P.S.I Total Knee Replacement

Computer assisted (CAOS) and passive robotic surgery systems in orthopedics (M.A.K.O), try to minimize intraoperative problems and give solutions to restore the mechanical axis of the leg, in order to improve the clinical and functional outcome.

Actual revolution in total knee replacement, has recently been put on the improvement of prosthetic materials, in conjunction with patient specific instrumentation (P.S.I).

So today, new “biologic” materials, a result of technological revolution and long-term studies in biotechnology laboratories come to promise patients excellent results, and long lasting (forever) prosthetic materials, without need to be changed.

These new materials are made of specific metal alloys, have almost equal elasticity with the host bone, are totally demagnetized, are very light can be manufactured individually for each patient. The plastic insert between the metal parts of the prosthesis used to replace the meniscus is “soaked” with vitamin E, the most powerful antioxidant in the human body, by using a specific laboratory technique. The new technology is a new class of materials in total knee arthroplasty and excels in all comparative analyzes in relation to the materials we use even today, combining real antioxidant stability, high mechanical strength and extremely low wear.

In fact the new materials exhibit 86-87% less wear than the corresponding materials made by melting and compression.

The tibial insert has an accurate dimensional correlation so that locks to the prefix of the tibia and has a specific locking mechanism that prevents micromotion and further reduces the wear at the interface contact.

The most modern total knee replacement has to fulfill three major prerequisites, according to Dr. Alevrogianni, Just a 5 cm incision, implant that fits perfectly into the bone morphology of the patient and prosthetic materials that last for a lifetime, give the ultimate success!!!!!!

These new materials are made of specific metal alloys, have almost equal elasticity with the host bone, are totally demagnetized, are very light can be manufactured individually for each patient. The plastic insert between the metal parts of the prosthesis used to replace the meniscus is “soaked” with vitamin E, the most powerful antioxidant in the human body, by using a specific laboratory technique. The new technology is a new class of materials in total knee arthroplasty and excels in all comparative analyzes in relation to the materials we use even today, combining real antioxidant stability, high mechanical strength and extremely low wear.

In fact the new materials exhibit 86-87% less wear than the corresponding materials made by melting and compression.

The tibial insert has an accurate dimensional correlation so that locks to the prefix of the tibia and has a specific locking mechanism that prevents micromotion and further reduces the wear at the interface contact.

The most modern total knee replacement has to fulfill three major prerequisites, according to Dr. Alevrogianni, Just a 5 cm incision, implant that fits perfectly into the bone morphology of the patient and prosthetic materials that last for a lifetime, give the ultimate success!!!!!!

“The use of smaller incision does not make any damage to the surrounding muscles and tissues, expedites the surgical time (50 minutes surgery), significantly reduces blood loss (only 1 out of 50 patients have the need of blood transfusion in the operating room), leads to faster post-operative mobilization and wound healing. Hospitalization is limited to 2-3 days, but the main advantage is that the patient returns quickly and safely to their daily activities. ”

“With the patient specific instruments, the prosthetic materials are strictly adapted to the anatomy of the joint of the patient. Most importantly, the mechanical axis is restored. The patient has the best functional outcome and potentially avoid surgery on concomitant joints. ”

“With the new biological materials, the wear rate is avoided within the joint and the need for future revision surgery is almost diminished, avoiding further financial costs and psychological stress.”

Most fractures of the hip region, concerning the femoral neck a thin portion of the femur, which helps bind the femoral head with the acetabulum in the pelvis. Once a fracture in this bone region, often the blood supply is stopped to the head. This can lead to severe damage of the joint with osteonecrosis and secondary coxarthrosis, if not treated with the appropriate surgery.