Accuracy of templating the acetabular cup size using digital films
Abstract
Purpose To determine the reliability and accuracy of templating the acetabular cup, using digital Xray films in patients undergoing total hip replacement. Methods Patients undergoing total hip replacement were subjected to preoperative pelvic digital xrays. A 3 cm spherical ball was placed over the greater trochanter as a digital marker to gauge the magnification of the digital film. The acetate template provided by the implant companies was superimposed over the digitally magnified X-ray films on the computer screen and size of the cup( Y) determined. The size of the spherical ball on the same digital films was also measured (X) mm using the scale provided on the acetate templates. The actual size of the acetabular cup to be used was determined using the formula 30YX. Results The templating of 40 acetabular cups were done by 2 independent observers on two occasions. There was good intraobserver and interoberserver reliability with intraclass correlation coefficient values greater than 0.8. Using this technique of templating, the actual size of the acetabular cup was predicted to the same size in 75 of cases to within 1 size in 97, and to within 2 sizes in 100.Conclusion It is possible to accurately and reliably predict the size of the acetabular cup,
using acetate templates on digital films, using the technique described.
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James V Bono. Digital templating in total hip arthroplasty. Journal of bone and joint surgery. 2004;Volume 86- A Supplement 2:118-122.
Alejandro González Della Valle, Douglas E. Padgett, Eduardo A. Salvati. Preoperative Planning for Primary Total Hip Arthroplasty. Journal of the American Academy of Orthopaedics Surgeons. November 2005; Volume 13,Number 7: 455-462.
Patrick Gamble, Justin de Beer, Danielle Petruccelli, Mitchell Winemaker. The Accuracy Of Digital Templating in Uncemented Total Hip Arthroplasty. The Journal of Arthroplasty2009; Vol. 00 No 0: 1-4
Michael Olsen, Patrick Gamble, Mark Chiu, Nezar Tumia, Richard A. Boyle, Emil H. Schemitsch. Assessment of Accuracy and Reliability in Preoperative Templating for Hip Resurfacing Arthroplasty. The Journal of Arthroplasty 2010; Vol. 25No. 3: 445-449.
Monika Michalíková, Lucia Bednaríková, Martin Petrík,Jozef Živák1, Richard Raši. The Digital Pre-Operative Planning of Total Hip Arthroplasty. Acta Polytechnica Hungarica 2010;Vol. 7 No. 3: 137-152.
Aasis Unnanuntana, Dominic Wagner, Stuart B. Goodman. The Accuracy of Preoperative Templating in Cementless Total Hip Arthroplasty. The Journal of Arthroplasty 2009;Vol. 24 No. 2: 180-186.
Eggli.S, Pisan.M, Muller.M.E. The value of preoperative planning for total hip arthroplasty. J Bone Joint Surg [Br] 1998;80-B:382-90.
Larry W. Carter,Don O. Stovall, Timothy R. Young. Determination of Accuracy of Preoperative Templating of Noncemented Femoral
Prostheses. The Journal of Arthroplasty 1995; vol10: 4:1-7
Lakshmana jeyaseelan, jonathan ward, kyriacos eleftheriou,J.cobb. Digital templating in total hip arthroplasty in the NHS: Computer says no…., European Journal of Orthopaedic Surgery & Traumatology August 2011; Volume 21: 6:397-399
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