Cementless femoral stem ESOP

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The ESOP femoral stem was developed in 1991 in order to match the shape of the femoral stem to the shape of the patient’s bone. This stem has 2 components: – a flared metaphyseal portion coated with hydroxyapatite, – a diaphyseal portion made of anodised titanium. The ESOP product line of anatomical modular cementless femoral stems consists of 10 metaphysis sizes for each side and 7 standard diaphysis lengths. This comprehensive set of implants provides 70 possible left and right combinations intra-operatively. It is based on the principle of adapting the implant to the patient’s femur shape, and not the other way around. Features and materials: The ESOP stem is made of titanium alloy (TA6V ELI). The metaphyseal component has a hydroxyapatite coating and is available in 10 left sizes and 10 right sizes ranging from 5 to 20. The offsets and neck lengths increase as a function of the size. The cylindrical neck has a 12/14 taper for use with alumina ceramic femoral heads; the neck-shaft angle is 135°. The diaphyseal component is made of anodised titanium alloy. There are 7 different sizes of the standard diaphyseal component ranging from 9 to 15 mm in diameter. Instrumentation: The ESOP instrumentation can be used with all the standard surgical approaches. Rasp holders are available for the posterior and anterior routes.