【摘要】 目的 :通过对根面龋菌斑微生物的定量分析 ,进一步了解根面龋的致龋机制。方法 :19例根面龋患者 ,根据临床表现分为活动性和非活动性龋 ,对其根面龋的菌斑微生物进行菌落计数。结果 :无论活动性还是非活动性根面龋 ,厌氧菌都有较高的检出率 ,活动性根面龋检出率更高 ,活动性根面龋中链球菌总菌、变链菌、放线菌和乳杆菌检查率稍高 ,在非活动性根面龋中韦永氏菌和新月单胞菌的检出率稍高。梭杆菌及类杆菌 (包括紫质单胞菌、普氏菌、脆弱类杆菌 )检出率二者相似。活动性根面龋的各菌菌落计数均多于非活动性根面龋 ,差别最明显的是变形链球菌和放线菌。结论 :变形链球菌 ,放线菌是根面龋由非活动性到活动性转变的优势菌更多还原

【Abstract】 Objective:To explore the major pathognic bacteria of root caries.Method:19 people with root caries were studied ,the plaque samples of active and arrested root caries surfaces were analysed quantitative.Result:The detectable rate of anaerobic genera is higher both in active and arrested root caries surfaces .The dectectable rate of S.mutans,Actinomyces,Lactobacillus and their amount against total streptococci of active arrested root caries are significantly higher than the arrested root caries lesions.Conclusion:S.mutans and Actinomyces may be major pathogenic factors for the tuming of arrested root caries to active lesions.更多还原