scholarly journals Three Dimensional CT-based Virtual Patellar Resection in Female Patients Undergoing Total Knee Replacement: A Comparison between Tendon and Subchondral Method

2012 ◽  
Vol 4 (3) ◽  
pp. 193 ◽  
Author(s):  
Do Young Park ◽  
Hyung-Min Ji ◽  
Kyu-Sung Kwak ◽  
Surej Gopinathan Nair ◽  
Ye-Yeon Won
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Three Dimensional ◽  
Female Patients ◽  
Total Knee

Simulation of Surface Fatigue Crack Propagation in UHMWPE Tibial Components for Total Knee Replacement

1999 ◽  
Author(s):  
Jaime A. Estupiñán ◽  
Donald L. Bartel ◽  
Timothy M. Wright
Keyword(s):  
Fatigue Crack ◽  
Total Knee Replacement ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Knee Replacement ◽  
Three Dimensional ◽  
Surface Fatigue ◽  
Realistic Description ◽  
Total Knee ◽  
Surface Fatigue Crack

Abstract A simulation of surface fatigue damage to ultra-high molecular weight polyethylene (UHMWPE) components in total knee replacement is presented. Results of simulations of surface fatigue crack propagation were consistent with observed clinical damage. Extensions of these analyses to incorporate a more realistic description of the constitutive and fracture behavior of UHMWPE and three dimensional geometry are discussed.

Bearing Surface Design in Total Knee Replacement

1988 ◽  
Vol 17 (4) ◽  
pp. 149-156 ◽  
Author(s):  
Peter S Walker
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Three Dimensional ◽  
Knee Motion ◽  
Surface Design ◽  
Normal Knee ◽  
Contact Points ◽  
Total Knee ◽  
Fixed Axis ◽  
Mathematical Equations

Surfaces for condylar total knee replacement are designed using computergraphics techniques. An average anatomical femoral surface is represented mathematically. Mathematical equations are written to describe normal knee motion and normal laxity. Tibial surfaces are generated by placing the femur stepwise in multiple sequential positions, through a defined three-dimensional motion or laxity path. In addition, a flat tibial surface is defined, to represent the least amount of femoral-tibial conformity in currently-used knee replacements. Elasticity theory is used to calculate the maximum contact stresses at the femoral-tibial contact points. The least stresses are produced with a fixed axis cylindrical motion, while the highest are with a flat tibial surface. A surface based on laxity produces lower stresses than for normal knee motion, and is thought to be acceptable in terms of both freedom of motion and stability. Such a laxity surface is proposed as being suitable for total knee design.

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