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J Bone Joint Surg Am. 2013 Jun 19;95(12):1088-93. doi: 10.2106/JBJS.L.01211.

Polyethylene wear and osteolysis after cementless total hip arthroplasty with alumina-on-highly cross-linked polyethylene bearings in patients younger than thirty years of age.

Author information

  • 1The Joint Replacement Center, Ewha Womans University MokDong Hospital, Seoul, Republic of Korea. younghookim@ewha.ac.kr

Abstract

BACKGROUND:

We asked whether cementless total hip arthroplasties that made use of alumina-on-highly cross-linked polyethylene bearings would improve hip score and functional activity and reduce the prevalence of polyethylene wear, osteolysis, and aseptic loosening.

METHODS:

Consecutive primary total hip arthroplasties were performed in fifty patients (a total of sixty hips among thirty-four men and sixteen women) who were younger than thirty years of age. The average age at the time of the index arthroplasty was 28.3 years (range, twenty-one to twenty-nine years). The average follow-up was 10.8 years (range, ten to twelve years). Osteolysis and polyethylene wear rates were evaluated with use of radiography and computed tomography.

RESULTS:

The mean Harris hip score, which was 38 points (range, 6 to 45 points) preoperatively, had improved to 95 points (range, 85 to 100 points) at a mean follow-up time of 10.8 years. The mean penetration (and standard error of the mean) of the polyethylene liner was 0.031 ± 0.004 mm per year. No hip had osteolysis or aseptic loosening.

CONCLUSIONS:

At a minimum of ten years and an average of 10.8 years postoperatively, the current generation of cementless acetabular and femoral components with alumina-on-highly cross-linked polyethylene bearings was functioning well and was not associated with the development of osteolysis in our group of patients younger than thirty years of age. While the long-term prevalence of polyethylene wear and osteolysis remains unknown, the midterm data are promising.

PMID:
23783205
[PubMed - indexed for MEDLINE]
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