Initiatory biomechanical study on humeral head migration after coracoacromial ligament cut.
作者信息
Chen Jian, Budoff Jeffrey E, Luo Cong-Feng, Luo Zong-Ping
机构信息
Shanghai Jiaotong University Affiliated Shanghai Sixth People's Hospital, Shanghai, 200233, China.
出版信息
Arch Orthop Trauma Surg. 2009 Jan;129(1):133-7. doi: 10.1007/s00402-008-0580-3. Epub 2008 Jan 22.
OBJECT
To design and evaluate the strength of muscles in preventing humeral head migration after acromioplasty by biomechanical research on cadaver models.
METHODS
Six fresh shoulder cadavers were studied. The coracoacromial ligament cut model was prepared in five shoulders for the study. Different forces were applied to the head of humerus with designed strengthened force on rotator cuff muscles. The results were calculated with SPSS software.
RESULTS
The anterior and superior pulling force caused obvious migration of humeral head in coracoacromial ligament cut model; after strengthening the rotator cuff muscles, especially the supraspinatus and subscapular muscle, the humeral head migration was reduced.
CONCLUSION
Modified acromioplasty with supraspinatus and subscapular muscle, strengthened in our experiment, helped to control the migration of humeral head.
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