The Accuracy and Reliability of Preoperative Templating for Metal-on-Metal Hip Resurfacing

Abstract The purposes of this study were to evaluate the accuracy and reliability of preoperative templating on conventional radiographs (CRs) for metal-on-metal hip resurfacing and to determine the factors affecting the accuracy. Four observers templated 80 CRs on 2 separate occasions in a blinded...

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Bibliographic Details
Published in:The Journal of arthroplasty 2011-08, Vol.26 (5), p.765-770
Main Authors: Choi, Jung Keun, MD, Geller, Jeffrey A., MD, Wang, Wenbao, MD, Nyce, Jonathan D., BS, Macaulay, William, MD
Format: Article
Language:English
Subjects:
Acetabulum - diagnostic imaging
Acetabulum - surgery
Adult
Aged
Arthroplasty, Replacement, Hip - methods
conventional radiographs
Female
Femur - diagnostic imaging
Femur - surgery
Hip Joint - diagnostic imaging
Hip Joint - surgery
Hip Prosthesis
Humans
Male
metal-on-metal hip resurfacing
Metals
Middle Aged
Observer Variation
Orthopedics
Osteoarthritis, Hip - surgery
preoperative
Preoperative Period
Prosthesis Design - methods
Prosthesis Fitting - methods
Radiography
Regression Analysis
Reproducibility of Results
Retrospective Studies
templating
Treatment Outcome
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Summary:Abstract The purposes of this study were to evaluate the accuracy and reliability of preoperative templating on conventional radiographs (CRs) for metal-on-metal hip resurfacing and to determine the factors affecting the accuracy. Four observers templated 80 CRs on 2 separate occasions in a blinded fashion. Eight independent variables were evaluated to investigate their effect on the accuracy of templating. The overall accuracy of templating within one size of the actual component was 80.6% for the femoral component and 98.5% for the acetabular component. Overall, the intraobserver and interobserver reliability was fair to substantial ( κ = 0.22-0.61). Using multiple regression analysis, surgical time was the only factor that affected the accuracy of predicting the size of the acetabular component ( P = .019). We conclude that CR templating for metal-on-metal hip resurfacing is a useful method for preoperative planning of the sizes of the respective implants and that surgeon experience does play a significant role in the accuracy of predicting component size during templating.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2010.07.024