Modification of Luminescence Characteristics of Porcelain by Using Silicon Carbide

Tavakoli, Mitra and Nourbakhsh, Seyed Mohammad Sadegh and Moztarzadeh, Fathallah and Sepahvandi, Azadeh (2016) Modification of Luminescence Characteristics of Porcelain by Using Silicon Carbide. Journal of Mashhad Dental School, 40 (4). pp. 325-334.

JMDS_Volume 40_Issue 4_Pages 365-370.pdf

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Introduction: Ideal restorative esthetic dental materials should have similar properties of light reflection, scattering, and fluorescence as those of natural teeth. Natural teeth emit a strong blue fluorescence when exposed to ultraviolet (UV) light, which makes natural teeth seem whiter and brighter in daylight. The unique structure of natural teeth is the most important constraint for simulation of restorative materials. The purpose of this study was to simulate dentinal tubule and evaluate the effect of different percentages of porosity on the luminescence properties of dental porcelain. Materials & Methods: In this in vitro study, we prepared a control sample (without silicon carbide) and three dental porcelain samples with different percentages of porosity by adding 0, 1, 2 and 3 silicon carbide (SiC). Their luminescence intensities were measured by spectrophotometer and compared with that of natural tooth. Results: With the increase of porosity, the luminescence property improved. The maximum luminescence intensity was observed in the samples with 3 SiC, while the lowest intensity was found in the 1 sample. Conclusion: Porosity within dental porcelains reduces refraction and reflection, and therefore, such samples under exposure to UV light show higher luminescence intensity.

Item Type: Article
Subjects: WU Dentistry. Oral surgery
Divisions: Journals > Journal of Mashhad Dental School
Depositing User: jmds jmds
Date Deposited: 20 Sep 2017 12:30
Last Modified: 20 Sep 2017 12:30

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