FH Orthopedics

ESOP is a range of cementless femoral stems that are anatomical and modular, available in 10 sizes of metaphysis for each side as well as a range of 7 diaphyses. This wide range of implants thus allows surgeons to propose, during the peri-operative period, a combination of 70 possibilities for each side.
This principle of adapting the prosthesis to the morphology of the patient’s femur, rather than the opposite, is called “morphoadaptation”.

After validating the excellent results obtained with this prosthesis, and after almost 20 years of clinical follow-up, we have modified this prosthesis so as to adapt it to LIS (Less Invasive Surgery), with a range of 3 diaphyseal pegs, thus increasing the morphoadaptation to 80 possibilities for each side.

The set of instruments provided with this femoral prosthesis is simple, precise and satisfies the various requirements in terms of LIS approach, be it anterior, posterior, anteroexternal…

Indications

This range of femoral stems is adapted to first intention hip operations following coxarthrosis or a fracture of the neck of the femur, as well as for intermediate hip prosthesis surgery or finally in cases of simple revision that does not require a long or locked femoral stem :

• Coxarthrosis, first intention THA ;
  
• Fracture of the neck of the femur as intermediate hip prosthesis ;
  
• Simple revision.

The concept

The concept of the ESOP femoral stem was developed in 1991 to adapt the femoral stem to the morphology of the patient’s bone.

This stem is composed of 2 elements:

• A tulip-shaped metaphyseal part, guaranteeing adherence and maximum metaphyseal filling, plus an HAP coating for better secondary fixation.
• A diaphyseal part made of anodised titanium to prevent any bone adherence, and guaranteeing that the femoral prosthesis is guided and oriented perfectly.
  

Product characteristics

The ESOP femoral stem is made from a TA6V ELI titanium alloy in 2 parts:

• The metaphyseal range comes in 10 left sizes and 10 right sizes, from sizes 5 to 20, with a hydroxyapatite coating,
• The lengths of the necks and offsets are homothetic, depending on the different sizes,
• The cylindrical neck is a 12/14 neck that makes it possible to use alumina femoral heads, with a cervicodiaphyseal angle of 135°.

The range of diaphyses is also made from a titanium alloy, but anodised so there is no adherence at this level of the femur.
This range is composed of 7 sizes of standard diaphysis, with diameters from 9 to 15 mm, completed by 3 sizes of diaphyseal pegs that are more adapted to LIS surgery.