Effects of layering technique on the shade of resin overlays and the microhardness of dual cure resin cement

Chang, Hoon-Sang; Hong, Sung-Ok

doi:10.1590/1807-3107bor-2014.vol28.0016

Cited by 4 publications

(4 citation statements)

References 18 publications

(27 reference statements)

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“…Therefore, the application of several layers of material is a common clinical step during the sculpting process of composite restorations. 3,4 One of the main drawbacks of sculpting composite restorations is that some materials are sticky, reducing the ease of handling and insertion of the material into the tooth cavity. Some materials readily adhere to the composite instruments; thus, limiting reestablishment of the shape and anatomical contour of the tooth.…”

Section: Introductionmentioning

confidence: 99%

Effects of modeling liquid/resin and polishing on the color change of resin composite

et al. 2016

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Modeling liquids/resins have been used to build up resin composite (RC) restorations, although there is a lack of information regarding their effects on the color stability of the latter. Therefore, the purpose of the present study was to evaluate the effects of the presence of modeling liquid between layers of RC and the finishing/polishing state of the material on color change in specimens exposed to red wine staining over time. Specimens were prepared by placing four increments (±0.5 mm thick) of RC (Filtek™ Z350 XT, 3M ESPE) into molds; half of which were prepared by applying modeling liquid (Scotchbond™ Multi-Purpose™ Adhesive, SBMP, 3M ESPE) between the layers of RC, whereas the other half were prepared without SBMP (control). Light-activation was performed after application of the final RC layer using a light-emitting diode (Radii, SDI) curing unit with an irradiance of 900 mW/cm 2 for 20 s. Each group was divided according to the surface finishing protocol (n = 7): nothing (non-polished) or polishing with Sof-Lex™/diamond paste (polished). Initial colors of the specimens were evaluated with a digital spectrophotometer and the CIEL * a * b * color system. The specimens were stored in wine (37°C) for 12 months, and the color measurements were reassessed after 4, 6, and 12 months of storage. Scanning electron microscopy (SEM) analysis was performed at the end. Data were analyzed using ANOVA and Tukey's test (α = 5%). The presence of SBMP resulted in lower overall color change of the RC as compared with the control. The non-polished specimens exhibited a significantly higher color change than the polished specimens. SEM images corroborated the previous findings. In summary, the use of modeling liquid between layers of RC shows potential for application to reduce or delay the staining process of RC over time. Moreover, polishing is essential to provide increased color stability of the RC restoration.

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Section: Introductionmentioning

confidence: 99%

Effects of modeling liquid/resin and polishing on the color change of resin composite

et al. 2016

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“…First, the composite resins display clinically acceptable polymerization depths of up to 2mm in thickness (2). Second, in order to achieve perfect and esthetic results, a combination of composites in different color tones should be used (3). However, in view of the fact that composites comprise viscous monomers and the material adheres to the dental instruments, the placement and shaping of the restorative material during the layering procedure might be challenging (4).…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Wetting Resin on the Color Stability and Microhardness of Esthetic Composites

Cangül

Erpaçal

Adıgüzel

et al. 2020

Odovtos - Int J Dent Sc

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Objective: The aim of this study was to evaluate and compare the effects of the superficial application of two different modeling resins on the surface microhardness and discoloration of composite resins. Material and Methods: The present study used two different composites and modeling resins. The composites were placed in plastic molds. Subsequently, the modeling resins were applied on the surface of the two composite groups. The microhardness and color pertaining to all the groups were evaluated. The current study used the One-Way ANOVA and Kruskal Wallis tests, in order to perform the statistical evaluation (p<0.05). Results: The present study compared the microhardness pertaining to the groups and the highest microhardness values were observed in the Estelite Asteria group (none), whereas the lowest values were observed in the GC Essentia group (Ultradent). Moreover, the current study evaluated the color stability and the greatest discoloration was observed in the control group of the GC Essentia group, whereas the least discoloration was observed in the Estelite Asteria group that included the samples prepared using Ultradent Wetting Resin. Conclusions: The results of the present study demonstrated that the use of modeling resins, which facilitate the placement of composite resins, reduced the microhardness and discoloration of composite resins. The aforementioned effect can be attributed to the variations in the structure of the filling. However, further studies are warranted to support and verify the results of the current study.

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“…In the repair of amalgam restorations with composite resins, the surface of the amalgam must be roughened and a bonding agent must be used between the materials (13)(14)(15). In our study, the bonding strength at the amalgam-composite interface was evaluated in the restoration of amalgam exposed to different surface treatments with composite resins.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of shear bond strength of amalgam restorations repaired with composite resin by different surface treatments

et al. 2019

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Aim: Repairing amalgam restorations with composite resins is a clinical practice with many advantages. An effective adhesion is achieved between amalgam and composite by applied different surface treatment on amalgam surface. In this study, the effect of adhesive systems applied on amalgam surface on composite-amalgam connection was investigated. Methodology: Standard cavities were opened in 70 acrylic molds that had completed their polymerization and amalgams were placed in these cavities. Seven groups were randomly assigned to different surface treatments on amalgam. In group 1 only roughening with diamond bur , in group 2 acid etch, in group 3 acid application after roughening with diamond bur, in group 4 roughening with diamond bur and silane, in group 5 acid etch and silane, in group 6 roughening with diamond bur and Alloy Primer and finally 7. acid etch and Alloy Primer was applied in the samples. After the application of clearfil universal bond to all groups, composite resins were placed and polymerized. Shear bond strengths were tested with a Universal testing machine. Obtained data were evaluated by one way ANOVA and Tukey B tests. Results: In the statistical evaluation of the groups, the highest shear bond strength between amalgam-composite was seen in the 3rd group where both roughening with diamond bur and acid were applied together, and the lowest shear bond strength was seen in the first group with only roughening with diamond bur. The differences between the groups were statistically significant (p <0.05). Conclusion: The roughening of the amalgam surface affects the shear bond strength between amalgam and composite resin. These results obtained in vitro conditions should be supported with clinical studies. How to cite this article: Cangül S, Adıgüzel Ö, Erpaçal B, Ünal M, Acartürk M, Satıcı Ö. Evaluation of shear bond strength of amalgam restorations repaired with composite resin by different surface treatments. Int Dent Res 2019;9(3):105-10. Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

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Effects of layering technique on the shade of resin overlays and the microhardness of dual cure resin cement

Cited by 4 publications

References 18 publications

Effects of modeling liquid/resin and polishing on the color change of resin composite

Effects of modeling liquid/resin and polishing on the color change of resin composite

Effect of Surface Wetting Resin on the Color Stability and Microhardness of Esthetic Composites

Evaluation of shear bond strength of amalgam restorations repaired with composite resin by different surface treatments

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