Burgess R C
Department of Surgery, University of Kentucky, Lexington 40536.
J Hand Surg Am. 1987 Sep;12(5 Pt 1):774-6. doi: 10.1016/s0363-5023(87)80067-9.
A scaphoid malunion results when a scaphoid fracture heals in a flexed position or when a scaphoid nonunion with carpal collapse is grafted without correction of the angular deformity. The effects of scaphoid malunion on wrist motion were simulated in a cadaveric study. It was found that the loss of wrist extension is proportional to the angular deformity. Loss of radiocarpal extension occurred at 15 degrees of angulation and loss of midcarpal extension occurred at 30 degrees of angulation.
当舟状骨骨折在屈曲位愈合，或在未矫正角状畸形的情况下对伴有腕骨塌陷的舟状骨不愈合进行植骨时，就会导致舟状骨畸形愈合。在一项尸体研究中模拟了舟状骨畸形愈合对腕关节活动的影响。研究发现，腕关节伸展功能的丧失与角状畸形成正比。当成角15度时桡腕关节伸展功能丧失，成角30度时腕中关节伸展功能丧失。
