Primary Total Hip Arthroplasty With Duraloc Cup in Patients Younger Than 50 Years: A 5- to 7-Year Follow-Up Study
Section snippets
Materials and Methods
Between January 2000 and September 2002, 82 Duraloc-300 series cups were implanted in 76 consecutive patients who were 50 years or younger at our institution. One patient died 5 years after surgery from unrelated causes. Five patients moved away and were lost to follow-up. Six other patients ceased to return for follow-up after 3 years because they were asymptomatic. No evidence of loosening was apparent radiographically at the last follow-up in this group.
The remaining 64 patients had a total
Statistics
The end point for survival was defined as revision or loosening in radiographs. Aseptic loosening was considered as a separate end point because “revision for any reason” included nonimplant-related operations. Kaplan-Meier survival data were used to construct the survival probabilities of implants at 5 years.
Clinical Result
The overall clinical result was satisfactory with a mean preoperative Harris hip score at 46.24 points (range, 5-70 points) and a mean postoperative score at 96.5 points (range, 71-100 points) at the most recent examination. There was no pain in 58 hips (58 patients). When the patients with pain were questioned about location, only one (slight pain, no medication taken) stated it was “thigh” pain, and the others stated it was in the “hip” (4) or “buttock” (1).
Before the operation, 4 patients
Discussion
Our study has shown that this prosthesis has satisfactory results in THA in young patients after 5 to 7 years of follow-up. No cups were revised for loosening, nor did they show the radiologic signs of loosening. Stöckl et al [12] had measured the migration of 71 primary THAs with the Duraloc-100 series. He found that 48% of their cups were loose at 24 months. Our study did not support their predication.
The mean rate of liner wear was 0.125 mm/y (00-0.39 mm/y), and pelvic osteolysis was
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Cited by (0)
No benefits or funds were received in support of this study.