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首页> 外文期刊>Orthopaedic Journal of Sports Medicine >Stress-Distribution Pattern Across the Glenohumeral Joint in Collegiate and Professional Baseball Players: A Computed Tomography Osteoabsorptiometry Study
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Stress-Distribution Pattern Across the Glenohumeral Joint in Collegiate and Professional Baseball Players: A Computed Tomography Osteoabsorptiometry Study

机译：高校和职业棒球运动员胶质纲花关节的应力分布模式：计算机断层扫描骨缺陷症研究

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Background: The influence of long-term loading conditions on the articular surfaces of the glenohumeral joint can be determined by measuring stress-distribution patterns. Long-term pitching activity changes the stress distribution across the glenohumeral joint surface; however, the influence of competitive level on stress-distribution patterns remains unclear. Purpose: To use computed tomography (CT) osteoabsorptiometry (CTOAM) to evaluate the distribution of subchondral bone density across the glenohumeral joint in collegiate and professional baseball players as well as to determine the effects of pitching activity on the articular surfaces. Study Design: Descriptive laboratory study. Methods: We evaluated 73 shoulders in 50 baseball players. CT imaging data were obtained from the dominant-side shoulder of 12 professional pitchers (PP group) and 15 professional fielders (PF group). CT imaging data were also obtained from both shoulders of 12 asymptomatic collegiate pitchers (CP group) and 11 collegiate fielders (CF group). The pattern of distribution of subchondral bone density across the articular surfaces of each glenohumeral joint was assessed by CTOAM. As a measure of bone density, the mean Hounsfield units (HU) were obtained for each joint surface, and the absolute values of the dominant shoulder were compared for each group. Results: Stress-distribution patterns over the articular surfaces differed between the dominant and nondominant sides in the CP group as well as between both collegiate groups versus the PP group. In the CP group, the mean HU of the humeral head surface were greater on the nondominant versus dominant side ( P = .035). On the dominant side, the mean HU of the humeral head surface and glenoid were greater in the CP versus the PP group ( P = .001 and .027, respectively). Conclusion: Stress distribution on the articular surface of the glenohumeral joint was affected by pitching ability and competitive level. Our analysis indicates that the traction force on the glenohumeral joint surface might be greater than compression force during pitching. Clinical Relevance: The present findings suggest that pitching activity results in low stress to the articular surfaces of the glenohumeral joint. This supports the notion that mechanical conditions play a crucial role in the etiology of disorders specific to pitching activity.
机译：背景：通过测量应力分布图案，可以通过测量应力分布图案来确定长期装载条件对胶质骨关节关节表面的影响。长期俯仰活动会改变胶质环接头表面的应力分布;然而，竞争水平对应力分布模式的影响仍不清楚。目的：使用计算的断层扫描（CT）骨骨薄机器术（CTOAM）来评估大学生和专业棒球运动员在胶质骨关节的子骨密度分布，以及确定俯仰活动对关节表面的影响。研究设计：描述性实验室研究。方法：我们在50名棒球运动员中评估了73个肩膀。 CT成像数据是从12个专业投手（PP组）和15个专业领域（PF组）的主导侧肩部获得的。 CT成像数据也是从12个无症状大学生投手（CP组）和11种大学生领域（CF组）的肩部获得的。通过CTOAM评估跨越每个胶质环节关节关节表面的骨髓内骨密度的分布模式。作为骨密度的衡量标准，为每个关节表面获得平均Hounsfield单元（Hu），并将其对每个组进行比较的绝对值。结果：关节表面上的应力分布图案不同于CP组中的显性和非常数侧，以及两种大学群与PP组之间的侧面不同。在CP组中，肱骨头表面的平均胡在Nondominant与显性侧（p = .035）较大。在主导方面，CP在CP与PP组中的平均HU与PP组（分别为0.027分别）更大。结论：胶质环节关节关节表面的应力分布受俯仰能力和竞争水平的影响。我们的分析表明，在俯仰期间，Glenohumern接合表面上的牵引力可能大于压缩力。临床相关性：本研究结果表明，俯仰活性导致胶质形颈关节关节表面的应力低。这支持机械条件在特异于俯仰活动的疾病病因中发挥至关重要作用的观点。

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