TY - JOUR
T1 - Effect of decrease in radial inclination of distal radius fractures on distal radioulnar joint stability
T2 - a biomechanical study
AU - Bessho, Yuki
AU - Nakamura, Toshiyasu
AU - Nishiwaki, Masao
AU - Nagura, Takeo
AU - Matsumoto, Morio
AU - Nakamura, Masaya
AU - Sato, Kazuki
N1 - Funding Information:
The authors would like to sincerely thank the Clinical Anatomy Laboratory, Department of Anatomy, School of Medicine, Keio University, Japan, for allowing access to the fresh cadaver upper extremity specimens.
Publisher Copyright:
© The Author(s) 2018.
PY - 2018/11/1
Y1 - 2018/11/1
N2 - We investigated the relationship between the radial inclination of the distal radius and distal radioulnar joint stability. Six fresh-frozen upper extremities were used. Radial inclination was decreased by 10° and 20° and increased by 10° from the original radial inclination. Distal radioulnar joint stiffness was assessed with an intact radioulnar ligament and after partial and then complete sectioning of the radioulnar ligament. Radial angulation deformities significantly increased distal radioulnar joint stiffness when the radioulnar ligament is totally or partially attached to the ulnar fovea. After complete sectioning of the radioulnar ligament, distal radioulnar joint stiffness decreased significantly; additional radial angulation deformity slightly increased distal radioulnar joint stiffness, but the distal radioulnar joint never recovered to the original stiffness. Based on the results, radial angulation deformities of the distal radius should be corrected within 10° when the radioulnar ligament is intact, to reduce the risk of symptomatic distal radioulnar joint instability.
AB - We investigated the relationship between the radial inclination of the distal radius and distal radioulnar joint stability. Six fresh-frozen upper extremities were used. Radial inclination was decreased by 10° and 20° and increased by 10° from the original radial inclination. Distal radioulnar joint stiffness was assessed with an intact radioulnar ligament and after partial and then complete sectioning of the radioulnar ligament. Radial angulation deformities significantly increased distal radioulnar joint stiffness when the radioulnar ligament is totally or partially attached to the ulnar fovea. After complete sectioning of the radioulnar ligament, distal radioulnar joint stiffness decreased significantly; additional radial angulation deformity slightly increased distal radioulnar joint stiffness, but the distal radioulnar joint never recovered to the original stiffness. Based on the results, radial angulation deformities of the distal radius should be corrected within 10° when the radioulnar ligament is intact, to reduce the risk of symptomatic distal radioulnar joint instability.
KW - Distal radioulnar joint
KW - biomechanical study
KW - distal radius fracture
KW - radial inclination
KW - stability
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U2 - 10.1177/1753193418761266
DO - 10.1177/1753193418761266
M3 - Article
C2 - 29512418
AN - SCOPUS:85043470054
VL - 43
SP - 967
EP - 973
JO - Journal of Hand Surgery
JF - Journal of Hand Surgery
SN - 0266-7681
IS - 9
ER -