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Objective: Tibial plateau fractures are common intra-articular fractures that pose classification and treatment challenges for orthopedic surgeons. Objective: This study examines the value of 3D printing for classifying and planning surgery for complex tibial plateau fractures. Methods: We reviewed 54 complex tibial plateau fractures treated at our hospital from January 2017 to January 2019. Patients underwent preoperative spiral CT scans, with DICOM data processed using Mimics software. 3D printing technology created accurate 1:1 scale models of the fractures. These models helped subdivide the fractures into seven types based on the tibial plateau's geometric planes. Surgical approaches and simulated operations, including fracture reduction and plate placement, were planned using these models. Results: The 3D models accurately depicted the direction and extent of fracture displacement and plateau collapse. They facilitated the preoperative planning, allowing for precise reconstruction strategies and matching intraoperative details with the pre-printed models. Post-surgery, the anatomical structure of the tibial plateau was significantly improved in all 54 cases. Conclusion: 3D printing effectively aids in the classification and preoperative planning of complex tibial plateau fractures, enhancing surgical outcomes and anatomical restoration. Level of Evidence IV, Prospective Study.

Objetivo: As fraturas do planalto tibial são fraturas intra-articulares comuns de classificação e tratamento desafiadores aos cirurgiões ortopédicos. Objetivo: Este estudo investiga o uso de impressão 3D para classificar e planejar a cirurgia de fraturas complexas do planalto tibial. Métodos: 54 fraturas complexas do planalto tibial tratadas em nosso hospital de janeiro de 2017 a janeiro de 2019 foram revisadas. Os pacientes foram submetidos a tomografias computadorizadas em espiral pré-operatórias, com dados DICOM processados usando o software Mimics. A tecnologia de impressão 3D gerou modelos precisos em escala 1:1 das fraturas. Estes modelos ajudaram a subdividir as fraturas em sete tipos com base nos planos geométricos do planalto tibial. As abordagens cirúrgicas e as operações simuladas, incluindo a redução da fratura e a colocação de placa, foram planejadas utilizando estes modelos. Resultados: Os modelos 3D representaram com precisão a direção e a extensão da deslocação da fratura e do colapso do planalto. Os modelos facilitaram o planejamento pré-operatório, viabilizando estratégias de reconstrução precisas e a correspondência dos detalhes intraoperatórios com os modelos pré-impressos. Após a cirurgia, a estrutura anatômica do planalto tibial melhorou significativamente em todos os 54 casos. Conclusão: A impressão 3D ajuda na classificação e no planejamento pré-operatório de fraturas complexas do planalto tibial, melhorando os resultados cirúrgicos e a restauração anatômica. Nível de Evidência IV, Estudo Prospectivo.

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Background: Restoring joint congruence and maintaining reduction until healing is imperative in treating tibial plateau fractures (TPF). The main objective of this study was to evaluate the feasibility of augmentation with impacted bone allograft (IBA) to prevent loss of reduction in tibial plateau fractures during healing and to evaluate its incorporation. Methods: We retrospectively analyzed all patients with an acute, closed tibial plateau fracture (Schatzker II, III, IV) treated between 2010 and 2019 with open reduction and internal fixation (ORIF) and impacted bone allograft (IBA), with a minimum follow-up of 24 months. We evaluated the postoperative radiographs by drawing a line along the tibial axis and another perpendicular to the healthy plateau to measure the reduction and subsequent behavior. The incorporation of the allograft was evaluated by radiological analysis assessing its integration, non-union, resorption, or sclerosis. We used the clinical-radiological Rasmussen system and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) to objectify the outcomes. Results: 78 TPFs were included, with a median age of 51.5 (40.7-62.2) years and a median follow-up of 66 (24-89) months. Two (2.5 %) patients presented loss of joint reduction (subsidence) during the follow-up regarding the achieved in the surgery. Seventy-six (94.7 %) patients presented integration, two (2.5 %) resorption, and one (1.3 %) sclerosis. Seventy-two (92.3 %) patients presented excellent and good results in the Rasmussen radiological score, and 72 (92.3 %) patients presented excellent or good clinical scores. The mean WOMAC at two years postoperatively was 15 ± 6.5. Conclusion: Our results demonstrate that allograft is an adjuvant in maintaining a reduction in type II, III, and IV Schatzker's tibial plateau fractures. Low rates of loss of reduction during follow-up can be expected with its use.

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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

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ABSTRACT Objective: Tibial plateau fractures are common intra-articular fractures that pose classification and treatment challenges for orthopedic surgeons. Objective: This study examines the value of 3D printing for classifying and planning surgery for complex tibial plateau fractures. Methods: We reviewed 54 complex tibial plateau fractures treated at our hospital from January 2017 to January 2019. Patients underwent preoperative spiral CT scans, with DICOM data processed using Mimics software. 3D printing technology created accurate 1:1 scale models of the fractures. These models helped subdivide the fractures into seven types based on the tibial plateau's geometric planes. Surgical approaches and simulated operations, including fracture reduction and plate placement, were planned using these models. Results: The 3D models accurately depicted the direction and extent of fracture displacement and plateau collapse. They facilitated the preoperative planning, allowing for precise reconstruction strategies and matching intraoperative details with the pre-printed models. Post-surgery, the anatomical structure of the tibial plateau was significantly improved in all 54 cases. Conclusion: 3D printing effectively aids in the classification and preoperative planning of complex tibial plateau fractures, enhancing surgical outcomes and anatomical restoration. Level of Evidence IV, Prospective Study.

RESUMO Objetivo: As fraturas do planalto tibial são fraturas intra-articulares comuns de classificação e tratamento desafiadores aos cirurgiões ortopédicos. Objetivo: Este estudo investiga o uso de impressão 3D para classificar e planejar a cirurgia de fraturas complexas do planalto tibial. Métodos: 54 fraturas complexas do planalto tibial tratadas em nosso hospital de janeiro de 2017 a janeiro de 2019 foram revisadas. Os pacientes foram submetidos a tomografias computadorizadas em espiral pré-operatórias, com dados DICOM processados usando o software Mimics. A tecnologia de impressão 3D gerou modelos precisos em escala 1:1 das fraturas. Estes modelos ajudaram a subdividir as fraturas em sete tipos com base nos planos geométricos do planalto tibial. As abordagens cirúrgicas e as operações simuladas, incluindo a redução da fratura e a colocação de placa, foram planejadas utilizando estes modelos. Resultados: Os modelos 3D representaram com precisão a direção e a extensão da deslocação da fratura e do colapso do planalto. Os modelos facilitaram o planejamento pré-operatório, viabilizando estratégias de reconstrução precisas e a correspondência dos detalhes intraoperatórios com os modelos pré-impressos. Após a cirurgia, a estrutura anatômica do planalto tibial melhorou significativamente em todos os 54 casos. Conclusão: A impressão 3D ajuda na classificação e no planejamento pré-operatório de fraturas complexas do planalto tibial, melhorando os resultados cirúrgicos e a restauração anatômica. Nível de Evidência IV, Estudo Prospectivo.

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PURPOSE: Classifying tibial plateau fractures is paramount in determining treatment regimens and systemizing decision making. The original AO classification described by Müller in 1996 and the Schatzker classification of 1970 are the most cited classifications for tibial plateau fractures, demonstrating substantial to almost perfect agreement. The main problem with these classifications schemes is that they lack the detail required to convey the variety of fracture patterns encountered. In 2018, the AO foundation published a new classification system for proximal tibia fractures, highlighting a more complete and detailed number of categories and subcategories. We sought to independently determine inter and intraobserver agreement of the AO classification system, compared to the previous systems described by Müller and Schatzker. METHODS: One hundred seven consecutive tibial plateau fractures were screened, and a representative data set of 69 was created. Six independent evaluators (three knee surgeons, three senior orthopedic residents) classified the fractures using the original AO, the Schatzker and the new AO classifications. After six weeks, the 69 cases were randomized and reclassified by all evaluators. The Kappa coefficient (k) was calculated for inter- and intraobserver correlation and is expressed with 95% confidence intervals. RESULTS: interobserver agreement was moderate for all three classifications. k = 0.464 (0.383-0.560) for the original AO; k = 0.404 (0.337-0.489) for Schatzker; and k = 0.457 (0.371-0.545) for the base categories of the new AO classification. The inclusion of subcategories and letter modifiers to the new classification worsened agreement to k = 0.358 (0.302-0.423) and k = 0.174 (0.134-0.222), respectively. There were no significant differences between knee surgeons and residents for the new classification. Intra-observer correlation was also moderate for each of the scores: k = 0.630 (0.578-0.682) for the original AO; k = 0.623 (0.569-0.674) for Schatzker; and k = 0.621 (0.566-0.678) for the new AO base categories; without differences between knee surgeons or residents. CONCLUSIONS: This study demonstrated an adequate inter and intra-observer agreement for the new AO tibial plateau fractures classification system for its base categories, but not at the subcategory or letter modifier levels.

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Las fracturas de meseta tibial compleja se asocian a traumatismo de alta energía, principalmente en accidentes de motocicleta, siendo un desafío para el cirujano ortopedista. En la década de 1970, Schatzker propuso una clasificación radiológica para las fracturas de la meseta tibial, que destacaba la morfología de los seis tipos principales. Las imágenes de tomografía computarizada y tridimensional, han cambiado la comprensión y el tratamiento de las fracturas de la meseta tibial. Recientemente, esa clasificación original se complementó con una más amplia; puesto que, se introdujo el fragmento en cuña dividida y la continuidad de la columna posterior como determinantes de la estabilidad articular y el papel fundamental que desempeña en el tratamiento de las fracturas de la meseta tibial, con ellos también la importancia de abordajes quirúrgicos que permitan la visualización posterior para una adecuada reducción. El estudio documenta las técnicas de fijación interna y abordajes posteriores realizadas en el IAHULA, valorando los resultados clínicos en cuanto a dolor y satisfacción del paciente, como consolidación, pseudoartrosis o falla en la técnica de osteosíntesis realizada. El resultado a partir de las escalas de evaluación de la AO y KOOS, arrojaron que, con un efecto excelentes se agrupa un 28,6% y bueno a un 42,9%, indicando la importancia de la fijación de la columna posterior, para prevenir artrosis postraumática temprana e inestabilidad articular(AU)

A complex fracture of the posterior tibial plateau are related to high energy traumatisms, mainly during motorcycle accidents, becoming a challenge to the ortopedic surgen. During the seventies, Stchatzker proposed a radiologic classification for the tibial plateau fractures that pointed the morphology of six main types. The computarized and tridimensional tomographic images have changed the comprehension and treatment of these fractures. Recently, the original classification was complemented with a more broaded approach due to the introduction of the fragment in divided crib and the continuity of the posterior column as factors determining the articular stability and the fundamental roll played in the treatment of fractures of the tibial plateau, as well as the important roll of surgical approaches that allow the posterior visualization for a correct reduction. This research documents the technics of internal fixation and posterior approach developed in the IAHULA, evaluating the clinic results about patients' pain level and comfort, as well as the radiologic findings of consolidation, pseudoarthrosis, or fail in the technic of osteosynthesis developed. The results from a point of view of the evaluation scales of the AO and KOOS, show 28.6% with excellent outcomes, and 42.9% with good outcomes, indicating the importance of the fixation of the posterior column to prevent early start of posttraumatic arthrosis and articular instability(AU)

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Objetivo. Analizar el rendimiento biomecánico de las placas de tibia proximal utilizadas en fracturas de platillos tibiales evaluado a través de modelos de elementos finitos. Métodos. Se realizará una búsqueda exhaustiva en PubMed/Medline, Embase, Lilacs, Web of Science y Google Scholar. No se utilizará ninguna restricción de idioma o estado de publicación. Dos revisores examinarán de forma independiente los posibles artículos elegibles, de acuerdo con los criterios de selección predefinidos. Se incluirán los estudios que evalúen el rendimiento de los platillos tibiales proximales utilizados en las fracturas del platillo tibial evaluadas mediante el análisis de elementos finitos. La extracción de datos sobre las características del estudio, los métodos, los resultados y la evaluación del riesgo de sesgo se realizará mediante un formulario estandarizado. Considerando el diseño de estudio no se requiere evaluación por comité de ética. Los resultados de esta revisión se difundirán a través de la publicación en revistas revisadas por pares, redes sociales y congresos de la especialidad. Se espera que los resultados de esta revisión permitan optimizar los resultados del manejo quirúrgico de las fracturas de platillos tibiales. Número de registro PROSPERO: CRD42023396015.

Objetive. To analyze the biomechanical performance of proximal tibial plates used in tibial plate fractures evaluated through finite element modeling. Methods. A comprehensive search will be conducted in PubMed/Medline, Embase, Lilacs, Web of Science, and Google Scholar. No language or publication status restrictions will be used. Two reviewers will independently review potential eligible articles according to predefined selection criteria. Studies evaluating the performance of proximal tibial splints used in tibial splint fractures assessed by finite element analysis will be included. Data extraction on study characteristics, methods, results, and risk of bias assessment will be performed using a standardized form. Considering the study design, evaluation by an ethics committee is not required. The results of this review will be disseminated through publication in peer-reviewed journals, social networks and specialty congresses. It is expected that the results of this review will allow optimizing the results of the surgical management of tibial plate fractures. PROSPERO registration number: CRD42023396015.

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RESUMEN Introducción: la artropatía enteropática representa una manifestación derivada de complicaciones inflamatorias intestinales. Presentación del caso: paciente de 53 años de edad, de piel blanca, femenina, que sufrió caída de sus pies, con trauma en rodilla izquierda que le ocasionó fractura de meseta tibial izquierda. Discusión: los estudios radiológicos fueron positivos y confirman el diagnóstico de la artropatía enteropática y fractura de platillos tibiales, se aplicaron pautas de tratamientos integradores funcionales. Conclusiones: con los tratamientos el paciente reportó efectos beneficiosos, se lograron los objetivos propuestos en la rehabilitación, así como la incorporación de la paciente a la sociedad con un mínimo de discapacidad e independencia.

ABSTRACT Introduction: enteropathic arthropathy represents a manifestation derived from intestinal inflammatory complications. Case presentation: 53-year-old white-skinned female patient who suffered a fall from her feet, with trauma to the left knee that caused a fracture of the left tibial plateau. Discussion: the radiological studies were positive and confirm the diagnosis of enteropathic arthropathy and tibial plateau fractures, functional integrative treatment guidelines were applied. Conclusions: with the treatments the patient reported beneficial effects, the objectives proposed in the rehabilitation were achieved, as well as the incorporation of the patient into society with a minimum of disability and independence.

RESUMO Introdução: a artropatia enteropática representa uma manifestação derivada de complicações inflamatórias intestinais. Apresentação do caso: Paciente do sexo feminino, 53 anos, branca, que sofreu queda dos pés, com trauma no joelho esquerdo que ocasionou fratura do platô tibial esquerdo. Discussão: os estudos radiológicos foram positivos e confirmam o diagnóstico de artropatia enteropática e fraturas do planalto tibial, foram aplicadas diretrizes de tratamento integrativo funcional. Conclusões: com os tratamentos o paciente relatou efeitos benéficos, os objetivos propostos na reabilitação foram alcançados, bem como a incorporação do paciente à sociedade com um mínimo de incapacidade e independência.

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PURPOSE: The aim of this study is to compare the biomechanical behavior of three different fixation constructions currently used for buttressing the posteromedial shearing tibial plateau fragment. Our hypothesis is that non-locked implants provide sufficient comparable stability in posteromedial tibial plateau fractures as locked implants. METHODS: Fifteen left synthetic tibiae from a single manufacturing batch were used to create a posteromedial shear tibial plateau fracture. The fracture was buttressed with three different posteriorly placed five-hole straight small-fragment plate. Five models were fixed with a one-third tubular plate (TTP), five models with a dynamic compression plate (DCP), and five models with a locking compression plate (LCP). All groups were tested to vertical subsidence (Stage 1). In the same experiment (Stage 2), TTP and DCP groups were tested until catastrophic failure. Force versus displacement curves were obtained in the two stages of the experiment. RESULTS: Stage 1 - There was no significant difference in stiffness (p = 0.89), subsidence up to 2 mm (p = 0.38), and energy (p = 0.36) among the three fixation constructions. Stage 2 - Yield load revealed significantly less yield strength for the TTP group as compared with the DCP group (p = 0.048). However, there was no significant difference in maximum load to failure among the TTP and DCP fixation constructions (p = 0.16). CONCLUSION: Placement of either a locked or non-locked small fragment straight plate to buttress the posteromedial shear tibial plateau fragment has a similar biomechanical behavior. When the implant is positioned to buttress the shearing fragment it maximizes biomechanical stiffness.

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Introducción Este trabajo propone el concepto de criterio apropiado en el tratamiento quirúrgico de las fracturas de platillos tibiales compuesto por 10 elementos. Dentro de estos se incluye el abordaje, la calidad de la reducción, la estabilidad de la fijación y el tiempo para la fijación, entre otros. El estudio busca correlacionar el puntaje de esta escala propuesta con la escala funcional descrita por Rasmussen. Materiales y métodos Estudio tipo cohorte retrospectiva que incluye los pacientes con fracturas de platillos tibiales tratadas quirúrgicamente entre enero de 2013 y junio de 2017. Se registraron variables demográficas, las variables de interés para establecer el criterio apropiado y el resultado funcional con la escala de Rasmussen. Resultados 75 pacientes fueron incluidos, logrando seguimiento mínimo de 6 meses en 89% (n=67). La mediana para edad fue 39 años y el predominio masculino (56.7%). La etiología principal fue accidente de tránsito en moto (67%). En 78% se presentó compromiso de alguna columna posterior. El tratamiento fue apropiado en 61% de los casos, mientras 89% tuvieron resultado bueno o excelente en la escala de Rasmussen. La correlación fue lineal y estadísticamente significativa entre el criterio apropiado y la escala funcional de Rasmussen, correlación Pearson: 0.6279 (p<0.001). Discusión El concepto de criterio apropiado puede ser aplicado en la toma de decisiones y planeamiento quirúrgico de las fracturas de platillos tibiales. Sus buenos resultados se asocian con mejores resultados en la escala de Rasmussen y mayor satisfacción para el paciente.

Background This study presents the use of benchmark criteria for the surgical treatment of tibial plateau fractures. It has 10 elements, including: quality of fracture reduction, fixation stability, time elapsed to fixation, among others. The purpose of the study is to correlate the benchmark criteria used with Rasmussen's functional score system. Materials and methods A retrospective cohort study that included patients with a tibial plateau fracture that required surgical treatment between January 2013 and June 2017. Baseline characteristics, outcomes related with the benchmark criteria, and Rasmussen's score variables, were registered. Results A total of 75 patients were included, with a 6-months minimum follow-up for 89% (n=67). The median age was 39 years old, and the majority (56.7%) were men. The first cause of fracture was motorcycle accident (67%). There was compromise of a posterior column in 78% of the cases. Treatment was considered appropriate in 61%, and 89% had a good/excellent result in Rasmussen's functional score. There was a significant linear correlation between the benchmark criteria and Rasmussen's score, with a Pearson correlation coefficient of 0.6279 (P<.001). Discussion Benchmarking criteria may be useful in the evaluation and planning of surgical treatment of tibial plateau fractures. They are associated with better functional results and satisfaction in the Rasmussen's score.

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Las fracturas de platillos tibiales son lesiones complejas que incluyen una variedad de patrones morfológicos cada vez mejor caracterizados en la literatura. Históricamente, los esquemas de clasificación se han basado en evaluar los rasgos de fractura en el plano frontal y las técnicas quirúrgicas en lograr la fijación de esos fragmentos, sin tomar en consideración el compromiso óseo que ocurre en la región posterior de los platillos tibiales. Con el advenimiento de la clasificación columnar basada en tomografía computada, se han logrado desarrollar estrategias de fijación optimizada, dando cada vez más relevancia a la columna posterior. Este artículo realiza una revisión extensa de la literatura, otorgando los fundamentos quirúrgicos que explican la importancia del tratamiento específico de la columna posterolateral y posteromedial, con el fin de restablecer la biomecánica normal de la rodilla y el razonamiento quirúrgico de las diversas vías de abordaje específicas para una reducción y osteosíntesis satisfactoria de esos fragmentos.

Tibial plateau fractures are complex injuries which include a variety of morphological patterns that have been increasingly better characterized in the literature. Historically, classifications have focused on description of fracture patterns in the frontal plane, while surgical techniques have focused on reduction of these fragments not considering the osseous defects that occur on the posterior region of the tibial plateau. With new CT scan column based classifications, strategies to optimize fixation have been developed, giving relevance to the posterior column. This article is an exhaustive review of the literature, providing the surgical foundations that explain the importance of specific treatment of the posterolateral and posteromedial column, aiming to restore normal knee biomechanics. Furthermore, this article provides the diverse specific surgical approaches rationale for a satisfactory open reduction and internal fixation of these fragments.

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OBJETIVO: Presentar un caso de complicación de fractura de platillos tibiales Schatzker VI y su manejo quirúrgico. MATERIAL Y MÉTODO: Se presenta un caso de fractura de platillos tibial Schatzker VI que evoluciona con malalineamiento en valgo secundario a hundimiento del platillo tibial, junto a una revisión de la literatura y la descripción del manejo quirúrgico. RESULTADOS: Se realizó una osteotomía en cuña de cierre medial de tibia proximal y se estabilizó con placa bloqueada (TomoFix), con una corrección completa de la deformidad sin complicaciones. Discusión: La osteotomía en cuña de cierre medial en tibia proximal es una técnica descrita en el manejo de artrosis secundaria a malalineamiento en valgo de la rodilla. Mediante dos osteotomías iniciadas por la cortical medial hacia la lateral con un fulcro esa última, se retira una cuña de dimensiones conocidas y se mantiene la reducción con algún elemento de osteosíntesis. De esa forma, se permite la corrección angular de la deformidad, previamente planificada. Los resultados en distintas series son en general favorables. CONCLUSIÓN: El malalineamiento de la extremidad posterior a una fractura de platillos tibiales y la consecuente sobrecarga del compartimento afectado en la rodilla, asociado al daño articular, evoluciona con degeneración articular que termina en una artrosis unicompartimental secundaria, la cual puede ser prevenida con el uso de osteotomías correctoras de ejes como la osteotomía de tibia proximal, permitiendo normalizar la distribución de las cargas en los compartimentos mediante la corrección del eje mecánico alterado y así prolongar la sobrevida articular.

OBJECTIVE: To present a Schatzker VI tibial plateau fracture case complication and its surgical management METHODS: We present a case of tibial plateau fracture, type VI according to Schatzkeŕs classification, that developed limb malalignment secondary to tibial plateau depression resulting in a genu valgum deformity, along with a literature review and a brief description of the surgical technique. Results: High tibial medial closing wedge osteotomy, stabilized with locking plate (tomoFix) was performed, with a complete correction of the deformity without complications. DISCUSSION: High tibial medial closing wedge is a known procedure used in the management of valgus knee malalignment secondary osteoarthritis. By means of two osteotomies made from medial to lateral cortices, using the latter as a fulcrum, a wedge with known dimensions is subtracted and reduction is maintained with some osteosynthesis element. In this fashion, it allows the previously planned angular correction. Results in different reports are mostly favorable. CONCLUSION: The malalignment of the limb after a tibial plateau fracture and the consequent overload of the affected knee compartment; associated with joint damage, evolves in joint degeneration and eventually, in a secondary unicompartmental osteoarthritis. This can be avoided with the use of corrective osteotomies such as the proximal tibial osteotomy, which allows a proper distribution of loads in the compartments by correcting the altered mechanical axis and thus, prolonging joint survival.

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PURPOSE: A four-column classification system offers a different way of evaluating tibial plateau fractures. The aim of this study is to compare the intra-observer and inter-observer reliability between four-column and classic classifications. METHODS: This is a reliability study, which included patients presenting with tibial plateau fractures between January 2013 and September 2015 in a level-1 trauma centre. Four orthopaedic surgeons blindly classified each fracture according to four different classifications: AO, Schatzker, Duparc and four-column. Kappa, intra-observer and inter-observer concordance were calculated for the reliability analysis. RESULTS: Forty-nine patients were included. The mean age was 39 ± 14.2 years, with no gender predominance (men: 51%; women: 49%), and 67% of the fractures included at least one of the posterior columns. The intra-observer and inter-observer concordance were calculated for each classification: four-column (84%/79%), Schatzker (60%/71%), AO (50%/59%) and Duparc (48%/58%), with a statistically significant difference among them (p = 0.001/p = 0.003). Kappa coefficient for intr-aobserver and inter-observer evaluations: Schatzker 0.48/0.39, four-column 0.61/0.34, Duparc 0.37/0.23, and AO 0.34/0.11. CONCLUSIONS: The proposed four-column classification showed the highest intra and inter-observer agreement. When taking into account the agreement that occurs by chance, Schatzker classification showed the highest inter-observer kappa, but again the four-column had the highest intra-observer kappa value. The proposed classification is a more inclusive classification for the posteromedial and posterolateral fractures. We suggest, therefore, that it be used in addition to one of the classic classifications in order to better understand the fracture pattern, as it allows more attention to be paid to the posterior columns, it improves the surgical planning and allows the surgical approach to be chosen more accurately.

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OBJETIVO: Caracterizar a importância da Ressonância Nuclear Magnética (RNM) como método de investigação pré-operatória nas fraturas do planalto tibial, tratando de correlacionar o padrão de lesão óssea, classificado de acordo com os critérios de Schatzker, com a ocorrência de lesões ligamentares e meniscais. MÉTODOS: Foram avaliados as imagens de 25 pacientes com fraturas do planalto tibial, estudando a correlação entre lesões ósseas e de partes moles. Estabeleceu-se uma correlação entre a classificação de Schatzker e os achados de RNM. RESULTADOS: As lesões meniscais foram diagnosticadas em 96 por cento dos casos e as lesões ligamentares foram encontradas em 44 por cento dos pacientes. Houve correlação entre o tipo de fratura, segundo a classificação de Schatzker, e as lesões meniscais e/ ou ligamentares encontradas na RNM. As fraturas do tipo I e do tipo II de Schatzker apresentaram lesão do menisco lateral em 71,4 por cento e 83,3 por cento dos casos, respectivamente. Nas fraturas clas- sificadas como Schatzker tipo IV encontramos lesões de um ou mais ligamentos na RNM pré-operatória em 75 por cento dos pacientes. CONCLUSÃO: A RNM é um exame que agrega informações importantes para o entendimento da magnitude do dano em fraturas do planalto tibial, auxiliando no planejamento e tomada de decisões no tratamento destas lesões. Os autores recomendam, portanto, a incorporação da RNM no protocolo de avaliação pré-operatória das fraturas do planalto tibial.

OBJECTIVE: The aim of this study was to emphasize the role of Magnetic Resonance Image (MRI) as an adjuvant diagnostic tool for tibial plateau fractures, concerning the establishment of a relationship between bone fracture patterns and ligament and/ or menisci injuries. METHODS: Evaluation of image database of 25 patients victims of tibial plateau fractures. A correlation between bone and soft tissues has been established, based on Schatzker classification for tibial plateal fractures. RESULTS: 96 percent of these patients presented with associated menisci in- juries and 44 percent of them were diagnosed with associated liga- ment injuries. A correlation was established between fracture pattern, according to Schatzker classification, and soft tissue lesions detected by MRI. Fractures types I and II of Schatzker had association with lateral meniscus injury in 71,4 percent and 83,3 percent, respectively. Fractures of medial tibial plateau (Schatzker IV) were associated with ligament injuries in 75 percent of the cases. CONCLUSIONS: The authors conclude that MRI is a valuable and recommendable diagnostic method, enhancing the understanding of the injury and supporting preoperative planning and decision-making.

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OBJETIVO: Apresentar os resultados preliminares com técnicas de abordagem posterior para fraturas do platô tibial, com traço de cisalhamento no plano sagital. MÉTODOS: Doze pacientes com fraturas do platô tibial tratados cirurgicamente através de um acesso posterior direto foram incluídos no estudo. Foram revisados os prontuários, as radiografias e tomografias dos pacientes bem como as avaliações clínicas. Todos os casos foram acompanhados até o momento da consolidação óssea, definido como aquele em que o paciente apresentava sinais radiográficos compatíveis sendo capaz de apoiar carga total sobre o membro sem referir dor. RESULTADOS: Entre julho de 2009 e abril de 2010, foram atendidos em nosso serviço 89 pacientes com fraturas da extremidade proximal da tíbia. Desses, 80 (89,9 por cento) foram tratados cirurgicamente. Doze pacientes (13,6 por cento) apresentavam uma fratura com um componente de cisalhamento posterior e, portanto, foram submetidos a abordagens posteriores para redução e fixação da fratura. Em três destes casos associou-se uma abordagem antero-lateral. A média de idades dos pacientes foi de 35 anos. O acompanhamento médio foi de 12 meses (entre 8 e 23 meses). As fraturas foram classificadas de acordo com o sistema AO/OTA: cinco como 41 B1, quatro como 41 B3, duas como 41 C1 e uma como 41 C3. Dentre as complicações, tivemos uma deiscência de sutura, tratada com curativos, e uma perda de redução que necessitou de uma reoperação. Em nenhum caso ocorreu lesão neurovascular, retarde de consolidação, pseudartrose ou instabilidade articular residual. Em 4 casos a redução foi considerada ruim (> 2mm de degrau articular), em 5 casos foi considerada imperfeita (< 2 mm de degrau articular) e em 3 casos obtivemos uma redução anatômica. CONCLUSÃO: Os autores concluem que o uso da abordagem posterior deve ser considerada em casos de fraturas com onde haja componente de cisalhamento posterior do planalto da tíbia. Uma casuística ampliada é necessária para avaliar o real benefício desta abordagem.

OBJECTIVE: To describe our preliminary results of posterior shearing tibia plateau fractures treated by a direct dorsal approach and plate fixation. METHODS: A consecutive series of twelve patients with tibia plateau fractures treated by direct posterior approach was selected from our database. Conventional radiographies, computed tomography scans and medical records were reviewed. All cases were followed to union, as defined by painless weight bearing and radiographic healing. RESULTS: Between July 2009 and April 2010, our trauma service received 89 tibia plateau fractures and treated 80 (89,9 percent) operatively. Twelve patients (13,5 percent) sustained posterior shearing tibia plateau fractures. All fractures were treated through the posterior approach, although 3 required association with an anterolateral approach as well. The mean age of patients was 35 years and mean follow-up was 12 (range 8-23) months. The fractures were classified according to AO/OTA: five 41 B1, four 41 B3, two 41 C1 and one 41 C3. There was one wound dehiscence, managed with local wound care, and one loss of reduction treated by reoperation. No patient sustained neurovascular injury, nonunion, malunions or knee instability. In four cases the reduction was rated as poor (> 2 mm step off), in five cases reduction was rated as imperfect (<2 mm step off) and in three cases the reduction was rated as anatomic (absolutely no step-off). CONCLUSION: Authors conclude that posterior approaches should be considered when tibial plateau fractures result in posterior displaced fragments. A larger sample is needed to get definitive conclusions.

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