42845
document
Effects of fluoride and chlorhexidine on the microflora of dental root surfaces and progression of root-surface caries . The effects of fluoride and chlorhexidine varnishes on the microflora of dental root surfaces and on the progression of root-surface caries were studied . Forty-four patients , surgically treated for advanced periodontal disease , were distributed at random among three groups . All patients received a standardized preventive treatment . Furthermore , the dentition of the patients in the two experimental groups was treated , at three-month intervals , with chlorhexidine and fluoride varnish , respectively . Patients in the control group received no additional treatment . In the experimental groups , plaque samples were collected from selected sound and carious root surfaces at baseline and at three , six , and nine months after the onset of the study . The presence of root-surface caries was scored at baseline and after one year . In addition , the texture , depth , and color of the root-surface lesions were monitored . Mutans streptococci on root surfaces were suppressed significantly ( p less than 0.05 ) during the whole experimental period in the chlorhexidine varnish group , but not in the fluoride varnish group . A non-significant increase in the number of Actinomyces viscosus/naeslundii was noted after treatment with chlorhexidine and fluoride varnish . The increase in the number of decayed and filled root surfaces after one year was significantly lower in the experimental groups than in the control group . After treatment with chlorhexidine varnish , significantly more initial root-surface lesions had hardened than in the other groups .
42846
Intervention_Pharmacological
fluoride
42847
Intervention_Pharmacological
chlorhexidine
42848
Intervention_Pharmacological
fluoride
42849
Intervention_Pharmacological
chlorhexidine
42850
Intervention_Pharmacological
chlorhexidine
42851
Intervention_Pharmacological
fluoride
42852
Intervention_Control
control group
42853
Intervention_Pharmacological
chlorhexidine
42854
Intervention_Pharmacological
fluoride
42855
Intervention_Pharmacological
chlorhexidine
42856
Intervention_Pharmacological
fluoride
42857
Intervention_Pharmacological
chlorhexidine
42858
Outcome_Physical
microflora of dental root surfaces
42859
Outcome_Physical
Mutans streptococci on root surfaces were suppressed
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Outcome_Physical
increase in the number of Actinomyces viscosus/naeslundii
42861
Outcome_Physical
increase in the number of decayed and filled root surfaces
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Outcome_Physical
initial root-surface lesions had hardened
42863
Participant_Condition
Forty-four patients , surgically treated for advanced periodontal disease