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Abstract
The results of extension block Kirschner wire fixation for the treatment of mallet fractures of the distal phalanx were retrospectively assessed in 22 consecutive patients. The indications for this technique were the presence of a large bone fragment, and palmar subluxation or the loss of joint congruity of the distal interphalangeal joint. Using the Wehbé and Scheider classification there were 18 patients type I (82 %) with 8 cases (36 %) of subtype A and 10 cases (46 %) of subtype B, and there were 4 cases were type II (18 %) with 3 cases (13 %) of subtype A and 1 case (5 %) of subtype B fractures. According to the Crawford rating system there were seven cases (32 %) with excellent evaluation while 13 cases (59 %) were good and another two cases (9 %) were poor results. We believe that this technique, when properly applied, produces satisfactory results