1. Department of Oral and Maxillofacial Surgery, First Hospital of Shanxi Medical University, Taiyuan, China
2. Department of Orthodontics, First Hospital of Shanxi Medical University, Taiyuan, China
3. Shanxi Provincial People’s Hospital of Stomatology,Taiyuan,China
4. Shanxi Medical University School and Hospital of Stomatology, Taiyuan, China
5. Department of Prosthodontics, First Hospital of Shanxi Medical University, Taiyuan, China
6. State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Oral Implants, School of Stomatology, The Fourth Military Medical University, Xi’an, People’s Republic of China