What is Hip Prosthesis and where is it used?
If your hip has been damaged by a fracture or other conditions, it might be complex for you to do things that require movement of your hips. Sometimes, you are left with no other option but hip replacement orthopedic surgery.
Hip replacement is a safe surgery that can help you relieve your pain and you can move actively, again. A hip prosthesis is a medical device that replaces a broken hip joint. It consists of a curved femoral head inserted into a hollow shaped acetabulum within the pelvis and is protected by a synovial joint capsule. It is a major orthopedic device that has provided hip replacement surgery with a top place in successful operation.
In a hip replacement, the fractured bone and cartilage are separated and replaced with prosthetic devices. Following steps are performed in order, for the replacement surgery:
- The fractured femoral head is separated and replaced with a metal stem that is positioned into the empty center of the femur.
- The femoral stem may be either cemented or press-fit into the bone.
- A metal or ceramic ball is located on the upper part of the stem.
- This ball replaces the fractured femoral head that was separated.
- The injured cartilage surface of the socket (acetabulum) is disconnected and replaced with a metal socket.
- Screws or cement are sometimes used to hold the socket in place.
- A plastic, ceramic, or metal spacer is inserted between the new ball and the socket to allow for an even gliding surface.
Components used in hip prosthesis:
- The Femoral component contains a stem/pin and head.
- Acetabular cup
- Acetabular interface.
The femoral component is an inflexible metal pin made with:
- Cobalt chrome or
- Titanium alloy
Stainless steel was used earlier with ceramic polished head. A metallic or ceramic acetabular cup is placed in the hip socket and is fixed with the ilium bone. Adhesive bone cement is used generally to fix the pin & cup with the bone structure. The hip prosthesis component comes in different varieties such as:
- Ceramic on Ceramic
- Metal on Metal
- Metal on Polypropylene
The metal on metal hip prosthesis is used mostly.
The materials and components used for the pin require:
Things to keep in mind while designing are:
- Tissue tolerance
- Wear resistance
- Mechanical behavior
Benefits of Hip Prosthesis:
- Relieves pain
- Higher success rate
- Long-lasting effect
- Improves mobility
Keeping in mind the benefits and success rate of the hip prosthesis in orthopedic surgery, this component is recommended to use if you are opting for a hip replacement surgery. We, at Zealmax Ortho, are aiming towards providing the best quality implants while noting down the quality requirements.