1. Department of Prosthodontics Peking University School and Hospital of Stomatology Beijing China
2. Department of Prosthodontics Peking University School and Hospital of Stomatology National Clinical Research Center for Oral Diseases National Engineering Laboratory for Digital and Material Technology of Stomatology Beijing Key Laboratory of Digital Stomatology Beijing China
3. Department of Implantology Yinchuan Stomatology Hospital Yinchuan China