The importance of the ulnar side of the wrist in fractures of the distal end of the radius.

In a series of 81 fractures of the distal end of the radius, 20% had unsatisfactory results. Damage to the ulnar collateral mechanism adversely affects the clinical result despite a good anatomical result. Immobilization of injuries to the ulnar collateral mechanism should be in pronation and ulnar deviation even when there is no significant radial displacement.