The bi-articular hip prosthesis for fractures of the femoral neck—a preliminary report

Tribology of Hemiarthroplasty

“…Bateman (1974) described that the bipolar prosthesis provides two surfaces for motion, which transfer the motion of the metal head in the acetabulum to the low friction inner bearing of the prosthesis. Later, further bipolar prostheses have been developed: the Hastings Hip (Devas and Hinves, 1983), the Variokopf (Verberne, 1983), and Bi-articular hip prostheses (Franklin and Gallannaugh, 1983), which all comprise a femoral component with a spherical head that articulates with a high-density polyethylene acetabular insert, enclosed by an outer steel shell. Other design such as the Monk prosthesis (Monk, 1976) which was originally made of polyethylene alone was subsequently modified to be covered with an outer metal shell (Chen et al, 1980).…”

Induction of Hypotheses Concerning Hip Arthroplasty: A Modified Methodology for Medical Research

“…Since BPEP was only recently introduced, studies about the degree of success of its implantation in a greater number of patients are not yet available (21,22). Some researchers have presented highly successful series of BPEP implantations for treatment of acute medial femoral neck fracture (5,10,11,17,18,(23)(24)(25), but at present, it is possible to conclude that the indications for bipolar hip arthroplasty versus total hip arthroplasty following an acute medial femoral neck fracture have not yet been determined (21). For instance, should bipolar hip arthroplasty provide better results than total hip arthroplasty in elderly patients, could this also be true for younger patients?…”