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Radiographic analysis of cartilage surface restoration in patients with pediatric capitellar osteochondritis dissecans lesions following osteochondral autologous transplantation 自体骨软骨移植后小儿剥脱性小头骨软骨炎患者软骨表面修复的影像学分析
Q2 Medicine Pub Date : 2025-10-30 DOI: 10.1016/j.jseint.2025.10.008
Jacqueline K. Kobayashi MD , Alexandria J. Sherwood MD , Benjamin Gundlach MD , Conor S. Locke MS , Tsz Kit Kevin Chan MD , Eileen A. Crawford MD , Kagan Ozer MD , Adam C. Abraham PhD , Jeffrey N. Lawton MD

Background

Osteochondral autologous transplant (OAT) is an option in the treatment of pediatric capitellar osteochondritis dissecans (OCD). However, quantifying the improvement in the area of OCD defects contributing to the articular surface after an OAT procedure has not been well documented. The purpose of this study was to use magnetic resonance imaging (MRI) to evaluate changes in the defect area of capitellar OCD lesions in pediatric patients following an OAT procedure using a lateral femoral condyle autograft.

Methods

Pediatric patients with capitellar OCD lesions underwent an OAT from the lateral femoral condyle to the involved capitellum. MRI was obtained preoperatively, 3 months postoperatively, and 12 months postoperatively. Sagittal image slices of the capitellum were analyzed to measure the percentage area of articular cartilage defect compared with a best-fit circle simulating the ideal profile of the capitellum.

Results

Twelve patients met the inclusion criteria for this study. Preoperatively, the average percentage area of defect within each capitellar OCD lesion (compared to the ideal profile) was 16%. At 3 months postoperatively, the average area defect significantly improved to 3% (P < .01) compared to preoperative imaging. One patient (8.3%) had complete filling of their cartilage defect, and 10 patients (83%) had ≤3% area of defect. One patient (8.3%) had subsidence of articular cartilage between their postoperative imaging at 3 months and 12 months. Despite this, there was no significant change in defect area between 3 months and 12 months postoperatively (P = .07).

Conclusion

This radiographic analysis of area restoration following an OAT procedure for pediatric capitellar OCD lesions demonstrates a significant decrease in defect area on the articular surface in postoperative MRI. This study provides further support for the utilization of an OAT procedure for the management of pediatric capitellar OCD lesions.
背景:自体骨软骨移植(OAT)是治疗小儿小头骨软骨炎(OCD)的一种选择。然而,量化OAT手术后对关节面造成的强迫症缺陷面积的改善还没有很好的文献记录。本研究的目的是利用磁共振成像(MRI)来评估小儿患者在使用自体股骨外侧髁进行OAT手术后小头OCD病变缺损区域的变化。方法对患有OCD小头病变的儿科患者进行从股骨外侧髁到受病灶小头的OAT手术。术前、术后3个月、术后12个月分别进行MRI检查。分析小头矢状面图像切片,测量关节软骨缺损面积百分比,并与模拟小头理想轮廓的最佳拟合圆进行比较。结果12例患者符合本研究的纳入标准。术前,每个OCD小头病变的平均缺损面积百分比(与理想剖面相比)为16%。术后3个月,与术前相比,平均面积缺损明显改善至3% (P < 0.01)。1例(8.3%)患者软骨缺损完全填充,10例(83%)患者缺损面积≤3%。1例患者(8.3%)在术后3个月和12个月的成像期间出现关节软骨下沉。尽管如此,术后3个月和12个月缺损面积没有明显变化(P = .07)。结论:小儿小头OCD OAT手术后区域恢复的影像学分析显示,术后MRI显示关节面缺损面积显著减少。本研究为OAT手术治疗小儿小头OCD病变提供了进一步的支持。
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引用次数: 0
Is elastography feasible in torn rotator cuffs before surgery? 手术前对撕裂的肩袖进行弹性成像是否可行?
Q2 Medicine Pub Date : 2025-10-30 DOI: 10.1016/j.jseint.2025.10.004
Mina Shenouda BS , Nick Bouletos MD , James Bilbrough MD , Victor Chen , Ala Hawa MD , Christyon Hayek MD , George A.C. Murrell MD, DPhil

Background

Shear wave elastography (SWE) is a relatively recent ultrasound imaging technique that uses focused acoustic radiation forces to quantify the elasticity of biological tissues, commonly referred to as ‘elastographic stiffness’. Preliminary data suggest that the elastographic stiffness of a torn supraspinatus tendon may serve as an independent predictor of retear risk following surgical repair. However, the feasibility of obtaining accurate preoperative SWE measurements remains uncertain, as tendon retraction beneath the acromion can limit visualization and reliable assessment.

Methods

This was a prospective cohort study that recruited 60 consecutive patients who had received a diagnosis of supraspinatus tear. SWE imaging was conducted to determine the elastographic stiffness of each patient's torn supraspinatus tendon.

Results

SWE values of the edge of the torn supraspinatus were successfully measured in 59/60 (98%) of cases, resulting in a failure to measure rate of 2%. SWE measurements were not feasible in a single case where the anteroposterior or mediolateral tear lengths were greater than 28 mm. Tendon elastographic stiffness, measured as elasticity (kPa), was inversely correlated with anteroposterior tear length (R2 −.51, P < .001), mediolateral tear length (R2 −.54, P < .001), and patient age (R2 −.27, P < .05).

Conclusion

This study shows that preoperative SWE of the torn supraspinatus tendon is a feasible imaging methodology if the supraspinatus tear is < 30 mm. Patients who had smaller tears and who were younger had greater SWE than older patients with larger tears.
背景剪切波弹性成像(SWE)是一种相对较新的超声成像技术,它使用聚焦声辐射力来量化生物组织的弹性,通常被称为“弹性刚度”。初步数据表明,冈上肌腱撕裂的弹性刚度可以作为手术修复后再撕裂风险的独立预测因子。然而,获得准确的术前SWE测量的可行性仍然不确定,因为肩峰下方的肌腱缩回限制了可视化和可靠的评估。方法:这是一项前瞻性队列研究,招募了60名连续确诊为冈上肌撕裂的患者。进行SWE成像以确定每位患者撕裂的冈上肌腱的弹性刚度。结果59/60(98%)的病例成功测量冈上肌撕裂边缘的sswe值,测量不良率为2%。对于前后或中外侧撕裂长度大于28 mm的单一病例,SWE测量是不可行的。肌腱弹性刚度(kPa)与前后撕裂长度呈负相关(R2−。51, P < .001),中外侧撕裂长度(R2−。54, P < .001),患者年龄(R2−。27, P < 0.05)。结论本研究表明,如果冈上肌腱撕裂为30 mm,术前SWE是一种可行的成像方法。泪点较小的年轻患者的SWE高于泪点较大的老年患者。
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引用次数: 0
Anatomic total shoulder arthroplasty for osteoarthritis in patients who are 75 years or older. An analysis of revision rates and patient-reported outcome using data from the Danish shoulder arthroplasty registry 解剖全肩关节置换术治疗75岁及以上骨关节炎患者。利用丹麦肩关节置换术登记处的数据对翻修率和患者报告的结果进行分析
Q2 Medicine Pub Date : 2025-10-30 DOI: 10.1016/j.jseint.2025.10.003
Carl Johan Queitsch BSc , Marc R.K. Nyring MD, PhD , Andreas Falkenberg Nielsen MD , Marie Louise Jensen MD , Bo S. Olsen MD, PhD , Jeppe V. Rasmussen MD, PhD

Background

Anatomic total shoulder arthroplasty (aTSA) has been proven effective in the treatment of painful end-stage osteoarthritis in patients with intact rotator cuff function. However, elderly patients may have an increased risk of revision, especially when it comes to the risk of revision due to loosening, rotator cuff pathology and periprosthetic fracture. The aim of this study was to investigate revision rates and patient-reported outcomes after aTSA for osteoarthritis in patients who are 75 years or older. We hypothesized that revision rates and patient-reported outcomes were similar for patients aged 55-74 years and 75 years or older.

Methods

This is a registry-based cohort study with data from the Danish Shoulder Arthroplasty Registry. For analysis, 1,884 aTSAs used for osteoarthritis between January 1, 2012, and December 31, 2019, were included. Patients were divided into 2 age groups: 55-74 years and 75 years or older. The Kaplan–Meier method was used to estimate unadjusted cumulative revision rates and a multivariate Cox regression model was used to determine hazard ratios. A multivariable linear regression model was used to compare the Western Ontario Osteoarthritis of the Shoulder Index (WOOS) 1 year postoperatively.

Results

There were 34 (2.5%) patients in the middle-aged group and 8 (1.6%) patients in the older age group who had revision surgery. The hazard ratio for revision was 0.67 for the older age group compared to the middle-aged group (95% confidence interval [CI] 0.31-1.47, P = .32). The unadjusted 2-year and 5-year cumulative revision rates were 2.3% (95% CI 1.4-3.2) and 3.6% (95% CI 2.3-4.9) in the middle-aged group and 1.7% (95% CI 0.4-3.0) and 2.2% (95% CI 0.6-3.8) in the older age group. The mean WOOS score was 84 (standard deviation = 20) in the middle-aged group and 85 (standard deviation = 20) in the older age group. The difference in WOOS between the 2 groups was 1.2 points (95% CI −1.5 to 3.8, P = .40).

Conclusion

We found low short-term revision rates and good patient-reported outcomes for both middle-aged and older patients treated for osteoarthritis using aTSA. The small differences in WOOS between the 2 age groups were not clinically relevant nor statistically significant. aTSA provides good and reliable outcomes in elderly patients with end-stage osteoarthritis, and age alone should not be a reason for opting out aTSA.
背景:原子全肩关节置换术(aTSA)已被证明对肩袖功能完好的患者治疗疼痛性终末期骨关节炎有效。然而,老年患者可能会增加翻修的风险,特别是当由于松动、肩袖病理和假体周围骨折而导致翻修的风险时。本研究的目的是调查75岁及以上骨关节炎患者aTSA后的翻修率和患者报告的结果。我们假设55-74岁和75岁及以上患者的复习率和患者报告的结果相似。方法:这是一项基于登记的队列研究,数据来自丹麦肩关节置换术登记中心。为了进行分析,纳入了2012年1月1日至2019年12月31日期间用于骨关节炎的1,884例atsa。患者分为55 ~ 74岁和75岁及以上两组。Kaplan-Meier法用于估计未调整的累积修正率,多变量Cox回归模型用于确定风险比。采用多变量线性回归模型比较西部安大略骨关节炎术后1年的肩关节指数(WOOS)。结果中老年行翻修手术34例(2.5%),老年行翻修手术8例(1.6%)。与中年组相比,老年组修订后的风险比为0.67(95%可信区间[CI] 0.31-1.47, P = 0.32)。未调整的2年和5年累积修正率在中年组分别为2.3% (95% CI 1.4-3.2)和3.6% (95% CI 2.3-4.9),在老年组分别为1.7% (95% CI 0.4-3.0)和2.2% (95% CI 0.6-3.8)。中年组平均WOOS评分为84(标准差= 20),老年组平均WOOS评分为85(标准差= 20)。两组间wos差异为1.2点(95% CI - 1.5 ~ 3.8, P = 0.40)。结论:我们发现使用aTSA治疗骨关节炎的中老年患者短期翻修率低,患者报告的预后良好。两个年龄组间wos的微小差异无临床相关性,也无统计学意义。aTSA为老年终末期骨关节炎患者提供了良好和可靠的结果,年龄不应成为选择退出aTSA的原因。
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引用次数: 0
Exploring age-related differences in asymptomatic male shoulder kinematics using four-dimensional computed tomography 利用四维计算机断层扫描探讨无症状男性肩部运动学的年龄相关性差异
Q2 Medicine Pub Date : 2025-10-30 DOI: 10.1016/j.jseint.2025.10.007
James C. Hunter PhD , Ting-Yim Lee PhD, FCCPM , George S. Athwal MD , Emily A. Lalone PhD

Background

Understanding age-related differences in shoulder glenohumeral and scapulothoracic motion has implications for the understanding, treatment, and management of shoulder injuries and diseases. Previous studies have investigated age-related differences, although statically and in single-plane motion. The shoulder, however, is a complex joint capable of a wide range of motion (ROM) and involves coordinated and synchronous movements from both the glenohumeral and scapulothoracic joints. Therefore, the objectives of this study were to measure age-related differences in kinematics of the glenohumeral and scapulothoracic joints during motion, as well as differences in the neutral positioning of the scapula and humerus.

Methods

Thirty-one male participants comprised 2 cohorts based on age (<45 and ≥ 45 years). Participants performed 2 motions, forward elevation (FE) and internal rotation (IR) to the back, with 4-dimensional computed tomography scanning to dynamically track the bones. The kinematics of the humerus and scapula were calculated with 6 degrees of freedom. The neutral position of the scapula and humerus was also calculated based on a static computed tomography scan.

Results

During the FE motion, IR of the humerus was significantly greater (13°, P = .033) in the older cohort while the scapula had significantly more anterior translation (9 mm, P = .022) and medial rotation (9°, P = .021) in the younger cohort. Anterior translation of the humeral head during IR was significantly greater (1 mm, P = .05) in the younger cohort, while scapular superior translation was significantly greater (8 mm, P = .006) in the older cohort. When measuring humeral translation as a percentage of glenoid width rather than absolute translation, the older cohort exhibited significantly less translational ROM during FE (6%, P < .001), (5%, P = .036), (5%, P = .009) and IR (6%, P < .001), (6%, P < .001), (4%, P < .001) in the respective anterior, superior, and lateral directions. Furthermore, compared to the younger cohort, the older cohort had a neutral pose with significantly more superior translation (17 mm, P = .05), lateral rotation (8°, P = .009) and posterior tilting (10°, P < .001) of the scapula, and a more anteriorly positioned humerus (2 mm, P = .007).

Conclusion

Overall, this study found age-related differences in kinematics and neutral positioning of the scapula and humerus, which may help improve understanding of age-related differences in subluxation, diseases, injuries, and ROM.
背景:了解肩部肩关节和肩胛骨运动的年龄相关差异对理解、治疗和管理肩部损伤和疾病具有重要意义。先前的研究已经调查了与年龄相关的差异,尽管是静态的和单平面运动的。然而,肩膀是一个复杂的关节,能够进行大范围的运动(ROM),包括肩关节和肩胛骨关节的协调和同步运动。因此,本研究的目的是测量运动过程中肩胛骨和肩胛骨关节运动学的年龄相关差异,以及肩胛骨和肱骨中性定位的差异。方法31例男性受试者按年龄(≤45岁和≥45岁)分为2组。参与者进行了两种运动,向前抬高(FE)和向后内旋转(IR),并使用四维计算机断层扫描来动态跟踪骨骼。以6个自由度计算肱骨和肩胛骨的运动学。肩胛骨和肱骨的中立位置也是基于静态计算机断层扫描计算的。结果在FE运动过程中,老年组肱骨IR明显增加(13°,P = 0.033),而年轻组肩胛骨前移(9 mm, P = 0.022)和内侧旋转(9°,P = 0.021)明显增加。在IR期间,年轻队列的肱骨头前移位显著增加(1 mm, P = 0.05),而老年队列的肩胛骨上移位显著增加(8 mm, P = 0.006)。当以肩关节宽度的百分比而不是绝对平移来测量肱骨平移时,老年队列在FE (6%, P < 001)、(5%,P = 0.036)、(5%,P = 0.009)和IR (6%, P < 001)、(6%,P < 001)、(4%,P < 001)期间在各自的前、上、外侧方向上表现出明显更少的平移ROM。此外,与年轻队列相比,老年队列具有中性姿势,肩胛骨的平移(17 mm, P = 0.05),侧旋(8°,P = 0.009)和后倾(10°,P = 0.001)明显更好,肱骨位置更前(2 mm, P = 0.007)。总的来说,本研究发现了肩胛骨和肱骨的运动学和中性定位的年龄相关差异,这可能有助于提高对半脱位、疾病、损伤和ROM的年龄相关差异的理解。
{"title":"Exploring age-related differences in asymptomatic male shoulder kinematics using four-dimensional computed tomography","authors":"James C. Hunter PhD ,&nbsp;Ting-Yim Lee PhD, FCCPM ,&nbsp;George S. Athwal MD ,&nbsp;Emily A. Lalone PhD","doi":"10.1016/j.jseint.2025.10.007","DOIUrl":"10.1016/j.jseint.2025.10.007","url":null,"abstract":"<div><h3>Background</h3><div>Understanding age-related differences in shoulder glenohumeral and scapulothoracic motion has implications for the understanding, treatment, and management of shoulder injuries and diseases. Previous studies have investigated age-related differences, although statically and in single-plane motion. The shoulder, however, is a complex joint capable of a wide range of motion (ROM) and involves coordinated and synchronous movements from both the glenohumeral and scapulothoracic joints. Therefore, the objectives of this study were to measure age-related differences in kinematics of the glenohumeral and scapulothoracic joints during motion, as well as differences in the neutral positioning of the scapula and humerus.</div></div><div><h3>Methods</h3><div>Thirty-one male participants comprised 2 cohorts based on age (&lt;45 and ≥ 45 years). Participants performed 2 motions, forward elevation (FE) and internal rotation (IR) to the back, with 4-dimensional computed tomography scanning to dynamically track the bones. The kinematics of the humerus and scapula were calculated with 6 degrees of freedom. The neutral position of the scapula and humerus was also calculated based on a static computed tomography scan.</div></div><div><h3>Results</h3><div>During the FE motion, IR of the humerus was significantly greater (13°, <em>P</em> = .033) in the older cohort while the scapula had significantly more anterior translation (9 mm, <em>P</em> = .022) and medial rotation (9°, <em>P</em> = .021) in the younger cohort. Anterior translation of the humeral head during IR was significantly greater (1 mm, <em>P</em> = .05) in the younger cohort, while scapular superior translation was significantly greater (8 mm, <em>P</em> = .006) in the older cohort. When measuring humeral translation as a percentage of glenoid width rather than absolute translation, the older cohort exhibited significantly less translational ROM during FE (6%, <em>P</em> &lt; .001), (5%, <em>P</em> = .036), (5%, <em>P</em> = .009) and IR (6%, <em>P</em> &lt; .001), (6%, <em>P</em> &lt; .001), (4%, <em>P</em> &lt; .001) in the respective anterior, superior, and lateral directions. Furthermore, compared to the younger cohort, the older cohort had a neutral pose with significantly more superior translation (17 mm, <em>P</em> = .05), lateral rotation (8°, <em>P</em> = .009) and posterior tilting (10°, <em>P</em> &lt; .001) of the scapula, and a more anteriorly positioned humerus (2 mm, <em>P</em> = .007).</div></div><div><h3>Conclusion</h3><div>Overall, this study found age-related differences in kinematics and neutral positioning of the scapula and humerus, which may help improve understanding of age-related differences in subluxation, diseases, injuries, and ROM.</div></div>","PeriodicalId":34444,"journal":{"name":"JSES International","volume":"10 1","pages":"Article 101405"},"PeriodicalIF":0.0,"publicationDate":"2025-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839784","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}
引用次数: 0
Preoperative testosterone replacement therapy: a potential risk-factor for complications and reoperation after rotator cuff repair 术前睾酮替代治疗:肩袖修复术后并发症和再手术的潜在危险因素
Q2 Medicine Pub Date : 2025-10-30 DOI: 10.1016/j.jseint.2025.10.002
Andrea H. Johnson MSN, CRNP, Ryan Friedman BS, Jane C. Brennan MS, Matthew A. Peterman DO, Jeffrey Gelfand MD, Daniel E. Redziniak MD, Cyrus Lashgari MD, Justin J. Turcotte PhD, MBA

Background

Prior studies have shown that testosterone replacement therapy (TRT) may be a risk-factor for complications after rotator cuff repair (RCR). This study evaluated complication rates among male RCR patients with and without a history of TRT preoperatively.

Methods

A retrospective review of 33,032 male patients undergoing RCR in the PearlDiver database was performed. Patients receiving TRT within 1-year of surgery were propensity score matched 1:3 to those not receiving TRT, 8,258 TRT, and 24,774 no-TRT patients were included. Univariate and multivariate analyses were performed to compare outcomes between groups.

Results

After controlling for decreased libido, benign prostatic hypertrophy, tobacco use, alcohol disorders, liver disease, rheumatologic disease, and preoperative steroid injections, TRT patients were more likely to be readmitted within 90 days (odds ratio [OR]: 1.26, P = .013). Within 2 years postoperatively, TRT patients were more likely to undergo (OR: 1.70, P < .001) or revision RCR (OR: 1.53, P < .001) and to have prolonged opioid use (OR: 1.32, P < .001), frozen shoulder (OR: 1.37, P < .001), and stroke/myocardial infarction (OR: 1.20, P < .001). Patients whose last TRT fill was within 6 months prior to surgery had higher rates of 90-day readmission (2.1% vs. 1.3%; P = .048), prolonged opioid use at 2 years (66.6% vs. 62.1%; P = .002), revision RCR at 2 years (13.1% vs. 8.7%; P < .001), and increased 2-year cost ($18,740 vs. $16,006; P < .001) compared to those whose last fill was 6-12 months preoperatively.

Conclusion

TRT within 1 year of RCR appears to be a risk factor for multiple postoperative complications and subsequent shoulder surgery. Cessation of TRT prior to RCR should be considered on a patient-specific basis.
先前的研究表明,睾酮替代疗法(TRT)可能是肩袖修复(RCR)后并发症的危险因素。本研究评估术前有或无TRT史的男性RCR患者的并发症发生率。方法对PearlDiver数据库中33032例男性RCR患者进行回顾性分析。手术1年内接受TRT的患者与未接受TRT的患者倾向评分匹配1:3,包括8,258例TRT患者和24,774例未接受TRT的患者。进行单因素和多因素分析比较两组间的结果。结果在控制性欲下降、良性前列腺肥大、吸烟、酒精障碍、肝脏疾病、风湿病和术前类固醇注射后,TRT患者在90天内再入院的可能性更大(优势比[OR]: 1.26, P = 0.013)。在术后2年内,TRT患者更有可能发生(OR: 1.70, P < 0.001)或修正RCR (OR: 1.53, P < 0.001),并长期使用阿片类药物(OR: 1.32, P < 0.001),肩周炎(OR: 1.37, P < 0.001)和中风/心肌梗死(OR: 1.20, P < 0.001)。最后一次TRT填充在术前6个月内的患者与术前6-12个月的患者相比,90天再入院率(2.1%对1.3%,P = 0.048), 2年阿片类药物使用时间延长(66.6%对62.1%,P = 0.002), 2年修订RCR(13.1%对8.7%,P < 0.001), 2年费用增加(18,740美元对16,006美元,P < 001)。结论RCR术后1年内trt是多发术后并发症及后续肩部手术的危险因素。在RCR之前停止TRT应根据患者的具体情况进行考虑。
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引用次数: 0
Histological features of the distal insertion of the middle glenohumeral ligament on the subscapularis tendon 肩胛下肌肌腱上盂肱中韧带远端止点的组织学特征
Q2 Medicine Pub Date : 2025-10-25 DOI: 10.1016/j.jseint.2025.09.016
Laurent Nové-Josserand MD , Juliet Tantot MD , Amandine Jost MD , Charles-Henri Bretagne MD , Arnaud Walch MD , David Guillier MD, PhD , Pierre Martz MD, PhD , Thomas Chauvet MD

Background

The middle glenohumeral ligament (MGHL) is the least well characterized glenohumeral ligament and its distal insertion remains matter of debate. The aim of this study was to describe the histological features of the distal insertion of the MGHL and its interactions with the subscapularis tendon. Our hypothesis was that the MGHL inserts distally on the articular surface of the subscapularis tendon.

Methods

Macroscopic and histological analysis of the insertion of the MGHL was performed in 16 shoulders obtained from 10 fresh cadaver dissections from a posterior approach. Macroscopic analysis involved observation of the distal insertion of the MGHL and measurement of its distance from the humerus. The distal insertion site was then extracted without bone, fixed in paraffin and stained with hematoxylin-eosin-saffron for histological analysis of longitudinal sections of the MGHL.

Results

The MGHL inserted macroscopically into the subscapularis tendon in all 16 shoulders, at a mean distance of 13 mm (range, 5-30 mm) from the humerus. Histological analysis revealed that the MGHL inserted on the deep layer (articular surface) of the subscapularis in all 16 shoulders, at a distance from the humerus. The junction angle was acute in all cases. Two different connection mechanisms were observed. While a majority of MGHL collagen fibers extended into the articular capsule, increasing its thickness, the remaining MGHL collagen fibers penetrated into the subscapularis tendon in the longitudinal direction of the ligament, mingling with the larger perpendicular collagen bundles of the subscapularis tendon. The junction was in some cases in the subscapularis tendon and in others in the subscapularis myotendinous junction.

Conclusion

The anatomically exceptional ligament-to-tendon distal insertion of the MGHL into the subscapularis was histologically confirmed in all. These findings support recent results indicating that the MGHL does not insert onto the humerus but into the articular surface of the subscapularis tendon, forming a blend of ligament fibers up to its terminal insertion on the lesser tuberosity. These results suggest that MGHL mechanical constraints are transferred into the subscapularis tendon rather than at the bony insertion on the lesser tuberosity.
背景:中盂肱韧带(MGHL)是特征最不明确的盂肱韧带,其远端插入仍有争议。本研究的目的是描述MGHL远端止点的组织学特征及其与肩胛下肌腱的相互作用。我们的假设是MGHL远端插入肩胛下肌腱的关节面。方法对10例新鲜尸体后路解剖的16例肩部进行MGHL插入的显微和组织学分析。宏观分析包括观察MGHL远端止点并测量其与肱骨的距离。拔出远端插入部位,不带骨,石蜡固定,苏木精-伊红-藏红花染色,对MGHL纵切片进行组织学分析。结果MGHL从宏观上插入肩胛下肌腱,距肱骨平均距离为13 mm(范围5 ~ 30 mm)。组织学分析显示,MGHL位于所有16个肩胛下肌的深层(关节面),距肱骨一定距离。在所有情况下,交点角都是锐角。观察到两种不同的连接机制。大部分MGHL胶原纤维进入关节囊,增加关节囊的厚度,剩余的MGHL胶原纤维沿韧带的纵向进入肩胛下肌腱,与较大的垂直的肩胛下肌腱胶原束混合。一些病例的连接点在肩胛下肌腱另一些病例在肩胛下肌腱连接点。结论所有病例均在组织学上证实了MGHL远端韧带-肌腱插入肩胛下肌的解剖异常。这些发现支持了最近的研究结果,即MGHL不插入肱骨,而是插入肩胛下肌腱的关节表面,形成韧带纤维的混合物,直至其末端插入小结节。这些结果表明MGHL机械约束转移到肩胛下肌腱,而不是在小结节的骨止点。
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引用次数: 0
Modeling surgeon belief updating under bias: a Bayesian simulation in shoulder arthroplasty 建模外科医生偏见下的信念更新:肩关节置换术中的贝叶斯模拟
Q2 Medicine Pub Date : 2025-10-24 DOI: 10.1016/j.jseint.2025.09.018
Mariano E. Menendez MD , Michael A. Moverman MD , Surena Namdari MD, MSc , Frederick A. Matsen III MD , David Ring MD, PhD

Background

Shoulder surgeons often offer markedly different treatment recommendations for a given patient and pathophysiology within the context of a common body of evidence. Prior beliefs and cognitive bias may contribute to this variability. Using Bayesian decision theory informed by principles of behavioral science, we modeled how surgeons with different initial beliefs and degrees of bias update their treatment preferences in response to new evidence comparing anatomic total shoulder arthroplasty (aTSA) and reverse total shoulder arthroplasty (rTSA) when making surgery recommendations for advanced primary glenohumeral osteoarthritis.

Methods

We developed a Bayesian simulation involving 3 hypothetical surgeons with distinct initial beliefs: aTSA Loyalist (90% belief aTSA is superior), Neutral Thinker (50%), and rTSA Advocate (10% belief aTSA is superior) and varying degrees of confirmation bias (eg, the selective discounting of evidence that contradicts one's current belief). Each surgeon was sequentially exposed to 10 simulated randomized trials modestly favoring rTSA, with belief trajectories updated after each trial under 2 conditions: (1) an unbiased scenario, in which all new evidence was weighted at face value, and (2) a biased scenario, in which disconfirming evidence was systematically downweighted.

Results

Under a condition simulating no confirmation bias, all surgeons gradually shifted toward lower belief in aTSA superiority as they reviewed the 10 rTSA-favoring trials: the aTSA Loyalist moved from about 90% to 25% confidence in aTSA, the Neutral Thinker from 50% to 2.0%, and the rTSA Advocate from 10% to 1.2%. Under biased conditions, belief change was markedly reduced for the aTSA Loyalist, who remained 64% confident in aTSA superiority despite consistent rTSA-favoring evidence. Changes for the rTSA Advocate (10%-1.2%) and Neutral Thinker (50%-2.3%) were largely unchanged.

Conclusion

This Bayesian simulation provides a practical framework to demonstrate how prior beliefs and cognitive bias can markedly influence the way shoulder surgeons interpret and act upon new evidence, contributing to unwarranted variation in care. When it comes to treatment recommendations, what surgeons believe at the outset may matter as much or more than the data itself. Implementing targeted strategies such as foundational principles based in behavioral ethics, evidence-based decision and debiasing aids, structured peer review, and routine performance feedback may help align treatment decisions more closely with a patient's values based on the best available evidence. The use of rTSA-favoring evidence in this simulation is solely for illustrative purposes and should not be interpreted as an endorsement of increased rTSA use in clinical practice.
背景:肩关节外科医生通常会在共同证据的背景下,针对特定患者和病理生理提供明显不同的治疗建议。先前的信念和认知偏见可能导致这种差异。运用基于行为科学原理的贝叶斯决策理论,我们模拟了不同初始信念和偏差程度的外科医生如何根据比较解剖性全肩关节置换术(aTSA)和反向全肩关节置换术(rTSA)的新证据更新他们的治疗偏好,以推荐晚期原发性盂肱骨关节炎的手术。方法我们建立了一个贝叶斯模拟,涉及3个假设的外科医生,他们有不同的初始信念:aTSA忠诚者(90%认为aTSA优越),中立思想家(50%)和rTSA倡导者(10%认为aTSA优越)和不同程度的确认偏差(例如,选择性地贬低与自己当前信念相矛盾的证据)。每位外科医生依次接触10个模拟随机试验,这些试验适度地支持rTSA,在2种情况下,每次试验后都会更新信念轨迹:(1)在无偏的情况下,所有新证据都按表面价值加权;(2)在有偏的情况下,不证实的证据被系统地加权。结果在模拟无确认偏倚的条件下,所有外科医生在回顾10个支持aTSA的试验时逐渐转向对aTSA优越性的较低信念:aTSA忠诚者对aTSA的信心从约90%降至25%,中立者从50%降至2.0%,rTSA倡导者从10%降至1.2%。在有偏见的条件下,aTSA忠诚者的信念变化明显减少,尽管有一致的rtsa支持证据,但他们仍然对aTSA优势有64%的信心。rTSA倡导者(10%-1.2%)和中立思考者(50%-2.3%)的变化基本不变。这个贝叶斯模拟提供了一个实用的框架来证明先前的信念和认知偏见如何显著影响肩关节外科医生对新证据的解释和行动方式,从而导致护理的无端变化。当涉及到治疗建议时,外科医生一开始的看法可能与数据本身一样重要,甚至更重要。实施有针对性的策略,如基于行为伦理的基本原则、基于证据的决策和消除偏见的辅助手段、有组织的同行评议和常规的表现反馈,可能有助于根据现有的最佳证据,使治疗决策更紧密地符合患者的价值观。在这个模拟中使用支持rTSA的证据仅仅是为了说明目的,不应该被解释为支持在临床实践中增加rTSA的使用。
{"title":"Modeling surgeon belief updating under bias: a Bayesian simulation in shoulder arthroplasty","authors":"Mariano E. Menendez MD ,&nbsp;Michael A. Moverman MD ,&nbsp;Surena Namdari MD, MSc ,&nbsp;Frederick A. Matsen III MD ,&nbsp;David Ring MD, PhD","doi":"10.1016/j.jseint.2025.09.018","DOIUrl":"10.1016/j.jseint.2025.09.018","url":null,"abstract":"<div><h3>Background</h3><div>Shoulder surgeons often offer markedly different treatment recommendations for a given patient and pathophysiology within the context of a common body of evidence. Prior beliefs and cognitive bias may contribute to this variability. Using Bayesian decision theory informed by principles of behavioral science, we modeled how surgeons with different initial beliefs and degrees of bias update their treatment preferences in response to new evidence comparing anatomic total shoulder arthroplasty (aTSA) and reverse total shoulder arthroplasty (rTSA) when making surgery recommendations for advanced primary glenohumeral osteoarthritis.</div></div><div><h3>Methods</h3><div>We developed a Bayesian simulation involving 3 hypothetical surgeons with distinct initial beliefs: aTSA Loyalist (90% belief aTSA is superior), Neutral Thinker (50%), and rTSA Advocate (10% belief aTSA is superior) and varying degrees of confirmation bias (eg, the selective discounting of evidence that contradicts one's current belief). Each surgeon was sequentially exposed to 10 simulated randomized trials modestly favoring rTSA, with belief trajectories updated after each trial under 2 conditions: (1) an unbiased scenario, in which all new evidence was weighted at face value, and (2) a biased scenario, in which disconfirming evidence was systematically downweighted.</div></div><div><h3>Results</h3><div>Under a condition simulating no confirmation bias, all surgeons gradually shifted toward lower belief in aTSA superiority as they reviewed the 10 rTSA-favoring trials: the aTSA Loyalist moved from about 90% to 25% confidence in aTSA, the Neutral Thinker from 50% to 2.0%, and the rTSA Advocate from 10% to 1.2%. Under biased conditions, belief change was markedly reduced for the aTSA Loyalist, who remained 64% confident in aTSA superiority despite consistent rTSA-favoring evidence. Changes for the rTSA Advocate (10%-1.2%) and Neutral Thinker (50%-2.3%) were largely unchanged.</div></div><div><h3>Conclusion</h3><div>This Bayesian simulation provides a practical framework to demonstrate how prior beliefs and cognitive bias can markedly influence the way shoulder surgeons interpret and act upon new evidence, contributing to unwarranted variation in care. When it comes to treatment recommendations, what surgeons believe at the outset may matter as much or more than the data itself. Implementing targeted strategies such as foundational principles based in behavioral ethics, evidence-based decision and debiasing aids, structured peer review, and routine performance feedback may help align treatment decisions more closely with a patient's values based on the best available evidence. The use of rTSA-favoring evidence in this simulation is solely for illustrative purposes and should not be interpreted as an endorsement of increased rTSA use in clinical practice.</div></div>","PeriodicalId":34444,"journal":{"name":"JSES International","volume":"10 1","pages":"Article 101399"},"PeriodicalIF":0.0,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145736234","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}
引用次数: 0
Risk factors for postage stamp fracture following arthroscopic Bankart repair: a systematic review 关节镜下Bankart修复后邮票骨折的危险因素:系统回顾
Q2 Medicine Pub Date : 2025-10-24 DOI: 10.1016/j.jseint.2025.09.017
Jakob Oury MD , Srikanth Mudiganty MD , Alexander Crowley MD , Brian Godshaw MD

Background

Postage stamp fractures are a rare but considerable complication after arthroscopic Bankart repair. Previous literature has implicated various patient- and technique-specific factors, but analyses often lacked comparison to the broader operative sample. The purpose of this study is to systematically review the literature on postage stamp fracture after arthroscopic Bankart repair, evaluate patient- and anchor-specific risk factors, and contextualize findings within the full operative sample.

Methods

A systematic review was conducted to identify studies reporting postage stamp fractures following arthroscopic Bankart repair using Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Patient demographics, anchor characteristics, and surgical outcomes were extracted. Risk factor associations were evaluated descriptively, with emphasis on whether reported associations held true across the full sample of surgical cases in each study.

Results

A systematic search yielded 2,349 articles; after duplicate removal and screening, 7 studies met inclusion criteria (2 comparative, 5 noncomparative). Studies included a total of 1,264 patients aged 10-61, with fracture incidence in larger cohorts ranging from 1.58% to 5%. Most patients with fractures participated in sports, particularly contact or high-risk activities. Although male patients made up the majority of fracture cases, this reflected the underlying demographic of operative patients. Patients with fractures were often the same age or older than the overall sample. Anchor number, diameter, type, and material were variably reported. Average anchor count was not consistently higher in patients with fractures, and no study found a significant association between anchor quantity and fracture risk. Absorbable anchors were implicated in a higher proportion of fracture cases. Osteolysis was common among patients with fractures. Insertion angle and suture type (knotted vs. knotless) were inconsistently reported and not clearly linked to fracture incidence.

Conclusion

Male sex and younger age, previously identified as risk factors, were not associated with postage stamp fractures when contextualized within the full operative sample. Presence of osteolysis and athletic participation was consistently associated with postage stamp fracture and may represent meaningful risk factors. Contrary to earlier reports, higher anchor quantity was not associated with increased postage stamp fracture risk; instead, lower anchor counts may be linked to instability, which itself may predispose to postage stamp fracture. Use of absorbable anchors emerged as a potential contributor to fracture risk that warrants further research.
背景:邮票骨折是关节镜Bankart修复后罕见但相当严重的并发症。先前的文献涉及各种患者和技术特定因素,但分析往往缺乏与更广泛的手术样本的比较。本研究的目的是系统地回顾关节镜下Bankart修复后邮票骨折的文献,评估患者和锚定特定的危险因素,并在完整的手术样本中分析结果。方法采用系统评价和荟萃分析指南的首选报告项目,对关节镜Bankart修复后报告邮票骨折的研究进行系统评价。提取患者人口统计学、锚点特征和手术结果。描述性地评估了危险因素的关联,重点是报告的关联是否在每项研究的全部手术病例样本中都成立。结果系统检索获得文献2349篇;剔除重复和筛选后,7项研究符合纳入标准(2项比较研究,5项非比较研究)。研究共纳入1264名年龄在10-61岁的患者,骨折发生率在较大队列中为1.58%至5%。骨折患者多参加运动,尤其是接触性或高危活动。尽管男性患者占骨折病例的大多数,但这反映了手术患者的潜在人口统计学特征。骨折患者的年龄通常与整体样本相同或更大。锚钉数量、直径、类型和材料的报告各不相同。骨折患者的平均锚钉数量并不总是较高,并且没有研究发现锚钉数量与骨折风险之间存在显著关联。可吸收锚钉在骨折病例中所占比例较高。骨溶解在骨折患者中很常见。插入角度和缝线类型(有节或无节)的报道不一致,与骨折发生率没有明确的联系。结论:男性和年轻年龄,以前被认为是危险因素,但在完整的手术样本中,与邮票骨折无关。骨溶解和参加运动一直与邮票骨折相关,可能是有意义的危险因素。与之前的报道相反,锚钉数量增加与邮票骨折风险增加无关;相反,较低的锚点计数可能与不稳定有关,而不稳定本身可能导致邮票骨折。可吸收锚的使用可能增加骨折风险,值得进一步研究。
{"title":"Risk factors for postage stamp fracture following arthroscopic Bankart repair: a systematic review","authors":"Jakob Oury MD ,&nbsp;Srikanth Mudiganty MD ,&nbsp;Alexander Crowley MD ,&nbsp;Brian Godshaw MD","doi":"10.1016/j.jseint.2025.09.017","DOIUrl":"10.1016/j.jseint.2025.09.017","url":null,"abstract":"<div><h3>Background</h3><div>Postage stamp fractures are a rare but considerable complication after arthroscopic Bankart repair. Previous literature has implicated various patient- and technique-specific factors, but analyses often lacked comparison to the broader operative sample. The purpose of this study is to systematically review the literature on postage stamp fracture after arthroscopic Bankart repair, evaluate patient- and anchor-specific risk factors, and contextualize findings within the full operative sample.</div></div><div><h3>Methods</h3><div>A systematic review was conducted to identify studies reporting postage stamp fractures following arthroscopic Bankart repair using Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Patient demographics, anchor characteristics, and surgical outcomes were extracted. Risk factor associations were evaluated descriptively, with emphasis on whether reported associations held true across the full sample of surgical cases in each study.</div></div><div><h3>Results</h3><div>A systematic search yielded 2,349 articles; after duplicate removal and screening, 7 studies met inclusion criteria (2 comparative, 5 noncomparative). Studies included a total of 1,264 patients aged 10-61, with fracture incidence in larger cohorts ranging from 1.58% to 5%. Most patients with fractures participated in sports, particularly contact or high-risk activities. Although male patients made up the majority of fracture cases, this reflected the underlying demographic of operative patients. Patients with fractures were often the same age or older than the overall sample. Anchor number, diameter, type, and material were variably reported. Average anchor count was not consistently higher in patients with fractures, and no study found a significant association between anchor quantity and fracture risk. Absorbable anchors were implicated in a higher proportion of fracture cases. Osteolysis was common among patients with fractures. Insertion angle and suture type (knotted vs. knotless) were inconsistently reported and not clearly linked to fracture incidence.</div></div><div><h3>Conclusion</h3><div>Male sex and younger age, previously identified as risk factors, were not associated with postage stamp fractures when contextualized within the full operative sample. Presence of osteolysis and athletic participation was consistently associated with postage stamp fracture and may represent meaningful risk factors. Contrary to earlier reports, higher anchor quantity was not associated with increased postage stamp fracture risk; instead, lower anchor counts may be linked to instability, which itself may predispose to postage stamp fracture. Use of absorbable anchors emerged as a potential contributor to fracture risk that warrants further research.</div></div>","PeriodicalId":34444,"journal":{"name":"JSES International","volume":"10 1","pages":"Article 101397"},"PeriodicalIF":0.0,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145736053","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}
引用次数: 0
Preoperative pain associated with rotator cuff tears correlates with synovitis severity in the rotator interval 术前与肩袖撕裂相关的疼痛与肩袖间期滑膜炎的严重程度相关
Q2 Medicine Pub Date : 2025-10-24 DOI: 10.1016/j.jseint.2025.09.013
Yuichi Nagase MD, PhD , Kazuki Abe MD , Kazuya Tamai MD, PhD , Masashi Naito MD, PhD , Hideaki Asai MD , Masahiko Morishige MD , Sakae Tanaka MD, PhD

Background

The present study primarily aimed to investigate whether preoperative pain associated with rotator cuff tears correlates with the severity of synovitis in the rotator interval (RI) on arthroscopic findings retrospectively.

Methods

Between July 2017 and December 2022, 131 shoulders with arthroscopic rotator cuff repair were retrospectively investigated. The pain domain of the preoperative Constant Score and Shoulder36 were used to assess preoperative pain. Two examiners confirmed the degree of synovitis of RI in the arthroscopic findings.

Results

The mean patient age was 68.9 years. Synovitis in the RI was found in 118 shoulders (94%) assessed by arthroscopy. The pain domain of the Constant Score significantly correlated with synovitis in the RI assessed by arthroscopic findings (P < .01), but the size and the number of rotator cuff tears did not.

Conclusion

The preoperative pain associated with rotator cuff tears significantly correlated with synovitis severity in the RI assessed by AS findings, highlighting the role of synovitis as a potential contributor to pain in patients with rotator cuff tears.
本研究的主要目的是回顾性研究关节镜检查中肩袖撕裂相关的术前疼痛是否与旋转间隙滑膜炎的严重程度相关。方法回顾性分析2017年7月至2022年12月期间131例肩关节镜下肩袖修复的病例。采用术前Constant Score和Shoulder36疼痛域评估术前疼痛。两名检查人员在关节镜检查中确认了RI滑膜炎的程度。结果患者平均年龄68.9岁。肩关节镜检查发现118例肩关节滑膜炎(94%)。关节镜检查结果显示,Constant Score的疼痛域与RI中的滑膜炎显著相关(P < .01),但与肩袖撕裂的大小和数量无关。结论术前肩袖撕裂相关疼痛与AS评估的RI中滑膜炎严重程度显著相关,突出了滑膜炎作为肩袖撕裂患者疼痛的潜在因素的作用。
{"title":"Preoperative pain associated with rotator cuff tears correlates with synovitis severity in the rotator interval","authors":"Yuichi Nagase MD, PhD ,&nbsp;Kazuki Abe MD ,&nbsp;Kazuya Tamai MD, PhD ,&nbsp;Masashi Naito MD, PhD ,&nbsp;Hideaki Asai MD ,&nbsp;Masahiko Morishige MD ,&nbsp;Sakae Tanaka MD, PhD","doi":"10.1016/j.jseint.2025.09.013","DOIUrl":"10.1016/j.jseint.2025.09.013","url":null,"abstract":"<div><h3>Background</h3><div>The present study primarily aimed to investigate whether preoperative pain associated with rotator cuff tears correlates with the severity of synovitis in the rotator interval (RI) on arthroscopic findings retrospectively.</div></div><div><h3>Methods</h3><div>Between July 2017 and December 2022, 131 shoulders with arthroscopic rotator cuff repair were retrospectively investigated. The pain domain of the preoperative Constant Score and Shoulder36 were used to assess preoperative pain. Two examiners confirmed the degree of synovitis of RI in the arthroscopic findings.</div></div><div><h3>Results</h3><div>The mean patient age was 68.9 years. Synovitis in the RI was found in 118 shoulders (94%) assessed by arthroscopy. The pain domain of the Constant Score significantly correlated with synovitis in the RI assessed by arthroscopic findings (<em>P</em> &lt; .01), but the size and the number of rotator cuff tears did not.</div></div><div><h3>Conclusion</h3><div>The preoperative pain associated with rotator cuff tears significantly correlated with synovitis severity in the RI assessed by AS findings, highlighting the role of synovitis as a potential contributor to pain in patients with rotator cuff tears.</div></div>","PeriodicalId":34444,"journal":{"name":"JSES International","volume":"10 1","pages":"Article 101393"},"PeriodicalIF":0.0,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145736051","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}
引用次数: 0
Humeral retrotorsion corrected glenohumeral external rotation deficits are present in medial ulnar collateral ligament injured and uninjured college baseball players 肱骨后扭转矫正肩关节外旋缺陷存在于内侧尺侧副韧带损伤和未受伤的大学棒球运动员
Q2 Medicine Pub Date : 2025-10-24 DOI: 10.1016/j.jseint.2025.10.001
Jacob E. Vasquez PT, DPT, OCS , Frankie-Ann McCauley PT, DPT, SCS, CSCS , Claire M. Reynolds PT, DPT, SCS , Sean M. Kennedy PT, DPT, PhD, SCS, CSCS , Jacob D. Jelmini PhD, ATC, CSCS , Zachary A. Gehring , J. Craig Garrison PT, PhD, SCS, ATC , John E. Conway MD , Natalie L. Myers PhD, ATC, PES

Background

Glenohumeral rotational motion should be interpreted within the context of relative humeral retrotorsion (rHRT). To date, no study has investigated shoulder rotational motion within the context of rHRT in a medial ulnar collateral ligament (MUCL)–injured population. Therefore, the purpose of this study was to determine if there were differences in HRT-corrected rotational motion between MUCL-injured and uninjured college baseball players.

Methods

Thirty-five baseball players diagnosed with an MUCL injury were matched with 35 uninjured controls. Glenohumeral external rotation (GER) and internal rotation (GIR), as well as anatomic HRT, were collected on both arms. Data reduction was performed for all objective rotational motions and anatomic HRT, which was used to quantify rHRT. rHRT was then used to calculate HRT-corrected GER and HRT-corrected GIR. Outcomes were compared between groups using multivariate analysis of covariance, controlling for baseline cohort differences.

Results

Results indicated no significant multivariate effects of cohort, body mass index, or level of competition on HRT-corrected GER or GIR (all Pillai's Trace P > .05, partial η2 ≤ 0.019). Adjusted estimated marginal means for HRT-corrected GER were –9.99° (standard error [SE] = 2.51) for the MUCL cohort and –5.45° (SE = 2.51) for the uninjured cohort; for HRT-corrected GIR, they were 5.01° (SE = 2.46) and 2.21° (SE = 2.46), respectively.

Conclusion

HRT-corrected GER deficits are more prevalent than HRT-corrected GIR deficits in both cohorts. These findings continue to highlight the importance of accounting for osseous adaptations in range of motion measurements, as GIR deficit is not as common as previously thought.
背景:肱骨盂旋转运动应在肱骨相对后旋(rHRT)的背景下进行解释。到目前为止,还没有研究调查了内侧尺副韧带(MUCL)损伤人群在rHRT背景下的肩部旋转运动。因此,本研究的目的是确定在mucl受伤和未受伤的大学棒球运动员之间,hrt纠正的旋转运动是否存在差异。方法将35名诊断为MUCL损伤的棒球运动员与35名未受伤的对照组进行配对。肩关节外旋(GER)和内旋(GIR)以及解剖HRT均在双臂上收集。对所有客观旋转运动和解剖HRT进行数据精简,用于量化rHRT。然后使用rHRT计算经hrt校正的GER和经hrt校正的GIR。采用多变量协方差分析比较各组之间的结果,控制基线队列差异。结果结果显示,队列、体重指数或竞争水平对hrt校正后的GER或GIR无显著的多因素影响(所有Pillai's Trace P > 05,部分方差2≤0.019)。经hrt校正后的GER校正后的估计边际均值在MUCL组为-9.99°(标准误差[SE] = 2.51),在未损伤组为-5.45°(SE = 2.51);hrt校正后的GIR分别为5.01°(SE = 2.46)和2.21°(SE = 2.46)。结论在两组人群中,hrt纠正的GER缺陷比hrt纠正的GIR缺陷更为普遍。这些发现继续强调了在运动范围测量中考虑骨骼适应的重要性,因为GIR缺陷并不像以前认为的那样普遍。
{"title":"Humeral retrotorsion corrected glenohumeral external rotation deficits are present in medial ulnar collateral ligament injured and uninjured college baseball players","authors":"Jacob E. Vasquez PT, DPT, OCS ,&nbsp;Frankie-Ann McCauley PT, DPT, SCS, CSCS ,&nbsp;Claire M. Reynolds PT, DPT, SCS ,&nbsp;Sean M. Kennedy PT, DPT, PhD, SCS, CSCS ,&nbsp;Jacob D. Jelmini PhD, ATC, CSCS ,&nbsp;Zachary A. Gehring ,&nbsp;J. Craig Garrison PT, PhD, SCS, ATC ,&nbsp;John E. Conway MD ,&nbsp;Natalie L. Myers PhD, ATC, PES","doi":"10.1016/j.jseint.2025.10.001","DOIUrl":"10.1016/j.jseint.2025.10.001","url":null,"abstract":"<div><h3>Background</h3><div>Glenohumeral rotational motion should be interpreted within the context of relative humeral retrotorsion (rHRT). To date, no study has investigated shoulder rotational motion within the context of rHRT in a medial ulnar collateral ligament (MUCL)–injured population. Therefore, the purpose of this study was to determine if there were differences in HRT-corrected rotational motion between MUCL-injured and uninjured college baseball players.</div></div><div><h3>Methods</h3><div>Thirty-five baseball players diagnosed with an MUCL injury were matched with 35 uninjured controls. Glenohumeral external rotation (GER) and internal rotation (GIR), as well as anatomic HRT, were collected on both arms. Data reduction was performed for all objective rotational motions and anatomic HRT, which was used to quantify rHRT. rHRT was then used to calculate HRT-corrected GER and HRT-corrected GIR. Outcomes were compared between groups using multivariate analysis of covariance, controlling for baseline cohort differences.</div></div><div><h3>Results</h3><div>Results indicated no significant multivariate effects of cohort, body mass index, or level of competition on HRT-corrected GER or GIR (all Pillai's Trace <em>P</em> &gt; .05, partial η<sup>2</sup> ≤ 0.019). Adjusted estimated marginal means for HRT-corrected GER were –9.99° (standard error [SE] = 2.51) for the MUCL cohort and –5.45° (SE = 2.51) for the uninjured cohort; for HRT-corrected GIR, they were 5.01° (SE = 2.46) and 2.21° (SE = 2.46), respectively.</div></div><div><h3>Conclusion</h3><div>HRT-corrected GER deficits are more prevalent than HRT-corrected GIR deficits in both cohorts. These findings continue to highlight the importance of accounting for osseous adaptations in range of motion measurements, as GIR deficit is not as common as previously thought.</div></div>","PeriodicalId":34444,"journal":{"name":"JSES International","volume":"10 1","pages":"Article 101398"},"PeriodicalIF":0.0,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145736236","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}
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