Effects of higher femoral tunnels on clinical outcomes, MRI, and second-look findings in double-bundle anterior cruciate ligament reconstruction with a minimal 5-year follow-up / 中华医学杂志(英文版)

BACKGROUND@#To perform anatomical anterior cruciate ligament reconstruction (ACLR), tunnels should be placed relatively higher in the femoral anterior cruciate ligament (ACL) footprint based on the findings of direct and indirect femoral insertion. But the clinical results of higher femoral tunnels (HFT) in double-bundle ACLR (DB-ACLR) remain unclear. The purpose was to investigate the clinical results of HFT and lower femoral tunnels (LFT) in DB-ACLR.@*METHODS@#From September 2014 to February 2016, 83 patients who underwent DB-ACLR and met the inclusion and exclusion criteria were divided into HFT-ACLR (group 1, n = 37) and LFT-ACLR (group 2, n = 46) according to the position of femoral tunnels. Preoperatively and at the final follow-up, clinical scores were evaluated with International Knee Documentation Committee (IKDC), Tegner activity, and Lysholm score. The stability of the knee was evaluated with KT-2000, Lachman test, and pivot-shift test. Cartilage degeneration grades of the International Cartilage Repair Society (ICRS) were evaluated on magnetic resonance imaging (MRI). Graft tension, continuity, and synovialization were evaluated by second-look arthroscopy. Return-to-sports was assessed at the final follow-up.@*RESULTS@#Significantly better improvement were found for KT-2000, Lachman test, and pivot-shift test postoperatively in group 1 ( P >0.05). Posterolateral bundles (PL) showed significantly better results in second-look arthroscopy regarding graft tension, continuity, and synovialization ( P <0.05), but not in anteromedial bundles in group 1. At the final follow-up, cartilage worsening was observed in groups 1 and 2, but it did not reach a stastistically significant difference ( P >0.05). No statistically significant differences were found in IKDC subjective score, Tegner activity, and Lysholm score between the two groups. Higher return-to-sports rate was found in group 1 with 86.8% (32/37) vs. 65.2% (30/46) in group 2 ( P = 0.027).@*CONCLUSION@#The HFT-ACLR group showed better stability results, better PL, and higher return-to-sports rate compared to the LFT-ACLR group.

Reconstrucción de ligamento cruzado anterior: incidencia de infecciones y trombosis venosa profunda en una serie de 714 casos consecutivos / ACL reconstruction. Incidence of Infection and deep venous thrombosis. 714 case series

Introducción: La reconstrucción artroscópica del ligamento cruzado anterior (LCA) tiene un bajo índice de complicaciones postoperatorias. Cuando se presenta una infección en el postoperatorio inmediato, tanto el cirujano como el paciente se enfrentan a un escenario complejo y de difícil aceptación, que en algunos casos tiene consecuencias graves. En este contexto es importante conocer la incidencia reportada en la literatura para compararla con lo que ocurre en nuestras instituciones. El objetivo del presente trabajo es evaluar la incidencia de infección en una serie de casos consecutivos de reconstrucciones de LCA. Materiales y métodos: se realizó un estudio retrospectivo del período comprendido entre enero de 2015 y diciembre de 2017, donde se evaluó la incidencia de infección en una serie consecutiva de reconstrucciones de LCA. Fueron evaluados un total de setecientos catorce pacientes: seiscientos veintinueve masculinos y ochenta y cinco femeninos con un promedio de edad de veintiocho años (15-50).Resultados: de los setecientos catorce casos analizados, se encontraron seis infecciones postquirúrgicas (dos profundas y cuatro superficiales). Conclusiones: la incidencia de infección aguda postoperatoria luego de reconstrucción artroscópica del LCA fue del 0.84%, similar a lo reportado en la literatura. Se observó un franco predominio de infecciones en las reconstrucciones de LCA con injerto de isquiotibiales con respecto al resto de los injertos. Nivel de Evidencia: IV

Introduction: Complication rate of arthroscopic anterior cruciate ligament (ACL) reconstruction is low. Post-operative infection place both, the surgeon and patient in a difficult situation with an unknown outcome and possible serious sequalae. It is important to investigate the incidence of these complications in our institutions to compare them with existing literature. The aim of this study is to report the incidence of infection in a consecutive case series of ACL reconstruction. Materials and methods: retrospective study of consecutive ACL reconstructions performed between January 2015 to December 2017. The incidence of infection was evaluated in 714 cases, 629 males and 85 females, with average age of 28 years (15-50).Results: six post-operative infections were found (four superficial and two deep infections). Conclusions: the incidence of infection was 0.84% in this case series. Most of the infections were in patients with autologous gracilis-semitendinous grafts. Level of Evidence: IV

Bicruciate Reconstruction with Bilateral Hamstring Autografts: Technique and Functional Results / Reconstrução dos ligamentos cruzados anterior e posterior com autoenxertos bilaterais dos isquiotibiais: Técnica e resultados funcionais

Abstract Objective The purpose of this study was to evaluate the clinical and functional results of simultaneous reconstruction of the ACL and PCL with bilateral hamstring autografts. We hypothesized that this reconstruction technique results in less morbidity and has similar results to the ones published in the previous literature. Methods Eighteen patients with bicruciate lesions were selected and treated by arthroscopic surgery with autologous hamstring tendons in a single-stage procedure. The thicker semitendinosus tendon (ST) and the two gracilis tendons (G) were used for a 6-strand PCL reconstruction. The thinner ST was used for a 3-strand ACL reconstruction. The average patient age at surgery was 31 years, and the minimum follow-up was 2 years. Function of the operated knee was evaluated according to the Lysholm scale. Anterior knee laxity was examined with a KT-1000 arthrometer. Posterior laxity was evaluated using stress radiographies. Results Statistically significant improvements were found for all three measurements (p < 0.001). Knee function by the Lysholm score increased from 43.8 ± 4.1 to 89.9 ± 3.8 post-surgery. The average anterior knee laxity improved from 5.2 + −0.8 mm initially to 2.4 + - 0.5 mm post-surgery. The posterior translation of the tibia relative to the femur decreased from 10 ± 3.4 mm to 3 ± 1.6 mm post-surgery. No patient showed loss of motion in extension or knee flexion. Conclusion The simultaneous bicruciate reconstruction with bilateral hamstring autograft is a valuable option to achieve good functional outcomes and ligamentous stability.

Resumo Objetivo O objetivo deste estudo foi avaliar os resultados clínicos e funcionais da reconstrução simultânea do ligamento cruzado anterior (LCA) e ligamento cruzado posterior (LCP) com autoenxertos bilaterais de isquiotibiais. Nossa hipótese é que esta técnica de reconstrução gera menor morbidade e tem resultados semelhantes aos publicados na literatura anterior. Métodos Dezoito pacientes com lesões em LCA e LCP foram selecionados e tratados por cirurgia artroscópica com tendões isquiotibiais autólogos em procedimento único. O tendão semitendinoso (ST) mais espesso e os dois tendões do músculo grácil (G) foram usados para a reconstrução do LCP com seis fios. O ST mais fino foi usado para reconstrução do LCA com três fios. A média de idade dos pacientes à cirurgia foi de 31 anos e o acompanhamento mínimo foi de 2 anos. A função do joelho operado foi avaliada de acordo com a escala de Lysholm. A lassidão anterior do joelho foi examinada com um artrômetro KT-1000. A lassidão posterior foi determinada por meio de radiografias de estresse. Resultados Melhoras estatisticamente significativas foram observadas nas três medidas (p < 0,001). A função do joelho pelo escore de Lysholm aumentou de 43,8 ± 4,1 para 89,9 ± 3,8 após a cirurgia. A lassidão anterior média do joelho melhorou de 5,2 ± 0,8 mm para 2,4 ± 0,5 mm após a cirurgia. A translação posterior da tíbia em relação ao fêmur diminuiu de 10 ± 3,4 mm para 3 ± 1,6 mm no período pós-operatório. Nenhum paciente apresentou perda de movimento em extensão ou flexão do joelho. Conclusão A reconstrução simultânea do LCA e do LCP com autoenxerto bilateral dos isquiotibiais é uma opção valiosa para obtenção de bons resultados funcionais e estabilidade ligamentar.

The Influence of Tunnel Parameters and Graft Inclination Angle on Clinical and Radiological Outcome at Long-term Follow-up after Arthroscopic Anterior Cruciate Ligament Reconstruction / Influência dos parâmetros do túnel e do ângulo de inclinação do enxerto no desfecho clínico e radiológico no acompanhamento de longo prazo após a reconstrução artroscópica do ligamento cruzado anterior

Abstract Objective To study the influence of various tunnel parameters and graft inclination angle (GIA) on the clinical and radiological outcome after anterior cruciate ligament reconstruction (ACLR) at long-term follow-up. Methods In this retrospective study, 80 patients with isolated anterior cruciate ligament (ACL) injury treated by single bundle ACLR using bone patellar tendon bone (BPTB) and hamstring (HT) autografts were evaluated clinically and radiologically at their long-term follow-up. The study population were divided into two groups based on ideal and nonideal tunnel parameters as well as ideal and nonideal GIA. The various tunnel parameters and GIA were interpreted with clinical and radiological outcome at long-term follow-up. Results Eighty patients, 36 (45%) using BPTB and 44 (55%) using HT autografts, were available to complete the study. Patients with ideal coronal tibial tunnel angle (CTTA) and coronal femoral tunnel angle (CFTA) show superior clinical outcome (pivot shift test) than nonideal CTTA and CFTA, which was found to be statistically significant (p-value < 0.038 and 0.024, respectively). Similarly, patients with ideal coronal tibial tunnel position (CTTP) show superior clinical outcome (International Knee Documentation Committee - IKDC objective) over nonideal CTTP (p-value < 0.017). All other tunnel parameters and GIA were not found to have influence on clinical outcome. None of the tunnel parameters have influenced osteoarthritis (OA) change. There was no progression of OA change in the study population at long-term follow-up after ACLR. Conclusion Ideal coronal tunnel parameters produced a better clinical outcome at long-term follow-up after ACLR. There was no progression of OA change at long-term follow-up after isolated ACLR.

Resumo Objetivo O objetivo deste estudo foi analisar a influência de vários parâmetros do túnel e do ângulo de inclinação do enxerto (GIA, do inglês graft inclination angle) nos desfechos clínicos e radiológicos da reconstrução do ligamento cruzado anterior (RLCA) no acompanhamento de longo prazo. Métodos Neste estudo retrospectivo, 80 pacientes com lesão isolada do ligamento cruzado anterior (LCA) submetidos à RLCA de feixe único com autoenxertos de tendão patelar ósseo (TPO) e isquiotibiais (IT) foram avaliados clínica e radiologicamente durante o acompanhamento em longo prazo. A população do estudo foi dividida em dois grupos com base nos parâmetros ideais ou não ideais do túnel, bem como no GIA ideal e não ideal. Os vários parâmetros do túnel e o GIA foram interpretados com os desfechos clínicos e radiológicos no acompanhamento em longo prazo. Resultados Oitenta pacientes, sendo 36 (45%) submetidos ao procedimento com autoenxertos de TPO e 44 (55%) com autoenxertos IT, puderam completar o estudo. Pacientes com ângulo do túnel tibial coronal (ATTC) e ângulo do túnel femoral coronal (ATFC) ideais apresentam resultados clínicos superiores (teste de pivot shift) do que aqueles com ATTC e ATFC não ideais, sendo a diferença estatisticamente significativa (valor de p < 0,038 e 0,024, respectivamente). Da mesma forma, pacientes com posição do túnel tibial coronal (PTTC) ideal apresentam resultado clínico superior (International Knee Documentation Committee [IKDC] objetivo) em relação àqueles com PTTC não ideal (valor de p < 0,017). Os demais parâmetros do túnel e o GIA não influenciaram o desfecho clínico. Nenhum dos parâmetros do túnel influenciou a alteração associada à osteoartrite (OA). Não houve progressão da alteração da OA na população do estudo no acompanhamento em longo prazo após a RLCA. Conclusão Os parâmetros ideais do túnel coronal produziram um melhor desfecho clínico no acompanhamento de longo prazo após a RLCA. Não houve progressão da alteração da OA no acompanhamento em longo prazo após a RLCA isolada.

Combined Anterior Cruciate Ligament Reconstruction (ACLR) and Lateral Extra-articular Tenodesis through the Modified Lemaire Technique versus Isolated ACLR: A Meta-analysis of Clinical Outcomes / Reconstrução combinada do ligamento cruzado anterior (RLCA) e tenodese extra-articular lateral pela técnica de Lemaire modificada versus RLCA isolada: Uma metanálise dos resultados clínicos

Abstract Objective Lateral extra-articular tenodesis (LET) has been proposed to resolve rotatory instability following anterior cruciate ligament reconstruction (ACLR). The present meta-analysis aimed to compare the clinical outcomes of ACLR and ACLR with LET using the modified Lemaire technique. Materials and Methods We performed a meta-analysis following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) staement. The literature search was performed on the PubMed, EBSCOHost, Scopus, ScienceDirect, and WileyOnline databases. The data extracted from the studies included were the study characteristics, the failure rate (graft or clinical failure) as the primary outcome, and the functional score as the secondary outcome. Comparisons were made between the patients who underwent isolated ACLR (ACLR group) and those submitted to ACLR and LET through the modified Lemaire technique (ACLR + LET group). Results A total of 5 studies including 797 patients were evaluated. The ACLR + LET group presented a lower risk of failure and lower rate of rerupture than the ACLR group (risk ratio [RR] = 0.44; 95% confidence interval [95%CI]: 0.26 to 0.75; I2 = 9%; p = 0.003). The ACLR + LET group presented higher scores on the Knee Injury and Osteoarthritis Outcome Score (KOOS) regarding the following outcomes: pain, activities of daily living (ADL), sports, and quality of life (QOL), with mean differences of 0.20 (95%CI: 0.10 to 0.30; I2 = 0%; p < 0.0001), -0.20 (95%CI: -0.26 to -0.13; I2 = 0%; p < 0.00001), 0.20 (95%CI: 0.02 to 0.38; I2 = 0%; p = 0.03), and 0.50 (95%CI: 0.29 to 0.71; I2 = 0%; p < 0.00001) respectively when compared with the ACLR group. Conclusion Adding LET through the modified Lemaire technique to ACLR may improve knee stability because of the lower rate of graft rerupture and the superiority in terms of clinical outcomes. Level of Evidence I.

Resumo Objetivo A tenodese extra-articular lateral (TEL) foi proposta para resolver a instabilidade rotatória após a reconstrução do ligamento cruzado anterior (RLCA). Esta metanálise teve como objetivo comparar os resultados clínicos da RLCA e da RLCA com TEL por meio da técnica de Lemaire modificada. Materiais e Métodos Esta metanálise foi feita de acordo com a declaração dos Itens Principais para Relatar Revisões Sistemáticas e Metanálises (Preferred Reporting Items for Systematic Reviews and Meta-Analysis, PRISMA, em inglês). A pesquisa bibliográfica foi realizada nos bancos de dados PubMed, EBSCOHost, Scopus, ScienceDirect e WileyOnline. Dos estudos incluídos foram extraídas informações sobre as características do estudo, a taxa de falha (falha clínica ou do enxerto) como resultado primário, e o escore funcional como resultado secundário. Foram feitas comparações entre os pacientes submetidos apenas à RLCA (grupo RLCA) e à RLCA e TEL pela técnica de Lemaire modificada (grupo RLCA + TEL). Resultados Foram avaliados 5 estudos que incluíam 797 pacientes. O grupo RLCA + TEL apresentou um risco menor de falha e menor taxa de rerruptura do que o grupo RLCA (razão de risco [RR] = 0,44; intervalo de confiança de 95% [IC95%] 0,26 a 0,75; I2 = 9%; p = 0,003). O grupo RLCA + TEL obteve pontuações maiores no Escore de Desfechos de Osteoartrite e Lesão no Joelho (Knee Injury and Osteoarthritis Outcome Score, KOOS, em inglês) com relação aos seguintes desfechos: dor, atividades cotidianas (AC), esportes, e qualidade de vida (QV), com diferenças médias de 0,20 (IC95%: 0,10 a 0,30; I2 = 0%; p < 0,0001), -0.20 (IC95%: -0,26 a-0,13; I2 =0%; p < 0,00001), 0,20 (IC95%: 0,02 a 0,38; I2 = 0%; p = 0,03) e 0,50 (IC95%: 0,29 a 0,71; I2 = 0%; p < 0,00001), respectivamente, quando comparado com o grupo RLCA. Conclusão O acréscimo de TEL pela técnica de Lemaire modificada à RLCA pode melhorar a estabilidade do joelho devido à menor taxa de rerruptura do enxerto e à superioridade dos resultados clínicos. Nível de evidência I.

A Novel Fixation Method of the Graft to the Fibular Head in Knee Lateral Collateral Ligament Reconstruction: Technical Note / Um novo método de fixação do enxerto para a cabeça fibular na reconstrução do ligamento colateral lateral do joelho: Nota técnica

Abstract The lateral collateral ligament (LCL) is the strongest lateral stabilizer of the knee. It provides support against varus stress and posterolateral rotation of the knee. Lateral collateral ligament injuries mostly occur together with anterior and/or posterior cruciate ligament injuries. While grades 1 and 2 injuries are treated conservatively since they are partial injuries, total ruptures, as in grade 3, require surgical treatment. In conventional LCL reconstruction methods, hamstring grafts are used, and bioscrews are used in bone-tendon fixation. Lateral collateral ligament reconstruction is usually performed as a component of multiple ligament surgery. Therefore, there is a need for a contralateral hamstring tendon or allograft. The present article aims to define a technique that does not require tendon grafts and bioscrews in fibular fixation.

Resumo O ligamento colateral lateral (LCL) é o estabilizador lateral mais forte do joelho. Ele fornece suporte contra o estresse varus e a rotação de posterolateral do joelho. As lesões de LCL ocorrem principalmente com lesões do ligamento cruzado anterior e/ou posterior. Enquanto as lesões grau 1 e 2 são tratadas de forma conservadora, uma vez que são lesões parciais, rupturas totais, como no grau 3, requerem tratamento cirúrgico. Utilizam-se enxertos isquiotibiais nos métodos convencionais de reconstrução da LCL e bioscrews na fixação do tendão ósseo. A reconstrução do LCL é geralmente realizada como um componente de cirurgia de ligamento múltiplo. Portanto, há necessidade de um tendão contralateral ou aloenxerto. O presente artigo tem como objetivo definir uma técnica que não exija enxertos tendíneos e bioscrews na fixação fibular.

Description of the Anterior Cruciate Ligament Reconstruction Technique with Mini-Lemaire Type Anterolateral Tenodesis through a Single Femoral Tunnel / Descrição de técnica de reconstrução do ligamento cruzado anterior com tenodese ântero-lateral tipo mini-Lemaire através de túnel único femoral

Abstract The anterior cruciate ligament (ACL) injury causes anteroposterior and rotational instability in the knee. Intra-articular reconstructions often fail to achieve satisfactory rotational control, leading to persistent complaints of instability and subjecting the neo-ligament to increased stress. Young patients with high athletic demands and grade 2 or 3 pivot-shift often have a higher risk of re-rupture after isolated ACL reconstruction. Over the years, various techniques have been developed to address such situations. Among the described techniques, one of the most commonly used is the modified or "mini-Lemaire" lateral extra-articular tenodesis. Biomechanical studies demonstrate the versatility of the technique due to its relatively isometric behavior in flexion angles of 0-60° when the graft is introduced deeply to the lateral collateral ligament. It offers the possibility of fixation at different anatomical positions on the lateral femoral condyle and at different degrees of flexion. The objective of this study is to describe an accessible, reproducible technique that relies on materials widely available in our environment.

Resumo A lesão do ligamento cruzado anterior (LCA) causa instabilidade anteroposterior e rotatória do joelho. Reconstruções isoladas intra-articulares muitas vezes não obtêm controle rotacional satisfatório, mantendo queixa de instabilidade e impondo ao neoligamento um maior estresse. Pacientes jovens, com alta demanda atlética e com pivot-shift grau 2 ou 3 apresentam um maior risco de rerrotura após reconstrução isolada do LCA. Ao longo dos anos diversas técnicas foram desenvolvidas na tentativa de mitigar tais situações. Dentre as técnicas descritas, uma das mais utilizadas é a Tenodese extra-articular Lateral tipo Lemaire modificada ou "mini-Lemaire". Estudos biomecânicos demonstram versatilidade da técnica devido a seu comportamento relativamente isométrico em graus de flexão de 0-60° quando a fita é introduzida profundamente ao ligamento colateral lateral, com possibilidade de fixação em diferentes posições anatômicas no côndilo femoral lateral e em diferentes graus de flexão. O objetivo do estudo é descrever uma técnica acessível, reprodutível e dependente de material amplamente disponível em nosso meio.

Functional Outcome of ACL Reconstruction Following Pre-reconstruction Rehabilitation vs. None Rehabilitation: A Systematic Review and Meta-analysis / Resultado funcional da reconstrução do LCA após habilitação pré-reconstrução vs. nenhuma pré-habilitação: Revisão sistemática e metanálise

Abstract Objective The aim of this study is to analyse the needs for pre-operative rehabilitation in patients undergoing ACL reconstruction. Methods The database reports were searched within 2018 to 2023, using PubMed, Cochrane library database, Medline, and other published trials. A statistical analysis was made from Review Manager. Results Pre-operative rehabilitation group shows significantly higher 2 years post-operative KOOS score in all subscore and the total mean of the score, pain (p < 0. 0001), symptoms (p < 0. 0001), ADL (p < 0. 0001), sports and recreations (p < 0. 0001), QoL (p < 0. 0001), and the total mean of the KOOS score (p < 0.0001). In contrary, pre-operative rehabilitation group shows insignificantly higher score on 3 months post-operative Lysholm score (p = 0.12). Conclusion This meta-analysis conclude pre-operative rehabilitation may provide better long-term post-operative outcome, however it may not provide much of a short-term outcome. It is recommended to add pre-operative rehabilitation as a guideline for ACL injury management to improve long-term outcome of patients with ACL injury undergoing ACL reconstruction procedure.

Resumo Objetivo O objetivo deste estudo é analisar as necessidades de pré-habilitação cirúrgica em pacientes submetidos à reconstrução do LCA. Métodos Os relatórios das bases de dados foram pesquisados entre 2018 e 2023, utilizando PubMed, base de dados da biblioteca Cochrane, Medline e outros artigos publicados. Uma análise estatística foi feita utilizando-se o Review Manager. Resultados O grupo de pré-habilitação cirúrgica apresenta pontuação KOOS pós-operatória de 2 anos significativamente maior em todos os subescores e na média total da pontuação, dor (p < 0,0001), sintomas (p < 0,0001), AVD (p < 0,0001). 0,0001), esportes e recreação (p < 0,0001), QV (p < 0,0001) e média total do escore KOOS (p < 0,0001). Em contrapartida, o grupo de habilitação pré-operatória apresenta pontuação insignificantemente maior no escore de Lysholm pós-operatório de 3 meses (p = 0,12). Conclusão Esta metanálise conclui que a pré-habilitação cirúrgica pode proporcionar melhores resultados pós-operatórios a longo prazo, no entanto, pode não proporcionar um resultado significativo a curto prazo. Recomenda-se adicionar a pré-habilitação cirúrgica como uma diretriz para o manejo da lesão do LCA para melhorar o resultado a longo prazo dos pacientes com lesão do LCA submetidos ao procedimento de reconstrução do LCA.

Transtibial Femoral Tunnel Technique in ACL Reconstruction and Osteoarthritis Incidence / Técnica do túnel femoral transtibial na reconstrução do LCA e incidência de osteoartrite

Abstract Objective: Evaluate osteoarthritis incidence in patients that undergone ACL reconstruction using the transtibial technique, with a minimum of 5 years of follow up, with isolated ACL injury. Methods: Patients who underwent ACL reconstruction by the same surgeon using the transtibial technique with hamstrings graft and with a minimum of 5 years of follow-up, without other injuries during the surgical procedure, were selected to undergo imaging exams of the operated knee to assess the incidence of osteoarthritis. The obtained data were evaluated by descriptive statistics. Results: Forty-two patients (44 knees) were evaluated, with a mean age of 31 years old (SD: 8), being 23 right knees and 28 male patients. Mean time from surgery to imaging evaluation was 94.1 months (ranging from 60 to 154 months; SD: 28). Of the evaluated knees, 37 did not have osteoarthritis (83.3%) and 7 had (16.7%). Conclusion: ACL reconstruction with femoral tunnel performed through the transtibial technique in patients without other associated injuries in the operated knee, using hamstrings graft, with a minimum of 5 years of follow up, showed an osteoarthritis incidence of 16.7% in a mean follow-up of 94.1 months. Level Of Evidence V; Case Series.

Resumo Objetivo: Avaliar a incidência de osteoartrite em pacientes submetidos à reconstrução do LCA pela técnica transtibial, com seguimento mínimo de 5 anos, com lesão isolada do LCA. Métodos: Pacientes que passaram por reconstrução LCA pelo mesmo cirurgião usando a técnica transtibial com enxerto de tendão dos músculos isquiotibiais e que foram acompanhados por no mínimo 5 anos, sem outras lesões durante o procedimento cirúrgico, foram selecionados para realizar exames de imagem do joelho operado a fim de avaliar a incidência de osteoartrite. Os dados obtidos foram avaliados por meio de estatísticas descritivas.. Resultados: Foram avaliados 42 pacientes (44 joelhos), com idade média de 31 anos (DP: 8), sendo 23 joelhos direitos e 28 pacientes do sexo masculino. O tempo médio entre a cirurgia e a avaliação por imagem foi de 94,1 meses (variando de 60 a 154 meses; DP: 28). Dos joelhos avaliados, 37 não apresentavam osteoartrite (83,3%) e 7 apresentavam (16,7%). Conclusão: A reconstrução do LCA com túnel femoral realizado por meio da técnica transtibial em pacientes sem outras lesões associadas no joelho operado, utilizando enxerto dos tendões isquiotibiais, com um acompanhamento mínimo de 5 anos, apresentou uma incidência de osteoartrite de 16,7% em um acompanhamento médio de 94,1 meses. Level of Evidence V; Case Series. Nível de Evidência V; Série de casos

Graft Selection Between Tendon Autograft and Allograft in Anterior Cruciate Ligament Reconstruction Based on the Histological Perspective: A Meta-Analysis / Seleção de enxerto entre autoenxerto e aloenxerto de tendão na reconstrução do ligamento cruzado anterior com base na perspectiva histológica: uma metanálise

Abstract Objective The purpose of this meta-analysis is to compare ligament healing on autograft and allograft in anterior cruciate ligament (ACL) reconstruction. Methods The selection of appropriate studies was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. We made a statistical analysis using a review manager. Electronic reports were searched using the PubMed, Medline, and Cochrane Library databases. The inclusion criteria were animal studies and cellular histology of both grafts as an outcome. Results The initial search revealed 412 potential articles. After duplicates were removed, 246 articles remained. Then, 14 articles were obtained and screened for relevance and eligibility. The relevant articles were searched manually, checking for eligibility and details in order not to miss included reports. Subsequently, 5 studies were included, with a total of 232 samples, reporting the biopsied results with quantitative histology of ligament healing between allograft and autograft. The biopsy samples in those studies were examined under light or electron microscope, to analyze the cellular distribution area and ligamentization stages in each group. Meta-analyses found significant difference between autograft and allograft (Heterogeneity, I2 = 89%; Mean Difference, 95% confidence interval [CI] =-34.92, -54.90, -14.93; p = 0.0006). There is also a significant difference on both graft in cellular count at over 24 weeks (Heterogeneity, I2 = 26%; Mean Difference, 95% CI = -14.59, -16.24, -12.94; p < 0.00001). Conclusion In the current meta-analysis, autograft shows a significant difference when compared to allograft, with more cellular accumulation and faster remodeling response on the ligamentization process being noticed in the former. However, a larger clinical trial will be needed to emphasize this literature's result.

Resumo Objetivo O objetivo desta metanálise comparar a cicatrização de ligamentos no autoenxerto e aloenxerto na reconstrução do ligamento cruzado anterior (LCA). Métodos A seleção dos estudos adequados foi realizada de acordo com as diretrizes de Relatórios Preferenciais para Revisões Sistemáticas e Metanálises (Preferred Reporting Items for Systematic Reviews and Meta-Analyses - PRISMA). Uma análise estatística foi feita usando um gerente de revisão. Os relatórios eletrônicos foram pesquisados usando os bancos de dados PubMed, Medline e Cochrane Library. Os critérios de inclusão foram estudos em animais e a histologia celular de ambos os enxertos como desfecho. Resultado A pesquisa inicial revelou 412 artigos potenciais. Após a retirada das duplicatas, restaram 246 artigos. Então, 14 artigos foram obtidos e selecionados pela relevância e elegibilidade. Os artigos relevantes foram pesquisados manualmente, verificando sua elegibilidade e detalhando os estudos para não perder os relatórios incluídos. Posteriormente, foram incluídos 5 estudos, com um total de 232 amostras, relatando os resultados de biópsia com histologia quantitativa de cicatrização de ligamento entre aloenxerto e autoenxerto. As amostras de biópsia nesses estudos foram examinadas sob microscópio leve ou eletrônico, para análise da área de distribuição celular e estágios de ligamentização em cada grupo. As metanálises encontraram diferença significativa entre autoenxerto e aloenxerto (Heterogeneidade, I2 = 89%; Diferença média, 95% intervalo de confiança [IC] =-34,92, -54,90, -14,93; p = 0,0006). Também há uma diferença significativa nosdoisenxertosnacontagem celular de mais de 24 semanas (Heterogeneidade, I2 = 26%; Diferença média, 95% IC = -14,59 , -16,24, -12,94; p < 0,00001). Conclusão Na presente metanálise, o autoenxerto mostra resultados significativos quando comparado ao aloenxerto, com mais acúmulo celular e resposta de remode-lagem mais rápida no processo de ligamentizaçãosendoobservadonoprimeiro.No entanto, será necessário um estudo clínico maior para enfatizar o resultado desta literatura.

Calculation of the Minimal Important Clinical Difference of the Lysholm and IKDC Scores After Anterior Cruciate Ligament Reconstruction / Cálculo da mínima diferença clínica importante dos escores Lysholm e IKDC após reconstrução do ligamento cruzado anterior

Abstract Objective To calculate the minimal important clinical difference (MICD) value for the Lysholm and International Knee Documentation Committee (IKDC) scores in a sample of patients submitted to anterior cruciate ligament reconstruction. Methods Primary, observational, retrospective, analytical study of participants submitted to anterior cruciate ligament reconstruction from March 2019 to December 2020 by the same surgeon, with a minimum follow-up of 6 months, analysis of knee function in the pre- and postoperative period by the Lysholm and IKDC scores, and answer to an anchor question at 6 months postoperatively for the calculation of the MICD of each score. Results A total of 59 patients participated in the study, with a mean age of 27.1 ± 5.7 years old. In the comparison between pre- and postoperative scores of all groups, there was an increase in values with statistical significance after intervention. The MICD was 5.5 for the Lysholm score, and the MICD value for the IKDC score could not be determined. Conclusion For the Lysholm score, the calculation of the MICD value by the anchor question method in the sample evaluated was 5.5. It was not possible to determine the value of the MICD for the IKDC score.

Resumo Objetivo Calcular o valor da mínima diferença clinicamente importante (MDCI) para os escores de Lysholm e International Knee Documentation Commitee (IKDC) na amostra de pacientes submetidos a reconstrução de ligamento cruzado anterior. Métodos Estudo primário, observacional, retrospectivo, analítico, de participantes submetidos a reconstrução do ligamento cruzado anterior no período de março de 2019 a dezembro de 2020, pelo mesmo cirurgião, com seguimento mínimo de 6 meses, análise da função do joelho no período pré e pós-operatório pelos escores de Lysholm e IKDC, e resposta a uma pergunta âncora aos 6 meses de seguimento pós-operatório, para o MDCI de cada escore. Resultados Participaram do estudo 59 pacientes, com média de idade de 27,1 ± 5,7 anos. Na comparação dos escores pré- e pós-operatórios de todos os grupos, observa-se aumento dos valores com significância estatística após a intervenção. A MDCI foi de 5,5 para o escore de Lysholm, não tendo sido possível determinar o valor para o IKDC. Conclusão O cálculo do valor da MDCI pelo método da pergunta âncora, na amostra avaliada, foi de 5,5 para o escore de Lysholm. Não foi possível determinar o valor da MDCI para o IKDC.

En la búsqueda de predictores que nos ayuden a obtener un mejor resultado en la cirugía de revisión de ligamento cruzado anterior / In the search for predictors that help us obtain a better result in anterior cruciate ligament revision surgery

Introducción: Los factores de riesgo de re-ruptura de LCA son errores técnicos, características del injerto, lesiones meniscales, condrales o lesiones no tratadas. El objetivo de nuestro trabajo fue reconocer predictores modificables que nos ayuden a obtener un mejor resultado en la cirugía de revisión de LCA. Materiales y métodos: estudio descriptivo transversal. Serie de pacientes tratados en nuestro centro entre 2011 y 2021 a los cuales se les realizó cirugía de revisión de LCA. Se registraron edad, sexo, falla de cirugía primaria traumática, o no, fijación utilizada, ubicación de ambos túneles, injerto utilizado en la cirugía primaria, lesiones articulares condrales y meniscales antiguas y nuevas y tipo de injerto utilizado en cirugía de revisión. Resultados: se analizaron un total de ciento nueve pacientes. Con mayor frecuencia, los pacientes masculinos se sometieron a revisión entre los veinte y los cuarenta años. La principal causa traumática fue la práctica deportiva (40.37%), seguida de accidente de tránsito o en domicilio (7.33%) y en ambiente laboral (24.8%), y sin causa demostrable (27.5%). La mala posición del túnel femoral aislada fue la falla técnica más común en un 41.29%, sin error técnico en 38.53%, y falla de colocación de túnel tibial aislada en 2.75%. En el total de los pacientes evaluados, el 28.44% (treinta y un pacientes) no presentó lesión meniscal previa ni actual; mientras que el 71.56% (setenta y ocho pacientes) evidenció algún tipo de lesión. La elección del injerto fue autoinjerto de H-T-H (30.28%), aloinjerto de tibial posterior (30.28%), aloinjerto de tibial anterior (19.27%), autoinjerto de ST-RI (11.01%), y otros aloinjertos Aquiles, Peroneos y ST (9.17%).Discusión: serán necesarios más estudios para determinar si esta tasa de falla persiste a pesar de nuestro mayor conocimiento de la técnica y diversos aspectos de la cirugía de revisión. Nivel de Evidencia: IV

Introduction: Risk factors for ACL rupture are technical errors, graft characteristics, meniscal and chondral injuries, or untreated injuries. The objective of our work was to recognize modifiable predictors that help us obtain a better result in ACL revision surgery. Materials and methods: cross-sectional descriptive study. Series of patients treated at our center between 2011 and 2021 who underwent ACL revision surgery. Age, sex, traumatic or non-traumatic primary surgery failure, fixation used, location of both tunnels, graft used in primary surgery, old and new chondral and meniscal joint injuries and type of graft used in revision surgery were recorded. Results: a total of one hundred and nine patients were analyzed. Most often, male patients underwent revision between the ages of twenty and forty. The main traumatic cause was sports practice (40.37%), followed by traffic accident or at home (7.33%) and in the work environment (24.8%), and without demonstrable cause (27.5%). Isolated femoral tunnel malposition was the most common technical failure at 41.29%, no technical error at 38.53%, and isolated tibial tunnel placement failure at 2.75%. In all the patients evaluated, 28.44% (thirty-one patients) did not present a previous or current meniscal lesion; while 71.56% (seventy-eight patients) showed some type of injury. Graft choice was H-T-H autograft (30.28%), posterior tibial allograft (30.28%), anterior tibial allograft (19.27%), ST-RI autograft (11.01%), and other Achilles, fibular, and ST allografts (9.17%) Discussion: more studies will be necessary to determine if this failure rate persists despite our greater knowledge of the technique and various aspects of revision surgery. Level of Evidence: IV

ACL reconstruction associated with lateral extra-articular tenodesis with shared femoral tunnel

Recently, the anterolateral ligament has gained attention in knee surgery for its ability to improve rotational stability in ACL reconstructions. However, the lateral extra-articular tenodesis (LET) procedure, which involves creating a femoral tunnel using the modified Lemaire technique, presents a risk of overlapping with the femoral tunnel used in the ACL reconstruction. This can lead to complications and limit the success of the surgery. To avoid these issues without needing additional fixation, we describe an easily reproducible surgical technique in which a single femoral tunnel is shared for both ACL reconstruction and LET using the iliotibial tract

Recientemente, el ligamento anterolateral ha ganado atención en la cirugía de rodilla por su capacidad para mejorar la estabilidad rotacional en las reconstrucciones del LCA. Sin embargo, el procedimiento de tenodesis lateral extraarticular (TLE), que implica la creación de un túnel femoral utilizando la técnica modificada de Lemaire, presenta un riesgo de solapamiento con el túnel femoral utilizado en la reconstrucción del LCA. Esto puede provocar complicaciones y limitar el éxito de la cirugía. Para evitar estos problemas, sin necesidad de una fijación adicional, describimos una técnica quirúrgica fácilmente reproducible en la que se comparte un solo túnel femoral tanto para la reconstrucción del LCA como para LET utilizando el tracto iliotibial

Después de una cirugía de ligamento cruzado anterior, ¿cuándo puedo manejar? Evaluación postoperatoria de habilidades de conducción y de reacción de frenado / After anterior cruciate ligament surgery, when can I drive? Postoperative assessment of driving skills and braking reaction

Introducción: La mayoría de las personas que se someten a una reconstrucción del LCA están en edad de conducir, por lo tanto, es importante saber cuándo es seguro para el paciente reanudar la conducción. El objetivo de este trabajo es evaluar de manera prospectiva cuándo los pacientes recuperan las habilidades de manejo y de reacción de frenado después de la reconstrucción primaria de LCA, y compararlos con un grupo control de voluntarios sanos. Materiales y métodos: estudio prospectivo de una serie de pacientes que se sometieron a reconstrucción primaria del LCA utilizando injerto semitendinoso y recto interno. Se excluyeron pacientes en los que se empleó otro tipo de injerto o se les realizó otro gesto quirúrgico y laborales. Se evaluó la capacidad de volver a manejar de manera segura a las 2-3 semanas y a las 4-5 semanas postoperatorias mediante test de reacción simple y de resistencia a la monotonía, y se compararon los resultados con un grupo control de voluntarios sanos. Resultados: en total fueron ciento sesenta y seis pacientes, treinta fueron casos y ciento treinta y seis, controles. Se hallaron diferencias significativas (p = 0.03) entre los casos y controles en las pruebas realizadas tempranamente en cuanto a la aprobación, y no, de los test. Según el promedio en segundos obtenido en cada test realizado, se observan diferencias significativas en el primera prueba de resistencia a la monotonía (p = 0.0001) a favor del grupo control. Discusión: de acuerdo a la prueba de reacción simple y al test a la monotonía evaluados en nuestro trabajo, los pacientes que se someten a reconstrucción del LCA con autoinjertos de ST-RI están en condiciones de manejar un automóvil luego de las 4-5 semanas de la cirugía

Introduction: Most people who undergo ACL reconstruction are of driving age, it is important to know when it is safe for the patient to resume driving. The objective of this work was to prospectively evaluate when patients recover driving skills and brake reaction skills after ACL reconstruction and compare them with a control group of healthy volunteers. Materials and methods: prospective study of a series of patients who underwent primary ACL reconstruction using semitendinosus and medial rectus graft. Patients in whom another type of graft was used, or another surgical and labor gesture was performed, were excluded. The ability to return to driving safely at 2-3 weeks and 4-5 weeks postoperatively was evaluated using the simple reaction and resistance to monotony tests, and the results were compared with a control group of healthy volunteers.Results: a total of 166 patients, 30 are cases and 136 controls. Significant differences (p = 0.03) were found between cases and controls in the tests carried out early in terms of passing and not passing the tests. The relationship according to the average in seconds obtained in each test carried out, significant differences are observed in the first test of resistance to monotony (p = 0.0001) in favor of the control group. Discussion: according to the simple reaction test and the monotony test evaluated in our study, patients who undergo ACL reconstruction with ST-RI autografts are able to drive a car 4-5 weeks after surgery

Reconstrucción de ligamento cruzado anterior con isquiotibiales manteniendo su inserción tibial / ACL reconstruction with hamstring autograft maintaining tibial insertion

Introducción: La no desinserción tibial de semitendinoso-recto interno (ST-RI) parece constituir una opción para evitar la necrosis avascular en el proceso de ligamentización. El objetivo de nuestro trabajo es hacer una comparación entre ST-RI desinsertado versus ST-RI no desinsertado. Materiales y métodos: estudio comparativo, prospectivo, randomizado, doble ciego, para el que se formaron dos grupos. El grupo de estudio, conformado por treinta y ocho pacientes con plástica de LCA sin desinserción tibial de ST-RI; el grupo de control, de treinta y nueve pacientes con desinserción tibial. Se realizaron evaluaciones de RM a los seis meses del postoperatorio, se evaluaron el Coeficiente Señal ruido (CS) y la orientación del neoligamento en planos sagital, coronal y axial. La valoración clínica, a través de IKDC, Tegner Lysholm y KT-1000, fue efectuada por médicos en forma ciega.Resultados: el CS valorado por RM a los seis meses mostró diferencias significativas entre el grupo de estudio (14.4) y el de control (24.9) con un valor p <0.001. No existieron diferencias en cuanto a la orientación del injerto entre ambos grupos, ni en el plano sagital, coronal, ni axial. En cuanto al IKDC y Tegner Lysholm, sin diferencias entre grupos a los nueve meses. En el KT-1000 tampoco se encontraron diferencias entre grupos (p = 0.518).Discusión: la no desinserción tibial de ST-RI es una opción válida que podría evitar la fase de necrosis avascular de la ligamentización. Nuestros resultados, sustentados en RM, nos estimulan a utilizarla como una opción con cierta ventaja biológica.

Introduction: Non disinsertion of hamstring autograft tendons may result in avoiding cellular necrosis at the early stage of ligamentization process. The aim of this study was to compare between disinserted vs non disinserted hamstring autograft. Materials and methods: in this prospective, double-blind, randomised controlled trial, two groups were created. In the study group, hamstring tendon retraction (n=39) was performed. In the control group, maintaining tibial insertion (n=38) harvesting technique was used. Patients were evaluated with MRI after six months of follow-up. Graft maturity was evaluated with the signal-to-noise quotient (SNQ) and graft direction and orientation with sagittal, coronal, and axial views. Clinical outcomes were assessment of IKDC, Tegner-Lisholm activity level score and KT-1000 evaluation from a blind ortopaedic surgeon.Results: signal-to-noise quotient (SNQ) was significantly lower in non disinserted hamstring group (study group 14.4 vs control group 24.9-p = 0.001). There were no differences in graft direction between both groups. KT-1000 measurements showed no difference, the same as clinical outcomes assessment of IKDC and Tegner-Lisholm scores.Discussion: non disinserting hamstring tendons autograft is a valid option and may avoid the necrosis phase in ligamentization process. Our results, sustained on MRI imaging encourage us to use it with some biological advantage.

Application of Digital Therapy in Post-operative Rehabilitation of Knee Anterior Cruciate Ligament Reconstruction / 中国医疗器械杂志

OBJECTIVE@#Digital therapy is important in treating motor system disease. The outcome of digital therapy in post-operative rehabilitation of knee anterior cruciate ligament (ACL) reconstruction is assessed.@*METHODS@#142 patients are treated with digital rehabilitation therapy after ACL reconstruction. Patients' pain score, joint motion, lower limb function score, anxiety score are statistically analyzed. Patients' satisfaction, device usage and adverse events are documented.@*RESULTS@#At post-operative 1st day, 8th weeks, 12th weeks, pain score are 4, 2, 1, knee joint range of motion are 55°, 110°, 143°, lower limb function score are 18, 56, 76, anxiety score are 32.5, 26, 23.5 respectively. Patients' satisfaction are 9.4. Mean duration of device usage is (177.6±38.0) minutes per week. Rehabilitation-related and device-related adverse event does not happen.@*CONCLUSIONS@#Digital therapy promotes post-operative rehabilitation after ACL reconstruction.

Progress in evaluation of return to sports after anterior cruciate ligament reconstruction / 中国修复重建外科杂志

OBJECTIVE@#To summarize the evaluation methods of return to sports (RTS) after anterior cruciate ligament reconstruction (ACLR) in recent years, in order to provide reference for clinical practice.@*METHODS@#The literature related to the RTS after ACLR was searched from CNKI, Wanfang, PubMed, and Foreign Medical Information Resources Retrieval Platform (FMRS) databases. The retrieval range was from 2010 to 2023, and 66 papers were finally included for review. The relevant literature was summarized and analyzed from the aspects of RTS time, objective evaluation indicators, and psychological evaluation.@*RESULTS@#RTS is the common desire of patients with ACL injury and doctors, as well as the initial intention of selecting surgery. A reasonable and perfect evaluation method of RTS can not only help patients recover to preoperative exercise level, but also protect patients from re-injury. At present, the main criterion for clinical judgement of RTS is time. It is basically agreed that RTS after 9 months can reduce the re-injury. In addition to time, it is also necessary to test the lower limb muscle strength, jumping, balance, and other aspects of the patient, comprehensively assess the degree of functional recovery and determine the different time of RTS according to the type of exercise. Psychological assessment plays an important role in RTS and has a good clinical predictive effect.@*CONCLUSION@#RTS is one of the research hotspots after ACLR. At present, there are many related evaluation methods, which need to be further optimized by more research to build a comprehensive and standardized evaluation system.

Risk factors for contralateral anterior cruciate ligament injury after primary anterior cruciate ligament reconstruction / 中国修复重建外科杂志

OBJECTIVE@#To investigate the risk factors of contralateral anterior cruciate ligament (ACL) injury after primary ACL reconstruction.@*METHODS@#A retrospective review was conducted on the 716 patients with ACL injury who received primary ACL reconstruction surgery and met the selection criteria between January 2012 and September 2018. After a mean follow-up period of 7.6 years (range, 4-10 years), 65 patients (9.1%) experienced contralateral ACL injury (injured group) and 651 patients (90.9%) did not (uninjured group). There was no significant difference in age, body mass index, and preoperative Lachman test degree between groups ( P>0.05). However, the proportion of female in the injured group was significantly higher than that of male ( P<0.05), and the preoperative posterior tibial slope (PTS) was significantly higher than that of the uninjured group ( P<0.05). Using the outcome of contralateral ACL injury as the dependent variable, the clinical data of the patient was first used as the independent variable, and univariate COX regression was used to analyze the prognostic influencing factors. Then, the indicators with differences in univariate COX regression were used as the independent variable, and multivariate COX regression was used to analyze the independent risk factors affecting prognosis. Log-Rank (Mantel-Cox) test was used to test and analyze the occurrence time of contralateral ACL injury in patients of different genders; X-tile software was used to analyze the occurrence time of contralateral ACL injury in patients with different PTS using Log-Rank (Mantel-Cox) test and PTS cut-off values.@*RESULTS@#Univariate COX regression analysis showed that gender and PTS were influence factors for contralateral ACL injury ( P<0.05); further multivariate COX regression analysis showed that female and increased PTS were independent risk factors for contralateral ACL injury ( P<0.05). The Log-Rank (Mantel-Cox) test results showed that the contralateral ACL injury occurred in female at 8.853 (8.600, 9.106) years, which was significantly shorter than that in male [9.661 (9.503, 9.819) years] ( χ 2=20.323, P<0.001). Using X-tile software to analyze the cut-off value of PTS, it was found that the cut-off value of PTS for contralateral ACL injury was 10.92°. According to the Log-Rank (Mantel-Cox) test, it was found that the contralateral ACL injury occurred in 5.762 (4.981, 6.543) years in patients with PTS≥10.92°, which was significantly shorter than patients with PTS<10.92° [9.751 (9.650, 9.853) years]( χ 2 =302.479, P<0.001).@*CONCLUSION@#Female and PTS≥10.92° after primary ACL reconstruction are independent risk factors for contralateral ACL injury.

Three-dimensional kinematic analysis of knee joint after anterior cruciate ligament reconstruction with personalized femoral positioner based on apex of deep cartilage / 中国修复重建外科杂志

OBJECTIVE@#To investigate the changes of knee joint kinematics after anterior cruciate ligament (ACL) reconstruction assisted by personalized femoral positioner based on the apex of deep cartilage (ADC).@*METHODS@#Between January 2021 and January 2022, a total of 40 patients with initial ACL rupture who met the selection criteria were randomly divided into the study group (using the personalized femoral positioner based on ADC design to assist ACL reconstruction) and the control group (not using the personalized femoral positioner to assist ACL reconstruction), with 20 patients in each group. Another 20 volunteers with normal knee were collected as a healthy group. There was no significant difference in gender, age, body mass index, and affected side between groups ( P>0.05). Gait analysis was performed at 3, 6, and 12 months after operation using Opti _ Knee three-dimensional knee joint motion measurement and analysis system, and the 6 degrees of freedom (flexion and extension angle, varus and valgus angle, internal and external rotation angle, anteroposterior displacement, superior and inferior displacement, internal and external displacement) and motion cycle (maximum step length, minimum step length, and step frequency) of the knee joint were recorded. The patients' data was compared to the data of healthy group.@*RESULTS@#In the healthy group, the flexion and extension angle was (57.80±3.45)°, the varus and valgus angle was (10.54±1.05)°, the internal and external rotation angle was (13.02±1.66)°, and the anteroposterior displacement was (1.44±0.39) cm, the superior and inferior displacement was (0.86±0.20) cm, and the internal and external displacement was (1.38±0.39) cm. The maximum step length was (51.24±1.29) cm, the minimum step length was (45.69±2.28) cm, and the step frequency was (12.45±0.47) step/minute. Compared with the healthy group, the flexion and extension angles and internal and external rotation angles of the patients in the study group and the control group decreased at 3 months after operation, and the flexion and extension angles of the patients in the control group decreased at 6 months after operation, and the differences were significant ( P<0.05); there was no significant difference in the other time points and other indicators when compared with healthy group ( P>0.05). In the study group, the flexion and extension angles and internal and external rotation angles at 6 and 12 months after operation were significantly greater than those at 3 months after operation ( P<0.05), while there was no significant difference in the other indicators at other time points ( P>0.05). There was a significant difference in flexion and extension angle between the study group and the control group at 6 months after operation ( P<0.05), but there was no significant difference of the indicators between the two groups at other time points ( P>0.05).@*CONCLUSION@#Compared with conventional surgery, ACL reconstruction assisted by personalized femoral positioner based on ADC design can help patients achieve more satisfactory early postoperative kinematic results, and three-dimensional kinematic analysis can more objectively and dynamically evaluate the postoperative recovery of knee joint.

Effectiveness of anterior cruciate ligament reconstruction with personalized femoral locator based on apex of deep cartilage / 中国修复重建外科杂志

OBJECTIVE@#To investigate the effectiveness of anterior cruciate ligament (ACL) reconstruction assisted by personalized femoral locator based on the apex of deep cartilage (ADC) combined with patient imaging data.@*METHODS@#Between January 2021 and January 2022, a total of 40 patients with primary ACL rupture were selected and randomly divided into study group (ACL reconstruction assisted by personalized femoral locator based on ADC) and control group (ACL reconstruction assisted by intraoperative fluoroscopy and traditional femoral locator), with 20 cases in each group. There was no significant difference in gender, age, body mass index, affected side, cause of injury, and preoperative International Knee Documentation Committee (IKDC) score, Lyshlom score, and Tegner score between the two groups ( P>0.05). IKDC score, Lyshlom score, and Tegner score were used to evaluate the functional recovery of the affected knee before operation and at 3, 6, and 12 months after operation. CT scan and three-dimensional reconstruction were performed before and after operation to measure the horizontal distance from ADC to the anterior cartilage margin (L) and the horizontal distance from ADC to the center of the femoral canal (I), and the anteroposterior position of the bone canal (R) was calculated by I/L; the distance from the center to the distal cartilage margin (D) was measured on the two-dimensional cross section; the R value and D value were compared between the two groups.@*RESULTS@#The operation time of the study group was significantly less than that of the control group [ MD=-6.90 (-8.78, -5.03), P<0.001]. The incisions of the two groups healed by first intention, and no complication such as intra-articular infection, nerve injury, and deep vein thrombosis of lower limbs occurred. There was no significant difference in the R value and D value between the preoperative simulated positioning and the actual intraoperative positioning in the study group [ MD=0.52 (-2.85, 3.88), P=0.758; MD=0.36 (-0.39, 1.11), P=0.351]. There was no significant difference in the actual intraoperative positioning R value and D value between the study group and the control group [ MD=1.01 (-2.57, 4.58), P=0.573; MD=0.24 (-0.34, 0.82), P=0.411]. The patients in both groups were followed up 12-13 months (mean, 12.4 months). The IKDC score, Lysholm score, and Tegner score of the two groups increased gradually with time, and there were significant differences between pre- and post-operation ( P<0.05). There was no significant difference in the scores between the two groups at each time point after operation ( P>0.05).@*CONCLUSION@#The personalized femoral locator based on ADC can accurately assist the femoral tunnel positioning in ACL reconstruction, which can shorten the operation time when compared with traditional surgical methods, and achieve satisfactory early effectiveness.