scholarly journals Surface Roughness of Bulk Fill Composite after Simulated Toothbrushing with Different Dentifrices

2020 ◽  
Vol 8 (D) ◽  
pp. 166-172
Author(s):  
Ahmed Mohamed Elmarakby ◽  
Mahmoud Darwish ◽  
Yasser R. Souror ◽  
Ahmed Waly
Keyword(s):  
Surface Roughness ◽  
Chemical Composition ◽  
Analysis Of Variance ◽  
Composite Resin ◽  
In Vitro Study ◽  
Resin Composites ◽  
Composite Surface ◽  
Significance Level ◽  
Composite Resin Restorations

AIM: The aim of the current in vitro study was to evaluate the changes in surface roughness of bulk fill composites after simulated toothbrushing with different dentifrices. MATERIALS AND METHODS: Three types of bulk fill resin composites were used in this study; 27 specimens of each composite resin were randomly divided into three main groups (n = 9). Each main group was further subdivided into three subgroups (n = 3). Each group was subjected to simulated toothbrushing with three different dentifrices. One-way analysis of variance was used to evaluate the effect of brushing using dentifrices on the surface roughness of each type of composite resin, followed by Tukey’s test at a significance level of p ≤ 0.5%. RESULTS: Results revealed that different effects on composite surface roughness were detected after simulating toothbrushing with different dentifrices. Lacalut toothpaste abrades more with Filtek Bulk Fill, Tetric N-Ceram then Bulk Fill SDR. Crest 3D toothpaste abrades more with Tetric N-Ceram, Bulk Fill SDR then Filtek Bulk Fill. BlanX toothpaste abrades more with Tetric N-Ceram, Bulk Fill SDR then Filtek Bulk Fill. CONCLUSION: Chemical composition of both resin composites and dentifrices plays an important role in influencing the degree of surface roughness of bulk fill composite resin restorations.

scholarly journals Press-On Force Effect on the Efficiency of Composite Restorations Final Polishing—Preliminary In Vitro Study

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 705
Author(s):  
Anna Lehmann ◽  
Kacper Nijakowski ◽  
Natalia Potempa ◽  
Paweł Sieradzki ◽  
Mateusz Król ◽  
...  
Keyword(s):  
Surface Roughness ◽  
In Vitro Study ◽  
Composite Resins ◽  
Major Influence ◽  
Composite Surface ◽  
Significance Level ◽  
Subsequent Step ◽  
Optical Profilometer ◽  
Applied Forces

The surface texture of dental restorations has a major influence on plaque accumulation and aesthetical appearance. The study aimed to evaluate the surface roughness of composite resins depending on the varying polishing sequences and applied forces. A total of 60 samples from two composite resins (Boston and Charisma) were polymerized using a lamp with 1200 mW/cm2 intensity and covering celluloid strip. The polishing sequence consisted of 12.6 mm OptiDisc (Kerr) – with increased disc per each subsequent step. Half of the samples were polished at 1N force, with the other half at 2N. The surface roughness examination was performed using a WYKO NT930 (Veeco) optical profilometer. The selected roughness parameters were compared by ANOVA with the significance level α = 0.05. The more complex polishing sequence affected on the composite smoothness. Higher roughness was identified in Charisma samples as compared to Boston. The specimens polished with 2N force contained a slightly rougher surface than those polished with 1N. However, these differences were not statistically significant. Despite the satisfactory visual effect obtained by polishing the composite samples, the profilometric examination revealed the roughness. Finishing is crucial for providing a smooth composite surface, allowing it to function properly in the oral environment.

scholarly journals The effect of one-step and multi-step polishing systems on the surface roughness and microhardness of novel resin composites

2012 ◽  
Vol 06 (02) ◽  
pp. 198-205 ◽  
Author(s):  
Ugur Erdemir ◽  
Hande Sar Sancakli ◽  
Esra Yildiz
Keyword(s):  
Surface Roughness ◽  
Resin Composite ◽  
In Vitro Study ◽  
Resin Composites ◽  
Significance Level ◽  
Significant Difference ◽  
One Step ◽  
Wet Ground ◽  
Post Hoc

ABSTRACTObjectives: The objective of this in vitro study was to evaluate the surface roughness and microhardness of three novel resin composites containing nanoparticles after polishing with one-step and conventional multi-step polishing systems.Methods: A total of 126 specimens (10 X 2 mm) were prepared in a metal mold using three nanocomposites (Filtek Supreme XT, Ceram-X, and Grandio), 21 specimens of each resin composite for both tests (n=63 for each test). Following light curing, seven specimens from each group received no polishing treatment and served as controls for both tests. The specimens were randomly polished using PoGo and Sof-Lex systems for 30 seconds after being wet-ground with 1200-grit silicon carbide paper. The mean surface roughness of each polished specimen was determined with a profilometer. The microhardness was determined using a Vickers hardness measuring instrument with a 200-g load and 15 seconds dwell time. The data were analyzed using the Kruskal-Wallis test and the post hoc Dunn's multiple comparison tests at a significance level of .05.Results: Among all materials, the smoothest surfaces were obtained under a matrix strip (control) (P<.05). There were no statistically significant differences among polishing systems in the resin composites for surface roughness (P>.05). The lowest hardness values for the three resin composites were obtained with a matrix strip, and there was a statistically significant difference compared with other polishing systems (P<.05) whereas no statistically significant differences were observed between the polishing systems (P<.05).Conclusion: The current one-step polishing system appears to be as effective as multi-step systems and may be preferable for polishing resin composite restorations. (Eur J Dent 2012;6:198-205)

Microleakage in class V composite resin restorations treated with CO 2 laser: an in-vitro study

2000 ◽  
Author(s):  
Andrea Naddeo Lopes da Cruz ◽  
Narciso Garone Netto ◽  
Adriana Fruges Pagliari ◽  
Juliana Matson ◽  
Ricardo S. Navarro ◽  
...  
Keyword(s):  
Composite Resin ◽  
In Vitro Study ◽  
Vitro Study ◽  
Class V ◽  
Composite Resin Restorations ◽  
Resin Restorations

Effect of bleaching on microleakage of class V composite resin restorations – in vitro study

2019 ◽  
pp. 89-94
Author(s):  
Tânia Pereira ◽  
A. Azevedo ◽  
M. Vasconcelos ◽  
Pedro Mesquita ◽  
Maria T. Carvalho ◽  
...  
Keyword(s):  
Composite Resin ◽  
In Vitro Study ◽  
Vitro Study ◽  
Class V ◽  
Composite Resin Restorations ◽  
Resin Restorations

scholarly journals Color Stability of Bulk Fill Composite Resins Submitted to Coffee Staining

2020 ◽  
Vol 24 (1) ◽  
Author(s):  
Beatriz Maria Arruda ◽  
Julio Cesar Bassi ◽  
Rafael Pino Vitti ◽  
Renata Siqueira Scatolin
Keyword(s):  
Analysis Of Variance ◽  
Composite Resin ◽  
Color Change ◽  
In Vitro Study ◽  
Color Stability ◽  
Composite Resins ◽  
Vitro Study ◽  
Change Analysis ◽  
Cie Lab

 Objective: The aim of this in vitro study was to evaluate the color stability of different bulk fill composite resins after extrinsic staining with coffee. Material and methods: Forty-eight disk-shaped specimens (6 mm diameter x 2 mm thick) of each composite resin were prepared for color change test. The composite resins were divided into 4 groups (n=12): one conventional composite resin (Filtek Z250) and three bulk-fill composite resins (Filtek Bulk Fill, Aura Bulk Fill, and Opus Bulk Fill). The samples were stained with 20 mL coffee solution for 7 days, with the solution being replaced every 24 h. The color change analysis was performed using a spectrophotometer, according to the CIE Lab formula. Data were analyzed using the Analysis of variance (ANOVA) and Tukey HSD tests (?=0.05). Results: The results revealed significant differences in color change among the composite resins tested (?<0.0001). The Aura Bulk Fill and Opus Bulk Fill showed the highest color change values. Conclusions: Thus, all the resins analyzed were susceptible to extrinsic staining with coffee, and the Filtek Bulk Fill showed the lowest color change value.

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