Li G, Rowen B, Tokunaga D, Ryu J, Kato H, Kihira M
Orthopedic Biomechanics Lab, Texas Tech Univ. Health Science Center, El Paso.
Biomed Sci Instrum. 1991;27:273-81.
The purpose of this study is to investigate the carpal kinematics after serial arthroscopic sectioning of the ligaments at the lunotriquetral joint, without damaging the capsule and other soft tissues of the wrist. Six cadaver wrists were studied and a custom designed three-dimensional mechanical digitizer was utilized. Three sets of digitization were performed for a normal state, after arthroscopic sectioning of lunotriquetral interosseous ligament (stage A), and after further sectioning of volar radiolunotriquetral ligament (stage B). Motion of the scaphoid, lunate, triquetrum, capitate and hamate was studied. The results indicated that the motion of the triquetrum was significantly increased at stage A, particularly after 15 degrees of ulnar deviation. An increased motion at the lunotriquetral joint was observed at stage B, which was mainly due to the significantly decreased lunate extension motion and the increased triquetrum extension motion during wrist extension. This study suggested that the lunotriquetral interosseous ligament plays the most important role for the stabilization of the lunotriquetral joint during wrist ulnar deviation, while the volar radiolunotriquetral ligament may function as a stabilizer for the lunotriquetral joint during wrist extension.
本研究的目的是在不损伤腕关节囊和其他软组织的情况下，通过对月三角关节韧带进行系列关节镜下切断，来研究腕关节的运动学。对六具尸体手腕进行了研究，并使用了定制设计的三维机械数字化仪。在正常状态、关节镜下切断月三角骨间韧带后（A阶段）以及进一步切断掌侧桡月三角韧带后（B阶段）分别进行了三组数字化测量。研究了舟骨、月骨、三角骨、头状骨和钩骨的运动。结果表明，在A阶段三角骨的运动显著增加，尤其是在尺偏15度之后。在B阶段观察到月三角关节运动增加，这主要是由于在腕关节伸展时月骨伸展运动显著减少以及三角骨伸展运动增加所致。本研究表明，月三角骨间韧带在腕关节尺偏时对月三角关节的稳定起着最重要的作用，而掌侧桡月三角韧带在腕关节伸展时可能作为月三角关节的稳定器发挥作用。
