Hussein, G., wagdy, N., nasser, M. (2020). Effect of Different Beaching Protocols on Biaxial Flexural Strength and Micro Hardness of Two Ceramic Materials. test, 66(Issue 4 - October (Fixed Prosthodontics, Removable Prosthodontics and Dental Materials)), 2563-2573. doi: 10.21608/edj.2020.40787.1230
Ghada abdelfattah Hussein; nourhan wagdy; mohamed nasser. "Effect of Different Beaching Protocols on Biaxial Flexural Strength and Micro Hardness of Two Ceramic Materials". test, 66, Issue 4 - October (Fixed Prosthodontics, Removable Prosthodontics and Dental Materials), 2020, 2563-2573. doi: 10.21608/edj.2020.40787.1230
Hussein, G., wagdy, N., nasser, M. (2020). 'Effect of Different Beaching Protocols on Biaxial Flexural Strength and Micro Hardness of Two Ceramic Materials', test, 66(Issue 4 - October (Fixed Prosthodontics, Removable Prosthodontics and Dental Materials)), pp. 2563-2573. doi: 10.21608/edj.2020.40787.1230
Hussein, G., wagdy, N., nasser, M. Effect of Different Beaching Protocols on Biaxial Flexural Strength and Micro Hardness of Two Ceramic Materials. test, 2020; 66(Issue 4 - October (Fixed Prosthodontics, Removable Prosthodontics and Dental Materials)): 2563-2573. doi: 10.21608/edj.2020.40787.1230

Effect of Different Beaching Protocols on Biaxial Flexural Strength and Micro Hardness of Two Ceramic Materials

Egyptian Dental Journal
Article 14, Volume 66, Issue 4 - October (Fixed Prosthodontics, Removable Prosthodontics and Dental Materials), October 2020, Pages 2563-2573    PDF (645.89 K)
Document Type: Original Article
DOI: 10.21608/edj.2020.40787.1230
Authors
Ghada abdelfattah Hussein* 1; nourhan wagdy2; mohamed nasser3
110 abo dawood el zahery st
2fixed prosothodontics departement faculty of dentistry ain shams university
3restorative departement. faculty of dentistry. Ainshams university
Abstract
Purpose: The aim of this study was to evaluate the effect of different bleaching protocols on biaxial flexural strength and micro hardness of two ceramic materials.
Material and Methods: A total of 112 discs, 56 discs of each material, were prepared from Celtra® Duo and VITA ENAMIC® with 10mm diameter and 1.2mm thickness. Each material was divided into 4 groups (n=14) according to the bleaching protocol done: Group 1 Control group “no bleaching”, Group 2 home bleaching “Carbamide Peroxide 22%”, Group 3 home bleaching “Hydrogen Peroxide 14%” and Group 4 In-office bleaching using diode Laser. For each material, half the number of discs in each group (n=7) were subjected to Biaxial Flexural Test using Universal Testing Machine Instron-3345 together with Instron BlueHill® universal software, while the other half was subjected to Micro-Hardness Test using Tukon™ 1102 Wilson® Hardness Tester. Data was represented by mean and standard deviation (SD) values. Two-way ANOVA was used to study the effect of different tested variables and their interaction on biaxial flexural strength (Mpa) and micro-hardness, The significance level was set at p ≤0.05 within all tests. Statistical analysis was performed with IBM® SPSS® Statistics Version 26 for Windows.
Results: For Biaxial Flexural Strength and Micro-hardness; Celtra duo samples had a significantly higher value than samples made with Vita Enamic for all bleaching groups.
Conclusion: Bleaching resulted in a significant diminution for both biaxial flexural strength and surface micro-hardness of Celtra Duo and Vita Enamic.
Keywords
bleaching techniques; laser bleaching Vitaenamic; Celtra Duo; flexural strength and Micro hardness
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