title: A kinematic study of luno-triquetral dissociations.
abstract: 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.
authors.affiliation: Department of Orthopedics, Mayo Clinic/Mayo Foundation, Rochester, MN 55905.
authors.forename: E
authors.initials: E
authors.lastname: Horii
authors.forename: M
authors.initials: M
authors.lastname: Garcia-Elias
authors.forename: K N
authors.initials: KN
authors.lastname: An
authors.forename: A T
authors.initials: AT
authors.lastname: Bishop
authors.forename: W P
authors.initials: WP
authors.lastname: Cooney
authors.forename: R L
authors.initials: RL
authors.lastname: Linscheid
authors.forename: E Y
authors.initials: EY
authors.lastname: Chao
mesh_terms: 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*