When a fracture occurs in this area of the bone, it can cut off blood supply and lead to severe joint damage that cannot be treated with conservative methods. What is a bipolar hemiarthroplasty? Treatment for femoral neck fractures can be successfully achieved through a bipolar hemiarthroplasty.
Medical uses[ edit ] Bipolar prothesis hip replacement is most commonly used to treat joint failure caused by osteoarthritis. Other indications include rheumatoid arthritisavascular necrosistraumatic arthritisprotrusio acetabulicertain hip fracturesbenign and malignant bone tumorsarthritis associated with Paget's diseaseankylosing spondylitis and juvenile rheumatoid arthritis.
The aims of the procedure are pain relief and improvement in hip function. Hip replacement is usually considered only after other therapies, Bipolar prothesis as physical therapy and pain medications, have failed. Main components of a hip prosthesis  A titanium hip prosthesis, with a ceramic head and polyethylene acetabular cup The modern artificial joint owes much to the work of Sir John Charnley at Wrightington Hospital.
His work in the field of tribology resulted in a design that almost completely replaced the other designs by the s. Charnley's design consisted of three parts: Unfortunately, the smaller head dislocated more easily.
Alternative designs with larger heads such as the Mueller prosthesis were proposed. Stability was improved, but acetabular wear and subsequent failure rates were increased with these designs.
The Teflon acetabular components of Charnley's early designs failed within a year or two of implantation. This prompted a search for a more suitable material.
A German salesman showed a polyethylene gear sample to Charnley's machinist, sparking the idea to use this material for the acetabular component. Charnley's other major contribution was to use polymethylmethacrylate PMMA bone cement to attach the two components to the bone.
For over two decades, the Charnley Low Friction Arthroplasty, and derivative designs were the most used systems in the world. It formed the basis for all modern hip implants.
The Exeter hip stem was developed in the United Kingdom during the same time as the Charnley device. Both designs have shown excellent long-term durability when properly placed and are still widely used in slightly modified versions.
Early implant designs had the potential to loosen from their attachment to the bones, typically becoming painful ten to twelve years after placement. In addition, erosion of the bone around the implant was seen on x-rays.
Initially, surgeons believed this was caused by an abnormal reaction to the cement holding the implant in place. That belief prompted a search for an alternative method to attach the implants.
The Austin Moore device had a small hole in the stem into which bone graft was placed before implanting the stem. It was hoped bone would then grow through the window over time and hold the stem in position.The bipolar hip prostheses after some time functions as a unipolar device.
There is a need to change the design of bipolar hip prostheses to make it function as a bipolar device over a prolonged period of time.
A bicentric bipolar hip prosthesis was used as an implant for various conditions of the hip. Hip replacement is a surgical procedure in which the hip joint is replaced by a prosthetic implant, that is, a hip prosthesis.
Hip replacement surgery can be performed as a total replacement or a hemi (half) replacement. Such joint replacement orthopaedic surgery is generally conducted to relieve arthritis pain or in some hip fractures.
Bipolar Hip Prosthesis Stainless Steel. These are intended for i) Hemiarthroplasty for patients with massive acetabular deficiencies which do not permit secure fixation of the acetabular component, ii) Hip instability caused by a deficiency of the abductors is a relative indication and iii) Patient with no abductor musculature.
Hemiarthroplasty means replacing the hip joint with a metal prosthesis. Unipolar prostheses has a one-piece design where the hip movement occurs between the prosthesis and the acetabulum (hip socket).
A bipolar prosthesis has an additional artificial joint between the two components of the prosthesis. What is a bipolar hemiarthroplasty? Treatment for femoral neck fractures can be successfully achieved through a bipolar hemiarthroplasty.
Hemiarthroplasty is a surgical procedure that replaces one half of the hip joint with a . Dec 02, · As indicated in the parenthetical note immediately following code , the appropriate code to report prosthetic hip replacement (eg, bipolar arthroplasty) following fracture of the hip, is , Open treatment of femoral fracture, proximal end, neck, internal fixation or prosthetic replacement (direct fracture exposure).