Faculty Of Dentistry Research Paper

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Browsing Faculty Of Dentistry Research Paper by Author "6th of October City"

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    Accuracy of ceramic restorations made with two CAD/CAM systems
    (2013) Hamza T.A.; Ezzat H.A.; El-Hossary M.M.K.; El Megid Katamish H.A.; Shokry T.E.; Rosenstiel S.F.; Crown and Fixed Prosthodontics Department; Faculty of Dental Medicine; Al-Azhar University; Cairo; Egypt; Crown and Fixed Prosthodontics Department; Faculty of Dental Medicine; MSA University; 6th of October City; Egypt; Crown and Fixed Prosthodontics Department; Faculty of Oral and Dental Medicine; Cairo University; Cairo; Egypt; Division of Restorative and Prosthetic Dentistry; College of Dentistry; Ohio State University; Columbus; OH; United States
    Statement of problem Different types of CAD/CAM systems are currently available, but information regarding which system produces the best marginal fit is lacking. Purpose The purpose of this study was to evaluate the effect of 2 different CAD/CAM systems (Cerec inLab, Kavo Everest) on the marginal fit of 2 types of zirconia-based and lithium disilicate crowns. Material and methods Forty zirconia-based and lithium disilicate crowns, 20 each, were fabricated with the Cerec inLab and Everest CAD/CAM systems on a specially designed stainless steel die to ensure the standardization of specimen shape and dimensions. The vertical marginal fit for all tested crowns was evaluated by using a digital microscope at �100 magnification, and the data were tabulated and statistically analyzed with 2-way ANOVA, followed by the Tukey honestly significant difference (HSD) test with a confidence level of.05 to determine the mean differences. Results The results showed that the CAD/CAM technique, ceramic type, and their interaction had a statistically significant effect on the mean marginal fit of both ceramic types tested. Conclusions Better marginal fit values were exhibited by the Everest CAD/CAM technique for both ceramic types tested. � 2013 The Editorial Council of the Journal of Prosthetic Dentistry.
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    Assessment of three dimensional bone augmentation of severely atrophied maxillary alveolar ridges using prebent titanium mesh vs customized poly-ether-ether-ketone (PEEK) mesh: A randomized clinical trial
    (Blackwell Publishing Ltd, 2019) Mounir M.; Shalash M.; Mounir S.; Nassar Y.; El Khatib O.; Oral and Maxillofacial Surgery; Faculty of Dentistry; Cairo University and New Giza University; Cairo; Egypt; Surgery and Oral Medicine Department; National Research Centre; Cairo; Egypt; Oral and Maxillofacial Surgery; Faculty of Dentistry; MSA University; 6th of October City; Egypt; Oral and Maxillofacial Surgery; Faculty of Dentistry; Cairo University; Cairo; Egypt
    Background: Alveolar bone grafting techniques and dental rehabilitation of patients with maxillary alveolar defects is a very challenging and costly procedure. Various methods have been described to reconstruct these defects in order to facilitate the placement of dental implants. The aim of this study was to assess three dimensional (3D) maxillary ridge augmentation using two innovative, accurate, and time saving protocols. Materials and Methods: Sixteen patients (32 implants) with vertically and horizontally deficient maxillary alveolar ridges, were equally allocated into 2 groups; a mix of particulate autogenous and xenogenic bone grafts loaded in a prebent titanium mesh (Control group) vs patient specific poly-ether-ether ketone meshes (Study group). Radiographic assessment was performed preoperatively, 1 week and 6 months postoperatively. Assessment included measurements of linear changes in the vertical and horizontal dimensions on cross sectional cuts of cone beam computed tomography using special software. Finally; the percentage of 3D bone gain in each group was compared to that of the other. Results: Wound healing was uneventful for all cases except one patient in each group were the meshes were exposed 2 weeks' postsurgery. There was no statistical significance between both groups (P value = 0.2). Conclusion: Within the limitations of the sample size of this study, both techniques could be used as a successful method of ridge augmentation with no statistical significance between them. � 2019 Wiley Periodicals, Inc.