Mid-tarsal and tarsometatarsal arthrodesis for primary degenerative osteoarthrosis or osteoarthrosis after trauma.

We report the long-term results of arthrodesis of the mid-tarsal and tarsometatarsal joints, performed for osteoarthrosis after dislocation with or without a fracture (seventeen patients [seventeen feet]), for primary degenerative osteoarthrosis (twenty-one patients [twenty-two feet]), or for inflammatory arthritis (two patients [two feet]). All forty patients (forty-one feet) had a severe loss of function because of pain. The average age of the patients who had primary degenerative osteoarthrosis was sixty years (range, twenty-seven to seventy-five years) and that of the patients who had post-traumatic osteoarthrosis was forty years (range, twenty-three to sixty-seven years); the two patients who had inflammatory arthritis were forty-four and seventy years old. Thirty-seven patients (thirty-eight feet; 93 per cent) were satisfied with the results of the procedure after an average duration of follow-up of six years (range, two to seventeen years). Union was achieved after 176 (98 per cent) of the 179 attempted arthrodeses, and only one of the three non-unions necessitated an operative repair. A skin slough developed in two patients, one of whom needed operative débridement. Five patients noted at least one prominent metatarsal head postoperatively, but none of these patients needed débridement because of abnormal callus formation. A stress fracture of the second metatarsal developed in three patients, but all three fractures responded to immobilization of the foot. An incisional neuroma developed in three patients, but none of these patients needed additional treatment. We believe that patients who have a severe loss of function due to osteoarthrosis of the mid-tarsal or tarsometatarsal joints can be managed successfully with tarsometatarsal or mid-tarsal arthrodesis, or both.