Effect of wrist position on distal radioulnar joint stability: a biomechanical study.

We investigated distal radioulnar joint (DRUJ) stability in different wrist positions and examined the relative contribution of each ligamentous component of the triangular fibrocartilage complex (TFCC) to DRUJ stability. We used nine fresh-frozen cadavers. The humerus and ulna were fixed at 90° elbow flexion. The radiocarpal unit was translated relative to the ulna in dorsopalmar directions with the wrist in five positions. Displacement of the unit was measured by an electromagnetic tracking device. Magnitudes of displacement were compared between different wrist positions in various sectioning stages: ulnocarpal ligament (UCL) sectioning, radioulnar ligaments (RUL) sectioning, and extensor carpi ulnaris (ECU) floor sectioning. Wrist position and sectioning stage significantly influenced the displacement. In intact wrists, the displacement in wrist extension was significantly lower than that in neutral. However, after UCL sectioning, there were no longer any significant differences. After RUL sectioning, the displacement in radial deviation was significantly lower than that in neutral. Following ECU floor sectioning, there were no longer any significant differences. Thus, in intact wrists, DRUJ stability in wrist extension is likely due to tightening of the UCL. After complete RUL sectioning, DRUJ is stabilized in radial deviation due to tightening of the ECU floor.;博士(医学)・甲第636号・平成27年5月28日;© 2014 Orthopaedic Research Society. Published by Wiley Periodicals, Inc.;開始ページ : 1247;終了ページ : 1251;PubMed番号 : http://www.ncbi.nlm.nih.gov/pubmed/24965001

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書名 Effect of wrist position on distal radioulnar joint stability: a biomechanical study.
著作者等 Aoki, Mitsuhiro
Fujimiya, Mineko
Kataoka, Toshiyuki
Moritomo, Hisao
Omokawa, Shohei
Omori, Shinsuke
Tanaka, Yasuhito
Wada, Takuro
和田 卓郎
大森 信介
森友 寿夫
片岡 利行
田中 康仁
藤宮 峯子
青木 光広
面川 庄平
飯田 昭夫
Iida, Akio
書名別名 手関節肢位が遠位橈尺関節の安定性に及ぼす影響
出版元 Wiley / Orthopaedic Research Society
刊行年月 c1983-
ページ数 v.
ISSN 07360266
NCID AA10625350
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言語 英語
出版国 アメリカ合衆国
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