Cartilage Function IHMC Public Cmaps

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					Cartilage Function
• Resilient and elastic support
  –   Mineralization
  –   Attachment
  –   Compression
  –   Shear
  –   Tension

• Lubrication of articular surfaces
  (lubricin)
 How Cartilage Functions
• Resist loads/deformations
     • Swelling
        – large PGs / turgor pressure (holds water)
        – Papain experiment in rabbits digests PGs
     • Collagen network resists swelling

Cartilage is a preloaded structure:
 Balancing act between the internal
 swelling pressure of the PG gel and
 the tensile restraints of collagen
 network.
Cartilage is a preloaded structure
Preloaded engineering structure
Cartilage Creep—Static Load




                         In: Basic
                         Biomechanic
                         s of the
                         Skeletal
                         System
                         Frankel and
                         Nordin,
                         1980, Lea &
                         Febiger
Viscoelastic Behaviour—Cyclic Load

				
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posted:8/20/2011
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