摘要目的探讨老年人根面龋的有关致龋菌.方法收集60～77岁有根面龋与无根面龋受试者菌斑标本,接种选择与非选择培养基.培养分离后,对总菌、产黑色素菌、链球菌、变形链球菌、放线菌、乳酸杆菌的菌数及检出率进行比较分析.结果试验组总菌、链球菌、放线菌、乳酸杆菌数及其放线菌、乳酸杆菌的检出率均比对照组高.结论放线菌和乳酸杆菌可能是老年人根面龋的主要相关致病菌.

abstractsAbstract:Objective To study the pathogen of root surface caries in the elderly. Methods Plaque samples from the experimental group and the control group were collected. After culturing in selective and non-selective media, the different bacteria were isolated. The counts and the positive rates of total bacteria, porphyromonas group, pervotella group, streptococcus mutants group, actinomyces group and lactobacillus group were compared.Results The counts of total bacteria, streptococcus mutants, actinomyces and lactobacillus of the experimental group were higher than those of the control group. The positive rates of actinomyces and lactobacillus of the experimental group were significantly higher than those of the control group. Conclusion Actinomyces and lactobacillus are the main related pathogens of root surface caries in the elderly.