1. Department of Prosthodontics Hebei Key Laboratory of Stomatology Hebei Clinical Research Center for Oral Diseases School and Hospital of Stomatology Hebei Medical University Shijiazhuang PR China
2. Department of Orthodontics Hebei Key Laboratory of Stomatology Hebei Clinical Research Center for Oral Diseases School and Hospital of Stomatology Hebei Medical University Shijiazhuang PR China
3. College of Forensic Medicine Hebei Medical University Shijiazhuang PR China