Tricalcium phosphate bone substitute in corrective osteotomy of the distal radius

Abstract

Aim: To evaluate the outcome of using tricalcium phosphate (TCP) as void filler and structural support in corrective opening-wedge osteotomy of the distal radius.

Methods: A consecutive series of 17 patients with malunited dorsally angulated distal radius fracture underwent corrective osteotomy using plates, screws and TCP blocks. Results were evaluated postoperatively with DASH at 6 months with radiography at 8-12 weeks and 0.5-3.5 years.

Results: Mean DASH score improved from 52 (S.D. 22) preoperatively to 30 (S.D. 22) postoperatively. There was one non-union. There was also a mean loss of radial length of 1.1mm (S.D. 1.0mm) between the first postoperative radiograph and final follow-up. Radiolucent zones were observed around the TCP grafts after 6-8 weeks in 10/14 cases, but could not be statistically correlated with the slight loss of reduction.

Conclusions: TCP seems to be an alternative to iliac crest bone grafting in corrective osteotomies of the distal radius. The shortening observed over time may be attributable to inflammation induced by the TCP.