Evaluation of the colour and translucency parameter of conventional and Computer-aided design and computer-aided manufacturing (CAD-CAM) feldspathic porcelains after staining and laser-assisted bleaching.

Autor:	Chitsaz F; Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran., Ghodsi S; Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran., Harehdasht SA; Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran., Goodarzi B; Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran., Zeighami S; Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Jazyk:	angličtina
Zdroj:	Journal of conservative dentistry : JCD [J Conserv Dent] 2021 Nov-Dec; Vol. 24 (6), pp. 628-633. Date of Electronic Publication: 2022 Apr 01.
DOI:	10.4103/jcd.jcd_273_21
Abstrakt:	Aims: The present study aimed to evaluate the color and translucency changes of the feldspathic porcelain samples made using the conventional or computer-aided design/computer-aided manufacturing (CAD/CAM) methods after immersion in staining solutions and laser bleaching. Materials and Methods: A total of 72 samples of feldspathic porcelain were fabricated using the conventional ( n = 36) or CAD/CAM ( n = 36) methods. Afterward, each group was randomly divided into three subgroups ( n = 12), which underwent exposure to coffee, orange juice, or distilled water for 6 weeks. Then, the samples underwent diode laser-assisted bleaching. A spectrophotometer assessed the samples' color and translucency preintervention, after staining, and after bleaching. Statistical Analysis Used: One-way and two-way analysis of variance and independent t -test were used. The significance level was 0.05. Results: Staining for 6 weeks significantly changed the color of both types of feldspathic porcelains. Furthermore, there were significant differences between the ceramics made using different methods and immersed in different staining solutions ( P < 0.001). Furthermore, laser-assisted bleaching changed the color of immersed specimens significantly ( P = 0.005). However, there were no significant translucency changes in all the subgroups after staining ( P = 0.215) and laser bleaching ( P = 0.325). Conclusions: The staining-induced discoloration of all the subgroups was in the clinically acceptable range (ΔΕ<3.3). In addition, bleaching could effectively remove the stains in both types of ceramics while not affecting the primary color. Moreover, the translucency of the ceramics was not affected by staining or laser-assisted bleaching. Competing Interests: There are no conflicts of interest. (Copyright: © 2022 Journal of Conservative Dentistry.)
Databáze:	MEDLINE
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