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  • Original Article

    Effect of artificial accelerated aging on surface roughness and color stability of different ceramic restorations

    Tamer A. Hamza , Ahmed A. Alameldin , Ahmed Y. Elkouedi , Alvin G. Wee
    Aim: The purpose of the study was to evaluate the effect of artificial accelerated aging on surface roughness and color stability of three recently introduced CAD/CAM materials. The hypothesis was that artificial accelerated aging would have an effect on surface roughness and color stability of tested materials. Methods: A total of 21 ceramic discs were fabricated in this study, including translucent zirconia (InCoris TZI) and resin nano ceramic (Lava Ultimate) ceramic blocks for CAD/CAM and a set of bi-layered discs made of a zirconia CAD/CAM substructure (inCoris ZI) with VM9 hand-layered...
    Published on: 31 Mar 2017
    Views: 1491
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  • Original Article

    Effect of processing technique and coping thickness on fracture resistance of lithium disilicate copings

    Mohamed H. Riad , Jihan F. Younis , Hanaa H. Zaghloul
    Aim: The purpose of this in vitro study was to determine the optimum margin thickness which allows more conservative tooth preparation, thus giving space for the veneer material and to evaluate the effect of the processing technique on fracture resistance of IPS e.max® copings. Methods: Forty all lithium disilicate copings were divided into 2 equal groups according to the construction technique; twenty copings each (n = 20) per group. Each group was further subdivided into 2 equal subgroups according to the coping margin thickness; 0.5 mm and 0.7 mm (n = 10/subgroup). Two dies were prepared...
    Published on: 31 Mar 2017
    Views: 1156
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  • Original Article

    Evaluation effect of asthma on dentoalveolar morphology among children group

    Salwa Mohamed Awad , Tarek El-Desoky , Hanaa Mahmoud Shalan , Fathi Abdulraqep Qasem
    Aim: The aim of this study was to evaluate the effect of asthma on dentoalveolar morphology in the developing child. Methods: This study was conducted on 50 asthmatic Egyptian children and 50 non-asthmatic Egyptian children. Each child’s dental casts of the maxilla and mandible were analyzed. The upper and lower intercanine width, the upper and lower inter-molar width (UIMW-LIMW), the upper and lower arch length, and the palatal depth were determined. Results: Children with asthma demonstrated higher mean values in more than one of the parameters measured when compared with the mean values...
    Published on: 31 Mar 2017
    Views: 910
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  • Editorial

    A foreword from the Editor-in-Chief

    Jiiang-Huei Jeng
    Published on: 31 Mar 2017
    Views: 559
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  • Original Article

    Stem cell markers as a resource to predict prognosis of betel quid induced oral squamous cell carcinoma: an immunohistochemical investigation

    Primali Jayasooriya , Champika Fernando , Anura Suraweera , Upul Dissanayake
    Aim: The study was to correlate the survival of a group of Sri Lankan betel quid induced oral cancer patients with the expression patterns of five cancer stem cell (CSC) markers namely ALDH1, Sox-2, Bmi-1, C-met, and Oct-4. Methods: Archival tissues of 140 oral squamous cell carcinomas (OSCCs) were stained with CSC markers, ALDH1, Sox-2, Bmi-1, C-met, and Oct-4. Survival analysis was performed with SPSS version 20, using Kaplan-Meier survival curves and significance with chi-square test and Breslow’s (generalized Wilcoxon) test. Results: Immunohistochemical investigations revealed 55.7%,...
    Published on: 31 Mar 2017
    Views: 455
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  • Original Article

    A novel approach to reinforce provisional material using silica gel powder

    Tamer A. Hamza , Ahmed H. Sherif , Elsayed A. Abdalla
    Aim: To evaluate a novel approach for reinforcing 2 types of provisional restoration materials [polymethylmethacrylate (PMMA) and bis-acryl resin] with different concentrations of silica gel powder (0%, 0.5%, 1%, 1.5%, 3%, 5%, 10% by weight). Methods: A total of 60 rectangular fracture toughness specimens were prepared in this study according to the ISO 13586 Standard with dimensions of 2 mm × 5 mm × 25 mm. The specimens were divided into 2 groups according to the materials used PMMA or bis-acryl. Each subgroup was divided into 6 subgroups according to the different silica gel...
    Published on: 31 Mar 2017
    Views: 427
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