The main difference between total hip replacement (THR) and partial hip replacement (PHR) lies in the extent of the joint replacement and the components used:
Total Hip Replacement (THR):
- Scope: Involves replacing both the femoral head (the ball) and the acetabulum (the socket) of the hip joint.
- Components: Consists of a metal stem inserted into the femur with a metal or ceramic ball attached to the end, and a cup component inserted into the acetabulum, typically made of metal, ceramic, or plastic.
- Indications: Recommended for patients with severe hip arthritis, avascular necrosis, hip fractures, or other conditions affecting the entire hip joint.
Partial Hip Replacement (PHR):
- Scope: Involves replacing only the femoral head (the ball) of the hip joint, leaving the acetabulum (the socket) intact.
- Components: Consists of a metal stem inserted into the femur with a metal or ceramic ball attached to the end, similar to the femoral component of a THR.
- Indications: Suitable for patients with fractures of the femoral head, or other conditions where only the ball portion of the hip joint is damaged, and the acetabulum remains healthy.
The choice between total and partial hip replacement depends on factors such as the extent of damage to the hip joint, the patient’s age, activity level, and overall health. An orthopedic surgeon will evaluate these factors and recommend the most appropriate procedure for the individual patient.