The “PI-3 Dislocation intervention without socket-to-socket contact” standard developed by PI Medical Implants describes a procedure for testing luxation intervention without socket-to-socket contact.
-girisimi.jpg "PI-3 Dislocation Attempt Without Socket-to-Socket Contact")
The term luxation means dislocated or dislocated. Therefore, a luxated patella is a kneecap that has popped out or moved out of its normal place.
Internal hip prostheses tend to dislocate in a cranial direction. For mechanical reasons, dislocation only occurs when the resulting load acts across the dislocation point or when the cup and stem impinge.
This test method does not simulate dislocations (luxations) due to excessive muscle relaxation or capsular tension. Most luxation events have multiple causes. The purpose of the tests performed is to obtain information about the resistance of a modular insert as well as the resistance to abrasive wear (rigid/rigid bond). Impact-induced and impact-induced dislocations are simulated using two different test setups. The procedure can be performed up to several thousand luxations/repositions using loads up to 3 kN.
Particularly common in dogs, patellar luxation is a condition in which the patella, or kneecap, can move to one side or the other from its normal central position at the front of the knee or knee joint. This condition is most common in small breeds, but can also be seen in large breeds and cats. In most dog breeds, the most common direction of abnormal movement is toward the dog's midline (medial patellar luxation). In some cases, it can be away from the midline.
The patella is a small bone located within a tendon in the knee joint. The patellar tendon sits in a groove at the end of the thigh bone (femur) and attaches to the shin bone (tibia) just below the knee. A patellar dislocation occurs when the kneecap slips or comes out of place in the femoral groove when the knee is flexed, causing a dislocation.
Hip endoprostheses tend to dislocate cranially. Some of the known factors that increase dislocation include:
Dislocation due to excessive release of muscle or capsular tension is not simulated in this test. Most cases of dislocation may have more than one cause as classified above.
Alumina and zirconium have been used in hip joint prostheses for decades. Mechanical durability is increased by blending both materials. The surface resistance of the head and lining of ceramic joint partners is tested against damage in accordance with the PI-3 standard using a special luxation apparatus. Both new ceramic materials showed better resistance to damage and roughening of stressed surface areas during luxation testing than alumina.
Among the numerous testing, measurement, analysis and evaluation studies that our organization has carried out for businesses in various sectors, it also provides testing services defined in the “PI-3 Dislocation (luxation) attempt without socket-to-socket contact” standard with its trained and expert staff and advanced technological equipment.
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