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This study was aimed to evaluate the effect of thickness (1, 2, 3, and 4 mm) on the translucency of resin-based composites (RBCs) and glass-ceramics, and compare the influence of the thickness of those materials on the translucency parameter (TP) value. The materials were divided into two groups, eight RBCs in Group 1 and five glass-ceramics in Group 2 and TP, ΔL*, Δa*, and Δb* were compared. Statistically significant differences were present in the 2, 3, and 4 mm in the TP, in the 2 and 4 mm in ΔL*, and in all thicknesses in Δa* and Δb* betweent the two groups. The TP of RBCs and glass-ceramics decreased as thickness increased, especially from 1 mm to 2 mm. The TP values of the RBCs were more significantly decreased as the thickness of the material increased from 2 mm to 4 mm than those of the glass-ceramics.
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http://dx.doi.org/10.4012/dmj.2022-093 | DOI Listing |
Materials (Basel)
August 2025
Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, 115 27 Athens, Greece.
The aim of this study was to evaluate (a) the degree of conversion (DC%), (b) film thickness, and (c) the effect of film thickness on DC% in modern light-cured resin composite restoratives [Filtek Universal (F), Clearfil Majesty ES 2 Universal (M), Tetric EvoCeram (T) and Viscalor (V)] used for luting composite onlays before/after preheating. For (a), the luting composites placed at 150 μm film thickness under the onlays (4 mm thickness, 2.9% transmittance) were light-cured for 120 s (3 × 40 s top, buccal, lingual sites) before and after preheating (54 °C/5 min-F,M,T and 65 °C/30 s-V).
View Article and Find Full Text PDFObjective: To investigate clinical significance, rate of genetic anomalies and fetal malformations in fetuses with dilated jugular lymphatic sacs (JLS) in the first trimester, overall and according to nuchal translucency (NT) thickness.
Methods: Retrospective multicenter cohort study of fetuses with dilated JLS at the first trimester scan. NT thickness, genetic evaluation, and fetal malformation data were collected.
Dent J (Basel)
August 2025
Department of Life Science, Health and Health Professions, Link Campus University, 00165 Rome, Italy.
This study aimed to investigate the influence of shade and thickness on the polymerization of SDR flow+, a low-viscosity bulk-fill composite, by assessing its degree of conversion (DC). An in vitro study was conducted using SDR flow+ composite resin. Specimens were prepared at two thicknesses (2 mm and 4 mm) and four shades (Universal, A1, A2, A3).
View Article and Find Full Text PDFJ Dent
August 2025
Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Thailand. Electronic address:
Objective: This study evaluated how ceramic translucency, resin cement shade, and tooth substrate color influence the masking ability of lithium disilicate veneers, aiming to support evidence-based clinical decision-making.
Methods: IPS e.max CAD ceramics (high, medium, and low translucency) and Variolink Esthetic LC resin cements (four shades) were paired in all combinations and bonded to either A3Dentin (natural dentin, control) or C4Dentin (discolored dentin, experimental) resin composite substrates.
Dent Mater
August 2025
Department of Prosthodontics and Materials Science, Leipzig University, Liebigstraße 12, Leipzig 04103, Germany.
Objectives: The aim of this study was to analyze the optical properties of current CAD/CAM silicate glass-ceramics and the context of their structural properties.
Methods: Different glass-ceramics (VITABLOCS Mark II, Nice, Celtra Duo, IPS e.max CAD) were prepared at the manufacturer-specific translucency level (LT/MT/HT/O2/O1) in disc form (0.