 This study is a post-market clinical follow-up PMCF study to fulfill the post-market surveillance obligations according to Medical Device Directive and MEDDEV 2.12-2_Rev2_January 2012. The data collected from this study will serve the purpose of confirming safety and performance of the TM Ardis implant. The goal of this study is to demonstrate that implant is effective in reducing patient disability, which will be assessed with the ODI questionnaire. 