Effect of Tropical Fruit Juices on Surface Roughness of Tooth Coloured Restorative Materials

Surface sealants are reported to ensure surface smoothness and improve the surface quality of composite restorations. These sealants should also reduce the bacterial adhesion on composite surfaces however, there is not much information regarding their performance on bulk-fill composite materials. The aim of this study was to evaluate the effect of surface sealant application on surface roughness and bacterial adhesion of various restorative materials. Disc-shaped samples were prepared from a compomer, a conventional composite and three bulk-fill composites. Specimens of each group were divided into two groups (n = 9): with/without surface sealant (Biscover LV, [BLV]). Surface roughness values were examined by profilometry and two samples of each group were examined for bacterial adhesion on a confocal laser scanning microscope (CLSM). Bacterial counts were calculated by both broth cultivation and microscopic images. Results were analyzed with one-way ANOVA and Bonferroni/Dunn tests. Following the BLV application, there was a decrease in the surface roughness values of all groups however, only Tetric N-Ceram Bulk and Beautifil-Bulk groups showed significantly smoother surfaces (p < 0.001). There were no significant differences among material groups without BLV application. Evaluating bacterial adhesion after BLV application, conventional composite had the lowest values among all followed by the compomer group. Beautifil-Bulk had significantly the highest bacterial adhesion (p < 0.05), followed by Tetric N-Ceram Bulk group. Without BLV application, there was no significant difference among bacterial adhesion values of groups (p > 0.05). CLSM images showed cell viability in groups. Bulk-fill composites showed higher bacterial adhesion than conventional composite and compomer materials. The surface sealant was found to be highly effective in lowering bacterial adhesion, but not so superior in smoothing the surfaces of restorative materials. So, surface sealants could be used on the restorations of patients with high caries risk.

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The behaviour of composites, glass ionomers and compomers in erosive conditions – in vitro study

Acta Medica Marisiensis ◽

10.2478/amma-2014-0042 ◽

2014 ◽

Vol 60 (5) ◽

pp. 200-203

Author(s):

Andreea Borş ◽

Cristina Molnar-Varlam ◽

Melinda Székely

Keyword(s):

Surface Roughness ◽

Wear Resistance ◽

Erosive Wear ◽

In Vitro Study ◽

Vitro Study ◽

Initial Surface ◽

Dental Filling ◽

Filling Materials ◽

Restorative Materials

Abstract Objective: The aim of this in vitro study was to evaluate the influence of erosive conditions on the wear resistance of aesthetic direct restorative materials. Methods: Six dental filling materials were tested: two composites (Filtek Z550 and X-tra fil), two compomers (Dyract Extra and Twinky Star) and two glass ionomers (Ketac Molar and Fuji II LC). Twenty disks (10mm×2mm) of each material were prepared (n=120) and kept in artificial saliva at 37˚C for 24 hours. Specimens were cycled in acidic soft drink (Coca-Cola) 5×/day, for 5’, over 30 days. Initial surface roughness ISR (Ra-μm) and final surface roughness FSR were measured using a profilometer. The wear rate was calculated as difference of final minus the initial roughness (ΔSR=FSR-ISR). For statistical analysis t-test and one-way ANOVA test were used by GraphPad Prism version 5.03 statistical software. The level of significance was set at p<0.05. Results: The erosive wear rates (mean±SD, μm) after exposure to acidic beverage were: 0.30±0.03 (Ketac Molar), 0.28±0.04 (Fuji II LC), 0.27±0.00 (Filtek Z550), 0.23±0.01 (X-tra fil), 0.20±0.00 (Twinky Star) and 0.14±0.01 Dyract Extra, respectively. There were significant differences between the tested materials (p<0.05). Conclusions: Dental filling materials had different behaviour under the same erosive condition, however all investigated aesthetic restorative materials showed surface degradation. These findings suggest that erosive wear resistance of tooth coloured restoratives could influence their longevity in intraoral acidic conditions. Acknowledgements: The study was supported by the Internal Research Grant no. 5/30.01.2013 of the University of Medicine and Pharmacy of Tirgu Mureş.

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Influence of different light-curing units on the surface roughness of restorative materials: in situ study

Materials Research ◽

10.1590/s1516-14392007000300006 ◽

2007 ◽

Vol 10 (3) ◽

pp. 253-256

Author(s):

Juliane Cristina Ciccone-Nogueira ◽

Wanessa Christine de Souza-Zaroni ◽

Michelle Alexandra Chinelatti ◽

Regina Guenka Palma-Dibb

Keyword(s):

Surface Roughness ◽

In Situ Study ◽

Restorative Materials ◽

Light Curing

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Bioadhesive Curcumin-Mediated Photodynamic Inactivation and Its Potential to Cause Undesirable Effects on Dental and Restorative Surfaces

Pharmaceutics ◽

10.3390/pharmaceutics13091458 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1458

Author(s):

Bárbara Donadon Reina ◽

Carolina Santezi Neto ◽

Patrícia Petromilli Nordi Sasso Garcia ◽

Marlus Chorilli ◽

Giovana Maria Fioramonti Calixto ◽

...

Keyword(s):

Surface Roughness ◽

Liquid Crystal ◽

Tooth Enamel ◽

Dental Enamel ◽

Color Stability ◽

Composite Resins ◽

Photodynamic Inactivation ◽

Restorative Material ◽

Negative Effects ◽

Restorative Materials

Curcumin-mediated Photodynamic Inactivation (PDI) has shown great potential to disinfect specific sites on tooth enamel but may involve contact with restorative materials. Thus, before use in dentistry, it is necessary to investigate whether the PDI protocol causes undesirable changes in the surfaces of aesthetic restorative materials and dental enamel. This study investigated the effect of PDI mediated by curcumin (CUR) in a liquid crystal precursor system on color stability (ΔE), surface roughness (Ra), and microhardness (kgf) of three different composite resins and bovine dental enamel specimens. The microhardness and roughness readings were performed 60 days after the treatments while the color readings were performed immediately, 24, 48, and 72 h, 7, 14, 21, 30, and 60 days after the treatments. Results showed that CUR mediated-PDI does not seem to have the potential to promote any esthetic or mechanical changes to the surface of tooth enamel and can be applied safely in clinical practice. However, the results on color, roughness, and hardness obtained for composite resins show that some negative effects can be produced, depending on the type of restorative material; more experiments must be performed with different formulations and, perhaps, with lower concentrations of CUR.

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Sugar-Tasting Ability and Fruit Selection in Tropical Fruit-Eating Birds

The Auk ◽

10.1093/auk/104.2.173 ◽

1987 ◽

Vol 104 (2) ◽

pp. 173-179 ◽

Cited By ~ 55

Author(s):

Douglas J. Levey

Keyword(s):

Plant Species ◽

Fruit Juice ◽

Fruit Juices ◽

Sugar Concentration ◽

Apparent Difference ◽

Tropical Fruit ◽

Handling Technique

Abstract The sugar-tasting abilities of four species of tanagers and two species of manakins were tested. Three tanager species were able to detect differences in diets containing 8%, 10%, and 12% sugar. In pairwise choice trials, they preferred the diet highest in sugar. Neither species of manakin discriminated among the three diets. This apparent difference in tasting abilities of tanagers and manakins may be a result of their fruit-handling techniques. Tanagers crush fruits in their bills, thereby releasing juices onto their tongues. Manakins swallow fruits whole; their tongues rarely encounter fruit juice. Hence, manakins' fruit-handling technique is poorly suited for sensing the taste cues in fruit juices. Variation in fruit sugar concentration is common within and among plant species and is great enough to be detected by birds. Birds probably have selected for sweeter fruits.

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Analysis of the surface roughness and microhardness of dental restorative materials exposed to heat sources and cold temperatures for human identification purposes

Egyptian Journal of Forensic Sciences ◽

10.1186/s41935-019-0114-x ◽

2019 ◽

Vol 9 (1) ◽

Author(s):

Roberto Cesar Biancalana ◽

Sergio Augusto de Freitas Vincenti ◽

Ricardo Henrique Alves da Silva ◽

Fernanda Carvalho Panzeri Pires-de-Souza

Keyword(s):

Surface Roughness ◽

Human Identification ◽

Heat Sources ◽

Cold Temperatures ◽

Dental Restorative Materials ◽

Restorative Materials ◽

Dental Restorative

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Effect of Different Acidic Beverages on Microhardness of Nanohybrid Composite, Giomer, and Microhybrid Composite

World Journal of Dentistry ◽

10.5005/jp-journals-10015-1380 ◽

2016 ◽

Vol 7 (3) ◽

pp. 126-128

Author(s):

SK Somayaji ◽

Arul Amalan

Keyword(s):

Oral Cavity ◽

Hardness Test ◽

Experimental Models ◽

Soft Drinks ◽

Fruit Juices ◽

Complex Phenomenon ◽

Significant Difference ◽

Restorative Materials ◽

Nanohybrid Composite ◽

Acidic Beverages

ABSTRACT Introduction Degradation in the oral cavity is a complex phenomenon, i.e., related to disintegration and dissolution of restorative materials in the oral cavity. Consumption of acidic food, fruit juices, and soft drinks can result in decrease in microhardness and bad esthetic appearance. Materials and methods Twenty-four disk-shaped specimens (10 mm in diameter and 2 mm thickness) were made from each nanohybrid composite, giomer, and microhybrid composite. The specimens were dipped in Appy fizz, Nimbooz, and Thumbs Up for 50 seconds and washed with saline. This cycle was continued for six times each day. Such hardness test was carried out in regular intervals, that is, 7, 14, and 21 days. Results There was reduction in hardness after 7 and 14 days but no significant difference (p > 0.05). There was significant difference after 21 days of experimental models for giomer, ceramic, and spectra (p < 0.05). Conclusion The microhardness of materials was reduced after 7 and 14 days, but significant difference was seen after 21 days. How to cite this article Somayaji SK, Amalan A, Ginjupalli K. Effect of Different Acidic Beverages on Microhardness of Nanohybrid Composite, Giomer, and Microhybrid Composite. World J Dent 2016;7(3):126-128.

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