Effects of in-office bleaching agents on polished and unpolished nanofilled resin composite

Kayalıdere, Ezgi Erden; Dörter, Can

doi:10.1016/j.adaj.2023.04.005

Cited by 5 publications

(5 citation statements)

References 34 publications

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“…The polishing system OG (1S) had the lowest %R of surface roughness (Table 4), and the average surface roughness was higher than the 0.2 μm threshold for all the resin composites polished using OG (1S) (Figure 1). This finding corroborates the results of other studies 19,24,31 …”

Section: Discussionsupporting

confidence: 94%

“…For all resin composites polymerized directly against this strip, the surface roughness was much lower than 0.2 μm, which corresponds to the threshold of plaque accumulation 7 . This finding corroborates other studies that showed that the smoothest surface of resin composite is obtained when processed against a PS 21,24 . Regarding gloss, all of the resin composites photopolymerized against a PS had higher values than those suggested as being ideal by the American Dental Association (ADA) 12 .…”

Section: Discussionsupporting

confidence: 85%

“…A variety of instruments and different protocols have been used for polishing resin composites, such as multilaminated drills, diamond‐impregnated rotary instruments, rubber or silicone disks and wheels, and carbide‐ and aluminum oxide‐based abrasive disks 15–20 . The application of multistep systems, such as Soflex discs followed by the use of a diamond paste, has been routinely used by practitioners, and the effectiveness of these systems is well established 21–24 . However, the surface morphology of resin composites after finishing and polishing is dependent on multiple extrinsic and intrinsic factors 25 …”

Section: Introductionmentioning

confidence: 99%

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In vitro comparison of one‐step, two‐step, and three‐step polishing systems on the surface roughness and gloss of different resin composites

Lippert,

Bresciani,

Mota

et al. 2023

J Esthet Restor Dent

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ObjectivesThis laboratory study evaluated the effect of three polishing systems on the surface roughness and gloss of resin composites.Materials and MethodsThirty specimens (6 mm Ø × 8 mm) were fabricated from each of three resin composites: Z 350 XT (nanofill), Harmonize (nanohybrid), and Estelite Omega (supranonofill). All specimens were photopolymerized using a multi‐peak LED curing unit (VALO—Standard mode), having a exitance irradiance of approximately 1000 mW/cm2 against a polyester strip (PS). 2 mm was then removed from the irradiated end (finished) using #320 abrasive paper (F). Specimens were then randomly polished (P) using a one‐step (1S) (OneGloss), two‐step (2S) (EVE Diacomp Twist Basic CA), or 3‐step (3S) (Astropol P) system (n = 10). For PS, F, and P groups, surface roughness (Ra) was measured using a surface roughness tester, and surface gloss was measured with a glossmeter. For each specimen, the percent recovery to the PS value (%R) of surface roughness and surface gloss were calculated. Data were analyzed using two–way ANOVA, followed by Tukey's test. Surface roughness and gloss values were submitted to Pearson's correlation test (α = 0.05). All statistical testing was performed using a pre‐set alpha of 0.05.ResultsThe interaction term [resin composite × polishing system] was significant for both surface roughness (p = 0.001) and gloss (p = 0.0001). For all resin composites, the 2S and 3S systems provided a higher %R of surface roughness and gloss compared to those of the 1S system. There was a negative correlation between surface roughness and gloss, but only a few combinations showed strong correlations.ConclusionsThe 2S and 3S polishing systems provided surfaces having greater smoothness and gloss compared to the 1S system. The ability to recover surface roughness and gloss was dependent on type of resin composite filler classification.Clinical SignificanceThe 3S and 2S polishing systems were more effective in achieving PS values than was the 1S system for all tested resin composites. However, individual polishing systems performed differently depending on type of resin composite.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In vitro comparison of one‐step, two‐step, and three‐step polishing systems on the surface roughness and gloss of different resin composites

Lippert,

Bresciani,

Mota

et al. 2023

J Esthet Restor Dent

View full text Add to dashboard Cite

show abstract

“…According to the literature, the surface of the resin with bis-GMA has a more regular surface with lower roughness than the resin without bis-GMA, and the roughness increases with the use of bleaching agents [28] [29]. In the present study, in both composites, the surface of the samples exhibited a greater roughness with 45% CP treatment, coinciding with other published studies [30].…”

Section: Discussionsupporting

confidence: 89%

Effect of Bleaching Agents on Composite Resins With and Without BIS-GMA.

Melo,

Dumitrache,

Ghilotti

et al. 2023

Preprint

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Objective to evaluate the change in color, hardness and roughness produced by carbamide peroxide (CP) at two different concentrations on two resins. Materials and Methods 16% or 45% CP was applied to 66 resin discs with and without Bis-GMA. Color was measured with a spectrophotometer, and ΔEab and ΔE00 calculated. Microhardness tester and SEM were used. Results In both composites, the a* and b* coordinates tended to red and yellow, respectively, and were significant in the Bis-GMA group (p < 0.05). The ΔEab and ΔE00 were higher in the composite with Bis-GMA, regardless of the treatment received (p < 0.05). The microhardness was reduced in both composites regardless of the PC concentration compared to the control (p < 0.05). 45% CP reduced the microhardness in the resin group with Bis-GMA compared to 16% CP (p < 0.001), but was not significant in the resin without Bis-GMA (p = 1). An increase in roughness was directly proportional to the concentration of CP and it was more notable in the composite without Bis-GMA. Conclusions The composite with Bis-GMA showed a greater tendency to darken than the one without Bis-GMA. The surface hardness of the composite was reduced in both composites and was not influenced by CP concentration in the composite without Bis-GMA. Clinical relevance: Bleaching is a common procedure nowadays. It is important to know how how CP affects composites to establish a prognosis of the treatments, both in terms of color change, roughness or hardness.

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“…According to the literature, the surface of the resin with Bis-GMA has a more regular surface with lower roughness than the resin without Bis-GMA, and the roughness increases with the use of bleaching agents [ 28 , 29 ]. In the present study, in both composites, the surface of the samples exhibited a greater roughness with 45% CP treatment, coinciding with other published studies [ 30 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Bleaching Agents on Composite Resins with and without Bis-GMA: An In Vitro Study

Melo,

Dumitrache,

Ghilotti

et al. 2024

JFB

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The objective was to evaluate the change in color, hardness, and roughness produced by carbamide peroxide (CP) at two different concentrations on two resins. The 16% or 45% CP was applied to 66 resin discs with and without Bis-GMA. The color was measured with a spectrophotometer, and ΔEab and ΔE00 were calculated. Microhardness tester and SEM were used. In both composites, the a* and b* coordinates tended to be red and yellow, respectively, and were significant in the Bis-GMA group (p < 0.05). The ΔEab and ΔE00 were higher in the composite with Bis-GMA, regardless of the treatment received (p < 0.05). The microhardness was reduced in both composites regardless of the PC concentration compared to the control (p < 0.05). The 45% CP reduced the microhardness in the resin group with Bis-GMA compared to 16% CP (p < 0.001) but was not significant in the resin without Bis-GMA (p = 1). An increase in roughness was directly proportional to the concentration of CP, and it was more notable in the composite without Bis-GMA. The composite with Bis-GMA showed a greater tendency to darken than the one without Bis-GMA. The surface hardness of the composite was reduced in both composites and was not influenced by CP concentration in the composite without Bis-GMA. Bleaching is a common procedure nowadays. It is important to know how CP affects composites to establish a prognosis of the treatments in terms of color change, roughness, and hardness.

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Effects of in-office bleaching agents on polished and unpolished nanofilled resin composite

Cited by 5 publications

References 34 publications

In vitro comparison of one‐step, two‐step, and three‐step polishing systems on the surface roughness and gloss of different resin composites

In vitro comparison of one‐step, two‐step, and three‐step polishing systems on the surface roughness and gloss of different resin composites

Effect of Bleaching Agents on Composite Resins With and Without BIS-GMA.

Effect of Bleaching Agents on Composite Resins with and without Bis-GMA: An In Vitro Study

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