The biplane frame: modified compression arthrodesis of the knee.

For many years knee arthrodesis has been recommended for patients with severe degenerative disease complicated by obesity, venous insufficiency or old sepsis. Recently, failed total knee arthroplasties are being treated by arthrodesis, but these new indications entail new and difficult circumstances. A biplane fixation frame, more rigid than the Charnley clamp, and the instrumentation for producing absolutely flat opposing surfaces are important. The frame provides the advantages of good access to the wound and permits early ambulation. Pin tract loosening and infection are potential disadvantages, but in this small series were not significant.