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Infection of the hip prosthesis may require removal of the prosthesis and antibiotic treatment.

Definition and Examples of Prosthesis - The Complete List

A newer development in recent years has been the movement towards implants that have interchangeable, modular parts rather than a single piece design that comes in several sizes. Some modular designs allow different sized components for the femoral stem, the femoral neck, and the femoral head (ball) in order to achieve hundreds or even thousands of different combinations to try to achieve the best reconstruction possible. In this way, the surgeon can increase the offset without making the leg longer, change the angle that the device sits within the socket (anteversion or retroversion), or reconstruct a difficult and distorted joint such as a dysplastic hip. Smaller incisions can also often be used as the prosthesis is assembled in place, somewhat like a ship in a bottle.

The longevity of a prosthetic hip (how long it will last) varies from patient to patient.

List of knee joint technologies based on the literature review.

Fracture of the femur including the greater trochanter can occur during insertion of the prosthesis. This problem is usually treated with fixation with cables and/or wires. Intra operative fractures range between 0.1-1.0% with cemented total hip replacements and is increased when using a cementless prosthesis (3-29%).

The principal disadvantage of metal on plastic is that the metal head wears away the plastic liner over time. Small particles of plastic accumulate within the joint, and the white blood cells in the body try to swallow and dissolve these particles. However, when the white blood cells are unsuccessful at digesting these artificial particles, the white blood cells may burst, releasing the chemicals (enzymes) used to dissolve foreign bodies and bacteria into the bone around the prosthesis. Over time, this causes large cysts to form and areas of loosening occur around the prosthesis, called osteolysis, that frequently leads to a revision surgery at some point as the hip replacement becomes loose.


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Total Hip Replacement (THR) procedure replaces all or part of the hip joint with an artificial device (prosthesis) to eliminate pain and restore joint movement.

Hip Replacement Implant Options - Verywell

In the early days, all hip replacements were secured into the bone with cement. This is still the case for most knee replacements, for mechanical reasons that will be discussed in the knee section. The cement itself has changed very little, and polymethylmethacrylate (PMMA) cement is utilized in all sorts of orthopaedic applications where cement may be needed. In actuality, it functions more as a grout than true cement, filling in the porous spaces around a prosthesis.

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AB - Finite element studies show that the highest cement stresses are located at the most proximal and distal ends of the prosthesis. In vitro biomechanical and histologic analyses of autopsy-retrieved cemented femoral components show these areas to be associated with cement-prosthesis debonding. In this study, cement strains were measured in 2 geometrically different femoral stems in paired cadaver femora: A straight, collared, moderately tapered stem (Centralign) was compared with an anatomically curved, collarless, dramatically tapered stem (Scientific Hip Prosthesis [SHP]). Results showed that the maximum strain and the overall strain profile differed between the 2 stems. The Centralign had peak strains located at the most proximal gauge positions, whereas the peak strains of the SHP were located around the middle of the femoral stem. Minimization of cement strain, especially at the crucial proximal and distal areas of the stem, by altering component design may be able to reduce cement-prosthesis debonding and improve clinical results.

Choosing a Hip Implant (Prosthesis) - BoneSmart®

N2 - Finite element studies show that the highest cement stresses are located at the most proximal and distal ends of the prosthesis. In vitro biomechanical and histologic analyses of autopsy-retrieved cemented femoral components show these areas to be associated with cement-prosthesis debonding. In this study, cement strains were measured in 2 geometrically different femoral stems in paired cadaver femora: A straight, collared, moderately tapered stem (Centralign) was compared with an anatomically curved, collarless, dramatically tapered stem (Scientific Hip Prosthesis [SHP]). Results showed that the maximum strain and the overall strain profile differed between the 2 stems. The Centralign had peak strains located at the most proximal gauge positions, whereas the peak strains of the SHP were located around the middle of the femoral stem. Minimization of cement strain, especially at the crucial proximal and distal areas of the stem, by altering component design may be able to reduce cement-prosthesis debonding and improve clinical results.

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In a total hip replacement surgery, the painful parts of the damaged hip are replaced with artificial hip parts called a prosthesis, a device that substitutes or supplements a joint.