Silver-coated megaprostheses in the proximal femur in patients with sarcoma.

BACKGROUND

Proximal femur replacements in patients with sarcoma are associated with high rates of infection. This study is the largest one comparing infection rates with titanium versus silver-coated megaprostheses in sarcoma patients.

METHODS

Infection rates were assessed in 99 patients with proximal femur sarcoma who underwent placement of a titanium (n = 35) or silver-coated (n = 64) megaprosthesis. Treatments administered for infection were also analyzed.

RESULTS

Infections occurred in 14.3% of patients in the titanium group, in comparison with 9.4% of those in the silver group, when the development of infection was the primary end point. The 5- and 10-year event-free survival rates for the prosthesis relative to the parameter of infection were 90% in the silver group and 83% in the titanium group. The overall infection rates were 10.9% in the silver group and 20% in the titanium group. Two patients each in the silver and titanium groups ultimately had to undergo amputation. The need for two-stage prosthesis exchanges (57.1% in the titanium group) declined to 14.3% in the silver group.

CONCLUSION

Using a silver-coated proximal femoral replacement nearly halved the overall infection rate. When infections occurred, it was usually possible to avoid two-stage prosthesis exchanges in the silver group.