Mineralisation patterns in the subchondral bone plate of the humeral head

被引:11
|
作者
Zumstein, Valentin [1 ]
Kraljevic, Marko [1 ]
Huegli, Rolf [2 ]
Muller-Gerbl, Magdalena [1 ]
机构
[1] Univ Basel, Inst Anat, CH-4056 Basel, Switzerland
[2] Kantonsspital Bruderholz, Inst Radiol & Nucl Med, CH-4101 Bruderholz, Switzerland
关键词
Mineralisation; Subchondral bone; Humeral head; Glenohumeral joint; CT-OAM; GLENOID CAVITY; DENSITY; STRESS; JOINTS; OSTEOABSORPTIOMETRY; ADAPTATION;
D O I
10.1007/s00276-011-0819-5
中图分类号
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号
100101 ;
摘要
Purpose Pathologic changes of the glenohumeral joint, like a long-standing overloading or an accident often lead to severe glenohumeral osteoarthritis, and a glenohumeral joint replacement could be necessary. Joint instability and glenoid loosening are the most common post-operative complications, which can be caused by eccentric loading of the glenoid, if the humeral head is malcentered. If these malcentered cases could be identified pre-operatively, the pathologic position of the humeral head could be fixed intra-operatively and complication may be prevented. Computed tomography osteoabsorptiometry (CT-OAM) is a useful method to determine the distribution of mineralisation in the subchondral bone as a marker for the longterm loading history of a joint. The objective of this study was to gain information about the mineralisation distribution in the subchondral bone plate of the humeral head. Methods By the use of CT-OAM, the distribution of the subchondral mineralisation of 69 humeral heads was investigated and groups of mineralisation patterns were built. To evaluate if differences in age exist, the mean values of the two groups were compared using t test. Results 49 humeral heads (71% of 69 specimens) showed bicentric subchondral mineralisation patterns with ventral and dorsal maxima, 20 humeral heads (29% of 69 specimens) could be classified as monocentric with a centrodorsal maximum. We found no statistical significant difference between the age of the monocentric and the bicentric group on a significance level of 95%. Conclusion We could show that stress distribution at the humeral head is typically bicentric with a ventral and dorsal maximum. However, other mineralisation patterns may occur under pathologic circumstances. The pre-operative identification of such cases by the use of CT-OAM could help to improve the post-operative results in shoulder surgery.
引用
收藏
页码:775 / 779
页数:5
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