1·To dynamically observe the effects of periodontal basic treatment on the proportion of spirochete in subgingival plaques and periodontal status.
动态观测牙周基础治疗对龈下菌斑中螺旋体百分组成及牙周临床指标的影响。
2·Objective To investigate the relationship between the peri-implant inflammation and the changes of subgingival microfloral.
目的了解种植体龈下菌群构成变化与种植体周围组织炎的关系。