The superior capsule of the shoulder joint complements the insertion of the rotator cuff
The superior capsule of the shoulder joint complements the insertion of the rotator cuff
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DOI：
10.1016/j.jse.2011.04.034
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发表时间：
2012-07-01
影响因子：
3
通讯作者：
Akita, Keiichi
中科院分区：
文献类型：
--
作者：
Nimura, Akimoto;Kato, Atsuo;Akita, Keiichi
背景：迄今为止，还没有关于上级肩关节关节囊附着的研究。本研究的目的是测量肱骨上关节囊附件的宽度，并阐明解剖学和足迹的肩袖。方法：关节囊附件的大结节暴露。测量关节囊附着处的宽度和肩袖的足印面。最大囊宽位于冈下肌与小圆肌交界处，为9.1 mm，最小囊宽为3.5 mm，位于大结节前缘后10.9mm、冈上肌后缘前1.5mm处。由于实际肩袖插入和关节囊之间缺乏区分，之前的研究高估了肩袖足迹宽度。肩关节关节囊的附着占据了大结节的相当大的区域。特别是在冈下肌和小圆肌之间的边界处，关节囊的非常厚的附着弥补了肌肉成分附着的缺乏。关节囊最薄点位于大结节前缘后方11 mm处，非常靠近冈上肌锥形插入的后缘，这可能是退行性肩袖撕裂的病因。证据等级：基础科学研究，解剖学研究。(C)2012年《肩肘外科杂志》董事会。
Background: To date, there are no studies about the attachment of the articular capsule of the superior shoulder joint. The aim of this study was to measure the width of the attachment of the articular capsule on the humerus, and to clarify the anatomy and the relationship to the footprint of the rotator cuff.Methods: The attachment of the articular capsule on the greater tuberosity was exposed. The width of the attachment of the capsule and the footprint of the rotator cuff were measured.Results: The maximum capsular width was located at the border between the infraspinatus and the teres minor, and measured 9.1 mm. The minimum capsular width was 3.5 mm, and it was located at 10.9 mm posterior to the anterior margin of the greater tuberosity and 1.5 mm anterior to the posterior margin of the supraspinatus.Conclusion: Prior studies have overestimated the rotator cuff footprint width due to the lack of discrimination between the actual cuff insertion and capsule. The attachment of the articular capsule of the shoulder joint occupied a substantial area of the greater tuberosity. In particular, at the border between the infraspinatus and the teres minor, the very thick attachment of the articular capsule compensated for the lack of attachment of muscular components. The thinnest point of the articular capsule was 11 mm posterior to the anterior margin of the greater tuberosity and very close to the posterior edge of the tapered insertion of the supraspinatus, which could contribute to the etiology of degenerative rotator cuff tears.Level of evidence: Basic Science Study, Anatomic Study. (C) 2012 Journal of Shoulder and Elbow Surgery Board of Trustees.