In Vitro Evaluation of Surface Roughness and Microhardness of Restorative Materials Submitted to Erosive Challenges

Briso, André Luiz Fraga; Caruzo, L. P.; Guedes, Ana Paula Albuquerque; Catelan, Anderson; Santos, Paulo Henrique dos

doi:10.2341/10-356-l

Cited by 65 publications

(65 citation statements)

References 21 publications

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“…1 This study employed chemical challenges with acidic solutions, such as hydrochloric acid to simulate the gastric reflux, which may be present in the oral fluids. 11 CocaCola, which presents phosphoric acid and other pigments and substances in its composition; and red wine, due to the low pH and to promote high color change in the restorative materials. 12 The mechanical challenge was performed by toothbrushing, which could influence the surface degradation of restorative materials.…”

Section: Discussionmentioning

confidence: 99%

Influence of Mechanical and Chemical Degradation in the Surface Roughness, Gloss, and Color of Microhybrid Composites

Lemos¹,

Mauro²,

Santos³

et al. 2017

The Journal of Contemporary Dental Practice

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Aim:The aim of this study was to investigate the association of different degradations on the roughness, gloss, and color changes of microhybrid composites. Materials and methods:Ten specimens were prepared for Charisma, Amelogen Plus, Point 4, and Opallis resins. Surfaces were polished and baseline measurements of roughness, gloss, and color were recorded. Specimens were then submitted to chemical and mechanical challenges, and the specimens were reevaluated. Roughness and gloss were analyzed by KruskalWallis and Dunn's test (p < 0.05). Color change (ΔE) was analyzed by one-way analysis of variance and Tukey's tests (p < 0.05). The initial and final data were compared using the Wilcoxon test (p < 0.05). Spearman test checked the correlation between the roughness and gloss (p < 0.05). Results:Regarding surface roughness and gloss, there was no difference between composites before challenges. However, all composites showed a significant increase of roughness after challenges, with highest values for Charisma. The gloss was influenced by challenges, evidencing the best gloss for Point 4. Charisma showed the highest value of color change. There was no correlation between surface roughness and gloss for the initial analysis, and after the challenges. Conclusion:Composites were influenced by association of challenges, and Charisma showed the highest changes for roughness, gloss, and color. gloss, and color change. The dentist should be aware of the performance of different brands, to choose the correct required composite resin for each type of patient or region to be restored.

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Section: Discussionmentioning

confidence: 99%

Influence of Mechanical and Chemical Degradation in the Surface Roughness, Gloss, and Color of Microhybrid Composites

Lemos¹,

Mauro²,

Santos³

et al. 2017

The Journal of Contemporary Dental Practice

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show abstract

“…Also factors like the cross-link nature of the resin matrix, and the solvent sorption uptake have a direct effect on composite resins degradation [20]. Previous studies showed that the increase of composite resins roughness in acidic solutions is probably due to their soften surface that leaches the resin components and displaces the filler particles [21][22][23].…”

Section: Discutionsmentioning

confidence: 99%

The effect of erosion and abrasion on surface properties of composite resin

Stoleriu

Andrian

Pancu

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

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View the article online for updates and enhancements. Related contentComputer Simulation of Stress-Strain State of Pipeline Section Affected by Abrasion Due to Mechanical Impurities P V Burkov, R G Afanas'ev and S P Burkova -Fatigue variation of surface properties of silumin subjected to electron-beam treatment S V Konovalov, K V Aksenova, V E Gromov et al. Abstract. The aim of the study was to evaluate the surface roughness of two commercial composite resins submitted to erosive attack, to abrasive wear and to association of erosive and abrasive challenge. Standardized samples of G-aenial anterior (GC Company) and Essentia (GC Company) composite resins were randomly split in 6 groups. In group 1 the samples were maintained in artificial saliva until the evaluation of surface roughness. In group 2 the samples were submitted only to erosive attack, in group 3 only to abrasive challenge and in groups 4 ,5, and 6 the erosive attack was followed by abrasive challenge immediately (group 4), 30 minutes after the erosive attack (group 5) and one hour after the erosive attack (group 6). The specimens were evaluated using surface roughness measuring tester SJ-210 (Mitutoyo Corporation, Japan) and the mean surface roughness values (Ra, µm) of each specimen were registered. A significantly increase of both composite resins surface roughness was recorded after erosive attack and abrasive challenge. Toothbrushing 60 minutes after acidic contact determined no significant differences in surface roughness of composite resins.

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“…For continuous cola immersion, each specimen was immersed in 10 mL of cola drink (Coca Cola ® , SP, Brazil -pH 2.3) at room temperature in individual containers for 5 weeks [10]. Samples of control 2 group were immersed in 10 mL of artificial saliva for 5 weeks.…”

Section: Erosive Challenge and Continuous Cola Immersionmentioning

confidence: 99%

“…Many studies have been conducted to evaluate the surface properties of restorative materials after erosive challenge [8][9][10], but little information is available in literature about the surface properties of composites for bonding orthodontic brackets to enamel after erosion [6].…”

Section: Introductionmentioning

confidence: 99%

In vitro Effect of Erosive Challenge on Surface Microhardness of Orthodontic Composites

Vieira¹,

Firmino²,

Medeiros³

et al. 2016

Pesqui. bras. odontopediatria clín. integr.

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Objective: To evaluate in vitro the effect of erosive challenge and continuous immersion in cola drink on surface microhardness of orthodontic composites. Material and Methods: Forty samples of three composites (Transbond XT, Quick Cure and Ortho Cem) were prepared (4 x 2 mm) and distributed into 4 groups (n=10): erosive challenge, artificial saliva immersion (control 1), continuous cola immersion and artificial saliva immersion (control 2). Erosive challenge was performed 4 times per day (5 min) in cola drink for 2 h in artificial saliva for 7 days. Samples of continuous cola immersion group were soaked in cola drink for 5 weeks and the beverage was renewed every two days. Control samples were immersed in artificial saliva for 7 days (control 1) and 5 weeks (control 2). Vickers microhardness (VHN) measurements were performed before and after erosive challenge and continuous immersion. Data were evaluated by paired Student's T-test, ANOVA one-way and Tukey tests (α = 0.05). Results: After 7 days of erosive challenge, there was no statistical difference between VHN values before and after erosive challenge and artificial saliva immersion. However, after 5 weeks of cola drink and artificial saliva immersion, significant reduction in VHN values was observed for all composites when compared to baseline values, and specimens immersed in cola drink showed lower VHN compared to those immersed in saliva, regardless of composite composition. Conclusion: After 7 days of erosive challenge, there was no alteration in superficial VHN of orthodontic composites. However, after 5 weeks of immersion in cola drink, significant reduction of VHN values was observed for all composites.

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In Vitro Evaluation of Surface Roughness and Microhardness of Restorative Materials Submitted to Erosive Challenges

Cited by 65 publications

References 21 publications

Influence of Mechanical and Chemical Degradation in the Surface Roughness, Gloss, and Color of Microhybrid Composites

Influence of Mechanical and Chemical Degradation in the Surface Roughness, Gloss, and Color of Microhybrid Composites

The effect of erosion and abrasion on surface properties of composite resin

In vitro Effect of Erosive Challenge on Surface Microhardness of Orthodontic Composites

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