Forearm Interosseous Membrane Maintains the Stability of Proximal Radioulnar Joint

Objective To evaluate the effect of the proximal and central bundles of the interosseous membrane on the stability of proximal radioulnar joint. Methods Twenty fresh samples of human forearm provided by the anatomy room of the Department of Human Anatomy of Nanjing Medical University were included in this study. They were used to explore the effect of proximal interosseous membrane bundle on the stability of proximal radioulnar joint. The proximal bundle was reconstructed along the original attachment point. The reconstructions of central bundle were divided into the reconstruction of original attachment point on radius‐midpoint of the ulnar original attachment point (reconstruction A) and original attachment point reconstruction (reconstruction B). The loads of the proximal radioulnar joint in different positions were measured. The load of the proximal radioulnar joint was analyzed in neutral, pronation, and supination positions. Results After resection of proximal and central fascicles, the loads of proximal radioulnar joint in neutral, pronation, and supination positions were significantly lower than those before resection (P 0.05). In supination position, the load of reconstruction B was higher than that of reconstruction A (P
Resect proximal and central fascicles of forearm interosseous membrane. Reconstruct the central bundle along the central bundle original attachment point on radius – midpoint of the ulnar original attachment point. Reconstruct the central bundle along the original attachment point. Reconstruct the proximal bundle along the original attachment point. The stability of proximal radioulnar joint is affected by the central bundle and proximal bundle. Reconstruction can increase the stability of proximal radioulnar joint.