EasyHip -Model E-688 -Cementless Cup
All surgical approaches can be used while implanting EasyHip Cementless Cups components. All the following steps apply for postero-lateral surgical approach and all other surgical access routes. The patient lies on his/her side. The incision is done postero-laterally. After opening of the fascia-lata, external rotator muscles are resected and the joint capsule is incited. Then, the femoral head is dislocated in dorsal direction so that it lies free.
Preoperative Planning
It is important to plan the intervention preoperative^ in order to select the correct implant type and size and its final intraosseous position based on the patient individual anatomy. The surgeon should perform a careful evaluation of the patient`s clinical condition and consider the level of physical activity before performing a hip replacement.
For optimal results, the surgery should be planned in advance using the appropriate templates. The magnification factor of the X-rays must be compatible with the factor on the templates. Special X-ray templates are available in standard 1.1:1 scale.
The implant size must be chosen from adequate AP and ML X-rays with sufficient legibility. Each X-ray should be large enough for application of the whole template. A second X-ray of the unaffected joint is often helpful.
Inadequate pre-operative planning can lead to improper selection of the implants and/or incorrect implant positioning.
In principle, a load-bearing, stable acetabular fossa and solid lateral osseous coverage is desirable.
The inclination of the cup should not be significantly above or below 45°.
The anteversion should not be significantly above or below 15°.
Placement outside of these boundaries will result in reduced range of motion, which could subsequently lead to subluxation and/or dislocation of the joint.
Note: Preoperative planning provides an initial estimation of the final situation but cannot conclusively determine the most adequate size to be used. The ultimate decision can only be taken intraoperatively.