Performance of the tibial component in total knee replacement.

摘要: In patients with deficient bone in the proximal end of tibia, mechanical support a conventional total knee replacement may be inadequate. We have developed custom design for use situations which there is extensive deficiency tibial cancellous bone. To do this, we examined and prosthetic components using finite-element analysis. Several loading configurations were tested, worst conditions found to those eccentric loads placed on margin component. The results showed that stresses beneath conventional-design prosthesis lowered if metal tray peg are employed. A salvage-design concept revision presence was tested analytically used successfully. This requires some portion applied load transferred directly cortical shell. Stresses remaining by combination thickened buttress. Clinical Relevance: study demonstrates advantage trays plateau suggests they should whenever supporting insufficient. knees large defects bone, direct transfer shell through prosthesis, made possible design, appears necessary.