Highly cross-linked versus conventional polyethylene inserts in total hip arthroplasty,a five-year Roentgen stereophotogrammetric analysis randomised controlled trial |
| |
Authors: | Justin van Loon Dani l Hoornenborg Inger Sierevelt Kim TM Opdam Gino MMJ Kerkhoffs Dani l Haverkamp |
| |
Affiliation: | Justin van Loon, Daniël Hoornenborg, Inger Sierevelt, Daniël Haverkamp, Department of Orthopaedic Surgery, Xpert Orthopedie Amsterdam/Specialized Center of Orthopedic Research and Education, Amsterdam 1101EA, NetherlandsJustin van Loon, Kim TM Opdam, Gino MMJ Kerkhoffs, Department of Orthopaedic Surgery, Amsterdam University Medical Centres, Location Academic Medical Center, Amsterdam 1105AZ, Netherlands |
| |
Abstract: | BACKGROUND Polyethylene(PE) particles produced by wear of the acetabular insert are thought to cause osteolysis and thereby aseptic loosening of the implant in total hip arthroplasty(THA). As highly cross-linked polyethylene(HXLPE) is presumed to give lower wear rates, in vivo studies are needed to confirm this.AIM To compare the wear of REXPOL, a HXPLE, with conventional PE within the first five years after implantation using Roentgen stereophotogrammetric analysis(RSA).METHODS Patients were randomised to receive either a HXLPE(REXPOL) or a conventional PE insert during primary THA. RSA images were obtained directly postoperative and after 6 wk, 12 wk, 6 mo, 12 mo, 24 mo and five years. Functional outcomes were assessed using the Hip Injury and Osteoarthritis Outcome Score and Harris Hip Score at baseline and five years after surgery.RESULTS The HXLPE(REXPOL) showed less wear in the latero-medial direction. Significant wear rates of conventional PE were seen in the latero-medial and center-proximal direction and in volume and corrected volume, whereas the REXPOL did not show these outcomes over time. Improvement from baseline in functional outcome did not significantly differ.CONCLUSION Total 3 D wear is less in THAs inserted with a REXPOL inlay than a conventional PE inlay after five years. This study confirms, for the first, that the REXPOL HXLPE inlay is preferred to standard PE. |
| |
Keywords: | Highly cross-linked polyethylene Primary total hip arthroplasty Polyethylene wear Roentgen stereophotogrammetric analysis |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《World journal of orthopedics》浏览原始摘要信息 |
|