%0 Journal Article
%T Three
%A Hideki Yoshikawa
%A Hisao Moritomo
%A Kazuomi Sugamoto
%A Kenji Kasubuchi
%A Kunihiro Oka
%A Shingo Abe
%A Tsuyoshi Murase
%J Journal of Hand Surgery (European Volume)
%@ 2043-6289
%D 2018
%R 10.1177/1753193417744420
%X The purpose of this study was to investigate the differences in three-dimensional carpal kinematics between type 1 and 2 lunates. We studied 15 instances of wrist flexion to extension (nine type 1, six type 2), 13 of radial to ulnar deviation (seven type 1, six type 2), and 12 of dart-throwing motion (six each of type 1 and 2) in 25 normal participants based on imaging with computerized tomography. Mean proximal translation of the distal articular midpoint of the triquetrum relative to type 2 lunates during wrist radioulnar deviation was 2.9£żmm (standard deviation (SD) 0.7), which was significantly greater than for type 1 lunates, 1.6£żmm (SD 0.6). The hamate contacted the lunate in ulnar deviation and ulnar flexion of wrists with type 2 lunates but not with type 1. We conclude that the four-corner kinematics of the wrist joint are different between type 1 and 2 lunates
%K Lunate morphology
%K three-dimensional kinematics
%K wrist
%K carpal bones
%K lunotriquetral ligament
%K hamate arthrosis
%U https://journals.sagepub.com/doi/full/10.1177/1753193417744420