1. Artificial Hip Replacement
John Donahoe

2. What is it?
Hip Replacement Surgery is the most common orthopedic procedure today
Orthopedics
The branch of medicine that deals with the prevention or correction of injuries or disorders of the skeletal system and associated muscles, joints and ligaments.

3. Components Acetabular Cup Articular Interface Femoral Component
Hemiarthroplasty
Femoral Head
Total Hip Arthroplasty

4. Reasons for Arthroplasty
Osteoarthritis, rheumatoid arthritis, avascular necrosis, traumatic arthritis, hip fractures, bone tumors (benign and malignant).

5. Materials 4 Common types Metal-Metal -Ceramic-Plastic Ceramic-Ceramic
Metal-Plastic (longest used)
-Ceramic-Plastic
Ceramic-Ceramic

6. Materials (Cont.) Plastic Metal Polyethylene
UHMWPE (Ultra High Molecular Weight PolyEthylene)
Metal
cobalt chromium alloy, titanium alloy, sometimes stainless steel

7. Positives & Negatives Ceramic Metal Plastic
Strong, non-corrosive, agrees with body (Vitamin E)
Most expensive, can be squeaky and sometimes breakable
Metal
Large ball head; provides greater range of motion and lower chance of dislocation, least pricey
High chance of corrosion
Plastic
More expensive than metal, less than ceramic, durable
Semi-corrosive, body does not agree with plastic corrosion

8. Approaches Posterior Lateral Antero-lateral Minimally Invasive
Smaller incisions, less scarring, limits vision, may require special x-ray equipment

9. Results and Complications
Roughly 120,000 annual hip replacements in the U.S.
Incidence rate is about 1 in 2,266 operations or ~0.04%
Most adverse effects stem from metal corrosion (about 0.01 mm per year)

10. Health Risks Infection Blood Clots Leg-Length Inequality Dislocation
Corrosion
Metallosis (Metal)
Osteolysis (Plastic or Metal)
Pseudotumors
Necrosis

12. Recalls DePuy ASR XL DePuy ASR hip resurfacing system
Stryker Rejuvenate
Stryker ABGII
Smith and Nephew R3
Acetabular System

13. Moving Forward Alternate Materials Ivory Carbon Fiber?
Dr. San Baw (300 procedures from , 88% success, all ages 24-87, physical activity)
Carbon Fiber?
Ceramic development

14. Sources http://bonesmart.org/hip/hip-replacement-implant-materials/