Trochanter retaining joint replacement
The TRJ® hip prosthesis stem is implanted without cement. The stem design is based on many years of experience with a conical diaphyseal anchorage in the femur.
The double tapered shape of the uncoated and surface radiated TRJ® hip stem straightens at the proximal lateral end so that the greater trochanter is preserved to the greatest possible extent during implantation.
The newly developed TRJ® rasp concept with a modular disconnected trochanter rasp supports safe muscle and trochanter preserving bone preparation with a very precise diaphyseal stem design.
The eccentric distal TRJ® stem tip simplifies the minimally invasive implantation in the femur and prevents the risk of varus stem positioning. The TRJ® range of stems is available in a range of sizes standard and lateralized and allows universal adjustment to different femur morphologies and correction of pathological joint and leg length anatomies.
The TRJ® hip prosthesis stem can be combined with cementless and cemented acetabular implant systems. The modular cup systems Plasmacup® and Plasmafit® allow both 36 mm ceramic-ceramic large head articulation with Biolox® delta components and ceramic-polyethylene or metal-polyethylene with highly crosslinked Vitelene® polyethylene with vitamin E.
The newly developed TRJ® rasp concept includes a modular disconnected trochanter rasp, so that the main rasp can be cut free in the proximal-lateral section.
The femoral rasp preparation is designed to anchor into the region of the distal bearing bone structures.
The denticulation of the TRJ® main rasp does not come into contact with the greater trochanter and the adjacent abductors. This allows a precise neutral positioning of the rasp in the bone. There is no pressure on the soft tissue or against the greater trochanter.
The modular uncoupled TRJ® trochanter rasps are not used until the end, so that the proximal-lateral bone below the trochanter can be accurately prepared with the flat resting main rasp. The combination of the TRJ® system (Trochanter Retaining Joint Replacement) with the Aesculap MIOS® approach instruments (Minimally Invasive Orthoaedic Solutions) ensures gentle and precise implantation techniques for standard minimally invasive surgical approaches to the hip joint.