1 Department of Oral and Maxillofacial Surgery, The Affiliated Tai'an City Central Hospital of Qingdao University, China.
2 Department of Stomatology, The Affiliated Tai'an City Central Hospital of Qingdao University, China.
3 Department of Oral and Maxillofacial Surgery, The Affiliated Tai'an City Central Hospital of Qingdao University, China. Electronic address: 13954887265@163.com.