Surface stress: a factor influencing ultra high molecular weight polyethylene durability in mobile-bearing knee design.
The continuing global interest in the use of total and unicompartmental mobile-bearing knee designs is manifest by an appreciation of their clinical performance. Like their fixed plateau counterparts, mobile-bearing knees are influenced by patient and surgical variables as well as design, material, and manufacturing choices. This article is a focused description of tibiofemoral surface stress distributions, as a predictor of in vivo material durability for three contemporary designs at positions encountered during daily activity.
Morra
Edward A
EA
Orthopedic Research Laboratories, Lutheran Hospital, a Cleveland Clinic hospital, Cleveland, Ohio, USA.
Heim
Christine S
CS
Greenwald
A Seth
AS
D019645:Arthroplasty, Replacement, Knee; D019544:Equipment Failure Analysis; D020342:Finite Element Analysis; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D007720:Knee Prosthesis; D011095:Polyethylenes; D011474:Prosthesis Design; D016059:Range of Motion, Articular; D013314:Stress, Mechanical; D013499:Surface Properties; D016138:Walking / Q000502:physiology; D016474:Weight-Bearing / Q000502:physiology*
D011095:Polyethylenes; C111601:ultra-high molecular weight polyethylene