[Treatment of the rupture of ulnar collateral ligament of metacarpophalangeal ligament of the thumb, surgical treatment of chronic instability.].

The author presents possible solutions of both acute rupture and chronic lesion of metacarpophalangeal ligament of the thumb of the hand. Chronic post-trauma instability is indicated by the author for modified reconstruction of the ligament after Strandell. Since 1991 such operation was performed in 12 patients who were followed with an average interval 3 years after the surgery. The mentioned evaluation scheme showed 8 excellent and 4 good results of the operation. Key words: metacarpophalangeal joint, ulnar collateral ligament, reconstruction of ligament rupture.