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논문 기본 정보

자료유형
학술저널
저자정보
Iravani Maryam (Department of Restorative Shahid Beheshti University of Medical Sciences Faculty of Dentistry Tehra) Shamszadeh Sayna (Dental Research Center Research Institute of Dental Sciences Shahid Beheshti University of Medical) Panahandeh Narges (Dental Research Center Research Institute of Dental Sciences Shahid Beheshti University of Medical) Sheikh-Al-Eslamian Seyedeh Mahsa (Dental Research Center Research Institute of Dental Sciences Shahid Beheshti University of Medical) Torabzadeh Hassan (Dental Research Center Research Institute of Dental Sciences Shahid Beheshti University of Medical)
저널정보
대한치과보존학회 Restorative Dentistry and Endodontics Restorative Dentistry and Endodontics 제45권 제3호
발행연도
2020.1
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1 - 7 (7page)

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Objectives: This study aimed to evaluate the ability of lithium disilicate ceramics to reproduce the A2 shade and to mask A4 substrates. Materials and Methods: Twenty-four discs (8 mm in diameter, shade A2) of high translucency (groups 1?3) and low translucency (groups 4?6) of IPS e.max ceramic with different thicknesses (0.5, 0.75, and 1 mm) were fabricated as monolithic structures. In addition, discs of medium opacity (group 7?8) with different core/veneer combinations (0.3 mm/0.7 mm and 0.5 mm/0.5 mm) were fabricated as bilayer structures. Specimens were superimposed on an A4 substrate (complex). The color changes of the complex were measured using a spectrophotometer on a black background, and the ΔE values of the complex were compared with either the A4 substrate or the A2 shade tab. One-way analysis of variance, the Tukey honest significant difference test, and the Fisher test were used to analyze the data (p < 0.05). Results: Significant between-group differences were found for comparisons to both the A4 substrate and the A2 shade (p < 0.05). When compared with the A4 substrate, the ΔE values in all groups were in the non-acceptable range. When compared with the A2 shade, the ΔE values in all groups, except groups 2 and 3, were in the clinically acceptable range. Conclusions: All translucencies and thicknesses masked the underlying dark substrate. However, the low-translucency IPS e.max Press better reproduced the A2 shade.

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