Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology最新文献

{"title":"Comparative meta-analysis of TightRope vs. hook plate for acromioclavicular joint dislocation","authors":"Manuel Alejandro Villagrán-Luján ,&nbsp;Alejandro Alarcon-Mendoza ,&nbsp;Edgar Azael Perez-Gutierrez ,&nbsp;Manuel Alberto Gutierrez-Moreno ,&nbsp;Nadia Karina Portillo-Ortiz ,&nbsp;Edmundo Berumen-Nafarrate","doi":"10.1016/j.asmart.2025.04.001","DOIUrl":"10.1016/j.asmart.2025.04.001","url":null,"abstract":"<div><h3>Objective</h3><div>This study aims to compare the clinical and radiographic outcomes of the tight-rope system versus internal fixation with a hook plate for treating grade III-VI acute acromioclavicular dislocation.</div></div><div><h3>Methods</h3><div>Relevant studies were identified by searching PubMed, Cochrane, and Google Scholar, from January 2017 to December 2023. The primary focus of the study revolved around evaluating various factors such as the Constant Score, University of California Los Angeles (UCLA) Shoulder Score, Visual Analogue Scale (VAS), coracoclavicular distance (CCD), and incidences of complications. The analysis involved determining the weighted mean difference (WMD) along with its corresponding 95 % confidence intervals (95 % CIs), or risk ratios (RR) with 95 % CIs to quantify the collected data.</div></div><div><h3>Results</h3><div>Eight studies comprising 484 participants were included. Significant differences were observed in the Constant-Murley score between groups. However, no disparities were found in UCLA scores, VAS scores, or CCD improvement. Subgroup analyses also yielded consistent results.</div></div><div><h3>Conclusions</h3><div>Both treatment modalities demonstrated similar clinical and radiographic efficacy in alleviating pain, enhancing acromioclavicular joint function, and correcting coracoclavicular distance. Nevertheless, the TightRope system exhibited additional advantages, including reduced reoperation rates and lower risk of subacromial distal clavicle osteolysis.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"42 ","pages":"Pages 8-14"},"PeriodicalIF":1.5,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection and classification of supraspinatus pathologies on shoulder magnetic resonance images using a code-free deep learning application","authors":"Onur Engin ,&nbsp;Ceren Durmaz Engin ,&nbsp;Atilla Hikmet Çilengir ,&nbsp;Berna Dirim Mete","doi":"10.1016/j.asmart.2025.04.005","DOIUrl":"10.1016/j.asmart.2025.04.005","url":null,"abstract":"<div><h3>Objective</h3><div>To evaluate the performance of a code free deep learning (CFDL) application in diagnosing supraspinatus tendon pathologies on shoulder magnetic resonance imaging (MRI) images.</div></div><div><h3>Design</h3><div>This retrospective cross-sectional study included patients with supraspinatus MRI showing partial or full-thickness tears and tendinosis, with patients having normal findings as the control group. MRI images were processed in the LobeAI application using transfer learning with ResNet-50 V2 for model development. Models were built to differentiate each pathology from normal and full-thickness tears from partial tears.</div></div><div><h3>Results</h3><div>The ML models developed using the LobeAI application demonstrated the ability to differentiate between normal shoulder MRI images and partial tears, full-thickness tears, and tendinosis with sensitivities of 93.75 %, 100 %, and 100 %, respectively, and specificities of 43.75 %, 62.5 %, and 18.75 %. The model designed to classify partial vs. full-thickness tears achieved an accuracy of 34.38 %. The model incorporating all pathological images compared to normal MRI images exhibited an accuracy of 37.50 % and a weighted F1 score of 0.32.</div></div><div><h3>Conclusion</h3><div>The results of the study suggest that, although CFDL applications may be promising for the initial detection of supraspinatus pathologies, their current iteration has limitations that must be resolved before they can be reliably integrated into clinical practice.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"42 ","pages":"Pages 1-7"},"PeriodicalIF":1.5,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of limb position on femoral neck anteversion angle measurement during computed tomography imaging","authors":"Rika Shigemoto,&nbsp;Takehiko Matsushita,&nbsp;Kyohei Nishida,&nbsp;Kanto Nagai,&nbsp;Yuta Nakanishi,&nbsp;Tetsuya Yamamoto,&nbsp;Tomoyuki Matsumoto,&nbsp;Noriyuki Kanzaki,&nbsp;Yuichi Hoshino,&nbsp;Ryosuke Kuroda","doi":"10.1016/j.asmart.2025.04.003","DOIUrl":"10.1016/j.asmart.2025.04.003","url":null,"abstract":"<div><h3>Background</h3><div>The femoral neck anteversion angle has been used as a surgical indicator for hip and patellofemoral joint disorders. However, the influence of limb position on femoral neck anteversion angle measurements during imaging remains unclear. Therefore, this study aimed to investigate the influence of limb position on femoral neck anteversion angle measurements.</div></div><div><h3>Methods</h3><div>Computed tomography images of 20 femurs from 10 patients were obtained. The angle between the line passing through the center of the femoral head and the center of the femoral neck and the tangential line of the femoral posterior condyles on axial slices was measured as the femoral neck anteversion angle. Raw femoral neck anteversion angle data was defined as the original femoral neck anteversion angle. The cutting direction of the axial plane was changed from −20° to 20° in 5° increments to simulate limb position changes for each of the following measurements: hip flexion/extension, abduction/adduction angles, and their combined directions. The femoral neck anteversion angle was measured under each condition, and the change in the angle was calculated. The correlation between hip angle and femoral neck anteversion angle change was analysed by Spearman's rank correlation coefficient.</div></div><div><h3>Results</h3><div>The mean original femoral neck anteversion angle was 17.6°. There was a strong negative correlation between hip flexion/extension change and femoral neck anteversion angle change (<em>r</em> = −0.96, p &lt; 0.001). There was a weak correlation between hip adduction/abduction change and femoral neck anteversion angle change (<em>r</em> = 0.35, p &lt; 0.001). The average maximum potential difference in femoral neck anteversion angle measurement combining flexion/extension and abduction/adduction was 21.0° ± 4.9°.</div></div><div><h3>Conclusions</h3><div>The femoral neck anteversion angle changed in association with changes in limb position, particularly with hip flexion and extension. Careful attention to limb position and conditions of the slice is needed to consistently evaluate the femoral neck anteversion angle.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"40 ","pages":"Pages 29-34"},"PeriodicalIF":1.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cross-cultural adaptation and validation of the Vietnamese version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) in patients with knee osteoarthritis","authors":"Thanh-Van Le ,&nbsp;Massimo Penta ,&nbsp;Thi Bich Hanh Tran ,&nbsp;Long Bien Tran ,&nbsp;Minh Sang Nguyen ,&nbsp;Bénédicte Schepens","doi":"10.1016/j.asmart.2025.04.002","DOIUrl":"10.1016/j.asmart.2025.04.002","url":null,"abstract":"<div><h3>Background</h3><div>Knee osteoarthritis (KOA) is common in Vietnam, affecting about 34 % of individuals over 40 years of age. The Knee Injury and Osteoarthritis Outcome Score (KOOS) is an internationally recognized patient-reported outcome used to assess the impact of KOA but it is not yet available in Vietnamese.</div></div><div><h3>Objective</h3><div>This study aimed to translate the KOOS into Vietnamese and assess the psychometric properties of the translation (KOOS-V).</div></div><div><h3>Methods</h3><div>The translation process involved forward/back translation, expert review and cognitive interviews for pretesting. Content validity was assessed by seven experts using the Content validity Index (CVI). A sample of 133 Vietnamese KOA patients (mean age: 63.7 years, 83 % female) completed the KOOS-V, Short Form 36 Health Survey (SF-36) and Numeric Pain Rating Scale (NPRS), and 67 of them were re-assessed after 5–8 days. Psychometric analyses included internal consistency, test-retest reliability, construct validity and cross-cultural comparison of KOOS-V subscales.</div></div><div><h3>Results</h3><div>KOOS-V exhibited excellent content validity (CVI = 0.86–1.00), satisfactory internal consistency (Cronbach's α = 0.70–0.98) and good to excellent test-retest reliability (ICC = 0.77–0.90). Construct validity was confirmed by moderate to strong correlations with SF-36 Physical Functioning (Spearman's ρ = 0.66 to 0.82) and moderate correlations with NPRS (ρ = −0.49 to −0.62). The cross-cultural comparison showed that the KOOS subscales in Vietnam presents the same challenge as in other cultures.</div></div><div><h3>Conclusions</h3><div>The KOOS-V is a reliable, valid tool for assessing the functional impact of KOA in Vietnamese patients, contributing to its broader use worldwide in clinical and research settings.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"40 ","pages":"Pages 23-28"},"PeriodicalIF":1.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Treatment of a medial plica in the knee among German knee surgeons – The Plica Survey","authors":"Svea Faber ,&nbsp;Philipp W. Winkler ,&nbsp;Ralf Henkelmann ,&nbsp;Theresa Diermeier ,&nbsp;Wolf Petersen ,&nbsp;Maurice Balke ,&nbsp;Sebastian Metzlaff ,&nbsp;Sebastian Colcuc ,&nbsp;Gerald Zimmermann ,&nbsp;Philip P. Roessler ,&nbsp;Thomas R. Niethammer","doi":"10.1016/j.asmart.2025.01.003","DOIUrl":"10.1016/j.asmart.2025.01.003","url":null,"abstract":"<div><h3>Purpose</h3><div>The MPP (medial patella plica) has garnered increasing clinical attention due to its potential role in patellofemoral pain syndromes. While often an anatomical relic without pathological significance, inflammation or mechanical irritation of this structure can lead to plica syndrome, causing significant clinical symptoms. The purpose of this study was to analyze the current care situation regarding plica syndrome of the knee among a large number of experienced knee surgeons.</div></div><div><h3>Methods</h3><div>An online survey targeting the current care practices for plica syndrome was conducted among members of the German Knee Society (DKG). The survey was comprised 15 questions regarding diagnostic and treatment approaches. Data were collected anonymously and analyzed using IBM SPSS Statistics Version 26.0.</div></div><div><h3>Results</h3><div>A total of 238 surgeons participated. Most respondents (84 %) agreed that plica syndrome could cause patellofemoral pain. The typical patient profile was predominantly female (77.7 %), aged 21–30 years (57.6 %). The majority of surgeons use magnetic resonance imaging (MRI) combined with clinical examination (58.0 %) to diagnose an MPP, and 54.2 % of surgeons resected the plica upon finding significant intraoperative evidence of impact on the patellofemoral joint. Hemarthrosis and persistent pain were the most reported complications, though 83.2 % of surgeons observed a complication rate below 11 %.</div></div><div><h3>Conclusion</h3><div>This study provides a comprehensive overview of current practices and opinions regarding plica syndrome among experienced German knee surgeons. It emphasizes the need for further research to standardize diagnostic and therapeutic approaches, aiming to optimize patient outcomes in plica-related knee pathologies.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"40 ","pages":"Pages 18-22"},"PeriodicalIF":1.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term outcomes after fixation of pure chondral fragment from the femoral trochlea in adolescents –three case reports-","authors":"Shuto Yamashita ,&nbsp;Ryohei Uchida ,&nbsp;Tomohiko Matsuo ,&nbsp;Norimasa Nakamura ,&nbsp;Shuji Horibe ,&nbsp;Yukiyoshi Toritsuka","doi":"10.1016/j.asmart.2025.01.004","DOIUrl":"10.1016/j.asmart.2025.01.004","url":null,"abstract":"<div><h3>Purpose</h3><div>Pure chondral fragments in adolescents are very rare, especially, fragments from the femoral trochlea. While satisfactory short-term outcomes after fixation were reported in several reports, long-term outcomes have still been unknown. Our objective is to evaluate the long-term outcomes after fixation for pure chondral fragment from the trochlea.</div></div><div><h3>Materials &amp; Methods</h3><div>Three adolescent patients (aged 13, 14, and 14 years) with pure chondral fragment from the trochlea underwent internal fixation using bio-absorbable pins at our institution. All patients were followed up for more than eight years. At final follow-up, all three patients were assessed by radiographs and magnetic resonance imaging (MRI) as well as clinical scores, including Lysholm questionnaires, and IKDC (International Knee Documentation Committee) score, KOOS (Knee injury and Osteoarthritis Outcome Score).</div></div><div><h3>Results</h3><div>At final follow-up (12, 8, and 9 years postoperatively) all three patients were able to continue to play sports without any restriction. Radiographs showed no osteoarthritic changes and MRI showed good integration with the surrounding native cartilage and smooth surface in all cases. In all cases, Lysholm score and IKDC score were over 95, and most of KOOS were over 90.</div></div><div><h3>Conclusion</h3><div>Fixation for pure chondral fragment from the femoral trochlea resulted in successful healing in adolescent patients with excellent radiographic and clinical outcomes in the long-term.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"40 ","pages":"Pages 12-17"},"PeriodicalIF":1.5,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using deep learning for ultrasound images to diagnose chronic lateral ankle instability with high accuracy","authors":"Masamune Kamachi,&nbsp;Kohei Kamada,&nbsp;Noriyuki Kanzaki,&nbsp;Tetsuya Yamamoto,&nbsp;Yuichi Hoshino,&nbsp;Atsuyuki Inui,&nbsp;Yuta Nakanishi,&nbsp;Kyohei Nishida,&nbsp;Kanto Nagai,&nbsp;Takehiko Matsushita,&nbsp;Ryosuke Kuroda","doi":"10.1016/j.asmart.2025.01.001","DOIUrl":"10.1016/j.asmart.2025.01.001","url":null,"abstract":"<div><div>The purpose of this study is to calculate diagnostic accuracy of chronic lateral ankle instability (CLAI) from a confusion matrix using deep learning (DL) on ultrasound images of anterior talofibular ligament (ATFL). The study included 30 ankles with no history of ankle sprains (control group), and 30 ankles diagnosed with CLAI (injury group). A total of 2000 images were prepared for each group by capturing ultrasound videos visualizing the fibers of ATFL under the anterior drawer stress. The images of 20 feet in each group were randomly selected and used for training data and the images of remaining 10 feet in each group were used as test data. Transfer learning was performed using 3 pretraining DL models, and the accuracy, precision, recall (sensitivity), specificity, F-measure, and the area under the receiver operating characteristic curve (AUC) were calculated based on the confusion matrix. The important features were visualized using occlusion sensitivity, a method for visualizing areas that are important for model prediction. DL was able to diagnose CLAI using ultrasound imaging with very high accuracy and AUC in three different learning models. In visualization of the region of interest, AI focused on the substance of the ATFL and its attachment on the fibula for the diagnosis of CLAI.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"40 ","pages":"Pages 1-6"},"PeriodicalIF":1.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes in the position of the medial meniscus owing to degenerative meniscus tears","authors":"Tomoyuki Kanayama,&nbsp;Yasushi Takata,&nbsp;Yoshihiro Ishida,&nbsp;Naoki Takemoto,&nbsp;Manase Nishimura,&nbsp;Satoru Demura,&nbsp;Junsuke Nakase","doi":"10.1016/j.asmart.2025.01.002","DOIUrl":"10.1016/j.asmart.2025.01.002","url":null,"abstract":"<div><h3>Background</h3><div>While meniscal extrusion has been recognized as a key factor in meniscal dysfunction and osteoarthritis (OA) development, the specific movement of the posterior horn of the medial meniscus (MM) during extrusion, particularly in early-stage OA, remains unexplored. Therefore, in this study, we investigated the position of the MM in patients with medial knee pain and a Kellgren–Lawrence grade ≤1, investigating the relationship between meniscal extrusion and degenerative tears. We hypothesized that the MM extrusion (MME) would be larger when degenerative tears are present; the anterior horn would move posteriorly, and the posterior horn would move anteriorly, accordingly.</div></div><div><h3>Methods</h3><div>A total of 181 knees (mean age 61.7 ± 12.1 years; 97 men and 84 women) were included. Simple radiographs were used to measure the weight-bearing line ratio and medial proximal tibia angle. Magnetic resonance imaging was used to measure the medial proximal tibia slope, medial meniscus extrusion, anterior and posterior horn position, and degenerative tears on the posterior segment of the medial meniscus. Those with degenerative tears were designated as group T and those without were designated as group C. Student's t-test and Pearson's χ² test were performed to compare groups T and C. Statistical significance was set at p &lt; 0.05.</div></div><div><h3>Results</h3><div>Group T had a significantly larger medial posterior tibial slope (group T: 7.4 ± 2.3°; group C: 6.6 ± 2.2°, p = 0.010) and medial meniscus extrusion (group T: 2.7 ± 1.4 mm; group C: 1.9 ± 1.2 mm, p &lt; 0.001) scores compared with group C. Furthermore, the posterior point of the anterior horn (group T: 16.3 ± 5.0 %; group C: 14.3 ± 3.8 %, p = 0.004) and anterior point of the posterior horn (group T: 36.4 ± 7.1 %; group C:26.9 ± 5.9 %, p &lt; 0.001) were significantly larger in group T than in group C.</div></div><div><h3>Conclusion</h3><div>Degenerative MM tears cause not only MME but also an anteroposterior shift.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"40 ","pages":"Pages 7-11"},"PeriodicalIF":1.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reviewer Acknowledgement 2024","authors":"","doi":"10.1016/j.asmart.2025.01.005","DOIUrl":"10.1016/j.asmart.2025.01.005","url":null,"abstract":"","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"39 ","pages":"Page I"},"PeriodicalIF":1.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Neural structural alterations correlates of quadriceps muscle strength deficits in patients after anterior cruciate ligament reconstruction","authors":"Le Yu ,&nbsp;Shanshan Zheng ,&nbsp;Yushi Chen ,&nbsp;Xiao'ao Xue ,&nbsp;Zikun Wang ,&nbsp;JiaYan Cheng ,&nbsp;Yang Sun ,&nbsp;He Wang ,&nbsp;Yinghui Hua","doi":"10.1016/j.asmart.2024.11.001","DOIUrl":"10.1016/j.asmart.2024.11.001","url":null,"abstract":"<div><h3>Background</h3><div>Persistent maladaptive changes of corticospinal tract (CST) and quadriceps strength deficits exist in patients with anterior cruciate ligament reconstruction (ACLR). This study aimed to investigate the relationships between the structural alterations of CST and quadriceps muscle strength deficits in patients with ACLR.</div></div><div><h3>Methods</h3><div>Twenty-nine participants who had undergone unilateral ACLR (29 males; age = 32.61 ± 6.72 years) were enrolled in a cross-sectional investigation. We chose CST as a region of interest and performed diffusion tensor imaging (DTI) that measured the microstructure of white matter tracts. Maximal voluntary isometric quadriceps muscle strength was assessed using a hand-held dynamometer. Simple and partial correlation analyses were performed between the DTI outcomes and quadriceps muscle strength deficits in patients with ACLR before and after controlling for age, sex, BMI, Tegner activity score, and graft type. Sub-group analyses were also performed to investigate the relationships between the DTI outcomes of CST structure and quadriceps muscle strength deficits according to the graft type before and after controlling for age, sex, BMI, and Tegner activity score.</div></div><div><h3>Results</h3><div>Lower limb symmetry index (LSI) of quadriceps muscle strength was associated with a higher ratio of radial diffusivity (RD, r = −0.379, p = 0.042) in corticospinal tracts of the injured hemisphere to those of the non-injured hemisphere in ACLR patients after controlling for age, BMI, Tegner activity score and graft type. In subgroup analyses of ACLR patients with hamstring autografts, we found that higher injured quadriceps muscle strength was associated with higher axial diffusivity (AD, r = 0.616, p = 0.033) of CST structure and lower LSI of quadriceps muscle strength was associated with higher ratio of mean diffusivity (MD, r = −0.682, p = 0.014) and RD (r = −0.759, p = 0.004) in corticospinal tracts of the injured hemisphere to those of the non-injured hemisphere in ACLR patients after controlling for age, BMI, Tegner activity score.</div></div><div><h3>Conclusion</h3><div>Decreased integrity (higher ratio of RD) of CST microstructure in ACLR patients was significantly associated with lower quadriceps limb symmetry index, which hinted that quadriceps muscle strength deficits of injured side may be a demyelinating process of CST microstructure in ACLR.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"39 ","pages":"Pages 30-36"},"PeriodicalIF":1.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11714134/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142956579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}