Abstract
1. The problem of gap defects in the forearm bones and its solution by radio-ulnar fusion is discussed.
2. Seven patients with radio-ulnar fusions are presented. In four patients the operation was done for defects in the ulna, in two for defects in the radius, and in one for non-union of the radius and ulna after fracture.
3. The good cosmetic and functional result after radio-ulnar fusion is emphasised.