1. Center of Oral Implantology, Stomatological Hospital, School of Stomatology Southern Medical University Guangzhou China
2. Department of Prosthodontics, School and Hospital of Stomatology Guangzhou Medical University Guangzhou Guangdong China
3. School and Hospital of Stomatology, Guangdong Engineering Research Center of Oral Restoration and Reconstruction Guangzhou Medical University Guangzhou Guangdong China
4. Department of Stomatology, Zhujiang Hospital Southern Medical University Guangzhou China
5. Department of Periodontology, Stomatological Hospital, School of Stomatology Southern Medical University Guangzhou China