LI Yongqiang, ZHANG Ying, ZHOU Fang, CHEN Zhihui. Effects of probiotics toroches combined with basic periodontal therapy on oral microecological environment in patients with chronic periodontitis complicated with halitosis[J]. Journal of Clinical Medicine in Practice, 2019, (1): 63-66,70. DOI: 10.7619/jcmp.201901017