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European Archives of Paediatric Dentistry

, Volume 10, Supplement 1, pp 43–45 | Cite as

In vitro evaluation of the abrasiveness of acidic dentifrices

  • K. M. Alves
  • J. P. Pessan
  • M. A. Buzalaf
  • A. C. DelbemEmail author
Short Communication

Abstract

AIM: This in vitro study evaluated the abrasiveness of acidic fluoride (F) dentifrices with different F concentrations on bovine enamel. METHODS: Enamel blocks (4.0x4.0 mm2, n=120) were selected according to their surface microhardness and divided into 12 groups. Slurries of dentifrices were used containing 0 (placebo), 275, 412, 550 and 1,100 ppm F (pH 4.5 or 7.0), as well as testing two commercial dentifrices (Crest™, positive control, 1,100 ppm F and Colgate Baby™, 500 ppm F). Enamel blocks were partially protected with an adhesive tape (control area) and then brushed by an automated toothbrushing machine (16,000 strokes). During this process, 0.4 ml of the slurries were injected every 2 mins on the enamel blocks. After toothbrushing, enamel wear was determined by profilometry. STATISTICS: Results were analyzed by ANOVA and Tukey’s test (p<0.05). RESULTS: The mean values for pH in the suspensions during treatment were 6.93, 4.32, 7.56 and 8.19 for neutral experimental dentifrices, acidic experimental dentifrices, Crest™ and Colgate Baby™, respectively. The abrasiveness of the acidic dentifrices was similar (p>0.05) to the neutral ones, whereas commercial dentifrices yielded lower abrasion (p<0.05). CONCLUSION: It was concluded that a reduction of the pH of dentifrices does not increase their abrasiveness.

Key words

dentifrice acidic abrasive 

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Copyright information

© Adis International 2009

Authors and Affiliations

  • K. M. Alves
    • 1
  • J. P. Pessan
    • 1
  • M. A. Buzalaf
    • 1
  • A. C. Delbem
    • 1
    Email author
  1. 1.Aragatuba Dental SchoolSäo Paulo State University and Bauru Dental School, University of Säo PauloAraçatubaBrazil

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