Effect of remaining dentin thickness and the use of conditioner on micro-tensile bond strength of a glass-ionomer adhesive

2001 ◽  
Vol 17 (5) ◽  
pp. 445-455 ◽  
Author(s):  
Satoshi Inoue ◽  
Bart Van Meerbeek ◽  
Yasuhiko Abe ◽  
Yasuhiro Yoshida ◽  
Paul Lambrechts ◽  
...  
Keyword(s):  
Bond Strength ◽  
Tensile Bond Strength ◽  
Glass Ionomer ◽  
Dentin Thickness

scholarly journals Addition of Chlorhexidine Gluconate to a Glass Ionomer Cement: A Study on Mechanical, Physical and Antibacterial Properties

2014 ◽  
Vol 25 (1) ◽  
pp. 33-37 ◽  
Author(s):  
Luana Mafra Marti ◽  
Margareth da Mata ◽  
Beatriz Ferraz-Santos ◽  
Elcilaine Rizzato Azevedo ◽  
Elisa Maria Aparecida Giro ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Bond Strength ◽  
Setting Time ◽  
Glass Ionomer Cement ◽  
Surface Hardness ◽  
Tensile Bond Strength ◽  
Glass Ionomer ◽  
Diffusion Test ◽  
Agar Diffusion Test ◽  
Ionomer Cement

The objective of this work was to determine the effect of different concentrations of chlorhexidine digluconate (CHX) on setting time, surface hardness, maximum tensile bond strength and antibacterial activity of a glass ionomer cement (GIC). The material used as control was Ketac Molar Easymix GIC. CHX was incorporated into the GIC during its manipulation at concentrations of 0.5, 1.0 and 2.0%. Antimicrobial activity against S. mutans and L. acidophilus was evaluated by means of agar diffusion test. Tensile bond strength data were analyzed statistically using Analysis of variance and Tukey's test. Setting time, Vickers hardness and agar diffusion test were analyzed using Kruskal-Wallis and Mann-Whitney tests at a significance level of 5%. It was observed that adding CHX at concentrations of 1% and 2% increased significantly the setting time of the material (p=0.012 and p=0.003, respectively). There was no significant difference between control and 0.5% CHX groups regarding the setting time. Addition of 2% CHX decreased significantly the surface hardness in relation to the control group (p=0.009), followed by the 1% CHX group (p=0.009). The tensile bond strength of the material also decreased significantly after adding CHX at a concentration of 2% (p=0.001). Addition of CHX promoted formation of an inhibition halo in both bacterial strains for all concentrations. The results showed that the best option for clinical use of GIC with CHX is at 0.5% concentration, since antibacterial activity increased and the physical-mechanical properties remained unchanged.

scholarly journals Effect of Enamel Etching on Tensile Bond Strength of Brackets Bonded In Vivo with a Resin-reinforced Glass Ionomer Cement

2007 ◽  
Vol 77 (1) ◽  
pp. 113-116 ◽  
Author(s):  
Gabriella Rosenbach ◽  
Julio Pedrae Cal-Neto ◽  
Silvio Rosan Oliveira ◽  
Orlando Chevitarese ◽  
Marco Antonio Almeida
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Tensile Bond Strength ◽  
Glass Ionomer ◽  
Significant Difference ◽  
Group 2 ◽  
Ionomer Cement ◽  
Group 1

Abstract Objective: To evaluate the influence of enamel etching on tensile bond strength of orthodontic brackets bonded with resin-reinforced glass ionomer cement. Materials and Methods: The sample group consisted of 15 patients who had indications for extraction of four premolars for orthodontic reasons, equally divided into two different groups according to bracket and enamel preparation. Brackets were bonded in vivo, by the same operator, using a split mouth random technique: Group 1 (control), phosphoric acid + Fuji Ortho LC; Group 2, Fuji Ortho LC without acid conditioning. The teeth were extracted after 4 weeks using elevators. An Instron Universal Testing Machine was used to apply a tensile force directly to the enamel-bracket interface at a speed of 0.5 mm/min. The groups were compared using a Mann-Whitney U-test and Weibull analysis. Results: Mean results and standard deviations (in MPa) for the groups were: Group 1, 6.26 (3.21), Group 2, 6.52 (2.73). No significant difference was observed in the bond strengths of the two groups evaluated (P = .599). Conclusions: Fuji Ortho LC showed adequate shear bond strength and may be suitable for clinical use.

scholarly journals Tensile bond strength of glass fiber posts luted with different cements

2007 ◽  
Vol 21 (2) ◽  
pp. 159-164 ◽  
Author(s):  
Gerson Bonfante ◽  
Osvaldo Bazzan Kaizer ◽  
Luiz Fernando Pegoraro ◽  
Accácio Lins do Valle
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Resin Cement ◽  
Tensile Bond Strength ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Fiber Posts ◽  
Glass Fiber Posts ◽  
Group 2 ◽  
Group 1

Proper selection of the luting agent is fundamental to avoid failure due to lack of retention in post-retained crowns. The objective of this study was to investigate the tensile bond strength and failure mode of glass fiber posts luted with different cements. Glass fiber posts were luted in 40 mandibular premolars, divided into 4 groups (n = 10): Group 1 - resin-modified glass ionomer RelyX Luting; Group 2 - resin-modified glass ionomer Fuji Plus; Group 3 - resin cement RelyX ARC; Group 4 - resin cement Enforce. Specimens were assessed by tensile strength testing and light microscopy analysis for observation of failure mode. The tensile bond strength values of each group were compared by ANOVA and Tukey test. The significance level was set at 5%. The failure modes were described as percentages. The following tensile strength values were obtained: Group 1 - 247.6 N; Group 2 - 256.7 N; Group 3 - 502.1 N; Group 4 - 477.3 N. There was no statistically significant difference between Groups 1 and 2 or between Groups 3 and 4, yet the resin cements presented significantly higher tensile bond strength values than those presented by the glass ionomer cements. Group 1 displayed 70% of cohesive failures, whereas Groups 2, 3 and 4 exhibited 70% to 80% of adhesive failures at the dentin-cement interface. We concluded that resin cements and glass ionomer cements are able to provide clinically sufficient retention of glass fiber posts, and that glass ionomer cements may be especially indicated when the application of adhesive techniques is difficult.

Sign in / Sign up

Export Citation Format

Share Document