We tested some resin-based composites used in dentistry for their estrogenic activity. A sealant based on bisphenol-A diglycidylether methacrylate (bis-GMA) increased cell yields, progesterone receptor expression, and pS2 secretion human estrogen-target, serum-sensitive MCF7 breast cancer cells. Estrogenicity was due to dimethacrylate, monomers found the base paste of dental identified by mass spectrometry. Samples saliva from 18 subjects treated with 50 mg a bis-GMA-based applied molars...

The chemical structure of hydroxylated diphenylalkanes or bisphenols consists two phenolic rings joined together through a bridging carbon. This class endocrine disruptors that mimic estrogens is widely used in industry, particularly plastics. Bisphenol F, bisphenol A, fluorine-containing A (bisphenol AF), and other were found to be estrogenic bioassay with MCF7 human breast cancer cells culture (E-SCREEN assay). Bisphenols promoted cell proliferation increased the synthesis secretion...

Most of the composites and sealants used in dentistry are based on bisphenol A diglycidylether methacrylate (Bis-GMA). Reports revealed that situ polymerization is not complete free monomers can be detected by different analytic methods. Concerns about estrogenicity (BPA) other aromatic components leached from commercial products have been expressed. We studied biphenolic eluted seven one sealant before after vitro using HPLC gas chromatography/mass spectrometry we investigated how pH...

To evaluate the influence of printing orientation on color and translucency 3D restorative resins. Four resin systems in available shades (DFT-Detax Freeprint Temp- A1, A2,A3; FP-Formlabs Permanent Crown- A2,A3,B1,C2; FT- Formlabs Temporary CB- GCT-GC Temporary- Light, Medium) were evaluated. Three samples (10×10×1.2 mm) from each material printed at two different orientations (0° 90°) polished to 1.00 ± 0,01 mm thickness. Spectral reflectance was measured against black background using a...

To evaluate the influence of thickness and printing angle on optical properties 3D-printed dental restorative resins.Four 3D resin systems were evaluated: DFT-Detax Freeprint Temp; FP- Formlabs Permanent Crown; Temporary CB; GCT- GC Temporary-. Samples from each material printed at 0° 90°, polished up to 0.5, 1.0, 1.5 2.0 mm thickness. Scattering (S), absorption (K) albedo (a) coefficients, transmittance (T%), light reflectivity (RI) infinite (X∞) calculated using Kubelka-Munk's model. Data...

We tested some resin-based composites used in dentistry for their estrogenic activity. A sealant based on bisphenol-A diglycidylether methacrylate (bis-GMA) increased cell yields, progesterone receptor expression, and pS2 secretion human estrogen-target, serum-sensitive MCF7 breast cancer cells. Estrogenicity was due to dimethacrylate, monomers found the base paste of dental identified by mass spectrometry. Samples saliva from 18 subjects treated with 50 mg a bis-GMA-based applied molars...

Background: The final goal of color measurement or shade specification in dentistry is the reproduction by prosthetic materials all important appearance characteristics natural oral structures. application science an objective way to measure and evaluate such structures dental clinical practice research. Methods: Literature on was reviewed present new metrics differences Visual acceptability perceptibility values are whiteness indexes describe presented. Results: In last decade, CIELAB...

Abstract Objectives This study aims to evaluate in vivo the color agreement between natural teeth and dental shade guides by means of visual instrumental coverage error ( $$\mathrm{CE}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>CE</mml:mi></mml:math> ) index. Materials methods The middle third 735 incisors was visually determined two evaluators using Vita Classical (VC) 3D Master (V3DM) guides. match tooth tab rated as poor (P), good (G), or optimum (O) each observer....

The objective of this study was to obtain a geographic world map scientific production in dentistry by analysing published papers. Articles and reviews the Dentistry, Oral Surgery &amp; Medicine category from 1999 2003 were accessed through ISI database. data analyzed quantitatively (number documents, number researchers, productivity, interannual variation rate relative specialization index), qualitatively (weighted impact factor, citation per document top 5 publications) socioeconomically...

This study sought to assess the significance of corrections introduced in new CIEDE2000 color difference formula with respect deltaE*ab. The purpose which was provide sounder knowledge, and hence more informed decision-making, about applying this dental resin composites. With two different hybrid composites, differences were calculated between unpolymerized polymerized composites thicknesses (1 2 mm), cured halogen LED light curing units (LCUs). formulas differed significantly, VAB(E) (equal...

Abstract Objectives To evaluate the effect of thickness on color and translucency a multi‐color polymer‐infiltrated ceramic‐network (PICN) material. Methods Specimens 0.5, 1.0, 1.5 mm thicknesses were obtained by sectioning VITA ENAMIC® multiColor (E‐MC) High Translucent CAD‐CAM blocks (1M1‐HT, 1M2‐HT, 2M2‐HT, 3M2‐HT, 4M2‐HT). Spectral reflectance coordinates measured white black backgrounds using spectroradiometer, CIE D65 illuminant 45°/0° geometry. CIEDE2000 differences (Δ E 00 ΔTP )...

To assess the quality of randomized clinical trial (RCT) reports published in Endodontics between 1997 and 2012.Retrieval RCTs was based on a search Thomson Reuters Web Science (WoS) database (March 2013). Quality evaluation performed using checklist Jadad criteria, CONSORT (Consolidated Standards Reporting Trials) statement SPIRIT (Standard Protocol Items: Recommendations for Interventional Trials). Descriptive statistics were used frequency distribution data. Student's t-test Welch test to...

Tooth bleaching is becoming increasingly popular among patients and dentists since it a relatively noninvasive approach for whitening lightening teeth. Instruments visual assessment with respect to commercial shade guides are currently used evaluate tooth color. However, the association between these procedures imprecise degree of color change after known vary substantially studies; there no objective guidelines predict effectiveness tooth-bleaching treatment. We propose new methodology...