Effect of finishing and polishing on surface roughness of composite resins after bleaching

Bittencourt, Bruna Fortes; Gomes, Giovana Mongruel; Trentini, Felipe Auer; Azevedo, Mônica Regina de; Gomes, João Carlos; Gómes, Osnara María Mongruel

doi:10.1590/1677-3225v13n2a15

Cited by 4 publications

(3 citation statements)

References 24 publications

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“…For PD group (felt disc + diamond paste), it is noted that this system considerably reduced the surface roughness left by the diamond tip, possibly because it has high hardness micronized abrasive diamond grains, wearing the particles that were exposed irregularly 15 . Just as in the current research, the findings of Martins Alves et al 15 and Bittencourt et al 23 also confirmed the influence of this polishing mechanism on the roughness of compound resins, visualizing a decrease in Ra values when used on rough surfaces. In contrast, Costa et al 2 suggest that the use of diamond paste in composite resins may be of value when used later on for instruments with aluminum oxide in the composition, in the case of this study, present in Sof-Lex and Enhance.…”

Section: Resultand Discussionsupporting

confidence: 88%

Influence of Finishing/Polishing in Surface Roughness of Conventional Nanocomposites and Bulk-Fill

Silva¹,

Souza²,

Mori³

et al. 2021

J. Health Scie.

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The choice of the best finishing/polishing methods for composite resin restorations is critical to the choice of excellence results related to longer clinical longevity. The objective of the study was to evaluate the influence of finishing and polishing systems on the surface roughness of a Nanoparticulate and Bulk-fill resin. For the research, 40 sample disks were prepared for each composite: single-increment (BF) (Bulk Fill 3M), both 2 mm thick and 10 mm in diameter (FZ) (Filtek Z350, 3M). The specimens were randomly divided into 4 groups with 10 samples each, according to the different materials to which they were subjected to the finishing and polishing protocols: control [C]- diamond tip (FG 4137F, FAVA); [EN] polishing discs (Enhance, Dentsply); [SL] Abrasive discs (Sof-Lex Pop-on, 3M) and [PD] felt disc + Polishing paste (Diamond Excel, FGM). A surface roughness (Ra) was verified with a roughness meter in three different data volumes and calculated as arithmetic means. Data were statistically treated by one way ANOVA followed by test t and student t test. Regardless of the data tested, evidence of the systemic controlling against different systems for polishing control with control (p <0.05). PD presented statistically greater roughness to the EN and SL (p <0.001), these in turn obtained similar performance and presented the lowest values of roughness for both composites (p> 0.05). The different finishing / polishing methods influenced the surface roughness of both composites, observing for Sof-lex and Enhance lower Ra values.Keywords: Nanoparticles. Dental Polishing. Composite Resins.ResumoA escolha dos adequados métodos de acabamento/polimento para restaurações de resina composta é fundamental para obtenção de resultados de excelência, relacionados a maior longevidade clínica. O objetivo desse estudo foi avaliar a influência dos sistemas de acabamento e polimento na rugosidade de superfície das resinas nanoparticuladas convencional e bulk-fill. Para a pesquisa foram confeccionados 40 discos de amostra para cada compósito: Convencional [FZ] (Filtek Z350, 3M) e de incremento único [BF] (Filtek Bulk Fill, 3M), ambas com 2 mm de espessura e 10 mm de diâmetro. Foram divididos aleatoriamente em 4 grupos com 10 amostras cada, de acordo com os diferentes protocolos que receberam, sendo: controle (C) ponta diamantada (FG 4137F, FAVA); (EN) discos de silicone (Enhance, Dentsply); (SL) discos abrasivos (Sof-Lex Pop-on, 3M); (PD) Feltro + Pasta diamantada (Diamond Excel, FGM). A rugosidade de superfície (Ra) foi verificada com um rugosímetro em três leituras de diferentes direções e calculadas as médias aritméticas. Os dados foram tratados estatisticamente pelos testes ANOVA 1 fator seguido pelo teste t e t de student (p<0,05). Independente da resina testada, evidenciou-se diminuição da rugosidade pelos diferentes sistemas de polimento frente ao grupo controle (p<0,05). PD apresentou rugosidade estatisticamente maior à EN e SL (p<0,001), estes últimos que por sua vez obtiveram desempenho semelhante e apresentaram os menores valores de rugosidade para ambos os compósitos (p>0,05). Os diferentes métodos de acabamento/polimento influenciaram na rugosidade de superfície dos dois compósitos testados, observando para Sof-lex e Enhance menores valores de Ra. Palavras-chave: Nanopartículas. Polimento Dentário. Resinas Compostas.

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Section: Resultand Discussionsupporting

confidence: 88%

Influence of Finishing/Polishing in Surface Roughness of Conventional Nanocomposites and Bulk-Fill

Silva¹,

Souza²,

Mori³

et al. 2021

J. Health Scie.

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“…In contrast, IP contains nanosized and micrometric filler particles, and deep wear would expose nanosized and micrometric filler particles on the sub‐subsurface. In comparison with the felt discs used, Astropol rubber tips have increased hardness and deeper wear capability (Bittencourt et al, ). Thus, after SP, Astropol could expose nanosized filler particles in FZ and micrometric filler particles in IP, whereas the flexible felt discs did not create wear and exposed only the subsurface layer rich in nanosized filler particles in IP.…”

Section: Discussionmentioning

confidence: 99%

Effect of additional polishing methods on the physical surface properties of different nanocomposites: SEM and AFM study

Costa

Fernandes

Carvalho

et al. 2018

Microscopy Res & Technique

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This evaluated the arrangement of filler particles in depth of nanocomposites, and surface roughness, wettability, microtopography, and micromorphology following additional polishing step. Forty samples of each composite tested [Filtek Z350XT (FZ), IPS Empress Direct (IP)] were fabricated and finished/polished/additionally polished using one of the following methods (n = 10/group): no finishing/polishing (NFP), Sof-Lex Pop-On + no additional polishing (SP), Sof-Lex Pop-On + Astropol rubber polisher (SP+A), and Sof-Lex Pop-On + felt disc with polishing paste (SP+FP). Surface roughness (Ra) and contact angles were measured using a profilometer and goniometer, respectively. Microtopography and micromorphology were evaluated using atomic force microscopy and scanning electron microscopy, respectively. Ra and contact angle data were examined by two-way analysis of variance and Tukey's test (p < .05). Organic matrix, lower and larger filler particles were disposed in depth. Mean Ra values were lowest and contact angles were smallest in the NFP group for both composite resins. SP+A and SP+FP decreased mean Ra in comparison with SP for FZ, whereas only SP+FP decreased mean Ra in comparisonwith SP for IP. Only SP+FP increased contact angles in comparison with SP for FZ, whereas contact angles in the SP+A, SP+FP, and SP groups were similar for FZ. Both composites presented more uniform topography and smother surfaces following SP+A and SP+FP in comparison with SP. Therefore, additional polishing improved surface smoothness and decreased wettability of the composite resins studied. SP+FP produced smoother and less wettable surfaces for FZ and IP.

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“…The bleaching agents can react differently with each phase or their interface. Bleaching treatments of restorative materials may affect surface gloss 5 , microhardness 6,8 , roughness 6,7,[9][10][11][12] , color [13][14][15][16] , and the amount of elutable components 17,18 . Surface polishing after bleaching may not restore the physical properties of the restorative material because subsurface layers up to 2.0 mm can be affected 8 .…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrogen peroxide application on color and surface roughness of two restorative materials

et al. 2017

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Aim: This study investigated the effect of an in-office bleaching technique on lightness, color and surface roughness of two commercially available materials: a resin-modified glass-ionomer cement and a nanohybrid resin composite. Methods: Twelve disk-shaped specimens were prepared with both materials. The samples were bleached with 35% hydrogen peroxide. Bleaching was tested initially onto a smooth surface and later onto a polished one of the same specimens. The effect of the treatments on lightness and color was verified with a spectrophotometer. Surface roughness was measured with a digital surface roughness tester. The data were statistically analyzed by repeated measures ANOVA and post hoc Tukey’s test (alpha = 0.05). Results: Significant variation in lightness and color was observed on the resin-modified glass-ionomer cement after the first bleaching procedure. Roughness increased significantly only after polishing the resin-modified glass-ionomer cement surface. Composite color variation was evident in the last observation period, but roughness and lightness variation due to bleaching and polishing was not significant. Conclusion: The bleaching treatment caused significant color alterations on the materials tested. This study observed that the application of in-office bleaching onto the glass-ionomer cement promoted clinically observable color alteration, and polishing after bleaching is contraindicated for this material.

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Effect of finishing and polishing on surface roughness of composite resins after bleaching

Cited by 4 publications

References 24 publications

Influence of Finishing/Polishing in Surface Roughness of Conventional Nanocomposites and Bulk-Fill

Influence of Finishing/Polishing in Surface Roughness of Conventional Nanocomposites and Bulk-Fill

Effect of additional polishing methods on the physical surface properties of different nanocomposites: SEM and AFM study

Effect of hydrogen peroxide application on color and surface roughness of two restorative materials

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