1. The Third Department of Oral and Maxillofacial Surgery Hospital of Stomatology, Jilin University Changchun Jilin China
2. Department of Prosthodontics Hospital of Stomatology, Jilin University Changchun Jilin China
3. Department of Oral and Maxillofacial Surgery Clinic Hospital of Stomatology, Jilin University Changchun Jilin China
4. Department of Endodontics Hospital of Stomatology, Jilin University Changchun Jilin China
5. Department of Dental Implantology Hospital of Stomatology, Jilin University Changchun Jilin China
6. Department of Pedodontics Hospital of Stomatology, Jilin University Changchun Jilin China