title: In vitro enamel remineralization by low-fluoride toothpaste with calcium citrate and sodium trimetaphosphate.
abstract: The objective of this study was to evaluate in vitro the effect of a low fluoride toothpaste (450 µgF/g, NaF) combined with calcium citrate (Cacit) and sodium trimetaphosphate (TMP) on enamel remineralization. Bovine enamel blocks had the enamel surface polished sequentially to determine the surface hardness. After production of artificial carious lesions, the blocks selected by their surface hardness were submitted to remineralization pH cycling and daily treatment with dentifrice suspensions (diluted in deionized water or artificial saliva): placebo, 275, 450, 550 and 1,100 µgF/g and commercial dentifrice (positive control, 1,100 µgF/g). Finally, the surface and cross-section hardness was determined for calculating the change of surface hardness (%SH) and mineral content (%∆Z). Fluoride in enamel was also determined. The data from %SH, %∆Z and fluoride were subjected to two-way analysis of variance followed by Student-Newman-Keuls's test (p<0.05). The mineral gain (%SH and %∆Z) was higher for toothpastes diluted in saliva (p<0.05), except for the 450 µgF/g dentifrice with Cacit/TMP (p>0.05). The 450 Cacit/TMP toothpaste and the positive control showed similar results (p>0.05) when diluted in water. A dose-response was observed between fluoride concentration in toothpastes and fluoride present in enamel, regardless of dilution. It was concluded that it is possible to enhance the remineralization capacity of low F concentration toothpaste by of organic (Cacit) and inorganic (TMP) compounds with affinity to hydroxyapatite.
authors: Center for Biological and Health Sciences, State University of West of Paraná, Cascavel, PR, Brazil.
authors: Edo
authors: E
authors: Hirata
authors: Marcelle
authors: M
authors: Danelon
authors: Isabelle Rodrigues
authors: IR
authors: Freire
authors: Alberto Carlos Botazzo
authors: AC
authors: Delbem
mesh_terms: D000818:Animals; D019355:Calcium Citrate / Q000494:pharmacology*; D002327:Cariostatic Agents / Q000008:administration & dosage / Q000494:pharmacology*; D002417:Cattle; D003731:Dental Caries / Q000503:physiopathology; D003743:Dental Enamel / Q000737:chemistry / Q000187:drug effects*; D003802:Dentifrices / Q000032:analysis / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D005459:Fluorides / Q000008:administration & dosage / Q000032:analysis / Q000494:pharmacology*; D006244:Hardness; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D008903:Minerals / Q000032:analysis; D010919:Placebos; D011122:Polyphosphates / Q000494:pharmacology*; D012464:Saliva, Artificial / Q000737:chemistry; D014089:Tooth Remineralization / Q000379:methods*; D014867:Water / Q000737:chemistry
chemical_list: D002327:Cariostatic Agents; D003802:Dentifrices; D008903:Minerals; D010919:Placebos; D011122:Polyphosphates; D012464:Saliva, Artificial; D014867:Water; C009293:trimetaphosphoric acid; D019355:Calcium Citrate; D005459:Fluorides