Clinical evaluation of Er:YAG laser in the treatment of grade Ⅱ periodontitis with bifurcation lesions
WU Yu-zhuo, ZHOU Yan, MEI You-min, HUAN Hong, SUN Jing-wei
Shanghai Journal of Stomatology . 2020, (3): 308 -311 .  DOI: 10.19439/j.sjos.2020.03.015