Article
Comparison Of Surgical Outcomes Between Standard And Elevated-Rim Highly Cross-Linked Polyethylene Acetabular Liners In Primary Total Hip Arthroplasty With Minimum 15-Year Follow-Up
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Authors
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Nam Hoon Moon
- Pusan National University, Busan, South Korea
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Won Chul Shin
- Pusan National University Yangsan Hospital, Medical School of Pusan National University, Busan, South Korea
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Sang Min Lee
- Pusan National University Yangsan Hospital, Medical School of Pusan National University, Busan, South Korea
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Seung Min Son
- Pusan National University Yangsan Hospital, Medical School of Pusan National University, Busan, South Korea
| Published: | October 26, 2021 |
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Outline
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Objectives: The main goals of the present study were to (1) conduct the longest-to-date follow-up wear analysis of the HXLPE acetabular liner, (2) assess the incidence of femoral and acetabular osteolysis, and (3) compare the surgical outcomes between standard and elevated-rim liners in primary THA. We hypothesized that HXLPE acetabular liner would show excellent longevity and decreased wear, and that elevated-rim liners would show increased wear compared with standard liner.
Methods: In this retrospective cohort study, we evaluated 112 primary THAs performed by a single experienced arthroplasty surgeon at our institution between March 2000 and December 2003. Patients were classified based on the type of acetabular liner used: standard or elevated-rim liner. For evaluation of surgical outcomes, the following data were collected: acetabular cup position (anteversion and inclination), wear rate (linear and volumetric), presence of osteolysis, history of reoperation (all cause and wear related), complications (deep joint infection, dislocation, and periprosthetic fracture), Palmer and Parker mobility score at last follow-up, and Harris hip score at last follow-up.
Results and Conclusion: Linear and volumetric wear rates were 0.028 mm/year (0.000-0.145 mm/year) and 11.641 mm3/year (0.000 - 70.000 mm3/year) in the standard group and 0.026 mm/year (0.000 - 0.094mm/year) and 9.706 mm3/year (0.000 - 33.000 mm3/year) in the elevated-rim group, respectively. These rates were not significantly different between groups. One case of osteolysis was confirmed in the standard group, whereas no osteolysis was observed in the elevated-rim group.
Our study demonstrated that HXLPE acetabular liners had good long-term results with more than 15-year follow-up. In addition, no significant differences in surgical outcomes regarding osteolysis or wear-related issues were identified between standard and elevated-rim liner. Based on these results, we suggest that the HXLPE acetabular liner with elevated-rim might be a good implant option that can be used safely in primary THA.
