Total Joint Replacement Flashcards
What are the top two indications of hip replacement
- Primary Osteoporosis
2. Hip fracture
Label this picture
- Synovial Membrane
- Synovial fluid
- Articular cartilage
- Ligament and joint Capsule
What are the two types of hip replacement?
Hip resurfacing and Total Hip Replacement
Advantages of Hip resurfacing
- Femoral neck and medullary canal are preserved
- Reduced risk of dislocation
- Recovery of natural gait
Risks of hip resurfacing
- Femoral neck can be damaged
- Longer surgery
- Increased surgical skill required
What are the four components used in modern total hip replacement?
- Femoral stem
- Femoral Head
- Insert
- Acetabular cup
Materials used in the ball for THR
CoCr Alloy
Alumina
Zirconia
Materials used for femoral stem in THR
CoCr Alloy
Titanium Alloy
Materials used in the cup in THR
CoCr Alloy
Alumina
UHMWPE
What materials would be used as a coating in THR
CoCr Alloy
Ti alloy
Pure Ti
Calcium HA
What finish would require a cemented femoral stem?
Polished or matte
What finish requires only a press fit femoral stem
Porous
Pros and Cons of cemented stem?
Pro:
Reduced recovery
Immediate stability
Con:
Loose cement causes failure
Cement wear can accelerate failure
More difficult revision
Pros and Cons of uncemented stem?
Pro: No cement wear No residual monomer No exothermic reaction Easier revision
Con:
Delayed stability
Why are knee replacements generally required?
Arthritis
Injury
Infection
