Prospective Clinical 5-year Follow-up of the LINK® Endo-Model® SL®

Inclusion criteria * Implantation of the LINK® Endo-Model® SL®. * Between 18 and 78 years of age. * Patient has signed the Informed Consent. The indications and contraindications for the implantation of the LINK® Endo-Model® SL® listed in the product catalogue and chapter 2.5 and 2.6 \[of the protocol\] are applicable and have to be considered / fulfilled Exclusion criteria * Body Mass Index (BMI) \> 40 kg/m2 * Poor general state of health with a foreseeable life expectancy of less than 5 years * Knee replacement on the contralateral side within the last year and with a KSS fuctional score \< 70 points * Comorbidities and known medical circumstances which forseeable affect the clinical functional results after implantation (e.g. neurological or musculoskeletal impairments) * Revision in floride septic environment * Female patient who is pregnant * Prisoner * Patient who, as judged by the surgeon, is mentally incompetent or is unlikely to be compliant with the prescribed postoperative routine and follow-up evaluation schedule