Influence of assembly procedure and material combination on the strength of the taper connection at the head-neck junction of modular hip endoprostheses.

摘要: Abstract Background A stable fixation between femoral head and endoprosthesis taper is necessary to prevent relative motions corrosion at the junction. Although importance of component assembly has been recognised, no definitive instructions are available. The purpose this study was assess influence force, tool number hammer strokes on junction strength various material combinations. Methods Co–Cr29–Mo ( n  = 10) Ti–6Al–4V neck tapers were assembled with Co–Cr Al 2 O 3 ceramic heads either by push-on or impaction single multiple blows. taper-head connection evaluated measuring pull-off forces according ISO 7206-10 turn-off moment capacity. Findings linearly increased P Interpretation It suggested that sufficient head–taper in all bearing conditions achieved least 4 kN. impact achieve fixation. Special attention should be paid tapers.