The Accuracy of Digital Templating in Uncemented Total Hip Arthroplasty

Patrick Gamble, MD,* Justin de Beer, MD, FRCSC, †‡ Danielle Petruccelli, MLIS, ‡ and Mitchell Winemaker, MD, FRCSC†‡

* Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
† McMaster University, Hamilton, Ontario, Canada
‡ Hamilton Arthroplasty Group, Hamilton Health Sciences Henderson Hospital, Hamilton, Ontario, Canada

The Journal of Arthroplasty Vol. 25 No. 4 2010

Abstract: We analyzed the reproducibility and reliability of computer templating in primary uncemented total hip arthroplasties as compared to standard onlay templating techniques with hardcopy radiographs from a digital source. Digital templating showed good intraobserver and interoberserver reliability with intraclass correlation coefficient values greater than 0.7. Using computer templating, prediction of sizing to within 1 size was 85% accurate for femoral stem sizing and 80% accurate for acetabular sizing. Using onlay templating, prediction of sizing to within 1 size was 85% accurate for femoral sizing and 60% accurate for acetabular sizing. We conclude that the introduction of digital templating has significant benefits in preoperative planning for total hip arthroplasty over onlay templating.