Comparative Evaluation of the Masking Ability of Lithium Disilicate Ceramic with Different Core Thickness on the Shade Match of Indirect Restorations over Metallic Substrate: An In vitro Study
| Autor: | Hariharan Ramakrishnan, Jayakrishnakumar Sampathkumar, Hariharan Ramasubramanian, N S Azhagarasan, Chitra Shankar Krishnan, Priyadarshini Thilagar |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Masking (art)
lab Materials science spectrophotometer Orthodontics translucency Heat-pressed ceramic Metal 030207 dermatology & venereal diseases 03 medical and health sciences 0302 clinical medicine Lithium disilicate In vitro study Ceramic Composite material L*a*b nickel-chromium 030206 dentistry masking ability Cementation (geology) Core (optical fiber) lcsh:RK1-715 visual_art lcsh:Dentistry visual_art.visual_art_medium Periodontics Original Article lithium disilicate Oral Surgery Metallic substrate |
| Zdroj: | Contemporary Clinical Dentistry Contemporary Clinical Dentistry, Vol 10, Iss 1, Pp 56-63 (2019) |
| ISSN: | 0976-2361 0976-237X |
| Popis: | Purpose: The purpose of this in vitro study was to comparatively evaluate the masking ability of lithium disilicate ceramic with different core thickness on the shade match of indirect restorations over metallic substrate. Materials and Methods: A total of 30 heat pressed lithium disilicate ceramic discs of low translucency were fabricated with diameter 10mm and thickness of 1 mm, 1.3 mm and 1.6mm with each thickness consisting of 10 samples to be used in the study. Thirty Ni-Cr metal discs of diameter 10mm were used to simulate metallic substrates .The colour difference of the lithium disilicate ceramic disc before and after cementation were measured using CIE LAB system. Results: The mean colour difference (ΔE) of Group I,Group II, Group III before cementation with the Ni-Cr metal discs was 17.32,13.01 and 11.73 respectively. The mean colour difference (ΔE) of Group I,Group II, Group III after cementation with the Ni-Cr metal discs was 16.32,12.10, 11.05 respectively. Conclusion: The mean colour difference of the three groups were found to be more than the clinically acceptable perceptibility threshold (ΔE < 3.3) indicative of reduced masking ability of all the three groups of ceramic discs over metallic substrate used in this study. |
| Databáze: | OpenAIRE |
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