Cemented polyethylene cups in patients younger than 40 years

Long-term success of hip implants in young patients remains uncertain. Prior research has shown that uncemented cups may not always provide durable fixation in younger populations. This gap motivated the exploration of alternative implant fixation methods. No prior work had resolved the optimal strategy for acetabular reconstruction in young adults. Established knowledge shows that cemented implants have been used historically for stability. However, concerns about cemented cup longevity persist in younger patients. The need for reliable implant fixation in this age group remains unmet. This uncertainty drove the investigation into cemented cup survival rates.

The aim was to assess the midterm survival of cemented acetabular cups in patients under 40 years old. The specific problem is the lack of consensus on implant fixation methods for young patients. Motivation comes from observed challenges with uncemented cups in this demographic. The study sought to determine if cemented cups offer acceptable survival rates. It also aimed to evaluate the impact of bone impaction grafting on outcomes. The focus was on revision rates and causes in this age group. The goal was to provide evidence-based guidance for implant selection. This study addresses a clinical need for durable solutions in young patients.

A prospective cohort study was conducted with 130 patients and 175 cemented cups. Patients were under 40 years old at the time of surgery. Follow-up data was collected with no loss to follow-up. The mean age at surgery was 31 years, ranging from 16 to 39. Bone impaction grafting was used in 48% of cases. The minimum follow-up duration was 2 years, averaging 8.1 years. Revision reasons were categorized and recorded. The study evaluated survival rates using standard endpoints.

Of 175 cups, 21 (12%) required revision at an average of 8.1 years. Infection accounted for 8 revisions, with one early and seven late cases. Recurrent dislocations led to two revisions, and traumatic loosening to one. Aseptic loosening was the cause in 10 revisions. The 10-year survival rate with any revision as the endpoint was 85%. For aseptic loosening alone, survival was 92%. Cups with impaction grafting had 95% survival for aseptic loosening. Cups without grafting had 90% survival for the same endpoint.

The authors propose that cemented cups in young patients have acceptable midterm survival. They suggest that cemented cups remain a viable option despite age-related concerns. The study supports the use of cemented cups in primary THA for this age group. In cases of acetabular bone defects, the authors recommend bone impaction grafting. The data shows improved survival with grafting for aseptic loosening. The findings align with the authors' prior clinical experience. The study does not claim cemented cups are superior in all cases. The authors state that their conclusions are based on observed outcomes.