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05). Overall highest color change was obtained in tea followed by coffee and Coca-cola. The least color change was observed in the samples exposed to artificial saliva (control group) ( < 0.05). Surface roughness and color change were time dependent as both increased with time. Furthermore, greater the surface roughness, more was the color change observed in all the groups at all tested time intervals. Surface roughness and color change were time dependent as both increased with time. Furthermore, greater the surface roughness, more was the color change observed in all the groups at all tested time intervals. Dental caries is an infectious microbial disease caused by acidogenic bacteria. It leads to the dissolution of enamel, dentin, and cementum. Enamel demineralization is often appreciated as' 'White Chalky lesions or Chalky enamel''. Standard procedures for protection of these teeth are fissure sealing and topical fluoride application. A varnish is generally a material in which a resin such as copal is dissolved within an organic solvent such as ethanol. Gold is one of the most biocompatible dental materials. Gold nanoparticles were biosynthesised using aspartic acid in previous studies. To prepare a gold nanoparticle based dental varnish and to evaluate its re-mineralizing capacity. Gold nanoparticle dental varnish was prepared using all the necessary constituents. This newly prepared dental varnish was compared with G.C Fuji/SnF2 dental varnish. Demineralizing capacity of the dental varnishes were analysed. The tooth specimens were prepared according to methodology and mounted on resin blocks. They weresuperior to dental varnishes like SnF2 dental varnish. https://www.selleckchem.com/products/pt2385.html Further research needs to be done in vitro to better modify the AuNP dental varnish before proceeding to in vivo studies. The objective of this study was to evaluate and compare the cytotoxicity and genotoxicity of different universal adhesive systems in the mouse fibroblast cell line L929. L929 (mouse fibroblast) cells were exposed to G-Premio Bond (GPB) (GC Europe, Belgium), Prime&Bond Universal (Dentsply Sirona, USA), Universal Bond Quick (Kuraray, USA), Single Bond (SB) Universal (3M ESPE, USA), and Tokuyama Universal Bond (TB) (Tokuyama, USA). Cell viability was assessed by the 2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide test, whereas oxidative DNA damage was assessed by determining the 8-hydroxydeoxyguanosine level using an enzyme-linked immunoassay kit. Statistical analysis was performed by one-way analysis of variance, followed by Bonferroni tests. Cytotoxic and genotoxic effects of TB and SB Universal groups were significantly higher than the other groups ( < 0.05). Among the adhesives tested, GPB (93.0 ± 1.3) had the least cytotoxicity, while TB (67.3 ± 3.0) had the most cytotoxic effect. In terms of genotoxicity, GPB (2.2 ± 0.3) had the least genotoxic effect, while Tokuyama Bond Universal (4.17 ± 0.4) had the most genotoxic effect. Universal adhesive systems used in dentistry have cytotoxic and genotoxic effects in live cells. Universal adhesive systems should, therefore, be used with caution due to their cytotoxic and genotoxic effects in clinical applications. Universal adhesive systems used in dentistry have cytotoxic and genotoxic effects in live cells. Universal adhesive systems should, therefore, be used with caution due to their cytotoxic and genotoxic effects in clinical applications. This study aims to compare the color stability of white mineral trioxide aggregate (wMTA) in contact with four irrigating solutions. Original research study. Fifty cylindrical discs of wMTA, 10 mm in diameter and 2 mm in height were prepared using a mold. Samples were incubated at a temperature of 37°C and at 100% humidity for the material to reach its optimal mechanical properties. The samples were divided into 6 groups Group A dry ( = 5); Group B distilled water (DW) ( = 5); Group C 5% sodium hypochlorite (NaOCl) ( = 10); Group D 2% chlorhexidine gluconate (CHX) ( = 10); Group E 17% aqueous ethylene diamine tetra-acetic acid (EDTA) ( = 10); Group F 0.2% Chitosan ( = 10) Each disc was immersed into the irrigating solution for a period of 24 h. All the specimens were photographed using a digital camera before and after immersion. The assessment of color change of each disc of wMTA was conducted by a spectrophotometer. The Commission Internationale de l'eclairage system was used to calculate the differences in color. Statistical Package for the Social Sciences version 16.0 (Chicago, IL, USA) at a significance level of < 0.05 was used. All groups except group A exhibited discoloration of wMTA. The mean values for change in color was highest with Group D, followed by Group C, F, E, B, and group A. Only Group B when compared to group A did not show any statistically significant difference ( = 0.948) whereas all the other four groups showed a highly statistically significant difference ( < 0.001). 2% CHX causes maximum discoloration of wMTA followed by 5% NaOCl, 0.2% Chitosan and least discoloration with 17% aqueous EDTA and DW. 2% CHX causes maximum discoloration of wMTA followed by 5% NaOCl, 0.2% Chitosan and least discoloration with 17% aqueous EDTA and DW. Two important aspects of the dental operating microscope (DOM) that factor into its overall effectiveness are resolution and depth of field. Therefore, the objective of this study was to evaluate and compare the resolution and depth of field of DOMs from three well-known manufacturers using standardized test targets. A resolution test, using the 1951 USAF Hi-Resolution Target (Edmund Optics, Barrington, NJ), and a depth of field test, using the Depth of Field Target 5-15 (Edmund Optics, Barrington, NJ), were performed by two calibrated observers. Three DOM systems such as Seiler IQ (Seiler Instrument Inc., St. Louis, USA), Global G-Series 6 step (Global Surgical Corp., St. Louis, USA), and Zeiss Extaro 300 (Carl Zeiss Meditec AG, Oberkochen, Germany) were used to compare the resolution and depth of field. The Zeiss Extaro 300 showed the highest maximum resolution and maximum DOF (64 lp/mm and 17mm, respectively). The Seiler IQ showed the lowest maximum resolution and maximum DOF (35.9 lp/mm and 11 mm, respectively).
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