Can tibial coverage in total knee replacement be reliably evaluated with three-dimensional image-based digital templating?. Issue 1 (January 2013)

• Record Type: Journal Article
• Authors: Costa, A. J.; Lustig, S.; Scholes, C. J.; Balestro, J-C.; Fatima, M.; Parker, D. A.
• Is Part Of: Bone & joint research. Volume 2:Issue 1(2013)
• Page Start: 1
• Page End: 8
• Publication Date: 2013-01
• Subjects: Knee -- Digital templating -- Reliability -- Tibial coverage -- Arthroplasty -- Baseplate; Musculoskeletal system -- Periodicals; 573.705
• DOI: 10.1302/2046-3758.21.2000130
• Languages: English
• ISSNs: 2046-3758

Abstract

Abstract : Objectives: There remains a lack of data on the reliability of methods to estimate tibial coverage achieved during total knee replacement. In order to address this gap, the intra- and interobserver reliability of a three-dimensional (3D) digital templating method was assessed with one symmetric and one asymmetric prosthesis design. Methods: A total of 120 template procedures were performed according to specific rotational and over-hang criteria by three observers at time zero and again two weeks later. Total and sub-region coverage were calculated and the reliability of the templating and measurement method was evaluated. Results: Excellent intra- and interobserver reliability was observed for total coverage, when minimal component overhang (intraclass correlation coefficient (ICC) = 0.87) or no component overhang (ICC = 0.92) was permitted, regardless of rotational restrictions. Conclusions: Measurement of tibial coverage can be reliable using the templating method described even if the rotational axis selected still has a minor influence.