Published online Oct 18, 2013. doi: 10.5312/wjo.v4.i4.287
Revised: July 3, 2013
Accepted: July 12, 2013
Published online: October 18, 2013
AIM: To investigate the correlation between preoperative measurement in total knee arthroplasty and the prosthetic size implanted.
METHODS: A prospective double-blind study of 50 arthroplasties was performed. Firstly, the reliability and correspondence between the size of said measurement and the actual implant utilized was determined. Secondly, the existing correlation between the intra- and interobserver determinations with the intraclass correlation coefficient was analyzed.
RESULTS: An overall correspondence of 54%, improving up to 92% when the measured size admitted a difference of one size, was found. Good intra- and interobserver reliability with an intraclass correlation coefficient greater than 0.90 (P < 0.001) was also discovered.
CONCLUSION: Agreement between the preoperative measurement with standardized acetate templates and the prosthetic size implanted can be considered satisfactory. We thus conclude it is a reproducible technique.
Core tip: Choosing the correct size in total knee arthroplasty is one of the factors known to the good evolution of this procedure. Preoperative evaluation using templates is a recommended step in achieving this goal. There are controversies in the literature on the correlation between this measurement and the size of the prosthesis finally implanted.