Microbial flora associated with presence of root surface caries in periodontally treated patients

Emilson, Claes‐Göran; Klock, Björn; Sanford, Collin

doi:10.1111/j.1600-0722.1988.tb01406.x

Cited by 33 publications

(51 citation statements)

References 30 publications

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“…in plaque from sound and exposed root surfaces or in infected dentine from carious lesions as, overall, they represented approximately 10% of the flora. These observations support those in previous reports [Emilson et al, 1988;Brown et al, 1986;Keltjens et al, 1987;Fure, 1987] that the proportions of A. naeslundii were not significantly different in plaque from sound and exposed root surfaces and carious lesions. The proportion of A. naeslundii found here is also very similar to the proportion (12.8 5.8%) reported by Schüpbach et al [1995].…”

Section: Discussionsupporting

confidence: 83%

“…There are conflicting reports of the composition of the microflora associated with sound and diseased root surfaces; some studies [Brown et al, 1986;Keltjens et al, 1987] have found no significant difference between bacterial populations whereas others [Fure et al, 1987;Emilson et al, 1988] reThe Isolation of Actinomyces naeslundii from Sound Root Surfaces and Root Carious Lesions Caries Res 1998;32:100-106 101 ported significantly greater proportions of Actinomyces spp. and Streptococcus sanguis on sound and exposed root surfaces.…”

Section: Introductionmentioning

confidence: 99%

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The Isolation of Actinomyces naeslundii from Sound Root Surfaces and Root Carious Lesions

1998

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The isolation of Actinomyces naeslundii from sound, exposed root surfaces (n = 56) and soft and leathery root carious lesions (n = 71) was investigated. Root carious lesions were sampled after the removal of overlying plaque. Supragingival plaque or carious dentine was sampled using a sterile excavator, the samples were disaggregated and cultured on both selective and non-selective media. A. naeslundii isolates were identified to the genospecies using specific antisera. Significantly greater numbers and proportions of A. naeslundii genospecies 2 than A. naeslundii genospecies 1 were isolated from all sites sampled. There was no significant difference between the numbers and proportions of the two genospecies isolated from leathery and soft lesions. The relationship between the presence of A. naeslundii genospecies and aciduric and acidogenic organisms was investigated. Those sound exposed root surfaces from which A. naeslundii genospecies 1 and/or 2 were isolated yielded significantly lower numbers of lactobacilli and yeasts than the surfaces from which A. naeslundii were not isolated. This difference was also found in leathery lesions but not soft root carious lesions. The microflora of soft root carious lesions was found to comprise primarily gram-positive pleomorphic rods which formed 70±7.8% of the flora, while in plaque from exposed root surfaces and in infected dentine from leathery lesions the gram-positive pleomorphic rods represented only 35% of the flora.

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Section: Discussionsupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

The Isolation of Actinomyces naeslundii from Sound Root Surfaces and Root Carious Lesions

1998

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“…Since the present study was not undertaken to determine the composition of the plaque microflora sampled from sites with or without root surface lesions, as reported previously [Ellen et al" 1985b;Brown et al. 1986;Fure et al, 1987;Emilson et al. 1988], we cannot compare our results with others.…”

Section: Discussionmentioning

confidence: 50%

“…are associated with root surface caries [Ellen et al., 1985a, b;Brown et al. 1986; Fure et al, 1987; Keltjens et al., 1987;Emilson et al, 1988]. The main focus of these studies was to determine the composition of the plaque overlying the carious lesion and hence no attempts were made to localize specific microorganisms within the ca rious lesions.…”

mentioning

confidence: 99%

A Quantitative Comparison of Selected Bacteria in Human Carious Dentine by Microscopic Counts

Ozaki¹,

Matsuo²,

Nakae³

et al. 1994

Caries Res

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The levels of selected cariogenic and obligately anaerobic bacteria have been compared in carious dentine taken from fissures, smooth surfaces, and root surfaces. The numbers of infected dentinal tubules were determined by immunohistological staining using species-specific antisera against selected bacteria. Selective localization was observed; mutans streptococci were the predominant bacteria in dentine from fissures and smooth surface coronal caries, but not from root surface caries. The proportion of mutans streptococci was higher in the shallow and middle layers of dentine from fissures and smooth surface coronal carious lesions than from the deep layers. In root surface caries, Actinomyces spp. were the predominant bacteria, and were present at higher levels in the deep layer of root lesions than in the shallow and middle layers. The proportion of Lactobacillus spp. was relatively low despite its high detection frequency in all layers of the three types of carious lesion. Immunohistological staining with species-specific antisera was able to reveal the distribution and the localization of various bacteria in carious dentine.

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“…Mutans streptococci have been implicated in the etiology of human root surface caries, whereas there is no evidence of Actinomyces playing a significant role [Ellen et al, 1985;Brown et al, 1986;Keltjens et al, 1987;Fure et al, 1987;Emilson et al, 1988], Treat ment with chlorhexidine gel considerably reduces the number of mutans streptococci in plaque and saliva in subjects with high levels of these microorganisms [Emilson 1977a[Emilson , 1981Maltz et al, 1981;Schaeken et al, 1984Schaeken et al, , 1986. In most cases, however, the micro organisms reappear and reach pretreatment levels within 2-5 months.…”

mentioning

confidence: 99%

Effect of Chlorhexidine Gel Treatment Supplemented with Chlorhexidine Varnish and Resin on Mutans Streptococci and Actinomyces on Root Surfaces

Fure¹,

Emilson²

1990

Caries Res

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The supplementary effect of chlorhexidine varnish and resin on the reappearance of mutans streptococci and Actinomyces spp. on root surfaces after chlorhexidine gel treatment was studied. In 8 subjects with many restored tooth and exposed root surfaces, highly colonized with mutans streptococci, chlorhexidine varnish and resin were applied to the teeth on one side of the mouth and resin alone to the other side. This treat ment significantly prolonged the time period of reduced salivary levels of mutans streptococci when added to a preceding period of chlorhexidine gel treatment. In 3 of the 8 subjects, mutans streptococci were undetected for more than 4 weeks after treatment. There was a significant difference between the chlorhexidine varnish/resin side and the resin side for 5 weeks with regard to the mean numbers of mutans streptococci in root surface plaque, whereas for the Actinomyces spp. no significant differences were found. In 2 subjects harboring both Streptococcus mutans and S. sobrinus, the population of S. sobrinus reppeared more readily in saliva and plaque than S. mutans. The chlorhexidine treatment was less effective in suppressing the population of Actinomyces viscosus/naeslundii than the mutans streptococci.

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Microbial flora associated with presence of root surface caries in periodontally treated patients

Cited by 33 publications

References 30 publications

The Isolation of Actinomyces naeslundii from Sound Root Surfaces and Root Carious Lesions

The Isolation of Actinomyces naeslundii from Sound Root Surfaces and Root Carious Lesions

A Quantitative Comparison of Selected Bacteria in Human Carious Dentine by Microscopic Counts

Effect of Chlorhexidine Gel Treatment Supplemented with Chlorhexidine Varnish and Resin on Mutans Streptococci and Actinomyces on Root Surfaces

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