Improved Quality of Life After Mandibular Advancement by Bilateral Internal Ramus Distraction.

BACKGROUND: Obstructive Sleep Apnea (OSA) is a significant health issue due to noncompliance with continuous positive airway pressure treatment. Therefore, evaluating alternative treatments is crucial. PURPOSE: Analyze the impact of maxillomandibular advancement using bilateral internal ramus distraction (BIRD) on quality of life (QOL) in OSA patients. STUDY DESIGN, SETTING, AND SAMPLE: A prospective cohort study was conducted at the Oral and Maxillofacial Surgery Department of the University Hospital "La Princesa." The study included patients with moderate to severe OSA who were treated with the BIRD approach. PREDICTOR VARIABLE: Changes in measured variables were analyzed at three time points: before surgery (T1), after mandibular advancement (T2), and after maxillary advancement (T3). MAIN OUTCOME VARIABLE(S): QOL changes measured by Quebec Sleep Questionnaire and the Epworth Sleepiness Scale. Secondary outcomes included: apnea-hypopnea index (AHI), oxygen desaturation index, and percentage of time with saturation below 90%. COVARIATES: Age, sex, continuous positive airway pressure treatment, cephalometric variables and cardiovascular risk parameters were considered. ANALYSES: Statistical analysis employed the Friedman test and χ2 test, with a significance level of P ≤ .05. RESULTS: The study included 32 patients (22% with moderate OSA, 78% with severe OSA). Epworth Sleepiness Scale scores significantly decreased between T1 (13.4 ± 4.4) and T2 (5.8 ± 3.6) and T3 (1.9 ± 1.8) (P < .001). QOL improvements were observed in all domains: daytime sleepiness T1 (3.0 ± 1.3) T2 (5.4 ± 1.4) T3 (6.3 ± 1.0); diurnal symptoms T1 (2.5 ± 1.4) T2 (5.2 ± 1.3) T3 (6.2 ± 1.1); nocturnal symptoms T1 (2.5 ± 1.1) T2 (5.6 ± 1.1) T3 (6.5 ± 0.8); emotions T1 (2.6 ± 1.6) T2 (5.3 ± 1.4) T3 (6.5 ± 0.9); and social interaction T1 (2.5 ± 1.6) T2 (5.4 ± 1.6) T3 (6.3 ± 1.2) (P < .001). AHI decreased between T1 (47.9 ± 23.1) and T2 (14.4 ± 14.3) and T3 (4.7 ± 5.6) h-1 (P < .001), with a final cure rate of 81.2% (defined as final AHI<5 h-1). Oxygen desaturation index and percentage of time with saturation below 90% also showed significant reductions (P < .001). CONCLUSIONS AND RELEVANCE: BIRD approach for OSA demonstrated a high cure rate and significant QOL improvements. It shows promise as an effective surgical option. Further research and long-term follow-up are needed.

Temporomandibular Joint: Approach to the Intermediate Space by Triangulation With Transillumination Reference.

Arthroscopy of the temporomandibular joint is a minimally invasive surgical procedure. Nowadays, 3 levels are described depending on the complexity. Level I involves a single puncture with an anterior irrigating needle for outflow. Level II involves a double puncture using triangulation in order to be able to perform minor operative maneuvers. Subsequently, it is possible to progress to Level III and perform more advanced techniques, through multiple punctures, involving the arthroscopic canula and 2 or more working cannulas. However, in cases of advanced degenerative pathology or re-arthroscopy, it is common to observe advanced fibrillation, severe synovitis, adhesions, or articular obliteration which makes conventional triangulation difficult. On these cases, we propose a simple and effective technique that facilitates approach to the intermediate space by means of triangulation with transillumination reference.

Prognostic Involvement of Lymph Node Density in Oral Squamous Cell Carcinoma. A New Predictive Model.

PURPOSE: Lymph node density (LND) has been reported to be a significant predictor of survival in oral squamous cell carcinoma (OSCC). The aim of this study was to analyze LND as a prognostic factor in OSCC and create a predictive model that determines the probability of death in these patients. METHODS: A retrospective cohort study was carried out with a cohort of patients who underwent cervical dissection and primary resection of OSCC between 1980 and 2020. The primary predictor variable in this study was LND, which is defined as the number of positive lymph nodes divided by the total number of lymph nodes removed. The cutoff values for prediction of disease-specific survival (DSS) were calculated by receiver operating characteristic curve analysis, which determined the best cutoff value was 0.07. Patients were divided into binary subgroups (low and high risk) using the best cutoff value of LND. The outcome variable was DSS, defined as the duration from the date of diagnosis to death due to OSCC and not due to other causes or secondary tumors. Other variables were type of neck dissection, postsurgical treatment, surgical margin, pathological T category stage, pathological N category (pN) stage, extranodal extension, perineural invasion, bone invasion, and presence of recurrence. A predictive model (score) was generated by selecting variables using a log-rank test and by using the Cox proportional-hazards regression (multivariate analysis). RESULTS: The sample consisted of 368 patients, 252 (68.5%) male and 116 (31.5%) female patients, with a mean age of 60.3 years. According to the LND cutoff value, there were 289 patients with a low LND (≤0.07) and 79 with a high LND (>0.07). The univariate analysis showed LND as a significant predictor of DSS at 5 years (67.1% in LND ≤ 0.07 vs 32.9% in LND > 0.07; P < .001). The Cox multivariate analysis identified LND (hazard ratio [HR] = 27.2; 95% confidence interval [CI], 3.18-231; P = .002), recurrence (HR = 4.45; 95% CI, 2.3-8.4; P < .001), and type of treatment (HR = 0.52; 95% CI, 0.34-0.81; P < .001) as independent predictive factors for DSS. In the predictive model, the presence of recurrence was the most important factor with 8 points, whereas LND >0.07 contributed only 1 point; however, the 2 categories resulting from this limit were statistically significant. CONCLUSIONS: Our study demonstrates that LND is an additional prognostic factor in patients with a pN+ disease. In addition, our predictive model could be useful in the therapeutic algorithm of OSCC patients, as it can predict the probability of death in these patients.

Is There a Relationship Between Age, Personal Factors or Surgical Findings, and Outcome After Temporomandibular Joint Arthroscopy?

PURPOSE: The variables involved in prognosis after treatment of internal derangement (ID) of the temporomandibular joint (TMJ) are unclear. The purpose of this study was to estimate the frequency and identify which factors are associated with treatment success (or failure) among patients with ID managed with arthroscopy. MATERIAL AND METHODS: A retrospective cohort study was carried out of patients undergoing TMJ arthroscopy over a 9-year-period. The predictor variable was composed of a set of demographic, clinical, and operative findings, including, as primary variable, the patient's age. The primary outcome variable was based on the American Association of Oral and Maxillofacial Surgery (AAOMS) criteria of pain (measured by visual analogue scale (VAS)) and maximal interincisal opening (MIO) defined as VAS ≤ 3 and MIO greater 35 mm and grouped as success or failure. The improvement in pain and functional values were compared with the age by using the Pearson correlation coefficient, whereas categorical variables were tested using chi-squared analysis, and mean values were compared with Student t-test or ANOVA. Subsequently, a logistic regression model was used, and the odds ratios (OR) of the evaluated comparisons were calculated. RESULTS: A total of 212 patients were included in this study. In terms of arthroscopic findings, the presence of severe chondromalacia, adhesions or disc perforation (P < .001), was related with older patients. However, there was no statistically significant correlation between age and the postoperative improvement referred to pain or MIO. According to the AAOMS criteria, the procedure was successful in 54.24% of the cases. Two factors were related with a favorable outcome in the adjusted regression analysis: a higher presurgical MIO (OR 0.91, P < .001) and the presence of adhesions (OR 0.41, P = .003). CONCLUSION: Age has no influence on the outcome after arthroscopy. A higher presurgical MIO and the presence of adhesions provide, in the long-term, a favorable prognosis.

Nuevos avances en las prótesis ATM customizadas: nuestra experiencia en el Hospital Universitario La Princesa / New advances in customized TMJ prosthesis: our experience at La Princesa University Hospital

INTRODUCCIÓN: Presentamos nuestra experiencia y serie de casos en los que se ha utilizado la prótesis de ATM diseñada y desarrollada en España por el Dr. Carlos Goizueta (Hospital Sant Joan d'Alacant) junto con el Instituto Tecnológico de Canarias y Maxilaria. MATERIALES Y MÉTODOS: Pacientes tratados con patología de la articulación temporomandibular y que han sido reconstruidos con una prótesis de ATM. Esta prótesis tiene cuatro componentes, dos de la fosa articular (una parte de titanio y la otra de polietileno) y dos del cuerpo de la prótesis (cabeza de cromo-cobalto y rama de titanio). RESULTADOS: Se presentan los resultados preliminares de los pacientes reconstruidos con prótesis de ATM en los últimos 2 años en nuestro centro. Se han colocado un total de 8 prótesis en 6 PACIENTES: El diagnóstico de los pacientes fue anquilosis en 4 de los casos, y disfunción ATM avanzada en los otros 2. Se vio una mejoría, tanto del dolor como de la apertura oral, en un seguimiento mínimo de 6 meses. CONCLUSIÓN: Esta prótesis de ATM, de desarrollo nacional, tiene varias ventajas como son la posibilidad de recambio de algún componente y también el diseño del mismo hace que las fuerzas masticatorias se transmiten a la rama mandibular y no a los tornillos de la prótesis

INTRODUCTION: We present our experience and case series in which we used a TMJ prosthesis designed and developed in Spain by Dr. Carlos Goizueta (Hospital Sant Joan d'Alacant), together with the Technological Institute of Canarias and Maxilaria. MATERIALS AND METHODS: Patients diagnosed with temporomandibular joint pathology who were reconstructed with a TMJ prosthesis. This prosthesis has four components, two of the articular fossa (one part of titanium and the other part of polyethylene) and two of the body of the device (condylar head of cobalt-chrome and ramus of titanium). RESULTS: We present the preliminary results of the patients reconstructed with a TMJ prosthesis in the past 2 years in our center. A total of 8 prosthesis were place in 6 PATIENTS: The diagnosis of the patients was TMJ ankylosis in 4 cases, and severe TMJ dysfunction in the other 2 cases. An improvement of both pain and also mouth opening was observed after a follow-up of at least 6 months. CONCLUSION: This TMJ prosthesis, developed in Spain, has many advantages, such as the possibility of replacement of some of the parts, as well as its design since the masticatory forces are transmitted to the mandibular ramus and not to the screws of the device

Eficacia de la acupuntura en el tratamiento del síndrome de dolor miofascial de la musculatura masticatoria / Efficacy of acupuncture for the treatment of myofascial pain síndrome of the masticatory musculature

Objetivos: El síndrome de dolor miofascial (SDM) de la musculatura masticatoria (MM) constituye la patología más frecuente dentro de los trastornos temporomandibulares (TTM). En cuanto al tratamiento del SDM de la MM, no existen protocolos estandarizados. Hay evidencia de que la acupuntura es eficaz en el tratamiento del dolor miofascial. El objetivo del presente estudio es analizar la eficacia de la acupuntura en el tratamiento del SDM de la MM en términos de reducción de la intensidad del dolor y la duración de la reducción del dolor en el tiempo. Material y métodos: Se realizó un estudio observacional prospectivo en 30 pacientes diagnosticados de SDM de la MM que fueron tratados mediante 15 sesiones de acupuntura. Las variables del estudio fueron: 1) Porcentaje de pacientes que alcanzan una respuesta clínica relevante a lo largo del seguimiento (disminución del dolor de, al menos, un 50 % en la escala visual analógica con respecto al inicial o bien una reducción total del dolor a < 30 mm en la misma escala). 2) Reducción del dolor muscular orofacial después del tratamiento, expresado en milímetros (mm), dentro de la escala visual analógica (EVA). 3) Máxima apertura oral (MAO) expresada en mm. 4) Estabilidad del efecto terapéutico. Las variables fueron evaluadas antes del tratamiento, a los 3, 6, 9 y 12 meses. Resultados: La mediana de edad fue de 42 años (33-53). Con respecto al sexo, 28 de los 30 pacientes (93 %) fueron mujeres. El seguimiento fue completo para los 30 pacientes. Al final del seguimiento, 20 de los 30 pacientes (67 %, IC 95% 49-81) mantuvieron una reducción del dolor a la categoría leve (EVA < 30 %) o bien una reducción > 50 % del basal. A lo largo del estudio, el porcentaje de pacientes que alcanzó el criterio de respuesta clínica relevante preestablecido se mantuvo estable (67-80 %), no variando significativamente a lo largo del tiempo. Conclusiones: Los resultados del estudio demuestran que la acupuntura es eficaz en el control del dolor del SDM de la MM. Los efectos terapéuticos de la acupuntura son de inicio temprano (< 3 meses), estables y se mantienen hasta el final del seguimiento de un año

Objectives: Myofascial Pain Syndrome (MPS) of the Masticatory Muscles (MM) is one of the most prevalent diseases included in the Temporomandibular Joint Dysfunction Syndrome. Regarding its treatment, there are not standarized protocols. There is some evidence that acupuncture is effective in MPS of the MM treatment. The objective of the present study is to analyze the efficacy of acupuncture for the treatment of MPS of the MM, in terms of pain intensity reduction and duration of the pain reduction along time. Patients and methods: This is an observational prospective study. Thirty patients diagnosed of MPS of the MM were treated with 15 sessions of acupuncture. The variables of the study included were: 1) Percentage of patients that achieved a relevant clinical response (pain reduction of at least 50 % from the initial value, in a visual analogue scale, or a visual analogue scale pain value less than 30 milimeters). 2) Pain reduction after treatment, measured in milimeters in a visual analogue scale (VAS). 3) Maximal mouth opening measured in milimeters. 4) Stability of the pain reduction. The variables were evaluated before treatment and 3, 6, 9 and 12 months after. Results: The median of age was 42 years (33-53). Twenty eight patients were female (93 %). The follow up period lasted one year and all the patients completed it. At the end of the follow up period, 20 of the 30 patients (67 %, IC 95 % 49-81) maintained a pain reduction in a mild category (VAS < 30 %) or a total reduction of > 50 % from de initial pain value. Along the follow-up period, the percentage of patients that achieved a relevant clinical response maintained stable (67-80 %). Conclusions: The results of the study show that acupuncture is effective in the treatment of MPS of the MM. Treatment effects appear early (< 3 months) and maintain stable within the first year

Influencia de la edad en los hallazgos y el resultado del tratamiento artroscópico de la disfunción temporomandibular. Un estudio basado en 162 casos / Influence of age on the findings and outcome of arthroscopic treatment of temporomandibular dysfunction. A study based on 162 cases

Introducción: El propósito del presente estudio fue analizar si los hallazgos artroscópicos y la mejoría clínica tras dicho tratamiento quirúrgico difieren en virtud de la edad de los pacientes afectos por disfunción temporomandibular. Material y métodos: Se revisaron de manera retrospectiva los datos correspondientes a los pacientes tratados durante 7 años en dos centros hospitalarios en los cuales el tratamiento artroscópico se realizó de acuerdo con el mismo protocolo. Se consideraron solo los pacientes con diagnóstico de bloqueo crónico (estadios IV y V, según clasificación de Wilkes-Bronstein). El estudio implicó el análisis de dos grupos de pacientes diferenciados: a) Grupo A menores de 45 años al diagnóstico, b) Grupo B mayores de 45 años al diagnóstico. Durante la fase diagnóstica del protocolo de artroscopia por disfunción temporomandibular, se recogieron los parámetros «sinovitis» y «condromalacia». Asimismo se analizó la presencia o no de adherencias y/o de perforación discal. En cuanto al resultado clínico del tratamiento de los pacientes, se consideró el dolor durante la función mandibular, la máxima apertura interincisal, el movimiento protrusivo y de lateralidad en sentido contralateral a la articulación afecta como variables de estudio. Dichos datos se consideraron durante el postoperatorio al mes, 3, 6, 9, 12 y 24 meses. El análisis de los datos se basó en un análisis de la varianza de una vía para las variables cuantitativas y el test de χ2 para el estudio de las variables cualitativas. Los valores se consideraron significativos para una p < 0,05. Resultados: La población de estudio incluyó 162 pacientes (Grupo A 90 pacientes, Grupo B 72 pacientes). Los hallazgos de sinovitis y condromalacia en fase avanzada fueron más frecuentes para el grupo B de estudio con diferencias estadísticamente significativas, mientras que los hallazgos de adherencias y perforación discal no difirieron entre ambos grupos. Tras la realización de artroscopia de la ATM, se observó un descenso significativo del dolor (desde el primer mes postoperatorio) junto con un incremento significativo de la máxima apertura interincisal (a partir de 3 meses de seguimiento poscirugía) en ambos grupos de estudio. Conclusiones: El tratamiento mediante artroscopia de la disfunción temporomandibular en fases avanzadas de la enfermedad produce una mejoría clínica tanto en pacientes mayores como menores de 45 años de edad. Los pacientes mayores de 45 años presentan cambios patológicos intraarticulares correspondientes tanto a sinovitis como a condromalacia en fases más avanzadas. Por el contrario, estos pacientes mayores no muestran un incidencia superior de otros signos de degeneración articular como presencia de adherencias o perforación discal

Introduction: The aim of this study was to analyse whether the findings and clinical improvement after arthroscopic surgical treatment were different according to the age of the patients affected by temporomandibular dysfunction. Material and methods: A retrospective review was performed on the data corresponding to patients treated arthroscopically over a 7-year period in two hospitals using the same protocol. Only patients with a diagnosis of chronic closed lock (stage IV and V, according to Wilkes-Bronstein classification) were considered. The study involved the analysis of two different patient groups: a) Group A under 45 years of age at diagnosis, b) Group B over 45 years of age at diagnosis. During the diagnostic phase of the temporomandibular dysfunction arthroscopy protocol, the parameters "synovitis" and "chondromalacia" were collected for the evaluation of the synovial membrane and joint surface, respectively. The presence or absence of adhesions and/or disc perforation was also analysed. Regarding the clinical outcome of the treatment of patients, pain during mandibular function, maximum inter-incisal opening, protrusive movement, and laterality in contralateral direction to the joint involved, were considered as study variables. These data were collected at 3, 6, 9, 12, and 24 months after the surgery. Data analysis was based on a one-way variance analysis for quantitative variables and the χ2 test for the study of qualitative variables. The values were considered significant for a p < .05. Results: The study population included 162 patients (Group A 90 patients, group B 72 patients). Pathological findings of advanced-stage synovitis and chondromalacia were more frequent for group B, with statistically significant differences, while findings of disc adhesions and perforation did not differ between both groups. After TMJ arthroscopy, a significant decrease in pain (from the first postoperative month) was observed, together with a significant increase in maximum inter-incisal opening (from 3 months post-surgery follow-up) in both study groups. The rate of patients undergoing re-arthroscopy or open joint surgery in post-surgery follow-up was higher in Group A patients. Conclusions: Arthroscopic treatment of temporomandibular dysfunction in advanced stages of the disease shows a clinical improvement in patients over and under 45 years of age. Patients over 45 years of age showed intra-articular pathological changes corresponding to both synovitis and chondromalacia in more advanced phases. In contrast, these older patients did not show a higher incidence of other signs of joint degeneration, such as adhesions or disc perforation. Patients over 45 years of age did not have any differences in the percentage of failure and/or re-operation after arthroscopic treatment of temporomandibular dysfunction, compared to younger patients

Arthroscopic Management of Synovial Chondromatosis of the Temporomandibular Joint. Case Series and Systematic Review.

AIM: Synovial chondromatosis (SC) is a benign condition that is characterized by the formation of cartilaginous nodules within the synovial tissue of a joint that may detach and form loose bodies inside the articular space. The purpose of this study is to evaluate the use of surgical arthroscopy for the treatment of SC of the temporomandibular joint (TMJ). MATERIALS AND METHODS: A series of six patients treated with arthroscopy (one patient requiring an open arthrotomy due to the size of the loose bodies) in our centre between 1997 and 2016 is presented and results are discussed. A systematic review of the literature of patients with SC treated with arthroscopy or arthroscopy-assisted open arthrotomy is also carried out. RESULTS: Pain, which was the main symptom in our patients, and maximum mouth opening both improved significantly after surgical treatment. Three of the patients were diagnosed with primary SC, and the other 3 had a previous diagnosis of internal derangement. None of the patients showed signs of relapse during the follow-up period. CONCLUSIONS: Surgical arthroscopy is a minimally invasive procedure that allows the extraction of loose bodies and even partial synovectomy of the affected membrane with good results and without recurrence of the disease. This technique can be useful in cases of SC with loose bodies measuring less than 3 mm or without extra-articular extension.

Manejo de la osteonecrosis maxilar asociada al uso de medicamentos en virtud de su estadio clínico: análisis de 19 casos / Management of medication-related osteonecrosis of the jaw according to the clinical grade: An analysis of 19 cases

Introducción: Los bifosfonatos constituyen una familia de medicamentos cuya acción principal es la inhibición de la reabsorción ósea, uno de cuyos efectos secundarios es la osteonecrosis maxilar (OMAB). En 2010 comenzaron a publicarse casos de osteonecrosis asociados a un nuevo fármaco, el denosumab. En 2014 se recomendó cambiar el nombre de OMAB por osteonecrosis maxilar asociada a medicamentos (OMAM). El objetivo de este trabajo es revisar una serie de casos de OMAM tratados en nuestro servicio y reflejar la experiencia adquirida con las distintas opciones terapéuticas según la clasificación clínica definida por la American Association of Oral and Maxillofacial Surgeons (AAOMS). Materiales y métodos: Se recogió retrospectivamente un grupo de 19 pacientes con diagnóstico de OMAM, manejados desde 2005 hasta 2015. Su estadio fue determinado según la clasificación de la AAOMS y Ruggiero. Las lesiones fueron tratadas según sus características clínicas y radiológicas. Resultados: Su edad media fue de 75 años. La enfermedad de base era osteoporosis en 11 pacientes (58%), cáncer de próstata en 2 (11%), cáncer de mama en otrod 2 (11%) y mieloma múltiple en 4 pacientes (20%). En 9 pacientes el bifosfonato utilizado era intravenoso (47%); en los 4 restantes se usó la vía oral (alendronato e ibandronato, 21%) y el denosumab se administra por vía subcutánea. Los pacientes en estadio 3 fueron tratados en todos los casos con mandibulectomía segmentaria. Tres de ellos fueron reconstruidos con colgajo microquirúrgico de peroné y uno con barra mandibular más cierre directo. Fueron tratados mediante secuestrectomía 7 pacientes, de los cuales 5 tenían estadio 2 y 2 tenían estadio 1. Con desbridamiento local solo fue tratado un paciente, que presentaba estadio 1. El tratamiento conservador se aplicó al resto de los pacientes estadio 1 (4 pacientes) y a 3 pacientes del estadio 2. Conclusiones: El tratamiento de la OMAM depende del estadio de la enfermedad; la mandibulectomía es un tratamiento efectivo en el estadio 3 y la secuestrectomía en el estadio 2; el estadio 1 suele controlarse con tratamiento conservador

Introduction: Bisphosphonates are a family of drugs used to inhibit bone resorption. One of their secondary effects is osteonecrosis of the jaws (ONJ). In 2010, scientists began to publish cases of osteonecrosis of the jaws associated with a new drug, denosumab. In 2014 it was recommended to change the name of ONJ to medication-related osteonecrosis of the jaws (MONJ). The aim of this article is to review a case series of MONJ treated in our Department, and present our experience in the different treatment options according to the clinical classification defined by the American Association of Oral Maxillofacial Surgeons (AAOMS). Materials and methods: A retrospective review was performed on 19 patients with MONJ, who were managed between 2005 and 2015. The clinical staging was according to the classification of the AAOMS and Ruggiero. The lesions were treated according to their clinical and radiological presentation. Results: The mean age was 75 years. The underlying disease was osteoporosis in 11 patients (58%), prostate cancer in 2 patients (11%), breast cancer in 2 patients (11%), and multiple myeloma in 4 patients (20%). Intravenous bisphosphonates were used in 9 (47%) patients, and oral in the remaining 4 (alendronate and ibandronate, 21%), with denosumab being administered subcutaneously. Stage 3 patients were treated in all cases with segmental mandibulectomy. Three of them were re-constructed with a microsurgical fibula flap, and onw with bar and direct closure. Sequestrectomy was used to treat 7 patients, of which 5 had stage 2, and 2 stage 1. One patient with stage 1 was treated with local debridement. Conservative treatment was applied to the rest (4) of the stage 1 patients, and 3 stage 2 patients. Discussion: Mandibulectomy is an effective treatment for stage 3, sequestrectomy for stage 2, and conservative measures for stage 1. This pathology is also associated with other drugs, such as denosumab, which is why the term had changed to medication-related osteonecrosis of the jaw. Conclusions: MONJ treatment depends on the stage of the disease, with mandibulectomy being an effective treatment in stage 3, sequestrectomy in stage 2 and stage 1 is usually controlled with conservative treatment

Mixoma odontogénico: presentación de una serie de 4 casos clínicos y revisión de la literatura / Odontogenic myxoma: Presentation of a series of 4 clinical cases and review of the literature

Objetivo: El objetivo de este artículo es presentar 3 casos de mixoma odontogénico (MO), un caso de fibromixoma (FM) y una revisión sistemática de la literatura de MO y FM, enfocándonos especialmente en la epidemiología y tratamiento. Métodos: Se revisan todos los casos de MO y FM tratados en nuestro hospital. Se buscó en la base de datos de PubMed utilizando las palabras clave MESH: mixoma odontogénico, mixofibroma odontogénico, fibromixoma odontogénico, desde enero del año 2010 hasta octubre del 2016. Resultados: Se presentan 4 casos clínicos intervenidos en nuestro servicio. Tres de ellos se resecaron y fueron reconstruidos con colgajo de peroné, en el otro se realizó legrado; ninguno presentó recidiva. De los 281 estudios iniciales identificados en PubMed, solo 24 cumplieron con los criterios de inclusión de nuestra investigación; la edad media de los pacientes fue de 32,6 años, eran mujeres el 59%, la localización fue mandibular posterior en el 54% de los casos y hubo recidiva solo en un caso. Para FM identificamos 5 artículos, de los cuales el 50% eran mujeres con una edad media de 16,5 años; el 80% fueron tratados con enucleación y legrado, sin recurrencia. Conclusión: El MO es un tumor poco frecuente, con una variante llamada FM aún más infrecuente y que no es tan recidivante como se describe. La elección de tratamiento depende de ciertas variables como son la localización, la edad del paciente y las necesidades reconstructivas

Purpose: The aim of this work is to report 3 cases of odontogenic myxoma (OM), one case of fibromyxoma (FM), and a review of the literature as regards the epidemiology and treatment of OM and FM. Methods: A study was conducted on all cases of OM and FM treated in our hospital. A search was made in PubMed database using the MESH keywords: «odontogenic myxoma» «odontogenic myxofibroma», «odontogenic fibromyxoma», from January 2010 to October 2016. Results: Of the 4 cases managed in our hospital, 3 of them were resected and reconstructed with fibula flap, and the other one was managed by legrado, with no recurrences. From the first 281 initial papers identified in PubMed, only 24 fulfilled the inclusion criteria of our study. The mean age of patients was 32.6 years, of whom 59% were women, and with posterior mandibular localitation in 54% of the cases and occurrence in only one case. As regards FM, 5 articles were identified in which 50% were women with a mean age of 16.5 years, and 80% were treated by enucleation and legrado with no recurrences. Conclusions: OM is a rare tumour, with a variant called FM that is less common and not as recurrent as described. The choice of treatment should depend on variables such as location, age, and the aesthetic needs of the patient

Crecimiento tumoral agresivo coincidente con el uso de distracción osteogénica mandibular. Presentación de un caso / Aggressive tumor growth associated with the use of mandibular distraction osteogenesis. A case presentation

Propósito. Comunicar un caso inusual de crecimiento tumoral agresivo en relación con el uso de distracción mandibular. La situación clínica presentada sugiere que los factores bioquímicos liberados durante la distracción ósea pueden interferir el desarrollo de los tumores malignos activos, provocando una rápida progresión. Material y métodos. Presentamos el caso de una paciente con antecedentes de carcinoma basocelular esclerosante recurrente en el área labiomentoniana izquierda. A pesar de los múltiples intentos de extirpar completamente el tumor y el estrecho seguimiento realizado, 18 años después de realizar el diagnóstico inicial las biopsias tomadas mostraron infiltración tumoral de la mandíbula. Con el fin de minimizar la cantidad de hueso y partes blandas necesarias para la reconstrucción, se decidió realizar una distracción mandibular bilateral antes de realizar la resección mandibular, aprovechando así el crecimiento muy lento que tenía el tumor. Al cabo de 5 semanas de iniciar la distracción se objetivó una gran masa tumoral de nueva aparición al nivel del suelo de la boca anterior, que posteriormente se confirmó que tenía el mismo diagnóstico histopatológico que el tumor inicial. Resultados. Debido a la inesperada ocurrencia de la complicación presentada tuvimos que abandonar la distracción, y decidimos realizar una resección de espesor total del tercio facial inferior y la reconstrucción del defecto con un injerto libre vascularizado de peroné y un colgajo miocutáneo pectoral. Conclusión. La distracción osteogénica puede complicar el curso de un proceso neoplásico local y su uso debe ser valorado como posible contraindicación en pacientes con procesos tumorales activos (AU)

Purpose. to report an unusual case of aggressive tumoral growth related to the use of mandibular distraction. The clinical situation presented suggests that the biochemical factors released during the osseous distraction can interfere with the development of the active malignant tumors, triggering a rapid progression. Material and methods. We present the case of a patient who had a history of recurrent sclerosing basal cell carcinoma in the left chin area. Despite of the multiples attempts to completely remove the tumor and the close follow- up conducted, 18 years from the initial diagnosis the biopsies taken showed tumoral infiltration of the mandibular bone. In order to take advantage of the slow rate of the tumoral growth, we decided to carry out a bilateral mandibular distraction before performing the mandibular resection and reduce in this manner the amount of the bone necessary for the reconstruction. Five weeks after the onset of the bone distraction a newly emerging tumoral mass could be observed in the anterior floor of the mouth, which was confirmed to have the same histological diagnose as the initial tumor. Results. Due to the unexpected complication we had to abandon the distraction and decided to perform a full-thickness resection of the inferior third of the face and the reconstruction of the defect using a free vascularized fibular graft and a pectoralis major myocutaneous flap. Conclusion. Distraction osteogenesis can complicate the course of a local neoplastic process and its use should be valued as a potential contraindication in patients with active tumors (AU)

Pathological mandibular fracture: A severe complication of periimplantitis.

Nowadays, dental implant treatment is a very common option for patients even in medical compromised conditons. Some complications related to them have been described. Periimplantitis (PI) is one of the biggest concerns complications of these kind of treatments, probably has a multifactorial aethiology. Usually the consequences of PI are the loss of the implants and prostheses, expenses of money and time for dentists and patients. Very often PI implies the necesity of repeating the treatment . Pathological mandibular fracture due to PI is a severe but infrequent complication after dental implant treatment, especially after PI. In this study we present three cases of mandibular pathologic fractures among patients with different medical and dental records but similar management: two of them had been treated years ago of oral squamous cell carcinoma with surgery and radiotherapy, the other patient received oral bisphosphonates for osteoporosis some years after implantation. We analized the causes, consequences and posible prevention of these fractures as well as the special features of this kind of mandibular fractures and the different existing treatments. Key words:Periimplantitis, pathological mandibular fracture, mandibular atrophy, bicortical implants.

Temporomandibular joint disc perforation: long-term results after operative arthroscopy.

PURPOSE: Disc perforation (DP) is one of the most important pathologic signs of intracapsular temporomandibular joint (TMJ) disease; however, few clinical studies have focused on the arthroscopic management of this feature. The purpose of the present study was to assess whether operative arthroscopy with abrasion of the perforation borders is effective for the treatment of this alteration of the internal derangement of the TMJ. PATIENTS AND METHODS: Thirty-six patients (39 joints) who underwent TMJ arthroscopy under general anesthesia and presented with DP (Wilkes stages IV and V) from 1994 through 2006 were included in this study. The age range at the time of surgery was 14 to 59 years. DPs were classified into 3 groups according to size: small (SMA), medium (MED), or large (LAR). Pain (visual analog scale, scores 0 to 100), maximal interincisal opening, and lateral and protrusive excursions were assessed at 1, 3, 6, 12, 24 and 48 months after surgery. Preoperative and postoperative scores were compared and tested for statistically significant differences by the Student t test for paired data. The level of statistical significance was set at .05. Differences in the global, SMA, MED, and LAR groups were evaluated. RESULTS: In the global group, the mean score of preoperative pain according to the visual analog scale was 53.97 mm, which decreased to 14.33 mm at 4-year follow-up. The maximal interincisal opening improved from a mean of 28.56 mm before surgery to 34.88 mm after the final follow-up. SMA perforations were found in 11 cases (28.20%), MED in 19 cases (48.71%), and LAR in 9 cases (23.07%). A significant decrease in pain (P < .01) was observed from the first postoperative month to the end of the follow-up period in the global and SMA groups. A statistically significant increase in mouth opening was observed in the global group from 6 months postoperatively; however, no significant differences were observed in the MED and LAR groups from before surgery to the different times of follow-up. After the final follow-up, 2 patients underwent open TMJ surgery owing to unfavorable results. CONCLUSIONS: Operative arthroscopy of the TMJ is a reliable and effective procedure for the articular dysfunction associated with DP because this procedure alleviates pain and improves mouth opening. Patients with SMA perforations are better candidates for this surgical treatment.

Zygomatic distraction osteogenesis for correction of midfacial support after hemimaxillectomy: experience and technical considerations.

PURPOSE: The maxilla is the functional and esthetic keystone of the midface, and large maxillary defects remain a challenge for reconstructive surgery. Different regional and microvascularized flaps have been used to restore the hemimaxilla. Distraction osteogenesis offers an alternative to complex flaps, with less donor-site morbidity. This method is also preferable as a secondary reconstruction in cases of serious bone defects where other flaps have failed. PATIENTS AND METHODS: Four patients with maxillary defects after oncologic ablation presented at a mean follow-up period of 36 months (standard deviation, 18 mo). In these patients, transport distraction osteogenesis of the zygoma was used to restore the bony support of the low maxilla. RESULTS: After a latency period of 15 days, distraction began at a rate of 0.5 mm/day. A 2-step distraction, by changing the direction of the zygomatic device, was carried out in 3 cases. After a consolidation period of 4 to 6 months for each distraction, the devices were removed and the bone edges were joined together with an autogenous bone graft (anterior iliac crest and calvaria). A good quality of bone was observed in the distracted gap, which allowed for postoperative dental implant placement and prosthetic rehabilitation. CONCLUSION: In patients with large maxillary defects in which the remaining bone is insufficient and in patients in whom other reconstructive methods have failed, zygomatic distraction is an excellent option to restore the low projection of the maxilla. Bone transport was found to be a stable reconstructive method that allowed for the restoration of function and esthetics in oncologic patients.

Sutura mecánica microvascular en cirugía reconstructiva de cabeza y cuello / Mechanical microvascular suture in head and neck reconstruction surgery

Objetivos. Comprobar la eficacia y aplicabilidad de la anastomosis mecánica microvascular en arteria y vena en la serie a estudio. Material y método. Estudio retrospectivo de 25 pacientes sometidos a reconstrucciones microquirúrgicas de cabeza y cuello. Variables a estudio: tipo de injerto, tamaño del anillo utilizado, vasos receptores utilizados, test de permeabilidad intraoperatorio, tiempo de anastomosis, necesidad de revisión de anastomosis y fracaso del injerto (trombosis venosa, o fracaso arterial). Resultados. Serie de 25 pacientes con 50 anastomosis. 25 venosas, 22 arteriales mecánicas y 3 reconvertidas a manuales. Vasos receptores: arteria tiroidea superior (70%) y una de las ramas venosas del tronco común tirolinguofacial (80%). Tiempo medio de anastomosis 8 min. Cuatro pacientes requirieron revisión de las anastomosis, con una tasa de rescate del 25%. 3 fracasos de los cuales uno fue una reconversión a sutura manual. Conclusión. La sutura mecánica microvascular es una técnica con una eficacia al menos igual que la sutura manual, tanto en arteria como en vena, con un menor tiempo de anastomosis (reducción del 60%) y una aplicabilidad arterial con resultados satisfactorios teniendo en cuenta ciertas restricciones(AU)

Objectives. To evaluate the efficacy and applicability of mechanical microvascular anastomosis performed in the artery and vein in the studied series. Material and method. A retrospective study of 25 patients who underwent microsurgical reconstruction of head and neck. Data were collected by: graft type, coupler size, recipient vessels, intraoperative patency test, anastomosis time, need for revision of anastomosis, and graft failure (venous thrombosis or arterial failure). Results. A series of 25 patients with 50 anastomosis. 25 venous, 22 arterial mechanical anastomisis and 3 converted to hand-sewn anastomosis. Recipient vessels: superior thyroid artery (70%) and venous branches of the thyro-linguo-facial common trunk (80%). The mean anastomosis time was 8min. Four patients required revision of the anastomosis, with a salvage rate of 25%. There were 3 failures, oneof which was a conversion to manual suturing. Conclusion. Microvascular mechanical anastomoisis is a technique with an efficiency at least equal to the hand-sewn artery and vein anastomosis, with a shorter anastomosis (60% time reduction) and arterial use with satisfactory results, taking into account certain restrictions(AU)

Osseointegrated implant rehabilitation of irradiated oral cancer patients.

PURPOSE: The aim of this study is to analyze implant survival in patients who received radiotherapy treatment for oral malignancies and in patients who had suffered mandibular osteoradionecrosis. MATERIALS AND METHODS: We reviewed retrospectively 225 implants placed in 30 patients who had received radiotherapy as part of the oncologic treatment. Radiation doses ranged between 50 and 70 Gy. 39 implants were placed after a combined treatment of radiotherapy and chemotherapy. Data referred to tumour type and reconstruction, presence of osteoradionecrosis, region of implant installation and type of prostheses were recorded. Survival rates were calculated with cumulative Kaplan-Meier survival curves and compared between different groups with a log-rank test. RESULTS: 152 osseointegrated implants were placed in patients who presented previous reconstruction procedure. Five patients developed osteorradionecrosis as a complication of the radiotherapy treatment. Once osteoradionecrosis had healed in these patients, 41 implants were installed. The overall 5 year survival rate in irradiated patients was 92.6%. Irradiated patients had a marginally significantly higher implant loss than non-irradiated patients. (p = 0.063). The 5 year survival rate in the osteoradionecrosis group was of 48.3% and in the non-osteoradionecrosis group 92.3%, with a statistically significant difference between both groups. (p = 0.002). CONCLUSION: Osseointegrated implants enhance oral rehabilitation in most irradiated patients, even being an acceptable option for patients who had suffered osteoradionecrosis. Totally implant supported prostheses are recommended after irradiation providing functional, stable and aesthetically satisfactory rehabilitation.

Arthroscopic lysis and lavage versus operative arthroscopy in the outcome of temporomandibular joint internal derangement: a comparative study based on Wilkes stages.

PURPOSE: To assess whether arthroscopic lysis and lavage (ALL) or operative arthroscopy (OA) is more effective for the treatment of temporomandibular joint (TMJ) internal derangement at any stage of involvement. PATIENTS AND METHODS: In 458 patients (611 joints) with internal derangement of the TMJ classified as Wilkes stages II through V, arthroscopy was performed. Pain (visual analog scale score, 0-100) and maximal interincisal opening were assessed at 1, 3, 6, 9, 12, and 24 months after surgery. RESULTS: ALL was performed in 308 of 611 arthroscopies (50.4%), and OA was performed in 303 arthroscopies (49.59%). A significant decrease in pain (P < .001) was observed for all patients at any time during the follow-up period from the first month postoperatively to the end of the 2-year follow-up period. A highly significant increase in mouth opening greater than 13 mm was observed in the group of patients classified as Wilkes stage IV from the first month postoperatively. When we compared ALL versus OA among Wilkes stages, no significant differences in terms of pain were observed during the entire follow-up period. CONCLUSIONS: Both ALL and OA are equally effective at decreasing pain in patients with TMJ internal derangement of any Wilkes stage. Patients classified as Wilkes stage IV presenting with chronic closed lock of the TMJ had the highest decrease in pain and the highest increase in mouth opening among the stages, thus confirming these patients as the best candidates for arthroscopy.

Vertical distraction osteogenesis of a free vascularized fibula flap in a reconstructed hemimandible for mandibular reconstruction and optimization of the implant prosthetic rehabilitation. Report of a case

Free vascularized fibular flap is considered the treatment of choice in mandibular reconstruction for extensive bone defects (over 6 centimeters) resulting from trauma, infections or tumor resections. But, when the reconstruction involves a dentate mandible, the fibula has the limit as it does not offer sufficient bone height to restore the alveolararch up to the occlusal plane. Therefore, the deficiency in bone height makes implant placement impractical.We report a case of vertical distraction osteogenesis of a free vascularized fibula flap used to reconstruct a hemimandibleafter resection of an odontogenic myxoma, for optimization of the implant prosthetic rehabilitation. The distraction device was applied intraorally. After 10 days of latency period, distraction protocol was performed at adistraction rate of 0.5 mm per day. A consolidation period of 3 months followed. Afterwards the distraction device was removed and 3 osseo integrated dental implants were placed in the distracted area. As a result, the vertical discrepancy between the fibula and the native hemimandible was corrected. The amount of vertical height achievedafter distraction was 17 milimeters. The increase of vertical bone height was stable and enabled placement of dental implants without any complications. In conclusion, we consider that vertical distraction osteogenesis of free vascularized flaps is a reliable technique that optimizes implant positioning for ideal prosthetic rehabilitation,after mandibular reconstruction following tumor surgery (AU)