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- 2016
高龋无龋儿童乳牙牙菌斑的微生物差异
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Abstract:
摘要 目的:探讨高龋儿童和无龋儿童的乳牙牙菌斑中微生物种类的差异。方法:选取符合WHO取样标本的3名高龋儿童和3名无龋儿童,每个高龋儿童取唇颊侧、舌侧和病损区菌斑3份,每个无龋儿童取唇颊侧和舌侧2份,提取全基因组DNA,行16SrDNA V1-V2区PCR扩增并构建文库,454焦磷酸测序。所得序列进行一系列处理后利用RDP分类器进行分类,并进行统计分析,比较高龋无龋儿童乳牙牙菌斑的微生物的不同。结果:牙菌斑的15份样本共得到324262条序列,每个样本平均约含有21617条序列,每条序列平均约长268bp;在高龋儿童中,唇颊侧组、舌侧组以及病损区组3组之间比较差异具有统计学意义(P＜0.05)的5个菌属是链球菌属(Streptococcus)、丙酸杆菌属(Propionibacterium)、棒状杆菌属(Corynebacterium)、纤毛菌属(Leptotrichia)、乳杆菌属(Lactobacillus);高龋组与无龋组比较差异具有统计学意义(P＜0.05)的5个菌属是链球菌属(Streptococcus)、栖热菌属(Thermus)、产丝菌属(Filifactor)、Solobacterium、短芽孢杆菌属(Brevibacillus)。结论:牙菌斑微生物的检出率在高龋和无龋儿童中存在差异
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