1. Department of Oral and Maxillofacial Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, P. R. China
2. Department of Radiology, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, P. R. China
3. Department of Stomatology, Sijing Hospital of Songjiang District, Shanghai 201601, P. R. China
4. Department of Oral and Maxillofacial Surgery, Qilu Hospital of Shandong University, Jinan 250012, China