1. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases West China Hospital of Stomatology, Sichuan University Chengdu China
2. Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital Zhejiang University School of Medicine Hangzhou China
3. China West Normal University Nanchong China
4. Sichuan Inspection and Testing Center for Dental Devices and Materials Ziyang China