Journal of Oral Science Research
Black Triangle in Orthodontic Patients with Mandibular Incisor Extractions: Prevalence and Etiology
ZHU Meng, SUN Weiman, WANG Jinmeng, LI Houxuan, LEI Lang
Journal of Oral Science Research . 2022, (10): 972 -976 .  DOI: 10.13701/j.cnki.kqyxyj.2022.10.015