Primary fusion in worker's compensation intraarticular calcaneus fracture. Prospective study of 169 consecutive cases.

Abstract

To study the results of reconstruction and primary fusion in worker's compensation intraarticular calcaneus fractures. We carried out a prospective study of 169 acute intraarticular calcaneus fractures treated by reconstruction and primary fusion with the minimally invasive Vira® system, in severe calcaneus fractures. The evaluation was performed by clinical, radiological and biomechanical analysis. AOFAS score averaged 77.26 points at the end of follow up. Forty-two cases (24.9%) obtained excellent results, 108 (63.9%) good, 12 (7.1%) mild and 7 (4.1%) poor. The improvement in Börder's angle after surgery was significant (p = 0.05) and this did not vary during the follow up. Subtalar arthrodesis was achieved in all cases and only three cases needed bone grafting. Five major post-surgical complications were observed, and one deep infection in a case of open Gustilo Grade III fracture. In the kinetic study, the support time of the operated foot was lower than that of the contralateral foot (p<0.21). The axial force of the heel contact and the single limb support of the operated foot reduced the toe-off axial forces. In the foot with arthrodesis the posterior forces increased (p <0.01). The pressures were lower in the region of the heel and the mid-foot and in the external part of the forefoot, and increased in the big toe. Calcaneal workplace injuries are challenging to treat. Primary subtalar fusion with a minimally invasive method allows rapid recovery for these patients with a satisfactory clinical, functional and radiological outcome.