A kinematic study of luno-triquetral dissociations.
An analysis of carpal motion after sectioning the ligamentous support of the luno-triquetral joints was done by use of stereoradiographic methods. The ligaments were sectioned in two stages. In stage I, a complete sectioning of both the dorsal and palmar luno-triquetral ligaments and the interosseous membrane was done. Stage II consisted of further sectioning of both the dorsal radio-triquetral and dorsal scapho-triquetral ligaments. After both stage I and stage II ligament sectioning, all of the intercarpal joints exhibited altered kinematics. The changes were especially marked at the luno-triquetral joint where motion was increased in all planes of wrist motion. The essential lesion in producing a static palmar flexed intercalated segment instability was division of the dorsal radio-triquetral and dorsal scapho-triquetral ligaments in association with the luno-triquetral ligaments and interosseous membrane sectioning.
Horii
E
E
Department of Orthopedics, Mayo Clinic/Mayo Foundation, Rochester, MN 55905.
Garcia-Elias
M
M
An
K N
KN
Bishop
A T
AT
Cooney
W P
WP
Linscheid
R L
RL
Chao
E Y
EY
D002102:Cadaver; D002348:Carpal Bones / Q000503:physiopathology*; D006801:Humans; D007593:Joint Instability / Q000503:physiopathology*; D008023:Ligaments, Articular / Q000503:physiopathology*; D016059:Range of Motion, Articular / Q000502:physiology; D014954:Wrist Injuries / Q000503:physiopathology*