Topical fluoride application is able to reduce acid susceptibility of restorative materials.
This study aimed to investigate the effect of topical fluoride application on the acid susceptibility of restorative materials. Four restorative materials were investigated in this study: 2 composite resins (Tetric EvoCeram and Filtek Silorane), a polyacid-modified resin composite (Dyract Extra), and a conventional glass-ionomer cement (Ketac Fil Plus). The samples were treated once with 1 of 8 different fluoride solutions (TiF4, NaF, AmF, and SnF2, each at native pH or pH 4) for 3 min or remained untreated (control). The samples were then eroded by citric acid (pH 2.6) for 5 days (6×1 min daily). Erosive substance loss, surface topographic and compositional changes were investigated using surface profilometry, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS), respectively, after fluoride pretreatment and after erosion. The results indicate high-concentrated AmF solution at native pH was effective in inhibiting erosion in the conventional glass-ionomer cement and polyacid-modified resin composite.
Department of Prosthodontics, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China.
Hao
H
Yu
Wolfgang
W
Buchalla
Hui
H
Cheng
Annette
A
Wiegand
Thomas
T
Attin
D019343:Citric Acid; D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003343:Corrosion; D003793:Dental Restoration, Permanent / Q000379:methods*; D005459:Fluorides; D005460:Fluorides, Topical; D005899:Glass Ionomer Cements / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D012117:Resins, Synthetic / Q000737:chemistry*; D062047:Silorane Resins / Q000737:chemistry; D012969:Sodium Fluoride; D013052:Spectrometry, X-Ray Emission; D014002:Tin Fluorides; D014025:Titanium
D020770:Compomers; D003188:Composite Resins; D005460:Fluorides, Topical; D005899:Glass Ionomer Cements; D012117:Resins, Synthetic; D062047:Silorane Resins; D014002:Tin Fluorides; C094808:amine fluoride solution; D019343:Citric Acid; D012969:Sodium Fluoride; D014025:Titanium; D005459:Fluorides; C032240:titanium tetrafluoride