Variabilidad interobservador en las mediciones de radiografías de prótesis totales de rodilla

measurements of knee prosthesis performed on simple X-rays are similar when taken by different observers with a degree of reproducibility of good to very good. Therefore, these measurements can be used with the aim of unifying the results of work carried out by different researchers. Moreover, they are performed on plain knee X-rays taken during ordinary knee studies and can therefore be obtained by most health centres, which is not the case for CAT scans or MRIs. The Knee Society considers the radiolucent lines as standards for assessment of total knee replacement prostheses, but as other studies have demonstrated that they are not reproducible they have not been considered in this study.