J Korean Orthop Assoc.  2003 Apr;38(2):117-121.

Measurement Methods for Acetabular Cup Wear in Total Hip Replacement Arthroplasty: Accuracy versus ease of use

Affiliations
  • 1Department of Orthopaedic Surgery, Inha University, Inha Hospital, Sungnam, Korea. kangjoon@inha.ac.kr

Abstract

PURPOSE
To compare the accuracy of four wear measurement methods using 17 retrieved polyethylene liners previously used in revision hip arthroplasty. MATERIAL AND METHOD: Direct measurement was done using a point contact micrometer. Three manual measurement methods and Devane's three dimensional computerized method were compared. RESULT: Dorr's method underestimated wear by 26.2% with a mean error of 0.39 mm. Livermore's method estimated wear to within 22.4%, with a mean error of 0.21 mm, Devane's method estimated wear to within 12.1%, with a mean error of 0.14 mm. The new method (with correction factor adjustment by the Dorr method) estimated wear to within 13.4%, with a mean error of 0.17 mm. CONCLUSION: The new method can more accurately estimate average acetabular cup wear.

Keyword

Hip Arthroplasty; Polyethylene Wear; Measurement

MeSH Terms

Acetabulum*
Arthroplasty*
Arthroplasty, Replacement, Hip*
Hip
Polyethylene
Polyethylene
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