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Orthodontics and Orthodontology

Microhardness

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Full-Text Articles in Dental Materials

Effect Of Brushing Time With A Whitening Dentifrice On Surface Roughness Of Anterior Composite Resins, Ahmet Hazar, Sinem Akgül, Sibel Koçak, Mustafa Murat Koçak Apr 2022

Effect Of Brushing Time With A Whitening Dentifrice On Surface Roughness Of Anterior Composite Resins, Ahmet Hazar, Sinem Akgül, Sibel Koçak, Mustafa Murat Koçak

Journal of Dentistry Indonesia

Objectives: This study aimed to compare the surface roughness of three anterior composite resins with different filler size, rate, and shape after brushing for 5000, 10000, and 20000 cycles with a whitening dentifrice. Methods: 44 disk-shaped specimens of each material (5mm diameter, 2mm depth) G-aenial Anterior, Harmonize, Asteria were prepared and divided into four groups according to the brushing cycles (Initial, 5000, 10000, and 20000 cycles). Initial surface roughness values (Ra-values) were assessed using a profilometer and measurements were repeated after each brushing cycle. 4 specimens from each composite resin were observed by scanning electron microscopy before and after brushing. …


Effect Of Short- And Long-Term Use Of Home And In-Office Bleaching With Carbamide Peroxide And Hydrogen Peroxide On Enamel Microhardness, Nazila Ameli, Niloofar Kianvash Rad, Farzane Nikpour, Raheb Ghorbani, Shadi Mohebi Aug 2020

Effect Of Short- And Long-Term Use Of Home And In-Office Bleaching With Carbamide Peroxide And Hydrogen Peroxide On Enamel Microhardness, Nazila Ameli, Niloofar Kianvash Rad, Farzane Nikpour, Raheb Ghorbani, Shadi Mohebi

Journal of Dentistry Indonesia

Bleaching is a well-known esthetic dental treatment performed to lighten the tooth shade. Among different cosmetic dental procedures, including direct and indirect tooth-colored restorations, bleaching is likely the most conservative approach. Bleaching has been accepted well by patients and proven as a safe and effective approach. Objective: Tooth bleaching can be conducted at home or in offices. This study was performed to compare the enamel microhardness before bleaching and one and eight weeks after the application of different bleaching agents. Methods: Forty human premolars were randomly divided into four groups, and their buccal surface underwent a Vickers microhardness test …