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

{"title":"Increased posterior tibial slope leads to increased risk of graft rupture in anterior cruciate reconstruction: a retrospective matched case-control study","authors":"Wing-Leong Chan ,&nbsp;Keith Hay-Man Wan ,&nbsp;Eugene Pak-Lin Ng ,&nbsp;Christine Yuen-Shan Lai ,&nbsp;Richard Hin-Lun Lee ,&nbsp;Kevin Kwun-Hung Wong ,&nbsp;Kam-Kwong Wong","doi":"10.1016/j.asmart.2025.10.001","DOIUrl":"10.1016/j.asmart.2025.10.001","url":null,"abstract":"<div><h3>Purpose</h3><div>To investigate influence of an increased posterior tibial slope (PTS) on anterior cruciate ligament (ACL) reconstruction graft failure amongst ethnic Chinese in local subjects.</div></div><div><h3>Methods</h3><div>A total of number of 477 patients who had primary ACL reconstruction done from January 2008 to December 2021 were retrospectively reviewed. Ethnic Chinese patient graft size &gt;7 mm using Hamstring graft by single bundle technique were included. Patients with age more than 50 years old, known medical comorbidities on graft rupture such as diabetes, renal failure, previous contralateral ACL injury, previous ACL revision surgery, concomitant multi-ligamental injuries, high energy trauma such as road traffic accident, contact sport injury were excluded. Included patient with graft rupture and revision surgery done will be matched and compared with those without graft rupture after primary surgery. PTS of both groups of patients will be measured on their true lateral knee X-Ray before their primary ACL reconstruction. Data of both groups (age, sex ratio, graft size, PTS angle) will be compared through Fisher exact test, <em>t</em>-Test and logistic regression.</div></div><div><h3>Results</h3><div>The incidence rate on ACL revision in our local ethnic Chinese patient was around 4.6 % (22 cases). 25 revision cases were matched with 125 control cases, with no statistically significant difference on sex ratio, age at primary operation, graft size among both groups. PTS of revision patient group had significantly higher PTS angle than control group (95 % confident interval, 10.7° vs 8.6°; P &lt; 0.01). Logistic regression showed PTS as a significant factor affecting graft rupture outcome. Odd ratios of graft rupture due to increased PTS were 2.3 (P &lt; 0.01), with increased risk when PTS ≥11.6° shown in logistic regression.</div></div><div><h3>Conclusions</h3><div>High PTS (&gt;11.6°) will lead to increased ACL graft rupture risk and revision surgery amongst ethnic Chinese in Hong Kong. Patients with high PTS noted in pre-operative status should have their operation planned carefully and may require additional procedure such as slope-correcting operation and lateral augmentation to reduce risk of graft rupture.</div></div><div><h3>Level of evidence</h3><div>Level III, retrospective comparative study.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"42 ","pages":"Pages 81-85"},"PeriodicalIF":1.4,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145415515","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":"Prevalence of os acromiale in Japanese population: Comparison between patients with shoulder pain and asymptomatic subjects","authors":"Shinji Kawaguchi ,&nbsp;Shoji Fukuta ,&nbsp;Jun Kawamata ,&nbsp;Koichi Sairyo","doi":"10.1016/j.asmart.2025.09.002","DOIUrl":"10.1016/j.asmart.2025.09.002","url":null,"abstract":"<div><h3>Background</h3><div>Os acromiale, a condition in which the acromial apophysis fails to fuse, and its prevalence varies across ethnic groups. Although higher rates have been reported in African and Caucasian populations, data are scarce for Asian populations, particularly for Japanese individuals. This study aimed to determine the prevalence of os acromiale in a Japanese population and its association with rotator cuff-related symptoms.</div></div><div><h3>Methods</h3><div>We retrospectively identified 2221 shoulders of 1411 Japanese subjects aged over 25 years who underwent computed tomography (CT) of the shoulder at our institution between September 2010 and March 2023. The shoulders were divided into an asymptomatic group, which included 1386 shoulders of 693 patients with no documented history of shoulder pain who underwent chest CT for non-orthopedic reasons, and a symptomatic group, which included 836 shoulders of 800 patients who underwent arthroscopic surgery for rotator cuff tears or tendinopathy. Os acromiale was identified using three-dimensional CT and classified by location.</div></div><div><h3>Results</h3><div>Os acromiale was identified in 16 shoulders (0.72 %), 10 of which were classified as pre-acromial and 6 as meso-acromial. The prevalence was significantly higher in the symptomatic group than in the asymptomatic group (1.56 % vs 0.22 %, p = 0.002). No significant difference was observed according to sex or laterality.</div></div><div><h3>Conclusion</h3><div>The prevalence of os acromiale in Japanese was 0.72 %. The prevalence of this condition is markedly lower in this population than in African and Caucasian populations. However, its significantly higher occurrence in symptomatic patients suggests a potential role in shoulder pain associated with rotator cuff lesions. These results emphasize the importance of recognizing os acromiale as a possible anatomical contributor to shoulder symptoms in clinical practice.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"42 ","pages":"Pages 86-89"},"PeriodicalIF":1.4,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145415516","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":"Does hip bone morphology differ depending on the presence of cam lesions in borderline developmental dysplasia of the hip?","authors":"Yuichi Kuroda,&nbsp;Tomoyuki Kamenaga,&nbsp;Shotaro Araki,&nbsp;Masanori Tsubosaka,&nbsp;Naoki Nakano,&nbsp;Tomoyuki Matsumoto,&nbsp;Shinya Hayashi,&nbsp;Ryosuke Kuroda","doi":"10.1016/j.asmart.2025.06.001","DOIUrl":"10.1016/j.asmart.2025.06.001","url":null,"abstract":"<div><h3>Background</h3><div>The purpose of this study was to divide patients with borderline developmental dysplasia of the hip (BDDH) into two groups according to the presence of Cam lesions, and compare radiographs related to bone morphology between them.</div></div><div><h3>Methods</h3><div>We retrospectively analyzed consecutive patients with BDDH who underwent hip arthroscopy (HA) or periacetabular osteotomy (PAO) at our institution between October 2013 and October 2019. The patients were classified into two groups according to the presence of Cam lesions. Radiographic measurements including lateral center-edge angle (LCEA), acetabular roof obliquity (ARO), cliff sign, femoral epiphyseal acetabular roof (FEAR) index, vertical center anterior angle (VCA), and Sourcil Index were compared between the two groups. The cutoff values were calculated using a receiver operating characteristic curve.</div></div><div><h3>Results</h3><div>Sixty-nine hips were analyzed in this study (Cam+: 34, Cam-: 35). The ARO and FEAR index were significantly higher in the Cam-group (P &lt; 0.001, P &lt; 0.001). The LCEA, VCA, and Sourcil Index was significantly lower in the Cam-group than that in the Cam + group (P &lt; 0.001, P &lt; 0.001, P &lt; 0.001). The cutoff values were 21.0° for LCEA, 15.1° for the ARO, 22.5° for the VCA angle, −2.2° for the FEAR index, and 49.5° for the Sourcil Index.</div></div><div><h3>Conclusion</h3><div>Patients with BDDH exhibited significant differences in bone morphology depending on the presence of Cam lesions. Moreover, those without Cam lesions displayed similarities to patients with DDH.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"41 ","pages":"Pages 14-19"},"PeriodicalIF":1.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535885","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":"Hyperuricemia predicts adverse clinical outcomes after arthroscopic microfracture of osteochondral lesions of the talus","authors":"Yuanqiang Li ,&nbsp;Zhenyu Wang ,&nbsp;Guo Zheng ,&nbsp;Lin Ma ,&nbsp;Xin Xin Li ,&nbsp;Yan Liang ,&nbsp;Xinyu Xie ,&nbsp;Xiaolin Zhang ,&nbsp;Chengsong Yuan ,&nbsp;Wan Chen","doi":"10.1016/j.asmart.2025.04.004","DOIUrl":"10.1016/j.asmart.2025.04.004","url":null,"abstract":"<div><h3>Purpose</h3><div>To investigate the correlation of serum uric acid levels with the clinical outcomes of arthroscopic microfracture in osteochondral lesions of the talus (OLTs) and determine the cut-off point for predicting outcomes.</div></div><div><h3>Methods</h3><div>A total of 134 OLTs patients who underwent arthroscopic microfracture from November 2008 to June 2019 were included: 42 in the hyperuricemia group (≥ 420 μmol/L) and 92 in the non-hyperuricemia group (&lt; 420 μmol/L). Clinical characteristics recorded and analyzed included Visual Analog Scale (VAS score), American Orthopaedic Foot &amp; Ankle Society score (AOFAS), and 36-Item Short Form Health Survey score (SF-36). Logistic regression identified risk factors, and Receiver Operating Characteristic Curves (ROC) determined the serum uric acid cut-off value for predicting outcomes, which was prospectively validated.</div></div><div><h3>Results</h3><div>Significant improvement were observed in postoperative range of motion score, VAS score, AOFAS score, and SF-36 score across all patients (P &lt; 0.05). However, the VAS score for the non-hyperuricemia group was lower; In contrast, the AOFAS and SF-36 scores were higher than the hyperuricemia group during the last visit (P &lt; 0.05). Multivariate analysis identified age, serum uric acid, osteochondral defect size, and urate deposition as independent risk factors for clinical outcomes, and the cut-off value for the serum uric acid American Orthopaedic Foot &amp; Ankle Society score 445 μmol/L with sensitivity and specificity of 87.25 % and 81.25 %, respectively. Additionally, the derivation set demonstrated a sensitivity of 85.71 % and specificity of 83.33 % in predicting poor outcomes.</div></div><div><h3>Conclusion</h3><div>Hyperuricemia predicts adverse clinical outcomes after arthroscopic microfracture of osteochondral lesions of the talus, strict postoperative drop uric acid treatment, especially hyperuricemia OLTs serum uric acid levels ≥ 445μmol/L.</div></div><div><h3>Level of evidence</h3><div>Level IV, case series.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"41 ","pages":"Pages 6-13"},"PeriodicalIF":1.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144470467","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":"Age-related changes in the quadriceps tendon: Collagen fibril diameter decreases with aging","authors":"Yoshihiro Ishida ,&nbsp;Yasushi Takata ,&nbsp;Tatsuya Ishikawa ,&nbsp;Mitsuhiro Kimura ,&nbsp;Naoki Takemoto ,&nbsp;Manase Nishimura ,&nbsp;Noriyuki Ozaki ,&nbsp;Satoru Demura ,&nbsp;Junsuke Nakase","doi":"10.1016/j.asmart.2025.06.002","DOIUrl":"10.1016/j.asmart.2025.06.002","url":null,"abstract":"<div><h3>Background</h3><div>The quadriceps tendon (QT) has recently gained attention as a graft tendon for anterior cruciate ligament (ACL) reconstruction due to its high strength from a larger ultrastructural collagen fibril diameter in children than that of the semitendinosus tendon. While QT collagen fibril diameter increases with growth, changes in older adults remain unclear. This study investigated age-related changes in QT collagen fibril diameter.</div></div><div><h3>Methods</h3><div>Twenty-four patients who had undergone ACL reconstruction using the QT or other knee surgeries were included. QT tissues collected during surgery were analyzed using transmission electron microscopy. Collagen fibril diameter was measured in four groups: Immature (11–13 years), Young (15–17 years), Adult (21–50 years), and Older (61–81 years). The average fibril diameter was calculated for each sample. At least four slides (one slide = one digital electron micrographs of the ultrathin section) were evaluated for each specimen, with at least 200 collagen fibrils on each slide. The average number of collagen fibrils measured per specimen was 812 ± 10. Data of the four groups were analyzed using one-way analysis of variance and Tukey's test.</div></div><div><h3>Results</h3><div>The mean collagen fibril diameters were 89.7 ± 14.4, 94.8 ± 16.4, 107.2 ± 12.1, and 73.0 ± 9.7 nm in the Immature, Young, Adult, and Older groups, respectively. Although no significant difference was observed between the Immature and Young groups, fibril diameter was significantly larger in the Adult group than in the Young group and significantly smaller in the Older group than in the other groups.</div></div><div><h3>Conclusions</h3><div>The average QT collagen fibril diameter increased with growth but was lower in the Older group, suggesting a decrease with aging.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"41 ","pages":"Pages 20-25"},"PeriodicalIF":1.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549529","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":"Clinical outcomes following anatomic double-bundle ACL reconstruction in skeletally mature adolescent patients: Comparison to single-bundle procedure","authors":"Kanto Nagai ,&nbsp;Takehiko Matsushita ,&nbsp;Shurong Zhang ,&nbsp;Yuichi Hoshino ,&nbsp;Yuta Nakanishi ,&nbsp;Daisuke Araki ,&nbsp;Kyohei Nishida ,&nbsp;Ryosuke Kuroda","doi":"10.1016/j.asmart.2025.04.006","DOIUrl":"10.1016/j.asmart.2025.04.006","url":null,"abstract":"<div><h3>Background</h3><div>The present study was aimed to compare the clinical outcomes following double-bundle (DB) ACL reconstruction (ACLR) with the outcomes following single-bundle (SB) ACLR in skeletally mature teenagers.</div></div><div><h3>Methods</h3><div>A total of 113 skeletally mature teenagers with unilateral ACL injury, who underwent primary ACLR using hamstring autograft with minimum 2 years follow-up, were included. This included 82 DB ACLR (median 16.0 [interquartile range (IQR), 2.0] year-old, male/female: 21/61) and 31 SB ACLR (17.0 [2.0] year-old, male/female: 6/25). At the final follow-up (3.6 [1.9] years), IKDC Subjective Knee Form (IKDC-SKF), Tegner activity scale, the side-to-side difference (SSD) in anterior tibial translation using KT arthrometer were obtained. The rate of residual pivot-shift test, graft rupture rate and contralateral ACL injury rate were also assessed.</div></div><div><h3>Results</h3><div>The rate of residual pivot-shift test was significantly lower in DB group than SB group (12.0 % vs 33.3 %, P = 0.02). Postoperative Tegner activity scale was significantly greater in DB group (7 [2]) than SB group (4 [4], P = 0.002). No significant differences were observed between two groups in IKDC-SKF (96.6 [10.0] in DB group, 97.7 [9.0] in SB group) and SSD in anterior tibial translation (1.5 [2.0] mm in DB group, 2.0 [2.0] mm in SB group). Graft rupture occurred in seven patients in DB group (8.5 %), and one patient in SB group (3.3 %). Contralateral ACL injury occurred in four patients in DB group (4.9 %), and two patients in SB group (6.5 %). No significant differences were observed between two groups in graft rupture and the contralateral ACL injury rates.</div></div><div><h3>Conclusion</h3><div>Clinical outcomes following DB ACLR were similar to SB ACLR, but the pivot-shift phenomenon appeared to be better controlled in DB ACLR than SB ACLR. Thus, to better restore rotatory knee stability, DB ACLR may be recommended in the skeletally mature teenagers.</div></div><div><h3>Level of evidence</h3><div>III.</div></div>","PeriodicalId":44283,"journal":{"name":"Asia-Pacific Journal of Sport Medicine Arthroscopy Rehabilitation and Technology","volume":"41 ","pages":"Pages 1-5"},"PeriodicalIF":1.5,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144205690","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":"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":"2025-04-01","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":"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":"2025-04-01","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":"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":"2025-04-01","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}