1. Division of Orthodontics, Beijing Stomatological Hospital Capital Medical University Beijing China
2. Division of Fixed Prosthodontics and Biomaterials University Clinic of Dental Medicine, University of Geneva Geneva Switzerland
3. Peking University Hospital of Stomatology First Clinical Division Beijing China
4. National Engineering Laboratory for Digital and Material Technology of Stomatology Beijing Key Laboratory of Digital Stomatology Beijing China
5. Geistlich Pharma AG Wolhusen Switzerland