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document
Abrasive wear on eroded root dentine after different periods of exposure to saliva in situ . The effect of salivary exposure time on the abrasive wear of acid-eroded dentine was evaluated in situ . One-hundred and twenty bovine root dentine slabs were randomly assigned into six groups ( A-F ) and placed in intraoral palatal devices , which were worn by 10 volunteers for 4 d. On the first day , no erosive/abrasive procedures were carried out . On the following 3 d , erosive challenges were performed extraorally , two times per day , by immersing the device for 90 s in a soft drink . Subsequently , the group A specimens were immediately brushed ( 40 strokes ) , and the others were brushed after the following times : B , 20 min ; C , 40 min ; and D , 60 min . Group E specimens were only acid-eroded and those of group F were only brushed . Dentine wear was measured with a profilometer . anova and Dunnett 's test showed that groups A-D did not differ statistically from the control group E but differed from the control group F. The lowest mean value was found for group F. Regression analysis was unable to show salivary effect on dentine wear reduction . The data suggest that the exposure time of saliva of up to 60 min has no effect on reducing the eroded dentine wear by toothbrushing .
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Intervention_Physical
saliva
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Intervention_Physical
salivary
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Intervention_Physical
erosive challenges
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Intervention_Physical
salivary
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Outcome_Other
Abrasive wear
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Outcome_Other
abrasive wear
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Outcome_Other
Dentine wear
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Outcome_Other
dentine wear reduction
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Outcome_Other
eroded dentine wear
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Participant_Condition
eroded root dentine
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Participant_Condition
acid-eroded dentine
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Participant_Sample-size
One-hundred and twenty bovine root dentine slabs
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Participant_Sample-size
10