The physiological basis for a flexible condylar tibial plateau design.
Knee resurfacing is a successful treatment for osteo- and rheumatoid arthritis in elderly patients. The application of this treatment to younger more active and obese persons has the potential to produce premature wear, loosening, and undesirable bone remodelling. A new generation of more physiologically compatible components is required for these situations. This paper discusses the design and analysis of a prototype tibial base plate aimed at physiological load transfer. Incorporated in the design are mechanisms to alleviate lift-off phenomena, bone stress concentrations, stress shielding, and micromotion at the bone-implant interface. The design requires viable cancellous bone stock, so that the bone may respond by remodelling to the dynamic loading during normal ambulatory activities.
Wevers
H W
HW
Department of Mechanical Engineering, Queen's University, Kingston, Ontario, Canada.
Dujovne
A R
AR
Guzzwell
J A
JA
Cooke
T D
TD
D000497:Alloys; D001672:Biocompatible Materials; D001696:Biomechanical Phenomena; D001860:Bone Plates; D002858:Chromium Alloys; D003187:Compliance; D006801:Humans; D066298:In Vitro Techniques; D007719:Knee Joint / Q000502:physiology*; D011474:Prosthesis Design; D013314:Stress, Mechanical; D013977:Tibia / Q000601:surgery*; D014025:Titanium
D000497:Alloys; D001672:Biocompatible Materials; D002858:Chromium Alloys; C031462:titanium alloy (TiAl6V4); D014025:Titanium