Comparison of periodontal indices and Porphyromonas gingivalis between conventional and self-ligating brac-kets
Shi Jing, Liu Yuxin, Hou Jingqiu, Yan Zhengbin, Peng Hui, Chang Xing.
West China Journal of Stomatology . 2013, (3): 228 -231 .  DOI: 10.7518/hxkq.2013.03.003