Evaluation of antibacterial and fluoride-releasing adhesive system on dentin--microtensile bond strength and acid-base challenge.
This study evaluated the influence of a fluoride-containing adhesive on microtensile bond strength (microTBS) to dentin, as well as analyzed the dentin-adhesive interface after acid-base challenge. Experimental groups were: G1--Clearfil SE Bond control (SE); G2--Clearfil Protect Bond control (PB); G3--Primer[SE]/Adhesive[PB]; G4--Primer[PB]/Adhesive[SE]. For microTBS evaluation, dentin surfaces were ground, bonded, and composite resin crowns were built up to obtain beams to be tested. For interfacial analysis, adhesive system was applied on dentin surface and a low-viscosity resin was placed between two dentin disks. Then, the specimens were subjected to acid-base challenge, sectioned, and polished to be observed by SEM. microTBS data showed no statistical differences among the groups (GI: 51.3, G2: 47.6, G3: 55.0, G4: 53.9; mean in MPa). Through SEM, it was observed that a thick acid-base resistant zone adjacent to the hybrid layer was created only when the fluoride-releasing adhesive was used. In conclusion, the presence of fluoride in an adhesive contributed significantly to preventing secondary caries, and did not interfere with dentin-adhesive bond strength.
Shinohara
Mirela Sanae
MS
Dental Materials Division, Department of Restorative Dentistry, Piracicaba School of Dentistry, State University of Campinas, SP, Brazil.
Yamauti
Monica
M
Inoue
Go
G
Nikaido
Toru
T
Tagami
Junji
J
Giannini
Marcelo
M
de Goes
Mario Fernando
MF
D000269:Adhesives / Q000737:chemistry*; D000704:Analysis of Variance; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000627:therapeutic use; D002327:Cariostatic Agents / Q000737:chemistry / Q000627:therapeutic use; D001840:Dental Bonding / Q000379:methods*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry / Q000627:therapeutic use; D006801:Humans; D018709:Statistics, Nonparametric; D013718:Tensile Strength
D000269:Adhesives; D000900:Anti-Bacterial Agents; D002327:Cariostatic Agents; D017220:Dentin-Bonding Agents; D005459:Fluorides