[Dislocation of the thumb saddle joint as a rare sports injury]

This report deals with 4 dislocations of the carpometacarpal joint of the thumb during the period 1957-1983 as an injury caused by sports. 3 dislocations could be found in boxing, one was caused by a fall from a horizontal bar. All of them were closed: two times the dislocation was to the dorsal, one to the dorso-ulnar and one to the dorso-radial side. Closed dislocations do not require operative treatment. Reduction and immobilisation for four weeks in a plaster splint with inclusion of the thumb were sufficient, recurrence of the dislocation did not occur. Correct bandage and the use of effective boxing gloves are of great importance.