Aseptic displacements are the main reason for replacement surgery after endoprosthetic knee replacement. Other common causes may be infection of the implant or problems of the kneecap.Due to the rapid increase in the number of primary knee implant surgeries, an increasing number of revision sugeries is expected as well. Implant replacement because of luxation is rare, however. Replacement surgery is significantly more demanding than the implantation in the first place. These difficulties refer to both the managment of intraoperative problems such as loss of bone substance or periprosthetic fracture and the restitution of a soft tissue environment which allows regular movement of the ligaments of the knee and the patella.Besides, the choice of the implant demands lots of experience in the case of insufficient soft tissue structures.Finally, there is an elevated risk of postoperative infections and wound-healing defects.
