Effect of modular neck variation on bone and cement mantle mechanics around a total hip arthroplasty stem.

摘要: Abstract Background Total hip arthroplasty carried out using cemented modular-neck implants provides the surgeon with greater intra-operative flexibility and allows more controlled stem positioning. Methods In this study, finite element models of a whole femur implanted either Exeter or new total (separate, neck components) were developed. The changes in bone cement mantle stress/strain assessed for varying amounts offset version angle device two simulated physiological load cases: walking stair climbing. Since is gold standard polished design, stresses/strains compared results Exeter. Findings For cases, stresses strains similar all geometries. These comparable to mechanics surrounding findings suggest that modular distribute stress manner. Interpretation It anticipated will have short-term clinical performance Exeter, additional advantages increased modularity.