25. Principles of endoprothesis replacement (arthroplasty) surgery

Question 1

What is an endoprosthesis?

Answer 1

A prosthesis entirely in the body

Question 2

What is a hemiarthroplasty?

Answer 2

Replaces half the joint IE:

Question 3

What is a arthroplasty?

Answer 3

Replaces BOTH halfs of the joint IE:

Question 4

How can the artificial materials be fused with bone?

Answer 4

Cement (higher risk of death, holds better) OR
Porus implant to allow the bone to grow in

Question 5

How can you access the hip joint for arthroplasty?

Answer 5

The posterior (Moore) approach:
Accesses the joint through the back, taking piriformis muscle and the short external rotators off the femur. This approach gives excellent access to the acetabulum and preserves the hip abductors.
The lateral approach:
requires elevation of the hip abductors (gluteus medius and gluteus minimus) in order to access the joint.