{"title":"不透明树脂复合材料与高半透明氧化锆复合材料在变色基材上的遮盖能力。","authors":"Shuping Chen, Lei Jiang, Run Chen","doi":"10.1111/jerd.70007","DOIUrl":null,"url":null,"abstract":"<p><strong>Objective: </strong>This study evaluated the masking ability of combined opaque resin composite and high-translucency zirconia on severely discolored substrates.</p><p><strong>Methods: </strong>Four types of discolored substrates (ND8, ND9, cobalt-chromium alloy, and black) were coated with opaque resin composite at six thicknesses (0, 0.10, 0.15, 0.20, 0.25, and 0.30 mm), with an A2-shade substrate serving as the reference. High-translucency zirconia discs (0.5, 0.8, and 1.0 mm; n = 10) were subsequently layered over each specimen. Color differences (ΔE<sub>00</sub>) were determined with a spectroradiometer and calculated according to the CIEDE2000 formula. A two-way ANOVA with Tukey's test (α = 0.05) assessed color differences.</p><p><strong>Results: </strong>Both zirconia and resin thickness significantly affected ΔE<sub>00</sub> values (p < 0.001). The minimum thickness combinations achieving ΔE<sub>00</sub> below the acceptability threshold were: ND8 (0.25 mm resin +0.8 mm zirconia), ND9 (0.3 + 1.0 mm), and Co-Cr (0.25 mm + 1.0 mm). None of the tested combinations successfully masked the black substrate.</p><p><strong>Conclusion: </strong>The thickness of the opaque resin composite has a significant impact on its masking performance. The combined application of opaque resin composite and high-translucency zirconia can effectively mask severely discolored substrates, with the outcome depending on the type of substrate.</p><p><strong>Clinical significance: </strong>This study provides a quantifiable strategy for masking severely discolored substrates using minimal restorative thickness. Especially in esthetic zones where tooth preparation is limited, applying an optimally thick opaque resin composite beneath high-translucency zirconia enables a practical and minimally invasive esthetic restoration while preserving as much natural tooth structure as possible.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":" ","pages":""},"PeriodicalIF":4.1000,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Masking Ability of the Combined Application of Opaque Resin Composite and High-Translucency Zirconia on Discolored Substrates.\",\"authors\":\"Shuping Chen, Lei Jiang, Run Chen\",\"doi\":\"10.1111/jerd.70007\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objective: </strong>This study evaluated the masking ability of combined opaque resin composite and high-translucency zirconia on severely discolored substrates.</p><p><strong>Methods: </strong>Four types of discolored substrates (ND8, ND9, cobalt-chromium alloy, and black) were coated with opaque resin composite at six thicknesses (0, 0.10, 0.15, 0.20, 0.25, and 0.30 mm), with an A2-shade substrate serving as the reference. High-translucency zirconia discs (0.5, 0.8, and 1.0 mm; n = 10) were subsequently layered over each specimen. Color differences (ΔE<sub>00</sub>) were determined with a spectroradiometer and calculated according to the CIEDE2000 formula. A two-way ANOVA with Tukey's test (α = 0.05) assessed color differences.</p><p><strong>Results: </strong>Both zirconia and resin thickness significantly affected ΔE<sub>00</sub> values (p < 0.001). The minimum thickness combinations achieving ΔE<sub>00</sub> below the acceptability threshold were: ND8 (0.25 mm resin +0.8 mm zirconia), ND9 (0.3 + 1.0 mm), and Co-Cr (0.25 mm + 1.0 mm). None of the tested combinations successfully masked the black substrate.</p><p><strong>Conclusion: </strong>The thickness of the opaque resin composite has a significant impact on its masking performance. The combined application of opaque resin composite and high-translucency zirconia can effectively mask severely discolored substrates, with the outcome depending on the type of substrate.</p><p><strong>Clinical significance: </strong>This study provides a quantifiable strategy for masking severely discolored substrates using minimal restorative thickness. Especially in esthetic zones where tooth preparation is limited, applying an optimally thick opaque resin composite beneath high-translucency zirconia enables a practical and minimally invasive esthetic restoration while preserving as much natural tooth structure as possible.</p>\",\"PeriodicalId\":15988,\"journal\":{\"name\":\"Journal of Esthetic and Restorative Dentistry\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":4.1000,\"publicationDate\":\"2025-07-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Esthetic and Restorative Dentistry\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1111/jerd.70007\",\"RegionNum\":3,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"DENTISTRY, ORAL SURGERY & MEDICINE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Esthetic and Restorative Dentistry","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1111/jerd.70007","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
Masking Ability of the Combined Application of Opaque Resin Composite and High-Translucency Zirconia on Discolored Substrates.
Objective: This study evaluated the masking ability of combined opaque resin composite and high-translucency zirconia on severely discolored substrates.
Methods: Four types of discolored substrates (ND8, ND9, cobalt-chromium alloy, and black) were coated with opaque resin composite at six thicknesses (0, 0.10, 0.15, 0.20, 0.25, and 0.30 mm), with an A2-shade substrate serving as the reference. High-translucency zirconia discs (0.5, 0.8, and 1.0 mm; n = 10) were subsequently layered over each specimen. Color differences (ΔE00) were determined with a spectroradiometer and calculated according to the CIEDE2000 formula. A two-way ANOVA with Tukey's test (α = 0.05) assessed color differences.
Results: Both zirconia and resin thickness significantly affected ΔE00 values (p < 0.001). The minimum thickness combinations achieving ΔE00 below the acceptability threshold were: ND8 (0.25 mm resin +0.8 mm zirconia), ND9 (0.3 + 1.0 mm), and Co-Cr (0.25 mm + 1.0 mm). None of the tested combinations successfully masked the black substrate.
Conclusion: The thickness of the opaque resin composite has a significant impact on its masking performance. The combined application of opaque resin composite and high-translucency zirconia can effectively mask severely discolored substrates, with the outcome depending on the type of substrate.
Clinical significance: This study provides a quantifiable strategy for masking severely discolored substrates using minimal restorative thickness. Especially in esthetic zones where tooth preparation is limited, applying an optimally thick opaque resin composite beneath high-translucency zirconia enables a practical and minimally invasive esthetic restoration while preserving as much natural tooth structure as possible.
期刊介绍:
The Journal of Esthetic and Restorative Dentistry (JERD) is the longest standing peer-reviewed journal devoted solely to advancing the knowledge and practice of esthetic dentistry. Its goal is to provide the very latest evidence-based information in the realm of contemporary interdisciplinary esthetic dentistry through high quality clinical papers, sound research reports and educational features.
The range of topics covered in the journal includes:
- Interdisciplinary esthetic concepts
- Implants
- Conservative adhesive restorations
- Tooth Whitening
- Prosthodontic materials and techniques
- Dental materials
- Orthodontic, periodontal and endodontic esthetics
- Esthetics related research
- Innovations in esthetics