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 prosthesis/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
§ Corrosion
§ Wear
resistance
§ Mechanical
behavior
§ Cost-effective
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 orthopedic implants while noting down
the quality requirements.
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