机构:Department of Oral and Maxillofacial Surgery, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, Shandong 266003, China; School of Stomatology of Qingdao University, Qingdao, Shandong 266003, China,Department of Oral and Maxillofacial Surgery, Qingdao Municipal Hospital Affi