Effect of High-Fluoride Dentifrice on Enamel Erosion Adjacent to Restorations In Vitro.
OBJECTIVE
This in vitro study analyzed the antierosive potential of a high-fluoride dentifrice on enamel adjacent to restorations.


METHODS
Enamel blocks (6 × 6 × 3 mm) from bovine incisor teeth were restored with three different restorative materials (resin, conventional glass ionomer cement, and resin-modified glass ionomer cement) and treated with dentifrices containing 0, 1100, or 5000 ppm F. After restorative procedures, initial surface Vickers hardness of the blocks were obtained. The specimens were submitted to pH cycles (4 × 90 seconds in soft drink) and treatments for five days. Between the challenges and overnight, the blocks remained in artificial saliva. At the end of the experiment, the final hardness was assessed and the percentage of surface mineral loss (%SML) was calculated. A 3 × 3 factorial design was used to conduct statistical analysis. Data were analyzed by analysis of variance and t-test, with significance level fixed at 5%.


RESULTS
High-fluoride dentifrice decreased demineralization caused by erosive challenge regardless of the restorative material used (p<0.001). Likewise, the blocks restored with conventional glass ionomer cement showed lower values of SML irrespective of dentifrice used (p<0.001).


CONCLUSIONS
Use of a high-fluoride dentifrice on teeth restored with conventional glass ionomer cement offers additional protection against enamel erosion.
F G
FG
Rolim
A F
AF
Sá
G W L
GW
Silva-Filho
A de S
Ade S
Brandim
G C
GC
Vale
D000818:Animals; D002417:Cattle; D003188:Composite Resins / Q000737:chemistry; D003743:Dental Enamel / Q000187:drug effects*; D003793:Dental Restoration, Permanent / Q000379:methods*; D003802:Dentifrices / Q000737:chemistry*; D005460:Fluorides, Topical / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry; D006244:Hardness; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D008422:Materials Testing; D013499:Surface Properties; D014077:Tooth Erosion / Q000517:prevention & control*
D003188:Composite Resins; D003802:Dentifrices; D005460:Fluorides, Topical; D005899:Glass Ionomer Cements