Which of the following is a reason to select a cementless acetabular component in hip arthroplasty?

• A. Good bone quality in younger patients
• B. Lower cost
• C. Shorter operative time
• D. Greater familiarity of the surgeon

Answer: (A)

Choosing a cementless acetabular component centers on the bone’s ability to achieve durable biological fixation through osseointegration. Cementless cups are designed with a porous, rough surface that invites bone to grow into and around the implant, creating a stable, long-lasting bond as the bone remodels. This process works best when the patient has good bone quality and healthy bone stock, which is typically found in younger patients. In these individuals, the host bone can reliably ingrow into the cup, providing durable fixation that can outlast cemented options in the long term, given their higher activity level and longer life expectancy.

Other factors like lower cost, shorter operative time, or the surgeon’s familiarity with a technique can influence decisions, but they do not define the suitability of a cementless cup as strongly as the ability of the bone to achieve ingrowth does.