网页The Bipolar shell articulates against the host acetabular articular cartilage, preserving acetabular bone stock for future considerations. The System: Highly polished cobalt-chromium outer shell. Preassembled, monoblock construction. Self-centering design. Outer diameter size range from 40-46 mm is compatible with 22.2 mm femoral heads.
Bipolar hemiarthroplasty: Overview and what to expect - Medical News Today
网页2022年6月22日 · Bipolar hemiarthroplasty (BHA) is a surgical treatment for femoral neck fractures of the hip. An artificial joint with two bearings replaces the damaged joint. The...
网页the Bipolar Head to the proper anatomic and stable position. The Bipolar System ensures stability of the outer shell in the natural acetabu-lum while the stem has the ability to approx. 70 degrees internal freedom of rotation. In terms of wear, the Bipolar’s dual articulation uses primary internal articulation in order to help reduce
Medacta Corporate | Medacta Bipolar Head
网页The Medacta Bipolar Head is a product suitable to perform hemiarthroplasty on any hip joint whose acetabular conditions are satisfactory. The Medacta Bipolar Head includes an outer shell made of stainless steel, designed to articulate directly in the patient's acetabulum, an inner Ultra High Molecular Weight Polyethylene (UHMWPE) bearing ...
网页The BiPolar Head mates with a 22mm or 28mm CoCr femoral head and a femoral stem to complete a hip hemi-arthroplasty. The CoCr femoral head articulates against a UHMWPE insert, and the highly polished stainless steel outer shell articulates against the patient’s natural acetabulum.
Total hip arthroplasty compared to bipolar and unipolar ...
网页2022年2月19日 · In HHA, surgeons can choose to use a unipolar or bipolar femoral head, using the latter to maximize the longevity of the implant. B-HHA uses an additional inner bearing between the stem and the femoral head to decrease the rate of acetabular erosion and protrusion by maintaining joint stability and improving joint function [ 24 , 25 ].
Unipolar hemiarthroplasty versus bipolar hemiarthroplasty in the …
网页2011年2月8日 · Hemiarthroplasty (HA) is generally considered to be the treatment of choice in the most elderly patients with a displaced fracture of the femoral neck. However, there is inadequate evidence to support the choice between unipolar HA or …
Bipolar disorder - Symptoms and causes - Mayo Clinic
网页2024年8月14日 · Bipolar disorder, formerly called manic depression, is a mental health condition that causes extreme mood swings. These include emotional highs, also known as mania or hypomania, and lows, also known as depression.
Bipolar head design: inner bearing range of motion and
网页To address the clinical problems of joint stiffness, acetabular pain, and component wear, recent bipolar heads have been designed to achieve increased inner bearing range of motion. We tested four designs to determine if this compromises component integrity.
Joint motion of bipolar hemiarthroplasty in routine hip functional ...
网页2020年11月10日 · Bipolar hemiarthroplasty (HA) was initially developed for the treatment of displaced femoral neck fractures in elderly people to reduce the complications of unipolar HA, such as acetabular erosion and groin pain, which are caused by movement between the hard metal head and the acetabular cartilage [1, 2]. Bipolar prostheses are designed to have ...