Dorsal wrist ligament insertions stabilize the scapholunate interval: cadaver study.
This study examined sequential arthroscopic sectioning of volar, interosseous, and dorsal ligaments about the scapholunate complex in cadaver wrists. We attempted to clarify the contributions of the dorsal ligamentous complex to scapholunate instability and carpal collapse. We found that after sequential sectioning of volar ligaments and the scapholunate interosseous ligament, no scapholunate diastasis or excessive scaphoid flexion occurred. After dividing the dorsal intercarpal ligament, scapholunate instability occurred without carpal collapse. With sectioning of the dorsal radiocarpal ligament from the lunate, a dorsal intercalated scapholunate instability deformity ensued. This information may be of value in comprehending the pathogenesis of scapholunate instability and carpal collapse and in devising the rationales for conservative measures and surgical intervention.
Department of Orthopaedic Surgery, Wake Forest University School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA. gelsaidi@wfubmc.edu
Gamal A
GA
Elsaidi
David S
DS
Ruch
Gary R
GR
Kuzma
Beth Paterson
BP
Smith
D001182:Arthroscopy; D002102:Cadaver; D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging; D008023:Ligaments, Articular / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D012667:Lunate Bone / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D011859:Radiography; D021361:Scaphoid Bone / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D014955:Wrist Joint / Q000033:anatomy & histology* / Q000000981:diagnostic imaging