The erosive potential of 1% citric acid supplemented by different minerals: an in vitro study.
OBJECTIVE
The objective of the present in vitro study was to evaluate the effect of different minerals in combination with 1% citric acid on dental erosion.


METHODS
Ninety enamel samples were randomly allocated to nine groups (G1: pure 1% citric acid solution [control]; G2: with 1 mM Ca; G3: with 0.047 mM F; G4: with 1 mM Fe; G5: with 1 mM P; G6: with 1 mM Ca and 0.047 mM F; G7: with 1 mM Ca and 1 mM P; G8: with 1 mM Fe and 0.047 mM F; G9: with 1 mM Ca, 1 mM P, 0.047 mM F and 1.0 mM Fe). The samples were subjected to six pH cycles, each consisting of immersion in pure or modified 1% citric acid (1 min) followed by storage in artificial saliva (59 min). Enamel wear was assessed using profilometry.


RESULTS
Data were analysed using analysis of variance and Tukey test (P < 0.05). Enamel loss (mean + or - SD) amounted to between 0.87 + or - 0.30 and 1.74 + or - 0.74 microm but did not significantly differ among the groups.


CONCLUSIONS
The modification of 1% citric acid with different minerals did not have a protective effect on enamel erosion.
Magalhaes
Ana Carolina
AC
Department of Biological Sciences, Bauru School of Dentistry, USP-University of Sao Paulo, Al. Octavio Pinheiro Brisolla, 9-75, 17012-901 Bauru-SP, Brazil.
Moraes
Samanta Mascarenhas
SM
Rios
Daniela
D
Wiegand
Annette
A
Buzalaf
Marília Afonso
MA
D000704:Analysis of Variance; D000818:Animals; D002118:Calcium / Q000494:pharmacology; D002417:Cattle; D019343:Citric Acid / Q000009:adverse effects*; D003743:Dental Enamel / Q000187:drug effects*; D005459:Fluorides / Q000494:pharmacology; D007501:Iron / Q000494:pharmacology; D008903:Minerals / Q000494:pharmacology*; D010710:Phosphates / Q000494:pharmacology; D011897:Random Allocation; D018709:Statistics, Nonparametric; D014077:Tooth Erosion / Q000139:chemically induced*
D008903:Minerals; D010710:Phosphates; D019343:Citric Acid; D007501:Iron; D005459:Fluorides; D002118:Calcium