The use of bone morphogenic protein-7 (OP-1) in the management of resistant non-unions in the upper and lower limb

Abstract

The aim of the present study was to investigate the safety and efficacy of local implantation of BMP-7 for the treatment of resistant non-unions in the upper and lower limb. Fifty-two patients (30 males, mean age 52.8 years; range 20-81) were treated with local BMP-7 implantation in a bovine bone-derived collagen paste with or without revision of fixation. Thirty-six patients had closed injuries, ten had open injuries and six had infected non-unions. Patients had undergone a mean of 2 (1-5) operations prior to implantation of BMP-7. Clinical and radiological union was achieved in 94% at a mean time of 5.6 months (3-19). Two patients with subtrochanteric femoral fractures failed to achieve union secondary to inadequate fracture stabilisation, persistent unfavourable biological environment and systemic co-morbidities. One patient developed synostosis attributed to the BMP-7 application. This study demonstrates BMP-7 implanted in a bovine-derived collagen paste is an effective adjunctive treatment for resistant non-unions in the upper and lower limb.