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Type: Artigo
Title: Effect Of Activation Mode On Flexural Strength And Elasticity Modulus Of Dual Cure Resin Cements
Author: Guimaraes
Isadora R.; Gomez
Fabian Murillo; De Goes
Mario F.
Abstract: This study evaluated the effect of the activa tion mode on flexural strength and elasticity modulus of four dual cure resin-based cements. Methods: Two self-adhesive resin cements (Clearfil SA Cement (CSA) and RelyX U100 (U)) and two conventional resin cements (Clearfil Esthetic Cement (CE) and RelyX ARC (ARC)) were used to produce a total of 45 bar specimens (7x2x2 mm) using three different activation modes (n=15): Direct light-cure (D), Indirect light-cure using a 2mm composite resin barrier (I) and Self-cure (S). Three-point flexural tests were performed after 24 hours water storage at 37 degrees C, using a universal testing machine (Instron) at a cross-speed of 0.5 mm/min until fracture. Flexural strength (MPa) and elasticity modulus values were subjected to ANOVA and Tukey's Test (alpha=0.05). Results: Data revealed that light polymerized groups presented statistically higher flexural strength (CSA/D=113.63 +/- 19.65; CSA/I=80.66 +/- 23.74; U/D=101.33 +/- 9.8; U/I=94.96 +/- 36.9; CE/D=219.08 +/- 39.94; CE/I=226.42 +/- 34.59; ARC/D=150.03 +/- 26.15; ARC/I=111.78 +/- 14.28) and also elasticity modulus values (CSA/D = 2.9 +/- 0.6; CSA/I = 1.5 +/- 0.4; U/D = 2.9 +/- 0.5; U/I = 2.6 +/- 1.4; CE/D = 6.5 +/- 1.3; CE/I = 5.8 +/- 1.0; ARC/D = 4.2 +/- 0.93; ARC/I = 2.5 +/- 0.5) compared to self-cured groups (flexural strength: CSA/S=65.81 +/- 21.84; U/S=53.62 +/- 28.73; CE/S=129.02 +/- 51.67; ARC/S=77.98 +/- 19.61 and elasticity modulus: CSA/S = 1.4 +/- 0.5; U/S = 1.2 +/- 0.7; CE/S = 2.2 +/- 1.5; ARC/S = 1.0 +/- 0.5). The usage of a composite resin barrier only affected the mechanical properties of ARC and CSA. Conventional resin cements presented higher flexural strength values than the self-adhesive cements. CE presented the highest values compared to all other cements. No statistical difference was observed between self-adhesive cements. Conclusion: Light-curing of resin luting cements produced higher flexural strength for all tested materials. Similar mechanical behavior was observed for the tested self-adhesive cements.
Subject: Dual Cure Resin-based Cement
Self-adhesive Cement
Activation Mode
Flexural Strength
Modulus Of Elasticity
Editor: Univ Costa Rica, Fac Odontologia
San Jose
Citation: Odovtos International Journal Of Dental Sciences. Univ Costa Rica, Fac Odontologia, v. 18, p. 61 - 71, 2016.
Rights: aberto
Identifier DOI: 10.15517/ijds.v0i0.23556
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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