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임플란트 주위 치주낭 내의 Porphyromonas gingivalis 섬모유전형의 출현율

Prevalence of fimA Genotypes of Porphyromonas gingivalis Strains in peri-implant sulcus

정종혁|권영혁|박준봉|허익|서동건
대한치주과학회 (The Korean Academy Of Periodontology)|2005.12|Journal of Periodontal & Implant Science|제35권 제4호|pp. 907-920

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참고문헌

주제분류치의학

초록

Abstract

Porphyromonas gingivalis is a gram negative, black-pigmented anaerobe, associated with periodontitis & peri-implantitis. Fimbriae(fimA) of P. gingivalis are filamentous components on the cell surface and important in the colonization and invasion of periodontal tissue. But all P. gnigivalis strains don't have equal pathogenicity, inequality among strains originates from different fimA genotype. P. gnigivalis fimA gene encoding fimbrillin(structural subunit of fimbriae) has been classified into 5 genotypes(typesⅠ to Ⅴ) based on the nucleotide sequences. In the present study, we examined the prevalence of these fimA genotypes in patients with dental implant and the relationship between prevalence of these genotypes and a condition of peri-implant tissue. Dental plaque specimens obtained from 189 peri-implant sulci of 97 patients with dental implants were analyzed by 16S rRNA fimA gene-directed PCR assay.P. gingivalis were detected in 86.2% of the alll samples. Among the P. gingivalis-positive samples, a significant difference in the occurrence of typeⅡ was observed between test and the two control groups. In two control groups, typeⅡ fimA were detected in 6.3%(PD<5㎜/BOP-), 18.7%(PD<5㎜/BOP+). In the test group(PD≧5㎜/BOP+), typeⅡ fimA genotype were detected most frequently in 50.0% . And a correlation between specific fimA types and peri-implantitis was found in typeⅡ(R2=1.105). These results suggest that P. gingivalis strains that possess typeⅡ fimA are gradually increased, as a condition of peri-implant tissue is getting complicated and are closely associated with peri-implant health status. We speculate that these organisms be involved in peri- implantitis

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