1. The Affiliated Hospital of Qingdao University, Qingdao 266003, China
2. School of Stomatology of Qingdao University, Qingdao 266003, China
3. Dental Digital Medicine & 3D Printing Engineering Laboratory of Qingdao, Qingdao 266003, China
4. Shandong Provincial Key Laboratory of Digital Medicine and Computer-Assisted Surgery, Qingdao 266003, China