[Closed injuries to capsular and ligamentous structure of MP I joint--diagnosis and treatment (author's transl)].

7 new and 9 old injuries of the MP I joint primarily involving the ulnar capsule and ligaments have been reevaluated for treatnent and results. In old cases, the operative result could be classified as excellent and good in 7, while 2 were considered as failures. These results have been used to discuss the mechanism and diagnosis of ruptures of the MP I joint ligaments. Primary surgical treatment of fresh ligamentous injuries is far superior than plastic reconstruction of old injuries.