The femoral head shell Onlay is a hip resurfacing of the latest generation. It is manufactured by ESKA Implants. The minimal invasive implant permits an unique bone- preserving surgical procedure.For the Pure Resurfacing the femoral head only gets modified the surface with a broach, before it gets crowned with the Pure Resurfacing Onlay. The bone substance remains completely unaffected and the further wear of the joint is haltered. This is ideal also for younger patients who want to be back into active life very soon. There are many advantages of the Pure Resurfacing Onlay for the patient as well as for the surgeon
Construction of the Pure Hip Resurfacing Onlay®Resurfacing a hip is similar to a total hip replacement from a surgical perspective. Instead of resecting the arthritic femoral head, the head is reshaped and resurfaced with a metal mushroom-like cap. Because the shape of the femoral head should not get changed the implant has got a special thin metal-walled. The casting is of a cobalt-chrome alloy with a specific Biosurf surface. The Biosurf surface is copied from the nature. There are geometrically circular defined dimples that ensure adequate lubrication. Analogue to the retina of the eye the Biosurf has got many small reservoirs to keep fluid to secure a reliable articulation without danger of the abrasive wear what happened with the earlier prostheses. The Metal Shell is the pelvic part and it is prepared in a similar fashion to a total hip replacement. The rough structure is been cast as well as one piece with the Metal Shell. The Spongiosa Metal structure gives the important stabilised fixation of the implant immediately after implantation and for a long lasting fixation the bone grows into the porous structure. To help the surgeon to give you the best possible opportunity for your treatment even after a long time, the Metal Shell is built-on modular. The second part of the pelvic implant is an insert. This can get changed at any time without removing the fixated Metal Shell because this would waste more of your healthy bone. In case of revision after many years there can be implanted a ceramic or polyethylene insert but for the Pure Hip Resurfacing a metal insert is to be used.