Influence of viscosity and polymerization mode on bond strength of dual-curing resin luting agent to dentin
Braz. j. oral sci
;
11(1): 76-80, jan.-mar. 2012. ilus
Article
in English
| LILACS, BBO
| ID: lil-638408
ABSTRACT
Aim:
To evaluate the influence of the viscosity and curing mode on the bond strength of two resincements to dentin.Methods:
Eight experimental groups were formed (n = 7) according to thedual-cure resin cements (Nexus 2 - Kerr Corp. and Variolink II - Ivoclar Vivadent), curing modes(dual-cure or self-cure) and viscosities (low and high). Resin cements were applied to pre-curedcomposite resin discs (2 mm thick, Sinfony -3M ESPE), which were fixed to bonded dentinsurfaces. The restored teeth were either light-activated (XL3000 - 3M ESPE) or allowed to selfcuring only. After 24 h, the teeth were both mesiodistally and buccolingually sectioned to obtainbonded beam specimens (0.8 mm2 cross-sectional area). Each specimen was tested in microtensilestrength at a crosshead speed of 0.5 mm/min until failure.Results:
Data (in MPa) were analyzedstatistically by three-way ANOVA and Tukeys post-hoc test (pre-set á = 0.05). No significantdifference was observed between resin cements (p=0.26) and viscosities (p=0.13), however, thecuring mode affected the BS within the viscosities (p=0.01). Statistically significant difference wasobserved for low viscosity Nexus 2 23.8(10.6) (dual-cure) and 16.0(5.1) (self-cure); VariolinkII 28.7(8.7) (dual-cure) and 11.9(3.0) (self-cure).Conclusions:
Light activation yielded higherbond strength for the low-viscosity versions of the resin cements.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Resin Cements
/
Dentin
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2012
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Campinas State University/BR
/
University Nove de Julho/BR
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