Biomechanical study of isolated radial head dislocation

Isolated radial head dislocation is a rare injury with an unclear pathomechanism, and the treatment is controversial. The purpose of the present study was to investigate the biomechanical contributions of the annular ligament, quadrate ligament, interosseous membrane, and annular ligament reconstruc...

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Bibliographic Details
Published in:BMC musculoskeletal disorders 2017-11, Vol.18 (1), p.470-470, Article 470
Main Authors: Hayami, Naoki, Omokawa, Shohei, Iida, Akio, Kraisarin, Jirachart, Moritomo, Hisao, Mahakkanukrauh, Pasuk, Shimizu, Takamasa, Kawamura, Kenji, Tanaka, Yasuhito
Format: Article
Language:English
Subjects:
Annular ligament
Biomechanical study
Comparative analysis
Electromagnetism
Interosseous membrane
Ligament reconstruction
Orthopedic surgery
Quadrate ligament
Radial head dislocation
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Summary:Isolated radial head dislocation is a rare injury with an unclear pathomechanism, and the treatment is controversial. The purpose of the present study was to investigate the biomechanical contributions of the annular ligament, quadrate ligament, interosseous membrane, and annular ligament reconstructions to proximal radioulnar joint stability. Five fresh frozen cadaveric upper extremities were amputated above the elbow and solidly fixed on a customized jig. Radial head dislocation was reproduced by sequential sectioning of ligamentous structures and passive mobility testing. Radial head displacement during mobility testing was measured with an electromagnetic tracking device in three forearm rotation positions. The data were compared among different sectioning stages and between two types of simulated ligamentous reconstruction. Lateral displacement of the radial head significantly increased in the neutral forearm rotation after annular ligament sectioning (46 ± 10%, p 
ISSN:1471-2474
1471-2474
DOI:10.1186/s12891-017-1829-1