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Unformatted text preview: icial joints?
• If injection of hyaluronic acid helps the
patient with osteoarthritis would it help
the total joint replacement patient? Page 10 Image removed due to copyright restrictions.
Diagram explaining coefficient of friction in artifical ball/socket joint.
Example Coefficients of Friction
Cartilage - Cartilage: 0.002 - 0.004
Metal - Metal (dry): 0.4
Metal - Metal (saline): 0.15-0.35
Metal - UHMWPE (serum): 0.05-0.15 Cartilage
Image removed due to copyright
restrictions. Cartilage-lined knee joint. Bone Figure by MIT OCW. Mechanism of lubrication? Page 11 Several Mechanisms of Lubrication in the Joint
• Boundary layer lubrication at the surface.
• Fluid-film (hydrodynamic) lubrication in regions where surfaces
are separated - also elastohydrodynamic and weeping lubrication. Articular
Surface Boundary Layer Lubrication of Articular Cartilage
• The load is supported by a monolayer of the lubricating molecules
adsorbed to the surface of the cartilage. Page 12 LUBRICATION OF NATURAL AND
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This note was uploaded on 11/11/2011 for the course BIO 2.797j taught by Professor Matthewlang during the Fall '06 term at MIT.
- Fall '06