Knee Replacement Implants
During the knee replacement operation, the orthopaedic surgeon would replace the injured knee with prosthetic components. Different types of implants are available, and the one used for the surgery will be determined by factors such as the patient’s needs and the anatomy of the knee, as well as the patient’s age, weight, overall health, and activity level, the implant’s performance and cost, the doctor’s experience, and familiarity with device. The surgeon goes through the several types of implants that will be needed for the knee replacement procedure.
What are the components of the implants?
Ceramics, metal alloys, and tough plastic pieces can all be used to make the implants. In a complete knee replacement, up to three bone surfaces may be replaced.
The upper surface of the tibia – This section is usually a flat metal component with a polyethene cushion. There may be designs that link the polyethylene to the bone directly.
The rear of the patella – This part is usually manufactured of polyethylene to mimic the patella’s form. It is not necessary to resurface it on a regular basis.
The metal component of the femur’s bottom surface curls around the femur. The kneecap can glide up and down against the bone with ease. Many different types of implants are available for knee joint therapy.
Oxinium Implants
Smith & Nephew manufactures the oxinium metal alloy, which is a proprietary metal alloy. It’s a zirconium metal alloy that’s been oxidised, converting the metal surface into ceramic, thanks to a proprietary procedure. The material has a ceramic-like surface and a metal-like structure. Smoothness, hardness, and scratch resistance are all features of this metal alloy. It has double the hardness and scratch resistance of cobalt-chrome alloys.
Experiments and research have revealed that a surface constructed of oxinium lowers wear by up to 50%. When compared to ceramic, the material is far less fragile. As a result, the likelihood of brittle fractures is minimised. The nickel level is low, lowering the risk of metal sensitivity in patients. In most cases, the femoral component is constructed of oxinium.
Each implant has its own personality and wear and tear characteristics. The biocompatibility of these implants varies as well.