Effect of tooth-whitening products on hardness of demineralized and stained teeth after orthodontic treatment
LU Lin, GUO Zhi-juan, QIE Hui, LI Chen-xi, ZHANG Fan, SHAN Li-huan
Journal of Hebei Medical University . 2022, (6): 698 -701 .  DOI: 10.3969/j.issn.1007-3205.2022.06.016