Abstract
Background: Composite materials are widely used in aesthetic dental restorations due to their advantages, including minimal invasive preparation, high mechanical strength, adhesive durability, biocompatibility, time and cost-effectiveness. In composite layering techniques, material thickness significantly impacts the aesthetic outcome.
Objectives: This study investigates the effect of enamel-shade composite thickness on the final color values of restorations using a two-layer technique to replace enamel and dentine.
Materials and Method: Forty-five A2 enamel-shade composite discs were created from three composite groups: DenFil (Vericom Corp.), Harmonize (Kerr), and Beautifil II (Shofu Inc.) with five thicknesses: 0.3, 0.5, 1.0, 1.5, and 2.0 mm. Parameters measured included translucency, chroma, value, and color difference. Samples were photographed against black-white backgrounds and a 3.0 mm thick OA3 dentine-shade composite background. Color parameters (L, a, b) were collected using image analysis software to assess translucency, chroma, value, and color difference.
Results: Translucency and chroma were inversely proportional to thickness for the three composite groups. With value, in the DenFil group, increased thickness decreased value, while no statistically significant correlation was found in the other two groups. When comparing the restoration color with the same enamel-shade composite thickness, no significant differences were found between Harmonize and Beautifil II, but DenFil significantly differed.
Conclusion: In the two-layer technique for replacing enamel and dentine, enamel-shade composite thickness affects restoration color characteristics, varying among composite materials.
| Published | 2025-05-09 | |
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| Issue | Vol. 15 No. 2 (2025) | |
| Section | Original Articles | |
| DOI | 10.34071/jmp.2025.2.12 | |
| Keywords | composite thickness, translucency; chroma, value, aesthetic dental restorations |
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright (c) 2025 Hue Journal of Medicine and Pharmacy
Jouhar R, Ahmed MA, Khurshid Z. An Overview of Shade Selection in Clinical Dentistry. Applied Sciences. 2022; 12(14):6841.
Mahn E, Tortora SC, Olate B, Cacciuttolo F, Kernitsky J, Jorquera G. Comparison of visual analog shade matching, a digital visual method with a cross-polarized light filter, and a spectrophotometer for dental color matching. J Prosthet Dent. 2021;125(3):511-6.
Salat JMA. Layers: An Atlas of Composite Resin Stratification. 1st, editor. Italy: QUINTESSENCE PUBLISHING UNITED KINGDOM; 2012.
Ferraris F, Diamantopoulou S, Acunzo R, Alcidi R. Influence of enamel composite thickness on value, chroma and translucency of a high and a nonhigh refractive index resin composite. Int J Esthet Dent. 2014;9(3):382-401.
Bazos P, Magne P. Bio-Emulation: biomimetically emulating nature utilizing a histoanatomic approach; visual synthesis. Int J Esthet Dent. 2014;9(3):330-52.
Dietschi D, Fahl N, Jr. Shading concepts and layering techniques to master direct anterior composite restorations: an update. Br Dent J. 2016;221(12):765-71.
Hein S, Tapia J, Bazos P. eLABor_aid: a new approach to digital shade management. Int J Esthet Dent. 2017;12(2):186-202.
Ismail EH. Color interaction between resin composite layers: An overview. J Esthet Restor Dent. 2021;33(8):1105-17.
Janda R, Roulet JF, Latta M, Kaminsky M, Ruttermann S. Effect of exponential polymerization on color stability of resin-based filling materials. Dent Mater. 2007;23(6):696-704.
Ruyter IE, Nilner K, Moller B. Color stability of dental composite resin materials for crown and bridge veneers. Dent Mater. 1987;3(5):246-51.
Jbara L, Ghoneim M, Ragab H. Influence of the thickness of enamel layer on overall color of composite restoration using different polychromatic composite resins. Egyptian Dental Journal. 2019;65(Issue 4 - October (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)):3769-75.
Kamishima N, Ikeda T, Sano H. Effect of enamel shades on color of layered resin composites. Dent Mater J. 2006;25(1):26-31.
Arimoto A, Nakajima M, Hosaka K, Nishimura K, Ikeda M, Foxton RM, et al. Translucency, opalescence and light transmission characteristics of light-cured resin composites. Dent Mater. 2010;26(11):1090-7.
Schmeling M, MA DEA, Maia HP, EM DEA. Translucency of value resin composites used to replace enamel in stratified composite restoration techniques. J Esthet Restor Dent. 2012;24(1):53-8.
Kang S, Ryu SY, Kim KM, Park SH. Effect of thickness on the translucency of resin-based composites and glass-ceramics. Dent Mater J. 2023;42(1):30-41.
Oivanen M, Keulemans F, Garoushi S, Vallittu PK, Lassila L. The effect of refractive index of fillers and polymer matrix on translucency and color matching of dental resin composite. Biomater Investig Dent. 2021;8(1):48-53.
Ota M, Ando S, Endo H, Ogura Y, Miyazaki M, Hosoya Y. Influence of refractive index on optical parameters of experimental resin composites. Acta Odontol Scand. 2012;70(5):362-7.
Lee YK. Influence of filler on the difference between the transmitted and reflected colors of experimental resin composites. Dent Mater. 2008;24(9):1243-7.
Qian CH, Wang J. Influences of filler content and size on the translucency parameter of resin composites. Shanghai Kou Qiang Yi Xue. 2018;27(1):25-7.
Suh YR, Ahn JS, Ju SW, Kim KM. Influences of filler content and size on the color adjustment potential of nonlayered resin composites. Dent Mater J. 2017;36(1):35-40.
Schmeling M, Meyer-Filho A, de Andrada MA, Baratieri LN. Chromatic influence of value resin composites. Oper Dent. 2010;35(1):44-9.
Friebel M, Pernell O, Cappius HJ, Helfmann J, Meinke MC. Simulation of color perception of layered dental composites using optical properties to evaluate the benefit of esthetic layer preparation technique. Dent Mater. 2012;28(4):424-32.
Ismail EH, Dawson DV, Maia RR. A novel sample design for determining color compatibility between layered resin composite and vita shade guides. J Esthet Restor Dent. 2020;32(1):34-42.
Kim D, Park SH. Color and Translucency of Resin-based Composites: Comparison of A-shade Specimens Within Various Product Lines. Oper Dent. 2018;43(6):642-55.
Paravina RD, Perez MM, Ghinea R. Acceptability and perceptibility thresholds in dentistry: A comprehensive review of clinical and research applications. J Esthet Restor Dent. 2019;31(2):103-12.
Ghinea R, Pérez MM, Herrera LJ, Rivas MJ, Yebra A, Paravina RD. Color difference thresholds in dental ceramics. J Dent. 2010;38 Suppl 2:e57-64.