The effect of surface sealant application and accelerated aging on posterior restorative surfaces: An SEM and AFM study

Tekçe, Neslihan; Pala, Kanşad; Tuncer, Safa; Demırcı, Mustafa

doi:10.4012/dmj.2016-173

Cited by 21 publications

(20 citation statements)

References 38 publications

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“…We found that rather than decreasing surface roughness values with the application of a glaze material, these values actually increased with an additional slight increase following thermocycling (10,000 thermocycles). 19 Flury et al 27 examined the effect of water storage on the surface roughness of CAD/CAM restoratives. They found that surface roughness and micromechanical properties were significantly influenced by CAD/CAM material, polishing system, and water storage.…”

Section: Discussionmentioning

confidence: 99%

The effect of glazing and aging on the surface properties of CAD/CAM resin blocks

et al. 2018

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PURPOSETo investigate the effect of accelerated aging on surface properties of glazed CAD/CAM resin blocks using a 2D surface profilometer and a 3D non-contact optical profilometer.MATERIALS AND METHODSThree types of CAD/CAM resin restorative materials, LAVA Ultimate (3M ESPE, St Paul, MN, USA), VITA Enamic (Vita Zahnfabrik H. Rauter, Bad Säckingen, Germany), and Cerasmart (GC Corparation, Tokyo, Japan) were used for this study. CAD/CAM blocks were cut in 3-mm thickness slabs and divided into three groups; Group 1: control group (specimens polished with 600 grit SCI paper); Group 2: specimens sandblasted, silanized, and glazed with Optiglaze Color (GC); Group 3: glazed specimens subjected to 5000 thermocycles (n=15). The surface roughness (Ra and Rz) was evaluated using a profilometer and a 3D scanning instrument. Data were analyzed using two-way ANOVA and Tukey's post-hoc test (P<.05).RESULTSLAVA, VITA, and Cerasmart exhibited statistically similar Ra and Rz values for each group (P>.05). For VITA and Cerasmart, the specimens in Group 1 exhibited significantly higher Ra values than Group 2 (P<.05). Group 1 (0.502 Ra), Group 2 (0.384 Ra), and Group 3 (0.431 Ra) exhibited statistically similar Ra values for LAVA (P=.062). After 5000 thermocycles, surface roughness values did not change significantly for glazed LAVA, VITA, and Cerasmart (P>.05).CONCLUSIONGlaze material Optiglaze Color makes CAD/CAM resin surfaces smooth and glazed CAD/CAM surfaces seem resistant to deterioration under 5000 thermocycles.

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Section: Discussionmentioning

confidence: 99%

The effect of glazing and aging on the surface properties of CAD/CAM resin blocks

et al. 2018

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“…Starting from the midpoint of each specimen, 5 measurements were taken in different directions, with a cut-off length of 0.25 mm, and the average roughness values were then calculated and recorded (Ra, in µm). 17 …”

Section: Methodsmentioning

confidence: 99%

“…The CAD/CAM specimens were examined under a scanning electron microscope (SEM) (LEO 440, LEO Electron Microscopy, Oxford, England) at an acceleration voltage of 20 kV and ×2000 magnification. 17 Two different SEM images were obtained from each specimen after sandblasting. One was obtained from upper surface of CAD/CAM block and the other was taken from the cross-section for each material.…”

Section: Methodsmentioning

confidence: 99%

The effect of sandblasting duration on the bond durability of dual-cure adhesive cement to CAD/CAM resin restoratives

2018

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PURPOSETo evaluate the effect of prolonged sandblasting on the bond durability of dual-cure adhesive resin cement to computer-aided design and computer-aided manufacturing (CAD/CAM) restoratives.MATERIALS AND METHODSNano-ceramic LAVA Ultimate and hybrid-ceramic VITA Enamic CAD/CAM blocks were used for this study. Each CAD/CAM block was sectioned into slabs of 4-mm thickness for the microtensile test (µTBS) test and 2-mm thickness for the surface roughness test. Three groups were created according to the sandblasting protocols; group 1: specimens were sandblasted for 15 seconds, group 2: specimens were sandblasted for 30 seconds, and group 3: specimens were sandblasted for 60 seconds. After sandblasting, all specimens were luted using RelyX Ultimate Clicker. Half the specimens were subjected to µTBS tests at 24 hours, and the other half were subjected to tests after 5000 thermocycles. Additionally, a total of 96 CAD/CAM block sections were prepared for surface roughness tests and scanning electron microscopy (SEM) evaluations. The Mann-Whitney U test, Kruskal-Wallis one-way analysis of variance, and Dunn's post hoc test were used to compare continuous variables among the groups.RESULTSAt baseline, group 1, group 2, and group 3 exhibited statistically similar µTBS results for LAVA. However, group 3 had significantly lower µTBS values than groups 1 and 2 for VITA. After 5000 thermocycles, µTBS values significantly decreased for each block (P<.05).CONCLUSIONIt is important to perform controlled sandblasting because it may affect bond strength results. Sixty seconds of sandblasting disturbs the initial µTBS values and the stability of adhesion of CAD/CAM restoratives to dual-cure adhesive resin cement for VITA Enamic.

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“…Previous studies regarding the effectiveness of surface sealants have been controversial. Some researchers suggested the application, whereas some reported no meaning in application (6)(7)(8). There are a few surface sealants of different brands available in the market currently and each have individual application protocols.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Assessment of Surface Sealants for Discoloration of a Nanofilled Resin Composite

KORKUT

2020

Clinical and Experimental Health Sciences

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Objective: This in vitro study was aimed to assess the effect of different surface sealants on discoloration of a nonofilled resin-based composite quantitatively, using a colorimeter. Methods: 40 specimens were prepared using nanofilled resin composite, Filtek Universal Restorative (A2 shade, 3M, USA). Sprecimens were polymerized from both sides, polished using polishing discs (SofLex, 3M, USA) and divided by test groups (n = 10 for each), regarding the sealant used; Permaseal (Ultradent Products, USA), Biscover LV (Bisco, USA), Optiglaze Clear (GC Corp., Japan) and control group. Samples were discolored for 144 hours in coffee solution, and color measurements were performed using colorimeter (ShadeStar, Dentsply Sirona, USA). Nominal color codes of specimens regarding Vita Classical Shade Guide, were converted to corresponding numerical values. Level of color change after sealant application (∆Vita1) and after discoloration (∆Vita2) were calculated. Shapiro Wilk and Kruskal Wallis tests were used for statistical analyses. Results: Color changes in Permaseal, Optiglaze and control groups were significant (p < 0.001) compared to Biscover, for ∆Vita1 scores. Remarkable level of darkening was observed for all groups, for ∆Vita2 scores. Permaseal revealed significantly the highest level of darkening, among all (p < 0.001), but no difference with control group. Optiglaze showed significantly lower level of darkening compared to the control group (p < 0.001), whereas no difference with Biscover (p ≥ 0.05). Biscover group showed similar level of darkening with Optiglaze and control groups (p ≥ 0.05). Conclusion: Permaseal sealant presented significantly the highest discoloration, whereas Biscover and Optiglaze sealants presented similar and lower. Colorimeter might be determined as repeatable method for measuring discoloration in vitro.

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The effect of surface sealant application and accelerated aging on posterior restorative surfaces: An SEM and AFM study

Cited by 21 publications

References 38 publications

The effect of glazing and aging on the surface properties of CAD/CAM resin blocks

The effect of glazing and aging on the surface properties of CAD/CAM resin blocks

The effect of sandblasting duration on the bond durability of dual-cure adhesive cement to CAD/CAM resin restoratives

Colorimetric Assessment of Surface Sealants for Discoloration of a Nanofilled Resin Composite

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