Effects of joint line changes on biomechanics of patellofemoral joint after total knee arthroplasty
Wang Tao
Abstract：BACKGROUND:In addition to infection, the reasons for total knee arthroplasty revision are polyethylene liner wear and prosthesis loosening. The impact of joint line height on patelofemoral biomechanics was inconclusive. OBJECTIVE: To study the impact of joint line changes after total knee arthroplasty on patelofemoral joint biomechanics. METHODS: Three-dimensional finite element models were established after total knee arthroplasty. The impact of different joint line height on quadriceps tensile force, patela tendon tension, and patelofemoral joint forces was calculated at range of flexion of 0°, 30°, 60° and 90°. RESULTS AND CONCLUSION: (1) At knee flexion of 0°, the height of the joint line in-3 mm-4.5 mm did not have great impacts on quadriceps tensile force, patela tendon tension and patelofemoral joint forces. (2) At knee flexion of 30°-90°, the height of the joint line below 3 mm did not have great impacts on quadriceps tensile force, patela tendon tension and patelofemoral joint forces. The height of the joint line more than 3 mm had obvious impacts on quadriceps tensile force, patela tendon tension and patelofemoral joint forces. (3) It was recommended that the height of joint line in total knee arthroplasty was preferably controled within 3 mm.
Machine-generated Keywords：
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 1845-1851 )