1. Department of Periodontics, Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology China Medical University Shenyang China
2. Department of Dental Materials, Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology China Medical University Shenyang China
3. Department of Emergency and Oral Medicine, Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology China Medical University Shenyang China