Introduction: Increasing experiences in determining the indication for UKA and improvements in design and materials of the prosthesis led to better results. The AMC-Uniglide has an unconstrained mobile bearing with congruent area contact. This ensures complete freedom to rotate and slide upon one other with physiologic kinematic and low intrinsic stability. Material and Methods:. Minimal-invasive technique 30 patients with minimal-invasive AMC-Uniglide implantation technique were compared with 30 conventional implanted AMC’s and 30 total knee replacements in regard to rehabilitation and accuracy of implantation. 361AMC-Uniglides 361 consecutive patients were investigated after AMC-Uniglide implantation. The mean duration of follow-up was 5.5 (2.3-12.5) years. Patients were reviewed using the American Knee Society Rating System. The roentgenographic analyses were performed with the American Knee Society Evaluation System. Results:. Minimal-invasive technique The comparison of 30 minimal-invasive UKA with 30 conventional UKA and 30 total knee replacements show an advantage of minimal invasive technique with regard to a reduced time of rehabilitation. The accuracy of implantation was comparable between the conventional and the minimal-invasive technique. 361 AMC-Uniglides Ninety-five percent of patients had no pain or slight pain at the latest follow-up, ninety-two percent had good or excellent clinical outcome. Three knees were revised for mobile bearing dislocation after medial UCA and three for lateral mobile bearing dislocation after lateral UCA. Five revisions because of component loosening were performed and there was one case of deep infection. Conclusion: The clinical results of the investigated patients demonstrate that the AMC-Uniglide is a successful concept with a safe anchorage of the prosthesis and a good durability of the mobile bearings. An advantage of minimal invasive technique with regard to a reduced time of rehabilitation was found. The accuracy of implantation was comparable between the conventional and the minimal-invasive technique

Increasing experiences in determining the indication for UKA and improvements in design and materials of the prosthesis led to better results. The AMC-Uniglide has an unconstrained mobile bearing with congruent area contact. This ensures complete freedom to rotate and slide upon one other with physiologic kinematic and low intrinsic stability. Minimal-invasive technique 30 patients with minimal-invasive AMC-Uniglide implantation technique were compared with 30 conventional implanted AMC’s and 30 total knee replacements in regard to rehabilitation and accuracy of implantation. 361 AMC-Uniglides 361 consecutive patients were investigated after AMC-Uniglide implantation. The mean duration of follow-up was 5.5 (2.3–12.5) years. Patients were reviewed using the American Knee Society Rating System. The roent-geno graphic analyses were performed with the American Knee Society Evaluation System. The clinical results of the investigated patients demonstrate that the AMC-Uniglide is a successful concept with a safe anchorage of the prosthesis and a good durability of the mobile bearings. An advantage of minimal invasive technique with regard to a reduced time of rehabilitation was found. The accuracy of implantation was comparable between the conventional and the minimal-invasive technique

Introduction: Unicompartmental kneearthroplasty became applicated in the past decade also in younger more active patients. Therefore the durability of the bone anchorage and polyethylene wear are at increased risk for failure. Provides the cementless implantation of the AMC-Uniglide prosthesis a reliable fixation? Are the clinical and functional results comparable to the cemented version of this prosthesis?. Methods: The AMC-Uniglide ensures congruent area contact with physiological kinematics resulting from imitation of the healthy morphology of the femoral condyle and unrestricted movement of the polyethylene bearing. This also secures a low intrinsic stability, which relieves the implant-bone fixation. There is a cemented and cementless version of this prosthesis. From 1991 to 12/2003 we performed 477 implantations with cement and 137 cementless. The follow up is (3–14) mean 8 years and seized 96% of the cases. They were assessed according to the Knee Society Rating System and analyzed radiologically (F. C. Ewald). Results: Knee Score cemented 35/94, cementless 36/94 (pre/post). Function Score cemented 52/90, cementless 54/92 (pre/post). Rang of movement improved from flexion/extension 109/5/0 to 124/2/0. Patient assessment was (cemented/cementless) excellent 72%/75%, good 20%/18%, fair 5%/5%, poor 3%/2%. Loosenings needing revision: 10 times (2%) in the cemented group, 2 times (1,5%) in then cementless cases. The radiological investigation showed less radiolucent lines in the cementless cases. Conclusion: The cementless implantation of the AMC-Uniglide gives excellent results comparable to the cemented version. The loosening rate is even lower. A stable interface at 1 year never deteriorated! The cementless fixation is attractive for younger patients (less 70 years) and is preeminent for the mini-invasive implantation technique