The Helica System of Total Hip Replacement is unique in a number of respects.
Most cementless systems rely on a ‘press fit’ for at least one implant component. Creation of the site for the component is critical and technically demanding or the component will not lock into position. In addition, press fit components are vulnerable until osseous integration develops over several weeks (if it happens at all). In man this is less of an issue in that the patient can strictly control the stress placed on the new hip. We have much less control over our canine patients during this critical phase.
Both Helica components screw into position giving post operative security during the phase of osseous integration. The cup is not only fixed very rigidly but can even be re-positioned intra-operatively, should it be required, without losing any security. The Helica cup may be used with all other leading brands of stems to create a hybrid system with maximum cup security.
The stem is a short prosthesis located entirely in the proximal femur. Only the articular surface is removed during implantation retaining the maximum bone stock. The new Three Part Stem (TPS) ensures more accurate positioning of the stem in addition to an increased surface area for load dispersement. A choice of flanges is available to suit individual femoral neck size.
The surface of both acetabular shell and femoral stem are treated to maximise osteointegration of implants.
The outer surface of the acetabular cup is threaded for rapid screw-in insertion. Repositioning of cups intraoperatively is straight forward. Revision cups for other systems are available.
Both femoral and acetabular components screw into position allowing immediate loading. The surface finish of the titanium components encourages rapid osteointegration. Flexibility is achieved by:
• 5 Stem sizes
• 6 Neck lengths
• 3 Flanges for the femoral neck
• 6 Acetabular Cup sizes
Once the implantation sites have been prepared the implants self tap into position.
• Short surgery time
• Minimally invasive
• Cementless technique
• Screw-in implants
• Immediately loadable
• Cost effective