Inhibition of mineral loss at the enamel/sealant interface of fissures sealed with fluoride- and non-fluoride containing dental materials in vitro.
OBJECTIVE
In this in vitro study we evaluated the enamel mineral loss effect of fluoride-containing and non-fluoride-containing materials at different distances from the sealant margin, and verified the fluoride-releasing capability of these materials.


METHODS
Extracted molars were randomly assigned into nine groups (n = 12): Concise (C), FluroShield (F), Helioseal Clear Chroma (H), Vitremer (V), Fuji II-LC (FII), Ketac Molar (KM), Fuji IX (FIX), Single Bond (SB), and Clearfil Protect Bond (CF). All groups were subjected to thermo and pH cycling. Enamel mineral loss was evaluated by cross-section micro-hardness analysis at distances: -100 microm, 0 microm, 100 microm, 200 microm. The mineral loss data were analyzed using a multi-factor ANOVA with split-plot design, and fluoride-released data were submitted to ANOVA and Tukey tests.


RESULTS
FIX demonstrated a lower mineral loss than C, F, and H, but did not differ from the SB, CF, V, FII, and KM groups, which also demonstrated no difference among them. C, F, H, and V presented the highest mineral loss, with no difference among them. V did not differ from the other groups (p > 0.05). Regarding the different distances from the sealant margin, -100 microm presented the lowest mineral loss. FIX showed the highest fluoride release on the 7th and 14th days of evaluation, while CF showed high fluoride release only on the 7th day.


CONCLUSIONS
Resin sealant did not prevent enamel mineral loss, contrary to glass-ionomer cement, which showed the highest capacity for fluoride release. It is not exclusively the presence of fluoride in a material's composition that indicates its capability to interfere with the development of enamel caries-like lesions.
Kantovitz
Kamila Rosamilia
KR
Pediatric Dentistry Area, Department of Pediatric Dentistry, Piracicaba Dental School, UNICAMP, Piracicaba, SP, Brazil.
Pascon
Fernanda Miori
FM
Correr
Gisele Maria
GM
Borges
Ana Flávia Sanches
AF
Uchôa
Marinês Nobre Dos Santos
MN
Puppin-Rontani
Regina Maria
RM
D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry / Q000627:therapeutic use; D002327:Cariostatic Agents / Q000737:chemistry / Q000627:therapeutic use*; D003188:Composite Resins / Q000737:chemistry / Q000627:therapeutic use; D001840:Dental Bonding; D003743:Dental Enamel / Q000187:drug effects* / Q000473:pathology; D017220:Dentin-Bonding Agents / Q000737:chemistry / Q000627:therapeutic use; D005459:Fluorides / Q000737:chemistry / Q000627:therapeutic use*; D005899:Glass Ionomer Cements / Q000737:chemistry / Q000627:therapeutic use; D006244:Hardness; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D010895:Pit and Fissure Sealants / Q000737:chemistry / Q000627:therapeutic use*; D011140:Polyurethanes / Q000737:chemistry / Q000627:therapeutic use; D012117:Resins, Synthetic / Q000737:chemistry / Q000627:therapeutic use; D013499:Surface Properties; D017001:Tooth Demineralization / Q000517:prevention & control*
D002327:Cariostatic Agents; C503075:Clearfil Protect Bond; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D010895:Pit and Fissure Sealants; D011140:Polyurethanes; D012117:Resins, Synthetic; C084550:Vitremer; C110713:fuji IX; C110712:ketac-molar; C115612:single bond; C059908:Helioseal; C086661:Fluoroshield; D017438:Bisphenol A-Glycidyl Methacrylate; D005459:Fluorides