Topic
Basic Science
Updated
FRICTION
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WEAR
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POLYETHYLENE
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LUBRICATION
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CORROSION
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What is friction?
What is roughness?
‼️ What is coefficient of friction?
How does the native joint achieve a low frictional coefficient?
What are the 4 modes of wear?
What are the 3 mechanisms of wear?
How do you measure wear?
What is RadioStereometric Analysis (RSA)?
Picture of broken implant/ cement mantle. Explain why this fails?
What is a stress riser?
How do we balance the size of the interlocking screw or lag screw?
What is the difference between aseptic loosening vs osteolysis?
What is the pathogenesis of Osteolysis? What is effective joint space?
What size must PE particles be to incite osteolysis?
How to reduce wear practically in Arthroplasty?
How does cup positioning affect lubrication and wear?
How to reduce effective joint space?
What is “particle disease”?
What is polyethylene?
What is the name of the process by which PE is made?
1. How is PE manufactured?
Why are other forms of manufacturing not as good?
2. How is PE Sterilized?
What happens when PE is irradiated?
3. How is Cross linking done?
How To prevent free radical oxidation? 3 ways
1st gen vs 2nd gen XLPE?
4. Packaging
What are the 2 states of UHMWPE?
What are the clinical properties of XLPE vs normal PE?
What is the minimal PE thickness in THR?
Why not use XLPE in TKR?
What increases risk of catastrophic PE failure in TKR?
What determines the surface roughness?
What is lambda ratio? What does it determine?
Why not have a Lambda ratio of 10? As high as possible?
‼️ Types of lubrication?
Lubrication in native joint in reference to Gait?
What is the most predominant lubrication in native joints?
What is the predominant lubrication in Prosthetic joints? How about MOM? or COC?
⚠️ What is wettability?
What is corrosion?
What are the types of corrosion?