What is a surface prosthesis?

A surface prosthesis is an alternative procedure to a total hip or total knee replacement, which is more suitable for patients under 65. Surface prostheses preserve a larger amount of the bone and usually last longer than their conventional alternative.

The surface prosthesis refers to an artificial replacement of a portion of the bone's surface. This is usually used when only part of the bone is required to be replaced, rather than the entire bone, and is performed by a specialist orthopaedic surgeon. 

When is a surface prosthesis recommended?

A surface prosthesis procedure may be recommended by the orthopaedic specialist in cases where only a section of the joint, such as the knee or hip joint needs to be replaced. This type of prosthesis is designed to cover only the damaged or diseased part of the bone, preserving as much of the healthy bone as possible.

Surface prostheses are also commonly used in joint preservation procedures, to help relieve pain caused by damaged or diseased bone, and return normal function. 

The decision to use a surface prosthesis is based on a number of factors, and will be discussed with the orthopaedic surgeon. These factors include the location and extent of the bone damage, the overall health of the patient, and their lifestyle and activity level.

What is a surface prosthesis made from?

Surface prostheses can be made from various materials. These include metal, ceramic, or a combination of materials. Modern technologies can allow for specifically shaped pieces to be made to fit using 3D printing technology.

What are the risks of a surface prosthesis?

As with all surgical procedures, having a surface prosthesis fitted comes with the risks of surgery including infection, bleeding, and blood clots.

Risks specific to surface prostheses include the risk of the implant loosening over time, wear and tear of the prosthesis from general activity, stiffness or loss of a range of movement, and failure of fixation of the prosthesis.