with a smaller surgical approach and lesser surgical difficulty, maintaining joint congruence in acute as chronic luxation cases. The use of absorbable and non-absorbable sutures had excellent clinical results, but there was a subjective superiority of the first ones, once 4 dogs of the non-absorbable group presented some discomfort during the postoperative palpation of the joint, 90 days after surgery.(AU)

Doze cães com luxação coxofemoral traumática foram submetidos à intervenção cirúrgica de sutura iliofemoral modificada com uso de parafuso âncora substituindo a passagem de fio através de túnel perfurado no ílio. Seis procedimentos foram realizados com fio não absorvível, e outros seis com fio absorvível. Os casos foram avaliados aos 15, 30, 60 e 90 dias após a cirurgia, por meio de análise de deambulação e palpação articular. Em todos os casos, houve retorno de suporte parcial e total do peso no membro operado, em média, aos três e 19 dias de pós-operatório, respectivamente. A estratégia de fixação do fio de sutura no ílio com parafuso âncora se mostrou eficaz, permitindo uma abordagem cirúrgica menos invasiva, com menor dificuldade na execução, garantindo manutenção da congruência articular tanto em quadros de luxação aguda como crônica. O uso de fio absorvível e não absorvível teve bons resultados clínicos, porém houve uma superioridade subjetiva do primeiro, uma vez que quatro pacientes do grupo fio inabsorvível mostraram desconforto à palpação da articulação aos 90 dias após a cirurgia.(AU)

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In veterinary medicine, the cell therapy is still unexplored and there are many unanswered questions that researchers tend to extrapolate to humans in an attempt to treat certain injuries. Investigating this subject in nonhuman primates turns out to be an unparalleled opportunity to better understand the dynamics of stem cells against some diseases. Thus, we aimed to compare the efficiency of bone marrow mononuclear cells (BMMCs) and mesenchymal stem cells (MSCs) from adipose tissue of Chlorocebus aethiops in induced bone injury. Ten animals were used, male adults subjected, to bone injury the iliac crests. The MSCs were isolated by and cultured. In an autologous manner, the BMMCs were infused in the right iliac crest, and MSCs from adipose tissue in the left iliac crest. After 4.8 months, the right iliac crests fully reconstructed, while left iliac crest continued to have obvious bone defects for up to 5.8 months after cell infusion. The best option for treatment of injuries with bone tissue loss in old world primates is to use autologous MSCs from adipose tissue, suggesting we can extrapolate the results to humans, since there is phylogenetic proximity between species.(AU)

Na medicina veterinária, a terapia celular ainda é inexplorada e há muitas perguntas não respondidas, o que leva os pesquisadores a uma tendência a estender a terapia para os seres humanos, na tentativa de tratar certas lesões. Investigar esse assunto em primatas não humanos revela-se uma oportunidade sem precedentes para compreender melhor a dinâmica das células-tronco contra algumas doenças. Assim, objetivou-se comparar a eficiência das células mononucleares de medula óssea (BMMCs) e das células-tronco mesenquimais (MSCs) do tecido adiposo de Chlorocebus aetiops na lesão óssea induzida. Foram utilizados 10 animais, adultos do sexo masculino, submetidos à lesão óssea nas cristas ilíacas. As MSCs foram isoladas e cultivadas; de forma autóloga, as BMMCs foram infundidas na crista ilíaca direita e as MSCs de tecido adiposo na crista ilíaca esquerda. Após 4,8 meses, a crista ilíaca direita foi totalmente reconstruída, enquanto a crista ilíaca esquerda continuou apresentando defeito ósseo evidente por até 5,8 meses após a infusão. A melhor opção para o tratamento de lesões com perda de tecido ósseo em primatas do Velho Mundo é a utilização de MSCs autólogas de tecido adiposo, sugerindo que se podem estender os resultados para seres humanos, uma vez que há proximidade filogenética entre as espécies.(AU)

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Stress fractures and muscle strains are common in marathon runners. Most stress fractures occur in lower extremities and tibia stress fractures comprise almost half. Iliac wing stress fractures are not commonly found in runners and are usually related to osteoporosis. There have been 4 previous reports of iliac stress fractures in marathon runners none reported an associated isolated gluteus minimus tendon tears. We will report a case of a female marathon runner with iliac wing stress fracture with associated isolated gluteus minimus tendon tear.

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Avulsion fractures of the apophysis of the iliac crest have rare incidence and are little known. In this article, we report the case of an 11-year-old female patient who presented this injury after indirect trauma. From careful radiographic analysis, an avulsion fracture of the iliac crest was identified. It was decided to use nonsurgical treatment comprising analgesia and load restriction. This case report emphasizes the importance of suspecting avulsion fractures in cases of low-energy trauma, and also guides the treatment, so as to prevent functional deficit and deformities...

A fratura avulsão da apófise da crista ilíaca apresenta incidência rara e pouco conhecida. Neste artigo relatamos caso de paciente do sexo feminino, de 11 anos, que apresentou essa lesão após trauma indireto. Após uma análise cuidadosa da radiografia, foi identificada fratura avulsão da crista ilíaca e optou-se pelo tratamento não cirúrgico com analgesia e restrição de carga. O relato do caso salienta a importância da suspeição da fratura avulsão em traumas de baixa energia, além de orientar o tratamento e prevenir déficit funcional e deformidades...

RESUMEN

Las fracturas de pelvis en pacientes pediátricos son muy poco frecuentes y representan entre 1% a 3% de todas las fracturas pediátricas. Se asocian con traumatismos de muy alta energía, accidentes automovilísticos y otras lesiones potencialmente fatales. Se realizó un estudio prospectivo, analítico, observacional, de cohorte hospitalaria donde se incluyen todos los pacientes de ambos sexos, con edad inferior o igual a 15 años tratados quirúrgicamente en el Instituto Autónomo Hospital Universitario de los Andes en Mérida, Venezuela, de enero 2005 a enero de 2010. Se encontraron 25 pacientes, 52% de sexo femenino. La edad promedio fue de 9,4 años. El tiempo promedio del seguimiento fue de 43 meses. En 76% la causa fue accidente por vehículo automotor. El patrón de fractura más frecuente fue Tipo IV de Zorode y Zieg, en 88%. Se encontraron lesiones asociadas en 92%, una tasa de mortalidad del 12% e infección en 8%. Las principales complicaciones encontradas fueron la asimetría pélvica. El protocolo de manejo de estas lesiones debe incluir el diagnóstico y clasificación temprana, estabilización y evaluación de acuerdo al ATLS, manejo de las lesiones asociadas y estabilización quirúrgica de las fracturas para evitar asimetría y pobres resultados funcionales(AU)

Pelvic fractures in pediatric patients are rare, accounting for 1% to 3% of all pediatric fractures. They are associated with high energy trauma, car accidents and other life-threatening injuries. We performed a prospective, observational, analytical and hospital cohort. We included all patients of both sexes, aged up to 15 years old treated in the University Hospital Institute of the Andes in Merida, Venezuela, from january 2005 to january 2010. They found 25 patients, 52% were female. The average age was 9.4 years. The mean follow up time was 43 months. In 76% the cause was motor vehicle accident. The most common fracture pattern was Type IV Zorode and Zieg at 88%. Associated lesions were found in 92% patients. The mortality rate 12% and infection was 8%. The main complications were pelvic asymmetry. The protocol for management of these lesions should include early diagnosis and classification, stabilization and evaluation according to ATLS management of associated injuries and surgical stabilization of fractures to avoid asymmetry and poor functional outcomes(AU)

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The authors describe the case of an athlete from the Brazilian national men's basketball team (sub-16) who reported pain in the right iliac region at the end of the season. Clinical and imaging exams revealed an iliac bone stress fracture. A conservative treatment of removing the load from the fracture in combination with physical therapy was chosen. The athlete improved satisfactorily and returned to the sport at the same level as prior to the injury after 14 weeks of treatment.

RESUMEN

OBJETIVO: Avaliar a segurança do uso de fixação iliosacral com parafusos em pacientes com lesão do anel pélvico. MÉTODOS: Trata-se de um trabalho restrospectivo analisando por tomografia computadorizada a topografia de 60 parafusos inseridos em 46 pacientes portadores de lesões do anel pélvico e operados no INTO-RJ, no período de 2006 e 2010. RESULTADOS: Em 21,7 por cento dos casos o parafuso encontrava-se fora do corredor de segurança descrito em literatura. Destes, 77 por cento estavam associados a uma redução insatisfatória do anel pélvico. Não houve casos de lesão neurovascular em nossa série. CONCLUSÃO: O uso de parafusos ílio-sacrais é uma técnica segura, pois mesmo em casos onde o parafuso não respeitou uma topografia ideal, não houve complicações significativas associadas a este método. A má redução do anel pélvico é um fator muito importante associado ao mau posicionamento dos parafusos.

OBJECTIVE: To evaluate the safety of iliosacral screw fixation in pelvic injuries. METHODS: A retrospective study based on computer tomography evaluation of screw topography and its relationship with the so called pelvic safe corridor. RESULTS: We evaluated the topography of 60 screws inserted in 46 patients sustaining pelvic injuries which were operated in the INTO from 2006 to 2010. In 21.7 percent of cases the screw was located outside the safe corridor. 77 percent of these misplaced screws were associated with an unsatisfactory reduction of the pelvic injury. CONCLUSIONS: In our study, a significant rate of misplaced screws in relationship with the safe corridor has been pointed out and in most of these cases an insufficient reduction of the pelvis was also identified. We conclude that iliosacral fixation is a safe adjuvant method for pelvic fixation since in our series even with a relative high incidence of misplacements, no neurovascular injuries have been recorded in association with this technique.

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OBJECTIVE: To report clinical results of patients treated with closed reduction and percutaneous iliosacral screw fixation for unstable pelvic ring fractures. MATERIALS AND METHODS: Retrospective study using medical records, images and late clinical assessment of all patients treated in our centre with percutaneous iliosacral screw fixation for unstable pelvic ring fractures, with a minimum follow-up of 12 months. Seventy-three patients with a mean age of 40.3 years old (range 14-70 years) were treated between July 1998 and December 2005. Seventy-one patients were included. Fractures types included 10 AO type B and 61 AO type C injuries. Forty-two patients had associated injuries. Mean follow-up was 31 months (12-96). Functional status was assessed using Majeed's grading score for pelvic fractures at final follow-up. RESULTS: Sixty-nine patients obtained a satisfactory initial reduction. Two patients had transitory postoperative neurological deficit. Five patients presented hardware failure. Fifteen patients developed sacroiliac osteoarthritis during follow-up. Good and excellent functional results were observed in 66 patients at final follow-up. Five patients had bad results, one due to infection of an anterior pelvic plate and the others due to painful refractory sacroiliac osteoarthritis that required a sacroiliac fusion. Sixty-one (86%) patients were able to return to pre-injury occupation. CONCLUSIONS: Good clinical results with a low and predictable rate of complications can be expected using closed reduction and percutaneous iliosacral screw fixation for unstable pelvic ring fractures.

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Os autores relatam caso de paciente com diagnóstico tardio de hiperparatiroidismo. Mostram a boa evolução das fraturas, apesar da grande osteopenia, e salientam a importância do diagnóstico precoce desta patologia.