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Please use this identifier to cite or link to this item: http://hdl.handle.net/10564/3552

Title: Three-Dimensional Kinematic Analysis of the Distal Radioulnar Joint in the Axial-Loaded Extended Wrist Position.
Other Titles: 手関節伸展荷重時の遠位橈尺関節の3次元動態解析
Authors: Hojo, Junya
Omokawa, Shohei
Iida, Akio
Ono, Hiroshi
Moritomo, Hisao
Tanaka, Yasuhito
Keywords: Distal radioulnar joint
extended wrist
ligaments
loaded wrist
3-dimensional kinematic analysis
Issue Date: Apr-2019
Publisher: Elsevier
Citation: The Journal of hand surgery Vol.44 No.4 p.336.e1-336.e6 (2019 Apr)
Abstract: PURPOSE: To assess the wrist joints of healthy volunteers in extended and loaded states versus the unloaded state by using computed tomography (CT) to analyze the in vivo 3-dimensional movements in the distal radioulnar joint (DRUJ). METHODS: The dominant arms of 9 volunteers with healthy wrists were studied. We mounted a compression device onto the elbows in an inverted position. A 0-kg and 7-kg load each was applied during low-dose radiation CT imaging and a bone model was produced. We marked the insertion sites for the 4 radioulnar ligaments stabilizing the DRUJ: palmar superficial radioulnar ligament (PS-RUL), dorsal superficial radioulnar ligament (DS-RUL), dorsal deep radioulnar ligament (DD-RUL), and palmar deep radioulnar ligament (PD-RUL). Using Marai's method, each ligament was virtualized and the length of each simulated ligament was measured. We also computed the 3-dimensional displacement and corresponding rotation of the distal ulna where it comes into contact with the radius in the sigmoid notch. RESULTS: The lengths of palmar ligaments (PS-RUL and PD-RUL) increased significantly under loaded conditions, and although not significant, the length of dorsal ligaments (DS-RUL and DD-RUL) tended to increase. When the wrist was loaded, the ulna rotated toward the open palmar side. CONCLUSIONS: The length of simulated radioulnar ligaments increased when the wrist joint was loaded in an extended position. This kinematic movement of DRUJ separation under a loading condition is different from physiological active movement. CLINICAL RELEVANCE: The 3-dimensional kinematic analysis revealed that palmar radioulnar ligaments were stretched during axial loading, suggesting that a tear of the palmer ligament can result from a fall on an outstretched hand.
Description: 博士(医学)・甲第704号・平成31年3月15日
© 2019 by the American Society for Surgery of the Hand. All rights reserved.
URI: http://hdl.handle.net/10564/3552
ISSN: 03635023
Academic Degrees and number: 24601A704
Degree-granting date: 2019-03-15
Degree name: 博士(医学)
Degree-granting institutions: 奈良県立医科大学
Appears in Collections:2018年度

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