慢性牙周病患者龈下菌斑的厌氧和需氧菌群总数分布研究

目的研究慢性牙周病患者龈下菌斑的菌群总数分布状况．方法采用定量厌氧和需氧培养方法分别观测慢性牙周病患者和健康人的龈下菌斑菌群分布．结果慢性牙周病患者龈下菌斑的厌氧菌总数明显高于健康组（P〈0．05），并以牙龈卟啉菌和黑色普氏菌为主，其次是伴放线菌和小韦荣氏菌．结论牙周病患者龈下菌斑的厌氧和需氧菌群数量明显升高，牙龈卟啉菌和黑色普氏菌与牙周炎密切相关．

Flore Distribution in the Subgingival Plaque of Patients with Chronic Periodontitis

Objective To study the flore distribution in subgingival plaque of patients with chronic periodontitis. Methods The subgingival plaque of chronic periodontitis patients and healthy people were quantitively cultivated for aerobe and anaerobe. Results There were obvious differences in total amount anaerobe between periodontitis patients and healthy people （P 〈 0.05 ）. The main anaerobes on subgingival flore were porphyromonas gingivalis （8.18 ± 0.62） and prevotella nigrescens （8.09 ± 0.54）, then was actinobacillus actinomycetemcomitand （7.91 ± 0.59）and veillonella parvula （7.66 ±1.13 ）. Conclusions The porphyromonas gingivalis and prevotella nigrescens are related with periodontitis. The total bacteria in subgingival plaque of patients with periodontitis in crease significantly.