An in situ investigation into the abrasion of eroded dental hard tissues by a whitening dentifrice.
This crossover study aimed to investigate abrasion of previously eroded hard dental tissues by a whitening dentifrice compared to a regular dentifrice. After a 3-day lead-in period, 14 volunteers were randomly assigned to use one of the toothpastes while wearing a removable appliance, containing 3 enamel and 3 root dentine slabs on each side. On the first day salivary pellicle was allowed to form. Twice daily for the following 3 days, one side of each appliance was immersed in an acidic carbonated drink ex vivo while the other side remained unexposed. Specimens were then brushed with the allocated dentifrice. After a 3-day washout period, new sets of enamel and dentine slabs were mounted in the appliances and the participants commenced period 2 using the alternative toothpaste. Acid-treated specimens always showed more wear than untreated specimens. The whitening dentifrice did not significantly increase the wear of softened enamel compared with the regular dentifrice. Brushing with the whitening toothpaste led to significantly greater wear of sound enamel and of both eroded and sound dentine than the regular dentifrice. The results suggest that whitening dentifrices may not increase the wear of acid-softened enamel but may have a more deleterious effect on dentine than regular toothpastes.
Department of Restorative Dentistry, School of Dentistry of Piracicaba, State University of Campinas, Brazil.
C P
CP
Turssi
J J
JJ
Faraoni
A L
AL
Rodrigues
M C
MC
Serra
D000328:Adult; D000704:Analysis of Variance; D002253:Carbonated Beverages / Q000009:adverse effects; D002327:Cariostatic Agents / Q000627:therapeutic use; D018592:Cross-Over Studies; D003743:Dental Enamel / Q000187:drug effects / Q000473:pathology; D044622:Dental Pellicle / Q000187:drug effects / Q000473:pathology; D003802:Dentifrices / Q000009:adverse effects* / Q000627:therapeutic use; D003804:Dentin / Q000187:drug effects / Q000473:pathology; D005260:Female; D005459:Fluorides / Q000627:therapeutic use; D006801:Humans; D008297:Male; D010710:Phosphates / Q000627:therapeutic use; D012969:Sodium Fluoride / Q000627:therapeutic use; D014072:Tooth Abrasion / Q000139:chemically induced* / Q000473:pathology; D014073:Tooth Bleaching / Q000009:adverse effects*; D014077:Tooth Erosion / Q000150:complications*; D014092:Tooth Root / Q000187:drug effects / Q000473:pathology
D002327:Cariostatic Agents; D003802:Dentifrices; D010710:Phosphates; C012980:fluorophosphate; D012969:Sodium Fluoride; D005459:Fluorides