Institution: | 1.Department of Oral and Maxillofacial Surgery, Suining Central Hospital, Suining, Sichuan 629000, P.R. China;2.Department of Endodontics, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China;3.Medical Beauty Department, Suining Central Hospital, Suining, Sichuan 629000, P.R. China |