Friday, March 23, 2012: 2 p.m. - 3:15 p.m.
Presentation Type: Poster Session
This abstract is based on research that was funded entirely or partially by an outside source:
sealants may have additional anticariogenic
are concerns about the adhesion and retention of these sealants on enamel. Objective :
to test enamel microtensile bonding strength (MTBS)
of experimental and commercial antibacterial
and fluoride-releasing sealants. Methods :
Two experimental antibacterial fluoride-releasing sealants (Exp-1 and Exp-2)
were formulated using synthesized antibacterial
fluoride-releasing monomer and other dental monomers
(BisGMA/EBPADMA/HDDMA/EGDMA) and fluoride-releasing filler (Caulk/Dentsply).
Exp-2 also contains 15% NovaMin
bioactive glass particles (GlaxoSmithKline).
Two commercial fluoride-releasing sealants [FluroShield (FS)
(Caulk/Dentsply), Clinpro (CP)
(3M-ESPE)] and an antibacterial non-F-releasing sealant
SeLECT Defense (E34) (Element
34 Technology) were also included. Twenty extracted molar teeth were
divided into 5 groups (n=4),
ground with 600-grit SiC papers
to expose flat enamel. The specimens
were etched with 37% phosphoric acid gel
for 15 seconds, rinsed, and dried. The sealants were
applied and light cured 20s.
Filtek Supreme Plus composite (3M ESPE) was
placed on cured sealant, cured
for 40s, and
built up incrementally to 4-5mm.
The samples were stored in
DI-water for 24h
at 37◦C, then sectioned into bar specimens (1x1mm
cross-section). For each group,
15 specimens were tested on microtensile tester for MTBS. The remaining 15
specimens were thermocycled
5-55◦C for 1000
cycles and then tested for MTBS. The data were
analyzed using ANOVA
and Tukey test. A
paired t-test was used to compare the mean
MTBS under different
1. Microtensile Bonding Strength (Mean±SD)
groups with the same superscript latter have no significant difference
(p>0.05). There is no significant difference among all groups after
thermocycles and between 24h and thermocycles.
Conclusion : the experimental and
and fluoride-releasing sealants have
similar bonding strengths to enamel (Supported by NIH/NIDCR grant 5R01DE019203-03)
Keywords: Adhesion, Enamel, Fluoride and Sealants