Modulated Photoactivation Methods: Influence On Contraction Stress, Degree Of Conversion And Push-out Bond Strength Of Composite Restoratives.

dc.creatorCunha, Leonardo Goncalves
dc.creatorAlonso, Roberta Caroline Bruschi
dc.creatorPfeifer, Carmem Silvia Costa
dc.creatorCorrer-Sobrinho, Lourenço
dc.creatorFerracane, Jack Liborio
dc.creatorSinhoreti, Mário Alexandre Coelho
dc.date2007-Apr
dc.date2015-11-27T13:10:24Z
dc.date2015-11-27T13:10:24Z
dc.date.accessioned2018-03-29T01:05:21Z
dc.date.available2018-03-29T01:05:21Z
dc.identifierJournal Of Dentistry. v. 35, n. 4, p. 318-24, 2007-Apr.
dc.identifier0300-5712
dc.identifier10.1016/j.jdent.2006.10.003
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/17113700
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/197426
dc.identifier17113700
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1297659
dc.descriptionVerify the influence of curing methods on contraction stress, stress rate, and degree of conversion (DC) of a restorative composite and on bond strength of composite restoratives. For the stress test, composite (0.84 mm thick) was applied between two 5-mm diameter glass rods, mounted in a servohydraulic machine. Stress rate was taken by the value of stress/time at each second. DC was measured by micro-FTIR. Bond strength testing was performed using a push-out test. The C-factor in all tests was 3.0. Four curing methods were tested: continuous light (CL), soft-start (SS), and two pulse delay methods using different initial irradiances--150 mW/cm(2) (PD150) and 80 mW/cm(2) (PD80). Results were analyzed by ANOVA and Tukey's test (alpha=0.05). Stress values ranged from 7.9 MPa (PD80) to 10.3 MPa (CL). No statistical difference was verified among CL, SS, and PD150. PD80 presented statistically lower stress values compared to CL and SS. CL presented the highest maximum stress rate, followed by SS, PD150 and PD80. Mean DC values ranged from 54.2% (PD150) to 55.9% (PD80), with no difference observed among the methods. For the bond strength test, values ranged from 26.4 MPa (CL) to 35.5 MPa (PD150). PD150 and PD80 were both statistically superior to SS and CL. SS presented statistically higher bond strength compared to CL. Modulated curing methods were shown to be effective in reducing contraction stress rate and improving the strength of the bonded interface, and without compromising the DC of the restorative composite.
dc.description35
dc.description318-24
dc.languageeng
dc.relationJournal Of Dentistry
dc.relationJ Dent
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectAnimals
dc.subjectCattle
dc.subjectComposite Resins
dc.subjectDental Bonding
dc.subjectDental Equipment
dc.subjectDental Marginal Adaptation
dc.subjectDental Restoration, Permanent
dc.subjectHardness
dc.subjectLight
dc.subjectMaterials Testing
dc.subjectPhase Transition
dc.subjectSpectroscopy, Fourier Transform Infrared
dc.subjectStress, Mechanical
dc.titleModulated Photoactivation Methods: Influence On Contraction Stress, Degree Of Conversion And Push-out Bond Strength Of Composite Restoratives.
dc.typeArtículos de revistas


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