Loebig T G, Anderson D D, Baratz M E, Imbriglia J E
Allegheny-Singer Research Institute, Medical College of Pennsylvania, Pittsburg, USA.
J Hand Surg Br. 1995 Feb;20(1):102. doi: 10.1016/s0266-7681(05)80026-9.
Human cadaver thumbs were tested to evaluate stability of the radial side of the MP joint. The contributions of the dorsal capsule, radial collateral ligament, accessory collateral ligament, and volar plate were examined with the joint in 0 degrees and 30 degrees of flexion. At 0 degrees flexion, the average joint angulation increased 4 degrees following isolated radial collateral ligament transection and 6 degrees following isolated accessory collateral ligament transection. Release of both the accessory and radial collateral ligaments produced marked instability with joint angulation of at least 46 degrees. The accessory collateral ligament helped to stabilize the extended MP joint. There were no significant contributions to stability from the dorsal capsule and volar plate when the collateral ligaments were intact. In the laboratory setting, radial-side instability of the MP joint of the thumb requires transection of both the proper and accessory radial collateral ligament.
对人类尸体拇指进行测试，以评估掌指关节桡侧的稳定性。在关节处于0度和30度屈曲时，检查背侧关节囊、桡侧副韧带、副侧副韧带和掌板的作用。在0度屈曲时，单纯切断桡侧副韧带后，平均关节角度增加4度，单纯切断副侧副韧带后增加6度。同时切断副侧副韧带和桡侧副韧带会导致明显的不稳定，关节角度至少为46度。副侧副韧带有助于稳定伸展的掌指关节。当侧副韧带完整时，背侧关节囊和掌板对稳定性无显著作用。在实验室环境中，拇指掌指关节的桡侧不稳定需要切断桡侧固有副韧带和桡侧副韧带。
