TY - JOUR
T1 - Ligament length during circumduction of the trapeziometacarpal joint after ligament sectioning
AU - Imaeda, Toshihiko
AU - Niebur, Glen
AU - Cooney, William P.
AU - Linscheid, Ronald L.
AU - An, Kai Nan
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1999
Y1 - 1999
N2 - Thumb motion and stability were examined after sequential division of support ligaments of the trapeziometacarpal (TMC) to simulate the pathologic condition of ligament laxity. The motion obtained with passive circumduction was measured with a magnetic tracking system. The lengths of the TMC joint ligaments were approximated by measuring the distance between origin and insertion of each ligament. The change in this apparent interorigin distance of the ligaments was measured before and after ligament sectioning. The anterior oblique ligament (AOL) and the ulnar collateral ligament (UCL) had the greatest effect on TMC joint stability during circumduction of the thumb. Division of the first intermetacarpal ligament (IML) did not produce a change in apparent length of other ligaments. We conclude that small changes in ligament length affect thumb stability and alter the path of circumduction. Neither the IML or posterior oblique ligaments were major stabilizers of the TMC joint during circumduction, prehensile grasp, or tip pinch. Reconstruction of the AOL and UCL ligaments should be considered for treatment of the initial stages of TMC instability.
AB - Thumb motion and stability were examined after sequential division of support ligaments of the trapeziometacarpal (TMC) to simulate the pathologic condition of ligament laxity. The motion obtained with passive circumduction was measured with a magnetic tracking system. The lengths of the TMC joint ligaments were approximated by measuring the distance between origin and insertion of each ligament. The change in this apparent interorigin distance of the ligaments was measured before and after ligament sectioning. The anterior oblique ligament (AOL) and the ulnar collateral ligament (UCL) had the greatest effect on TMC joint stability during circumduction of the thumb. Division of the first intermetacarpal ligament (IML) did not produce a change in apparent length of other ligaments. We conclude that small changes in ligament length affect thumb stability and alter the path of circumduction. Neither the IML or posterior oblique ligaments were major stabilizers of the TMC joint during circumduction, prehensile grasp, or tip pinch. Reconstruction of the AOL and UCL ligaments should be considered for treatment of the initial stages of TMC instability.
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U2 - 10.1142/S0218957799000191
DO - 10.1142/S0218957799000191
M3 - Article
AN - SCOPUS:33749288396
VL - 3
SP - 183
EP - 194
JO - Journal of Musculoskeletal Research
JF - Journal of Musculoskeletal Research
SN - 0218-9577
IS - 3
ER -