Introduction: This prospective study focuses on the issue of a reliable prosthesis/bone fixation and compares the clinical and radiological outcome of the cemented and uncemented version of the prosthesis.

Methods: The prosthesis 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. From 1991 to 12/2007 we performed 624 medial implantations with cement (age 51–95, mean 71 years) and 185 cementless (age 40–84, mean 65 years). Other criteria as were similar. The follow up is (1.6–17) mean 9 years and seized 93% of the cases. They are assessed according to the KSRS and analyzed radiologically (F. C. Ewald).

Results: Knee Score (pre/post) cemented 41/93, cement-less 39/95. Function Score (pre/post) cemented 56/90, cementless 59/94. ROM increased for the cemented group Flex/Ex 107°/5° to 121°/2°, for the cementless Flex/Ex 107°/4° to 124°/1°.

Loosening needing revision: 15 times (2.5%) in the cemented group and 3 times (1.7%) in the cementless group. The survival rate (endpoint revision) is at 10 years: cemented 93.7%, cementless 94.5%.

The radiological investigation showed less radiolucent lines in the cementless cases in comparison to the cemented.

Conclusion: The prosthesis gives excellent results in the cemented and cementless application. The knee and function scores show similar improvements. The loosening rate of the cementless cases is even lower despite the higher physical demands of this 6 year younger group. The cementless fixation is attractive for younger patients and is pre-eminent for the mini-invasive implantation 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: 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.