Hip Replacement Surgery - Types of Implants
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Combination of cemented femur part and uncemented acetabular part.
Uncemented parts rely on a process called biologic fixation, which holds them in place. This means that the parts are made with a porous surface that allows your own bone to grow into the pores and hold the new parts in place. These replacements are more frequently used for younger, more active people.
The primary disadvantage of an uncemented prosthesis is the extended recovery period. Because it takes a long time for the natural bone to grow and attach to the prosthesis, a person with uncemented replacements must limit activities for up to 3 months to protect the hip joint. Also, it is more common for someone with an uncemented prosthesis to experience thigh pain in the months following the surgery, while the bone is growing into the prosthesis.
Cemented parts are fastened to existing, healthy bone with a special glue or cement. Hip replacement using these parts is referred to as a "cemented" procedure. These replacements are more frequently used for older, less active people and people with weak bones, such as those who have osteoporosis.
Source: National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, U.S. Department of Health and Human Services. www.niams.nih.gov
Hip Replacement Surgery: Types of Implants