1. Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology Xi'an Jiaotong University Xi'an China
2. Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases, College of Stomatology Xi'an Jiaotong University Xi'an China
3. Department of Cariology and Endodontics, College of Stomatology Xi'an Jiaotong University Xi'an China
4. Department of Cariology and Endodontics Baoji Stomatological Hospital of Shaanxi Baoji China