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《Chinses Journal of Hand Surgery》 1996-02
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Biomechanical study of carpal bones after lunate excision and pisiform implantation

Li Tao, Yang Zhiming. (Department of Orthopedic Surgery,First University Hospital of West China University of Medical Sciences,Chengdu, Sichuan 610041)  
To provide biomechanical basis for treating ischemic lunate necrosis using lunate excision, pedicled pisiform implantation and intercarpal fusion, 10 upper limbs from cadavers were used. Scaphoid-capitate fusion and scaphoid-trapezoid-trapezium fusion were performed before and after lunate excision and after pisiform implantation. Strain gouges were applied to detect the stress on carpal bones under continuous loading. Results.(1) When the carpal bones were intact, the stress on the capitate and lunate was the greatest. (2)When the lunate was excised, the change of the stress on the carpal bones showed no regularity. (3)After pisiform implantation, the stress on the pisiform was the greatest. (4)After intercarpal fusion, the stress on the pisiform was minimum. We conclude that selective intercarpal fusion is effective to decrease the stress on the pisiform after implantation.
【Fund】: 国家自然科学基金
【CateGory Index】: R687.3
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