Faster integration of human allograft bone than of the bovine substitute Lubboc: non-randomized evaluation of 20 cases with benign tumors or tumor-like conditions.

In 20 patients, we studied healing and time for complete integration of human cancellous bone allografts and the bovine substitute Lubboc on plain radiographs. They were all operated on because of benign tumors or tumor-like conditions, and followed until integration of the graft or for at least 1 year after operation. The median follow-up was 10 (2-40) months.

Serum cobalt levels after metal-on-metal total hip arthroplasty.

Background: Systemic cobalt dissemination from the Metasul Co-28Cr-6Mo-0.2C metal-on-metal total hip prosthesis has been demonstrated in the first year after implantation. The aim of this prospective study was to monitor the serum cobalt concentrations in patients during the first five years after total hip arthroplasty with a metal-on-metal articulation.