FH Orthopedics

The THIRA range is a range of straight, tulip-shaped femoral stems with trabecular relief, available in versions requiring cement or not.

This range has an implantation instrument set that is common to both types of stem, and that is adapted to anterior, posterior and anteroexternal (Roettinger) approaches.

Indications

This range of femoral stems is adapted to first intention hip operations, following coxarthrosis, fracture of the neck of the femur (as an intermediate hip prosthesis) or finally in case of simple revisions that do not require a long or locked femoral stem.

• First intention THA for coxarthrosis ;
• Fracture of the neck of the femur as intermediate hip prosthesis ;
• Simple revision following loosening of the femoral stem

The concept

The THIRA femoral stem has been on the market since 2000. It has a three-dimensional fixation principle at the level of its primary fixation. Its trabecular relief makes better penetration possible into the cancellous bone and increases the stem/bone contact surface.

The secondary fixation in ensured by means ofa hydroxyapatite deposit on the proximal 2/3 of the cementless stem.

Product characteristics

The THIRA range of stems is composed of a stem with a 130° cervico-diaphyseal angle and a cylindrical 12.5 mm neck making it possible to reduce the risk of impingement. The cone of this stem is a 12/14, which allows surgeons to use an alumina head.

The cementless stem is made of a titanium alloy with a hydroxyapatite coating on the proximal 2/3, and anodised on the rest of the stem. It has vertical anteroposterior macrostructures, for better adherence and a greater surface contact with the receiving bone.

The stem to be cemented is made of 316L stainless steel and mirror polished along its entire length.
THIRA to be cemented.