Efficacy of conventional method of preoperative templating in implant size selection in patent undergoing total hip arthroplasty

Preoperative templating in total hip arthroplasty is useful in providing details to restore the normal biomechanics and also reduce the guess work. This study was done to asses the efficacy of traditional templating method in the modern times for implant size selection in patient undergoing total hip arthroplasty. We evaluated the accuracy of preoperative templating in 60 primary total hip arthroplasty. Exact size was predicted of 36.6 % acetabulum and 58.3% femoral component. Accuracy was increased to 88.8 % for acetabulum and 90% when one size variation was taken into account. Accuracy of size prediction was better for cemented as compared to uncemented implants. Cemented acetabulum was predicted 54.5% as compared to 26.6% for uncemented implants. Cemented femoral component was predicted in 77.3% vs 47.4% for uncemented femoral stem.