The Journal of Hip Surgery 2019; 03(02): 059-061
DOI: 10.1055/s-0039-1678746
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Assessment of an Orthopaedic Templating Software Package for Cemented Total Hip Arthroplasty

Michael Newman
1   Department of Trauma and Orthopaedic, Queen Alexandra Hospital, Portsmouth, United Kingdom of Great Britain and Northern Ireland
,
Grant Shaw
1   Department of Trauma and Orthopaedic, Queen Alexandra Hospital, Portsmouth, United Kingdom of Great Britain and Northern Ireland
,
Timothy Kane
1   Department of Trauma and Orthopaedic, Queen Alexandra Hospital, Portsmouth, United Kingdom of Great Britain and Northern Ireland
› Author Affiliations
Further Information

Publication History

12 August 2018

13 November 2018

Publication Date:
15 February 2019 (online)

Abstract

The main aim of this article was to assess a large, multisurgeon dataset of cemented total hip arthroplasties that had been templated using software. This assessment compared preoperative templated predictions with what was implanted with regard to (1) femoral prosthesis size, (2) offset, and (3) acetabular cup size. A database of total hip arthroplasties performed by four surgeons between the dates November 7, 2014 and October 31, 2017 was interrogated. The data was refined so that only primary cemented collarless polished tapered stem hip arthroplasties, fully templated on a correctly calibrated pelvic radiograph, were included. This provided 354 cases. The predicted software template was compared with actual implanted component sizes. With regard to the femoral stem, the software was exactly correct in 70.9% and accurate to within one size in 96.89% of cases. With regard to the femoral offset, the software was exactly correct in 87.01% and accurate to within one size in 99.72% of cases. With regard to the acetabular cup size, the software was exactly correct in 61.3% and accurate to within +/− 2 mm in 87.29% of cases. Templating software offers an accurate prediction of the femoral prosthesis size and offset, as well as acetabular cup size. Preoperative insight into likely component sizes and offset provides the operating surgeon with many benefits; templating the pelvic radiograph is a method of cognitive rehearsal, provides insight into potentially challenging aspects of the upcoming surgery, may highlight intraoperative issues where there is a large intraoperative deviation from what is templated, and enables efficient stock keeping for the healthcare institution.