The biarticular or bipolar SURGIVAL system is a system for hip hemiarthroplasty in which the main objective is the preservation of the anatomic acetabulum and joint cartilage.
The design of this two-joint system offers the possibility of dual rotation by the combination of two spherical geometries thereby allowing to reduce friction and increase the life of the articular cartilage and therefore the system.
The two-joint system consists of; the two-joint dome, the two-joint insert and the femoral head. The dome and head are made of Stainless Steel 316 LVM thus offering high mechanical strength. Meanwhile the insert is made of UHMWPE Polyethylene ensuring high impact strength and wear.
The Biarticualr Head, also named Bipolar or Bicentrical, was conceived fundamentally to reduce the friction that developped, in most cases and
in an advanced form, in the cartilage acetabular to the direct contact of the metallic head of an endoprothesis in a classic hemi arthroplasty
The Biarticular Head consists of two parts: a metallic Cup that is in contact with the acetabulum and one Insert in polyethylene that adapts insidethe metallic cup whose interior fixes the head of the femoral stem. In this way there are two articulations made, one between acetabulum and
cup, and another between the inset an femoral head.
The Cup is made of stainless steel (AISI 316 LVM), and is presented in 15 sizes from 41 to 55 mm, with a cadence of 1 mm, in function of the diameter of the femoral head.
The Insert is made of polyethylene of a ultra high molecular weight (UHMWPE), that is translated in a minor “debri” by stress. It is presented in four
sizes with an internal diameter