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Background: The medial knee structures have a primary role in stabilizing valgus and rotational stress, which makes them important in assessing the ligament-injured knee globally and choosing the most adequate treatment. Purpose: To conduct a layer-by-layer dissection of the knee's anteromedial side and provide a qualitative and quantitative description of the anatomy and histology of a ligament in the anteromedial region of the knee, which we have termed the anterior oblique ligament (AOL). Also, to describe the AOL relationship with what we have termed the medial cross-a ligament complex that stabilizes the medial pivot. Study Design: Descriptive laboratory study. Methods: A total of 35 fresh-frozen knees from transfemoral amputations that were exclusively performed for vascular reasons were dissected. Structures were identified after meticulous dissection, respecting the same protocol, measured with a digital caliper rule, and histologically studied for data. Results: The AOL was found in all dissected knees, with a mean length of 31.47 ± 5.06 mm. This structure presented a ligament histology with densely organized collagen fibrils. The medial cross was represented by the superficial medial collateral ligament, AOL (anterior region), and posterior oblique ligament. Conclusion: This study demonstrated the presence of a ligament in the anteromedial region of the knee, termed the AOL. This structure was in the anterior part of a ligament complex-the medial cross. Clinical Relevance: Studying and revisiting the medial compartment can provide important information for understanding joint instability and promoting better results in ligament reconstructions.

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El Ligamento Colateral Medial Superficial y otros estabilizadores estáticos de la rodilla, como el fascículo profundo del LCM y el Ligamento Posterior Oblicuo, presentan una alta frecuencia de lesiones, comprometiendo principalmente a la población joven y deportista. El mecanismo lesional suele involucrar un movimiento de valgo forzado, rotación externa en flexión o semiflexión de rodilla o combinación de ambos, que pueden ser producto de actividades como el ski, patinaje y fútbol. El trabajo se realizó en pacientes del Hospital Clínicas y particulares desde enero 2017 a diciembre 2018, como muestra se tiene a 11 pacientes internados con el diagnostico de Inestabilidad medial crónica de rodilla ; se escogieron mediante un muestro no probabilístico. Investigación de tipo comparativo, observacional, longitudinal, prospectivo , se realizó un seguimiento de 6 a 1 año post quirúrgico en paciente que se sometieron a la reconstrucción anatómica monofascicular con injerto autólogo semitendinoso monofascicular. Cumplían los criterios de inclusión 11 pacientes. El 95 % de los pacientes fueron hombres . Pacientes operados con injerto autólogo semitendinoso con reconstrucción anatómica , teniendo resultados del 92%Grado A y B escala objetiva IKDC post quirúrgica. Los resultados de este estudio demuestran la efectividad , sencillez de reproducir la técnica empleada en estabilizar la rodilla en casos de lesiones crónicas grado III del LCMs y el LPO

The superficial medial collateral ligament and other static stabilizers of the knee, such as the LCM deep fasciculus and the oblique posterior ligament, present a high frequency of injuries, compromising mainly the young population and athletes. The mechanism of injury usually involves forced valgus movement, external rotation in knee flexion or semi-flexion, or a combination of both, which may be the result of activities such as skiing, skating and soccer. The work was carried out in patients of the Hospital Clínicas and private from January 2017 to December 2018, as sample shows 11 patients interned with the diagnosis of chronic medial instability of the knee; they were chosen through a non-probabilistic sampling. Comparative, observational, longitudinal, prospective research was carried out 6 to 1 year post-surgical follow-up in a patient who underwent monofascicular anatomic reconstruction with monofascicular semitendinosus autologous graft. 11 patients met the inclusion criteria. 95% of the patients were men. Patients operated with autologous semitendinous graft with anatomical reconstruction, having 92% Grade A and B results after IKDC objective scale. The results of this study demonstrate the effectiveness, simplicity of reproducing the technique used to stabilize the knee in cases of chronic injuries grade III of LCMs and LPO.

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BACKGROUND: The purpose of this study was to compare the combined reconstruction of the superficial medial collateral ligament (sMCL) and the posterior oblique ligament (POL) with the reconstruction of the sMCL associated with the advancement of the posteromedial capsule in a complex knee injury scenario. We hypothesized that both techniques would present similar knee stability and failure rates. METHODS: This is a retrospective case-control study designed to compare the results of the two reported techniques for grade III MCL instability. Patients undergoing MCL reconstruction associated with anterior cruciate ligament, posterior cruciate ligament, or both, from 2010 to 2019, were included. The following parameters were evaluated: demographic data, type of graft, time from injury to surgery, associated meniscus injuries, follow up time, mechanism of trauma, postoperative objective IKDC, subjective IKDC and Lysholm scales, range of motion, reconstruction failure and complications. RESULTS: Seventy-eight patients were evaluated, 37 of whom underwent reconstruction of the sMCL and POL, and 41 of whom underwent reconstruction of the sMCL with advancement of posteromedial structures. There was no difference in any preoperative variable. Patients undergoing reconstruction of the sMCL + advancement had greater loss of flexion (Group 1 3.4 ± 4.6 vs Group 2 8.4 ± 7.9; P = 0.002) and more individuals with flexion loss greater than 10° (Group 1, seven patients (18.9%) vs Group 2, 17 patients (41.5%); P = 0.031). Postoperative knee stability, failures and complications were similar between groups. CONCLUSION: Both techniques presented good functional results and low rates of complications. However, the advancement technique showed greater flexion loss, which should be considered when choosing the best surgical option.

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Objective To describe all ligamentous, capsular, tendinous and bone landmarks structures of the medial region of the knee, as well as a new ligamentous structure identified in a series of anatomical dissections of cadaveric specimens. Methods Twenty cadaver knees were dissected to study the medial compartment. The main structures of this region were identified during dissection. The morphology of the structures and their relationship with known anatomical parameters were determined both qualitatively and quantitatively. The collected data were analyzed and interpreted using descriptive statistics. Results In the dissection of all specimens, all ligamentous structures previously described in the anatomical study of the medial part of the knee were identified, and objective measures that can help as parameters for surgical ligament reconstruction were identified. When dissecting the medial collateral ligament, a bony prominence immediately distal to its proximal tibial insertion was observed and described, as well as a bursa below the ligament, in which it was not inserted. We also described a ligamentous structure with extracapsular location, originated anteriorly to the medial epicondyle and following obliquely towards the tibia. These structures were named, respectively, interinsertional tubercle, interinsertional bursa and anterior oblique ligament. Conclusion In addition to the description and measurement of the structures and parameters already existing in the anatomical study of the medial part of the knee, it was possible to describe three new structures not yet described in the literature: the interinsertional tubercle, the interinsertional bursa, and the anterior oblique ligament. These structures were found in all dissections performed.

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Abstract Objective To describe all ligamentous, capsular, tendinous and bone landmarks structures of the medial region of the knee, as well as a new ligamentous structure identified in a series of anatomical dissections of cadaveric specimens. Methods Twenty cadaver knees were dissected to study the medial compartment. The main structures of this region were identified during dissection. The morphology of the structures and their relationship with known anatomical parameters were determined both qualitatively and quantitatively. The collected data were analyzed and interpreted using descriptive statistics. Results In the dissection of all specimens, all ligamentous structures previously described in the anatomical study of the medial part of the knee were identified, and objective measures that can help as parameters for surgical ligament reconstruction were identified. When dissecting the medial collateral ligament, a bony prominence immediately distal to its proximal tibial insertion was observed and described, as well as a bursa below the ligament, in which it was not inserted. We also described a ligamentous structure with extracapsular location, originated anteriorly to the medial epicondyle and following obliquely towards the tibia. These structures were named, respectively, interinsertional tubercle, interinsertional bursa and anterior oblique ligament. Conclusion In addition to the description and measurement of the structures and parameters already existing in the anatomical study of the medial part of the knee, it was possible to describe three new structures not yet described in the literature: the interinsertional tubercle, the interinsertional bursa, and the anterior oblique ligament. These structures were found in all dissections performed.

Resumo Objetivo Descrever todas as estruturas ligamentares, capsulares, tendinosas e marcos ósseos da região medial do joelho, assim como uma nova estrutura ligamentar identificada em uma série de dissecções anatômicas de espécimes cadavéricos. Métodos Vinte joelhos de cadáveres foram dissecados para estudar o compartimento medial. As principais estruturas dessa região foram identificadas durante a dissecção. A morfologia das estruturas e sua relação com parâmetros anatômicos conhecidos foram determinados tanto de forma qualitativa quanto de forma quantitativa. Os dados coletados foram analisados e interpretados por meio de estatística descritiva. Resultados Na dissecção de todos os espécimes, foram identificadas todas as estruturas ligamentares já descritas anteriormente no estudo anatômico da porção medial do joelho, e foram realizadas medidas objetivas que podem auxiliar como parâmetros para a reconstrução ligamentar cirúrgica. Foram observados e descritos, ainda, ao se desprender o ligamento colateral medial superficial, uma proeminência óssea imediatamente distal à sua inserção tibial proximal, uma bursa abaixo do ligamento, na qual o mesmo não se mostrava inserido, assim como uma estrutura ligamentar localizada extracapsularmente e com origem na face anterior do epicôndilo medial, seguindo obliquamente em direção à tíbia, aos quais foram dados os nomes, respectivamente, de tubérculo interinsercional, bursa interinsercional e ligamento oblíquo anterior. Conclusão Além da descrição e medida das estruturas e parâmetros já existentes no estudo anatômico da porção medial do joelho, foi possível a descrição de três novas estruturas: o tubérculo interinsercional a bursa interinsercional e o ligamento oblíquo anterior, ainda não descritos na literatura. Essas estruturas foram encontradas em todas as dissecções realizadas.

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INTRODUCTION: The medial collateral ligament (MCL) is one of the main stabilizers of the knee, but its injury occurs in conjunction with other ligaments. OBJECTIVE: To determine the prevalence of MCL lesions by magnetic resonance imaging, their degrees and associated lesions in our institution. MATERIAL AND METHODS: Retrospective study from January to April 2018 where KNEE MRIs were evaluated where the MCL lesion was presented to evaluate the degree and type of associated injuries. RESULTS: We included 368 studies, prevalence of isolated MCL lesion of 3.07%, grade I and grade II, prevalence of concomitant MCL lesions was 17.66% grade I (75%), grade II (15%) and grade III (3%). Associated injuries were medial meniscus injury (46.15%), anterior cruciate ligament injury (30.7%), isolated bone contusion (18.46%), chodral injuries (37.58%), medial vastus injury (14.51%), patellar medial retinacular injury (14.51%), vastus lateral injury (9.23%), posterior cruciate ligament injury (6.15%), lateral meniscus injury (4.61%), iliotibial band tenosynovitis (4.61%), medial facet avulsion fracture (3.07%), Pes Anserine tenosynovitis (3.07%). CONCLUSION: Prevalence of 17.66% of the MCL injuries in our hospital by magnetic resonance, the first 2 degrees predominate, with a wide spectrum of associated knee injuries.

INTRODUCCIÓN: El ligamento colateral medial (LCM) es uno de los principales estabilizadores de la rodilla, pero su lesión se presenta en conjunto con otras lesiones ligamentarias. OBJETIVO: Determinar la prevalencia de lesiones del LCM por resonancia magnética, sus grados y lesiones asociadas en nuestra institución. MATERIAL Y MÉTODOS: Estudio retrospectivo de Enero a Abril de 2018, se evaluaron resonancias magnéticas de rodilla donde se presentó lesión del LCM para evaluar grado y tipo de lesiones asociadas. RESULTADOS: Se incluyeron 368 estudios, prevalencia de lesión aislada del LCM de 3.07%, una grado I y una grado II, la prevalencia de lesiones de LCM concomitantes fue de 17.66%, grado I (75%), grado II (15%) y grado III (3%). Las lesiones asociadas fueron lesión del menisco medial (46.15%), lesión del ligamento cruzado anterior (30.7%), contusión ósea aislada (18.46%), lesiones condrales (37.58%), lesión de vasto medial (14.51%), lesión del retináculo medial patelar (14.51%), lesión del vasto lateral (9.23%), lesión del ligamento cruzado posterior (6.15%), lesión del menisco lateral (4.61%), tenosinovitis banda iliotibial (4.61%), fractura de avulsión de la faceta medial (3.07%), tenosinovitis de la Pes Anserinus (3.07%). CONCLUSIÓN: Prevalencia de 17.66% de lesiones del LCM en nuestro hospital por resonancia magnética, predominan los dos primeros grados con un espectro amplio de lesiones asociadas de la rodilla.

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Resumen: Introducción: El ligamento colateral medial (LCM) es uno de los principales estabilizadores de la rodilla, pero su lesión se presenta en conjunto con otras lesiones ligamentarias. Objetivo: Determinar la prevalencia de lesiones del LCM por resonancia magnética, sus grados y lesiones asociadas en nuestra institución. Material y métodos: Estudio retrospectivo de Enero a Abril de 2018, se evaluaron resonancias magnéticas de rodilla donde se presentó lesión del LCM para evaluar grado y tipo de lesiones asociadas. Resultados: Se incluyeron 368 estudios, prevalencia de lesión aislada del LCM de 3.07%, una grado I y una grado II, la prevalencia de lesiones de LCM concomitantes fue de 17.66%, grado I (75%), grado II (15%) y grado III (3%). Las lesiones asociadas fueron lesión del menisco medial (46.15%), lesión del ligamento cruzado anterior (30.7%), contusión ósea aislada (18.46%), lesiones condrales (37.58%), lesión de vasto medial (14.51%), lesión del retináculo medial patelar (14.51%), lesión del vasto lateral (9.23%), lesión del ligamento cruzado posterior (6.15%), lesión del menisco lateral (4.61%), tenosinovitis banda iliotibial (4.61%), fractura de avulsión de la faceta medial (3.07%), tenosinovitis de la Pes Anserinus (3.07%). Conclusión: Prevalencia de 17.66% de lesiones del LCM en nuestro hospital por resonancia magnética, predominan los dos primeros grados con un espectro amplio de lesiones asociadas de la rodilla.

Abstract: Introduction: The medial collateral ligament (MCL) is one of the main stabilizers of the knee, but its injury occurs in conjunction with other ligaments. Objective: To determine the prevalence of MCL lesions by magnetic resonance imaging, their degrees and associated lesions in our institution. Material and Methods: Retrospective study from January to April 2018 where KNEE MRIs were evaluated where the MCL lesion was presented to evaluate the degree and type of associated injuries. Results: We included 368 studies, prevalence of isolated MCL lesion of 3.07%, grade I and grade II, prevalence of concomitant MCL lesions was 17.66% grade I (75%), grade II (15%) and grade III (3%). Associated injuries were medial meniscus injury (46.15%), anterior cruciate ligament injury (30.7%), isolated bone contusion (18.46%), chodral injuries (37.58%), medial vastus injury (14.51%), patellar medial retinacular injury (14.51%), vastus lateral injury (9.23%), posterior cruciate ligament injury (6.15%), lateral meniscus injury (4.61%), iliotibial band tenosynovitis (4.61%), medial facet avulsion fracture (3.07%), Pes Anserine tenosynovitis (3.07%). Conclusion: Prevalence of 17.66% of the MCL injuries in our hospital by magnetic resonance, the first 2 degrees predominate, with a wide spectrum of associated knee injuries.

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SUMMARY: The aim of the present study was to evaluate the importance of the epiligament for the difference in the healing potential of the knee anterior cruciate and medial collateral ligament. To do so, we compared the structure of the anterior cruciate and the medial collateral ligament and evaluated the differences in the expression of collagen types I, III and V in a rat knee. We have also conducted a comparative quantitative analysis of the number of cells per mm2 in the two ligaments. Tissue samples were obtained from the anterior cruciate and medial collateral ligament of 10 knee joints taken from five 8-month-old Wistar rats. We used standard hematoxylin and eosin staining, in addition to immunohistochemical staining with monoclonal antibodies against collagen types I, III and V. A semi-quantitative analysis of the expression was made through ImageJ, while Student's T-test was used for the statistical analysis. Our results showed higher expression of all collagen types in the epiligament, compared to the ligament proper and difference in the expression between the medial collateral and the anterior cruciate ligament in favor of the first. We also reported a statistically significant difference in the number of cells per mm2 between the two ligaments and their epiligaments. Our findings show a higher number of cells and a stronger expression of certain collagen types in the epiligament of the medial collateral compared to the anterior cruciate ligament, which may be related to the difference in their healing potential.

RESUMEN: El objetivo del presente estudio fue evaluar la importancia del epiligamento para la diferencia en el potencial de curación del ligamento cruzado anterior y colateral medial de la rodilla. Comparamos la estructura del ligamento cruzado anterior y el ligamento colateral medial y evaluamos las diferencias en la expresión de los tipos de colágeno I, III y V en una rodilla de rata. También se realizó un análisis cuantitativo comparativo del número de células por mm2 en los dos ligamentos. Se obtuvieron muestras de tejido del ligamento cruzado anterior y colateral medial de 10 articulaciones de rodilla tomadas de cinco ratas Wistar de 8 meses de edad. Utilizamos tinción estándar con hematoxilina y eosina, además de tinción inmunohistoquímica con anticuerpos monoclonales contra colágeno tipo I, III y V. Se realizó un análisis semicuantitativo de la expresión mediante ImageJ, mientras que para el análisis estadístico se utilizó la prueba T de Student. Nuestros resultados mostraron una mayor expresión de todos los tipos de colágeno en el epiligamento, en comparación con el ligamento y una diferencia en la expresión entre el ligamento colateral medial y el ligamento cruzado anterior. También informamos una diferencia estadísticamente significativa en el número de células por mm2 entre los dos ligamentos y sus epiligamentos. Nuestros hallazgos muestran un mayor número de células y una expresión mayor de ciertos tipos de colágeno en el epiligamento colateral medial en comparación con el ligamento cruzado anterior, lo que puede estar relacionado con la diferencia en su potencial de curación.

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INTRODUCTION: Medial Collateral Ligament (LCM) instability is associated with multi-ligamentary lesions. There are several procedures for the reconstruction of MCL, we present a percutaneous technique of augmentation. Our goal is to describe a new technique of reconstruction of the LCM by grafting and fixing with biocomposite screws. MATERIAL AND METHODS: We present the technique in a total of 21 consecutive patients with MCL injury operated in the period of December 2011 to October 2014. Reconstruction of MCL was performed with long, tibial or long hallux tendon allografts in 18 patients and only one patient was used autograft. Eighteen of the 20 patients had associated lesions: 5 with medial meniscus injury, 8 with anterior cruciate ligament injury, (ACL), 8 with condral injury and 1 with lateral meniscus injury. CONCLUSION: The surgical technique presented is simple to perform, without damage to other structures and with a strong fixation.

INTRODUCCIÓN: La inestabilidad del ligamento colateral medial (LCM) se asocia con lesiones multiligamentarias. Existen varios procedimientos para la reconstrucción del LCM, presentamos una técnica percutánea de aumentación. Nuestro objetivo es describir una nueva técnica de reconstrucción del LCM mediante injerto y fijación con tornillos biocompuestos. MATERIAL Y MÉTODOS: Presentamos la técnica en un total de 21 pacientes consecutivos con lesión del LCM operados en el período de Diciembre de 2011 a Octubre de 2014. La reconstrucción del LCM se realizó con aloinjertos del tendón del peroneo largo, tibial posterior o flexor largo del Hallux en 18 pacientes y solamente en un paciente se utilizó autoinjerto. De los 20 pacientes, 18 presentaron lesiones asociadas: cinco con lesión de menisco medial, ocho con lesión del ligamento cruzado anterior, (LCA), ocho con lesión condral y uno con lesión del menisco lateral. CONCLUSIÓN: La técnica quirúrgica presentada es sencilla de realizar, sin daño a otras estructuras y con una fijación resistente.

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OBJECTIVE: Physical traumas can lead to unconscious neuropsychical alterations, which can compromise rehabilitation result and functional recovery. Aim of this interventional study is to verify if neurobiological Radio Electric Asymmetric Conveyer (REAC) treatments Neuro Postural Optimization (NPO) and Tissue Optimization (TO) are able respectively to improve neuro psychomotor strategies and facilitate recovery process in medial collateral ligaments (MCL) lesions of the knee. PATIENTS AND METHODS: 45 healthy subjects, 32 males and 13 females, with knee MCL lesion, diagnosed with MRI or ultrasound. Within 4 days after the trauma, subjects were clinically evaluated (T0), both through medical and subjective assessments. Clinical evaluation was repeated after the REAC NPO treatment (T1) and at the end of 18 REAC TO treatments (T2) and at the 30 days follow-up (T3). RESULTS: In comparison with the results commonly found in clinical practice, all REAC treated patients recovered much faster. They reported functional recovery, pain relief and joint stability, regardless of the severity of the lesion. CONCLUSION: The combined use of REAC NPO and TO can envisage a new rehabilitative approach, which aims not only at recovering the outcomes of the physical trauma, but also at improving the neuropsychical state that can condition the rehabilitation result.

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Currently, the treatment for patients with deltoid ligament injuries who require surgical treatment are anatomical repair and reconstruction. The clinicians should understand the exact knowledge of attachment areas of individual bands of deltoid ligament for a successful treatment. We studied 46 ankles of fresh frozen cadavers. The individual bands of deltoid ligament were divided to small fibers. Afterwards, each small fiber of each band was cut and marked with acrylic color on the origin and insertion followed by photo taking. Lastly, the photos of individual origin and insertion were used to calculate the attachment areas. We found six bands of deltoid ligament in all ankles except tibionavicular ligament. Moreover, we discovered deep to tibiocalcaneal and posterior to sustentaculum tali ligaments in 3 cases. Regarding the attachment area, the deep posterior tibiotalar ligament had the largest proximal and distal attachment areas which were 87.36±23.15 mm2 and 88.88±24.24 mm2, respectively. The anterior tibiotalar ligament had the least proximal and distal attachment areas which were 23.12±8.25 mm2 and 33.16±14.63 mm2, respectively. Hence, the accuracy and exact areas of attachment of deltoid ligament are important as it can help clinicians to select the suitable treatments including injury prevention.

Actualmente, el tratamiento para pacientes con lesiones del ligamento colateral medial de la articulación talocrural (ligamento deltoideo), que requieren tratamiento quirúrgico es la reparación y reconstrucción anatómica. Los médicos, para un tratamiento exitoso, deben conocer exactactamente las áreas de inserción de las partes de ligamento deltoideo. Estudiamos 46 tobillos de cadáveres congelados frescos. Las bandas individuales del ligamento deltoideo se dividieron en fibras pequeñas. Posteriormente, cada pequeña fibra de cada banda se cortó y marcó con color acrílico en el origen y la inserción, seguido de la toma de fotografías. Por último, las fotos de origen e inserción individuales se utilizaron para calcular las áreas. Encontramos seis bandas de ligamento deltoides en todos los tobillos, excepto el ligamento tibionavicular. Además, descubrimos en profundidad hasta los ligamentos tibiocalcaneaos y posteriores al sustentaculum tali en 3 casos. Con respecto al área de inserciónn, la parte tibiotalar posterior profundamente tenía las áreas de inserción proximal y distal más largas, que eran 87.36 ± 23.15 mm2 y 88.88 ± 24.24 mm2, respectivamente. La parte tibiotalar anterior del ligamento deltoideo tpresentaba áreas de unión menos proximales y distales 23.12 ± 8.25 mm2 y 33.16 ± 14.63 mm2, respectivamente. Por lo tanto, la precisión y las áreas exactas de inserción del ligamento deltoideo de la articulación talocrural son importantes, ya que pueden ayudar a los médicos a seleccionar los tratamientos adecuados, incluida la prevención de lesiones.

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There is a concern regarding which grafts should be used in combined anterior cruciate ligament (ACL) and medial collateral ligament (MCL) reconstructions, with a paucity of recommendations focused on this specific topic.Expert opinions suggest the use of allograft-only reconstructions to limit donor-site morbidity or using at least one allograft and one autograft.When a hamstring tendon autograft is harvested, techniques that maintain both the integrity of the sartorius fascia and the gracilis are recommended because of the role that the ST-G-S (semitendinosus-gracilis-sartorius) complex plays in valgus stability in the setting of an MCL-deficient knee. Cite this article: EFORT Open Rev 2020;5:221-225. DOI: 10.1302/2058-5241.5.190049.

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Resumen: Introducción: La inestabilidad del ligamento colateral medial (LCM) se asocia con lesiones multiligamentarias. Existen varios procedimientos para la reconstrucción del LCM, presentamos una técnica percutánea de aumentación. Nuestro objetivo es describir una nueva técnica de reconstrucción del LCM mediante injerto y fijación con tornillos biocompuestos. Material y métodos: Presentamos la técnica en un total de 21 pacientes consecutivos con lesión del LCM operados en el período de Diciembre de 2011 a Octubre de 2014. La reconstrucción del LCM se realizó con aloinjertos del tendón del peroneo largo, tibial posterior o flexor largo del Hallux en 18 pacientes y solamente en un paciente se utilizó autoinjerto. De los 20 pacientes, 18 presentaron lesiones asociadas: cinco con lesión de menisco medial, ocho con lesión del ligamento cruzado anterior, (LCA), ocho con lesión condral y uno con lesión del menisco lateral. Conclusión: La técnica quirúrgica presentada es sencilla de realizar, sin daño a otras estructuras y con una fijación resistente.

Abstract: Introduction: Medial Collateral Ligament (LCM) instability is associated with multi-ligamentary lesions. There are several procedures for the reconstruction of MCL, we present a percutaneous technique of augmentation. Our goal is to describe a new technique of reconstruction of the LCM by grafting and fixing with biocomposite screws. Material and methods: We present the technique in a total of 21 consecutive patients with MCL injury operated in the period of December 2011 to October 2014. Reconstruction of MCL was performed with long, tibial or long hallux tendon allografts in 18 patients and only one patient was used autograft. Eighteen of the 20 patients had associated lesions: 5 with medial meniscus injury, 8 with anterior cruciate ligament injury, (ACL), 8 with condral injury and 1 with lateral meniscus injury. Conclusion: The surgical technique presented is simple to perform, without damage to other structures and with a strong fixation.

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OJETIVO: Reportar la experiencia, después de 1 año de seguimiento, de una serie de 30 pacientes sometidos a reconstrucción de la esquina posteromedial (EPM) con la técnica descrita por La Prade. MÉTODO: Cohorte retrospectiva de 30 pacientes con lesión de EPM operados por el mismo equipo quirúrgico. Criterios de inclusión: diagnóstico clínico, radiografía con estrés y resonancia magnética compatibles con lesión de EPM, inestabilidad grado III luego de 3 meses de tratamiento ortopédico, técnica de reconstrucción de La Prade, al menos 12 meses de seguimiento. Criterios de exclusión: discordancia entre clínica e imagenología, inestabilidad grado I o II, y otra técnica quirúrgica. Evaluación con IKDC y Lysholm antes de la cirugía, a los 6 y 12 meses de seguimiento postcirugía. RESULTADOS: 30 pacientes cumplieron los criterios de inclusión. Promedio de edad 43 años (24­69). Veintiocho pacientes presentaron lesiones de alta energía, 20 pacientes fueron diagnosticados en agudo, mientras que 10 fueron diagnosticados luego de malos resultados en reconstrucción de otros ligamentos. Veintiocho presentaron lesiones asociadas: 11 casos asociados a lesión de ligamento cruzado anterior, 3 casos asociados a lesión de ligamento cruzado posterior, 3 casos en asociación con lesiones meniscales, 9 casos con lesión asociada de ligamento cruzado anterior y posterior, y 2 casos en asociación con ligamento cruzado anterior, posterior y ligamento colateral lateral. Promedio de tiempo hasta la reconstrucción de EPM fue de 5 meses (rango 2­32). Puntuación en Lysholm e IKDC (preoperatorio 18,2 y 24,3 respectivamente), mejoraron a 76,7 y 70,7 después de 1 año de seguimiento. Al fin del seguimiento, el rango articular promedio era 113° (90­140), la mayoría de los pacientes (24) tuvieron estabilidad tipo A según IKDC. CONCLUSIÓN: La reconstrucción de lesiones de EPM mejora los resultados clínicos en pacientes con inestabilidad crónica posteromedial de rodilla. Se observó mejoría en la estabilidad y scores funcionales de todos los pacientes.

OBJETIVE: Report the experience, after 1-year follow-up, of 30 patients with La Prade's anatomical reconstruction of posteromedial corner (PMC) injuries. METHODS: Retrospective cohort study. 30 patients with PMC injuries operated by the same surgical team. Inclusion criteria: clinical presentation, stress radiographs and MRI compatible with PMC injury, grade III chronic instability in spite of at least 3 months of orthopedic treatment, La Prade's anatomical technique reconstruction, 12 months follow-up at least. Exclusion criteria: discordance between clinical and image studies, grade I or II medial instability, any other surgical technique. IKDC and Lysholm at the preoperative evaluation, 6 and 12 months after surgery. RESULTS: Thirty patients met the inclusion criteria. Mean age 43 years (24­69). 28 patients presented high-energy mechanism of injury. Twenty patients were diagnosed in the acute setting, while 10 had a delayed diagnosis after poor results of other ligament reconstruction. Majority (28) had associated injuries: 11 cases PMC + anterior cruciate ligament (ACL) injury, 3 PMC + posterior cruciate ligament (PCL) injury, 3 PMC + meniscal tears, 9 PMC + ACL + PCL injuries, and 2 PMC + ACL + PCL + lateral collateral ligament injuries. Mean time for PMC reconstruction was 5 months (range 2­32). Preoperative Lysholm and IKDC scores (18,2 and 24,3 respectively) improved to 76,7 and 70,7 after 1-year follow-up. At the end of follow-up, average ROM was 113° (90­140), most patients (24) had type A IKDC stability. CONCLUSION: Acceptable results were achieved following reconstruction of PMC injuries in patients with chronic posteromedial knee instability. We observed instability and functional scores improvement in all patients.

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ResumenLa Enfermedad de Pellegrini Stieda consiste en la osificación del ligamento colateral medial de la rodilla, secundaria a un traumatismo. Se caracteriza por dolor que persiste meses posteriores al trauma.

AbstractPellegrini Stieda's disease consists of the ossification of the medial collateral ligament of the knee, secondary to trauma. It is characterized by pain that persists months after the trauma.

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Purpose: To evaluate the use of platelet-rich plasma in the early stages of healing of traumatic injury of the medial collateral ligament in the knee of rabbits. Methods: Thirty rabbits were subjected to surgical lesion of the medial collateral ligament. Of these, 16 were treated with platelet-rich plasma and 14 with saline (control). After 3 and 6 weeks of treatment, 50% of the animals from each group were sacrificed, and biomechanical tests were performed on the injured ligament to compare the tensile strength between the two groups. Results: Platelet-rich plasma significantly increased the tensile strength of the ligament in the groups treated after3 and 6 weeks. In the group treated with platelet-rich plasma vs. saline, the tensile strength values were 3192.5 ± 189.7 g/f vs. 2851.1 ± 193.1 g/f at3 weeks (p = 0.005) and 5915.6 ± 832.0 g/f vs. 4187.6 ± 512.9 g/f at 6 weeks (p = 0.0001). Conclusion: The use of platelet-rich plasma at the injury site accelerated ligament healing in an animal model, demonstrated by an increase in the tensile strength of the medial collateral ligament.(AU)

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Abstract Purpose: To evaluate the use of platelet-rich plasma in the early stages of healing of traumatic injury of the medial collateral ligament in the knee of rabbits. Methods: Thirty rabbits were subjected to surgical lesion of the medial collateral ligament. Of these, 16 were treated with platelet-rich plasma and 14 with saline (control). After 3 and 6 weeks of treatment, 50% of the animals from each group were sacrificed, and biomechanical tests were performed on the injured ligament to compare the tensile strength between the two groups. Results: Platelet-rich plasma significantly increased the tensile strength of the ligament in the groups treated after3 and 6 weeks. In the group treated with platelet-rich plasma vs. saline, the tensile strength values were 3192.5 ± 189.7 g/f vs. 2851.1 ± 193.1 g/f at3 weeks (p = 0.005) and 5915.6 ± 832.0 g/f vs. 4187.6 ± 512.9 g/f at 6 weeks (p = 0.0001). Conclusion: The use of platelet-rich plasma at the injury site accelerated ligament healing in an animal model, demonstrated by an increase in the tensile strength of the medial collateral ligament.

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PURPOSE: Lesions of the medial collateral ligament (MCL) are the most common knee ligament injuries, and lesions associated with the anterior cruciate ligament or the posterior cruciate ligament (PCL) in knee dislocations should be reconstructed to prevent failure of the central pivot reconstruction. The purpose of this study was to evaluate the outcomes of combined PCL/MCL reconstruction using a single femoral tunnel with a minimum 2-year follow-up. METHOD: A retrospective study of thirteen patients with combined PCL/MCL injuries was conducted. The patients underwent PCL and MCL reconstruction using an Achilles tendon allograft with a single tunnel in the medial femoral condyle, thereby avoiding tunnel conversion. RESULTS: All patients achieved a range of motion of at least 100°. The mean loss of extension and flexion values compared to the contralateral side was 1° ± 2° and 9° ± 10°, respectively. Our results included 26 reconstructions with three (11.5 %) failures, two in the PCL (15.3 %) and one in the MCL (7.6 %), in three different patients. In the final evaluation, the mean IKDC subjective score was 71.63 ± 16.23, the mean Lysholm score was 80.08 ± 13.87, and the median Tegner score was 6 (range = 2-7). CONCLUSION: The PCL/MCL reconstruction technique using a single femoral tunnel and an Achilles tendon allograft is safe, avoids the convergence of tunnels in the medial femoral condyle, has excellent results, and is reproducible. LEVEL OF EVIDENCE: IV.

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El signo de Pellegrini-Stieda es la calcificación del ligamento colateral medial de la rodilla posterior a trauma. La presencia de síntomas asociados a los hallazgos radiológicos se conoce con el nombre de síndrome de Pellegrini-Stieda. El dolor es el principal elemento caracterizador de la enfermedad. El tratamiento varía desde reposo, fisioterapia, uso de antiinflamatorios no esteroides, infiltración con glucocorticoides hasta cirugía, en casos severos y recalcitrantes

The Pellegrini-Stieda sign is a calcification of the medial collateral ligament of the knee after trauma. The presence of symptoms associated with radiological findings is known as Pellegrini-Stieda syndrome. Pain is the main element that characterises the disease. Treatment ranges from rest, physical therapy, use of nonsteroidal anti-inflammatory drugs, glucocorticoid injection, and even surgery in severe and recalcitrant cases

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A literatura relata que ligamentos consistem de tecido conjuntivo denso, composto por água, colágeno tipos I e III, diversas proteoglicanas, pouca elastina e várias outras substâncias. Além disso, os ligamentos, quando testados in vitro com tensão longitudinal e unidirecional, apresentam um comportamento mecânico não-linear, ou seja, as fibras colágenas são alongadas aos poucos, perdendo seu padrão ondulado, até que todas estejam no limite máximo de tração e iniciem o rompimento. Portanto, no presente estudo avaliou-se a presença de fibras elásticas (elastina) no ligamento colateral medial do cotovelo de cães adultos para ponderar se a elasticidade do referido ligamento deve-se à presença de fibras elásticas ou às propriedades elásticas do colágeno ou à combinação de ambas. Foram utilizadas quatro articulações, de machos e fêmeas em igual proporção, das quais foram adquiridas as amostras das porções médias dos ligamentos colaterais mediais para a rotina histológica. Os cortes foram corados pela técnica de Weigert, e não foi observada a presença de fibras elásticas, detectável por esta técnica à microscopia de luz. Concluiu-se que a elasticidade do ligamento colateral medial do cotovelo de cão deve-se, principalmente, ao padrão ondulado das fibras colágenas, devido à quantidade ínfima ou até à inexistência de fibras elásticas nesta estrutura.

The literature reports that ligaments consist of connective tissue, composed by water, Type I and III collagen, several proteoglycans, some elastin and other substances. Ligaments tested in vitro with longitudinal and unidirectional tension exhibit non-linear mechanical behavior; the collagen fibers are stretched little by little, losing their undulating pattern, until reaching the maximum limit of traction and failure begins. The aim of the present study was to assess the presence of elastin in the medial collateral ligament of the elbow in adult dogs to determine whether the stretching of this ligament is due to the presence of elastic fibers, the elastic property of the collagen or the combination of both. Four joints were used from males and females in equal proportion, taking the medial collateral ligaments for the histological examination. To detect the presence of elastic fibers, sections were stained using the Weigert method. However, light microscopy revealed no elastic fibers. It was concluded that the elasticity of the canine elbow medial collateral ligament is mainly due to the undulated pattern of the collagen fibers, considering the trace amount or inexistence of elastic fibers in this structure.

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