牙体牙髓牙周病学杂志
牙體牙髓牙週病學雜誌
아체아수아주병학잡지
CHINESE JOURNAL OF CONSERVATIVE DENTISTRY
2014年
10期
586-591
,共6页
张富华%姚莉莉%张建凤%何爱民
張富華%姚莉莉%張建鳳%何愛民
장부화%요리리%장건봉%하애민
1 6 S rRN A%细菌%根管治疗失败
1 6 S rRN A%細菌%根管治療失敗
1 6 S rRN A%세균%근관치료실패
16S ribosomal RNA%bacteria%endodontic treatment failure
目的:基于16S rRNA,构建治疗失败根管内微生物的16S rRNA基因文库,并通过分子生物学方法分析其微生物的多样性。方法:选取经完善根管治疗2年后失败的患牙20例,根管内取样提取细菌DNA;然后用PCR扩增细菌16S rRNA基因,并构建其基因文库;最后通过测序比对构建系统发育树以确定微生物种类。结果:PCR检测显示,所有样本中有细菌出现;20个样本中共发现15种不同的系统发育型细菌(phlylotype),分属4个细菌门(phylum):厚壁菌门(Firmicutes)、变异菌门(Proteobacteria)、拟杆菌门(Bacte-roidetes)、放线菌门(Actinobacteria);每个样本中检出1~6种不同的细菌系统发育型,平均每个样本中可检测到2.7种;在检出的15种细菌中,以粪肠球菌(Enterococcus faecali)的出现频次最高(60%,12/20),微小消化链球菌(Peptostreptoccus micros)次之(40%,8/20),而另外13种细菌的出现频次较低,其中有4种系统发育型细菌(Rummeliibacillus、Exiguobacterium aurantiacum、Pseudomonas veronii、phocaeicola abscessus )只出现了1次。结论:根管治疗失败主要是由多种细菌感染所致,其中以粪肠球菌的检出率最高。
目的:基于16S rRNA,構建治療失敗根管內微生物的16S rRNA基因文庫,併通過分子生物學方法分析其微生物的多樣性。方法:選取經完善根管治療2年後失敗的患牙20例,根管內取樣提取細菌DNA;然後用PCR擴增細菌16S rRNA基因,併構建其基因文庫;最後通過測序比對構建繫統髮育樹以確定微生物種類。結果:PCR檢測顯示,所有樣本中有細菌齣現;20箇樣本中共髮現15種不同的繫統髮育型細菌(phlylotype),分屬4箇細菌門(phylum):厚壁菌門(Firmicutes)、變異菌門(Proteobacteria)、擬桿菌門(Bacte-roidetes)、放線菌門(Actinobacteria);每箇樣本中檢齣1~6種不同的細菌繫統髮育型,平均每箇樣本中可檢測到2.7種;在檢齣的15種細菌中,以糞腸毬菌(Enterococcus faecali)的齣現頻次最高(60%,12/20),微小消化鏈毬菌(Peptostreptoccus micros)次之(40%,8/20),而另外13種細菌的齣現頻次較低,其中有4種繫統髮育型細菌(Rummeliibacillus、Exiguobacterium aurantiacum、Pseudomonas veronii、phocaeicola abscessus )隻齣現瞭1次。結論:根管治療失敗主要是由多種細菌感染所緻,其中以糞腸毬菌的檢齣率最高。
목적:기우16S rRNA,구건치료실패근관내미생물적16S rRNA기인문고,병통과분자생물학방법분석기미생물적다양성。방법:선취경완선근관치료2년후실패적환아20례,근관내취양제취세균DNA;연후용PCR확증세균16S rRNA기인,병구건기기인문고;최후통과측서비대구건계통발육수이학정미생물충류。결과:PCR검측현시,소유양본중유세균출현;20개양본중공발현15충불동적계통발육형세균(phlylotype),분속4개세균문(phylum):후벽균문(Firmicutes)、변이균문(Proteobacteria)、의간균문(Bacte-roidetes)、방선균문(Actinobacteria);매개양본중검출1~6충불동적세균계통발육형,평균매개양본중가검측도2.7충;재검출적15충세균중,이분장구균(Enterococcus faecali)적출현빈차최고(60%,12/20),미소소화련구균(Peptostreptoccus micros)차지(40%,8/20),이령외13충세균적출현빈차교저,기중유4충계통발육형세균(Rummeliibacillus、Exiguobacterium aurantiacum、Pseudomonas veronii、phocaeicola abscessus )지출현료1차。결론:근관치료실패주요시유다충세균감염소치,기중이분장구균적검출솔최고。
AIM:To assess microbial diversity in root-well-filled teeth associated with failed endodontic treatment.METHODS:DNA was extracted from 20 root-canal-treated teeth with post-treatment apical periodontitis, the 16S rRNA of all present bacteria was amplified by PCR,followed by cloning and sequencing of the 16S rRNA ampl-icons.RESULTS:Bacteria were present in all cases.15 phylotypes belonging to 4 phyla were found in 423 clones;a mean of 2.7 phylotypes were identified in each sample (range 1 ~6).Enterococcus faecali (60%,12/20)and pep-tostreptoccus micros (40%,8/20)were the prevalent species.The other 13 species were found in a few cases respec-tively,rummeliibacillus,exiguobacterium aurantiacum,pseudomonas veronii,phocaeicola abscessus were respectively de-tected in one patient.CONCLUSION:A high diversity of the microbial flora is associated with endodontic treatment failures.Enterococcus faecali is the most frequently identified species by 16S rRNA gene clone library analysis.