Implant Design
A 58-year-old active woman with hip osteoarthritis is scheduled for primary total hip arthroplasty. The surgeon plans to use a cementless press-fit acetabular component. The patient asks about how this implant achieves fixation without cement. Regarding cementless acetabular cups:
Mark each as TRUE or FALSE
Cementless acetabular cups achieve fixation through initial press-fit (interference fit of 1-2mm und...
Ideal pore size for bone ingrowth is 100-400 micrometers; bone grows into (ingrowth) or onto (ongrow...
Cementless cups require cement for primary fixation; bone ingrowth is not possible; pore sizes shoul...
Cup positioning targets 40 degrees inclination and 15-25 degrees anteversion (Lewinnek safe zone); m...
Cementless cups have become the dominant acetabular fixation method with excellent long-term survivo...
Answer the questions to see explanations
Click T (True) or F (False) for each option