1. Department of Stomatology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
2. Department of Geriatrics, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
3. College of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
4. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Sichuan, China
5. Department of Radiology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China