Cementless femoral stem BA

The concept of this femoral component relies on a dose prosthesis-bone contact in both medial and lateral zones. The stem geometry shows a proximal to distal 3 degree taper providing a greater femoral canal fill, improving rotational stability and transferring load in the proximal calcar region to restore near normal stress distribution. Proximal off-loading reduces stress-shielding and thereby minimizes the potential for loosening. Straight stemmed wedge-shaped prosthesis have been widely used throughout more than 20 years and have proven to be very effective in both cemented as well as uncemented cases. Rotational Stability A critical parameter for successful THR is rotational stability, to which the design of the BA stem contributes through its geometry in combination with being collar-less. A collar-less prosthesis tends to allow for self seating, thereby improving load transfer to the femur and maintaining stability. Lasting Fixation Uncemented I Cemented Stems Long term survival of uncemented components depends not only on implant material and geometry, but also on the coating used for a biological fixation. For this reason, BioTech ™ has chosen the well-proven process of applying a circumferential plasma-sprayed porous titanium coating. This type of “dosed-pore” coating has no inter-connective spaces, a pore size ranging between 75-350 micron, thickness of 500 micron and approximately 30% porosity.