الفهرس 
TRIPOLAR HIP ARTHROPLASTYOnly 14 pages are availabe for public view
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Abstract
TRIPOLAR HIP ARTHROPLASTY
MOHAMED ELSAID KASBR
Tripolar procedure was introduced in the middle 1980s and involves the use of a bipolar femoral prosthesis that articulates with a standard THA acetabular component, during this time, case reports were published documenting the early success of this technique in treating difficult cases of recurrent instability
Tripolar hip arthroplasty can be used in in primary total hip arthroplasty in following conditions: alleviation of incapacitating pain in patients older than 65 years of age who could not be relieved sufficiently by nonsurgical means and for whom the only surgical alternative was resection of the hip joint.:Of secondary importance was the improved function of the hip. After the operation had been documented to be remarkably successful in patients with rheumatoid arthritis, inflammatory arthritis osteoarthritis(primary or secondary), avascular necrosis of the femoral head, and nonunion of the femoral neck, Fractures , Tumors and when Conservative treatment tried at first with increased weight, non steroidal anti inflamatory, walking stick in contralateral hand
Tripolar procedure consists of femoral and acetabular components, femoral components has many designs as (Charnley, Muller, Exeter, Furlong, C-stem) and there are cemented and cementless, Cemented as Polished, Textured and PMMA coated ,cementless are press-fit,hydroxyl apatite coating types And there are constrained ,unconstrained acetabular components to prevent recurrent dislocation, there are currently 21 constrained designs available, we found that a majority of the reports available describe the use of the Secure Fit/Trident , Constrained tripolar liners are the Duraloc/S-Rom and The other designs commonly used are the Ring Loc and Ring Loc II, which are similar in design to the Duraloc system.
There is no consensus as to the optimum surgical approach used in tripolar hip arthroplasty. Most approaches can be categorized as variations of the posterior approach (also known as Kocher Langenbock or Southern/Moore approaches), the anterolateral or Watson Jones approach, and the lateral or Hardinge approach. The two most popular approaches are the posterior approach and the anterolateral approach, each with their variations. It is generally thought that surgeons should not be rigid in their approach and technique should be based on patient profile and procedure planned.
Some complications of tripolar hip arthroplasty are specifically related to the procedure, whereas others are inherent to any major surgical procedure in elderly individuals. Some complications, such as nerve palsy, hemarthrosis, and thromboembolism, occur early after surgery. Loosening, component failure, and osteolysis typically are late complications that occur a number of years after initial success. Still others, such as infection, dislocation, and femoral fracture, can occur at any time in the postoperative period, depending on a number of circumstances