1 Department of Periodontics, School and Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Changchun, 130021, Jilin, China.
2 Department of Orthodontics, Tianjin Key Laboratory of Oral and Maxillofacial Function Reconstruction; Tianjin Stomatological Hospital; Hospital of Stomatology, Nankai University, 75 Dagu North Road, Tianjin, 300041, China.
3 Department of Periodontics, School and Hospital of Stomatology, Jilin University, 1500 Qinghua Road, Changchun, 130021, Jilin, China. shenyqjlu@126.com.