Egyptian American Medical Center

Purpose: This experiment got conducted to test the influence of two different intrapulpal extensions (4mm,6mm) On fracture resistance of endo-crowns restoring Maxillary premolar teeth using Zirconia Reinforced Lithium Disilicate (Vita Suprinity).Materials and methods: 14 sound premolars were assigned to two groups (n=14), Group A (4 mm extension into the pulp chamber), Group B (6 mm extension intrapulpally).All premolars were decoronated to be 3 mm above the CEJ Proximally.After cementation, fracture resistance test was performed.Data was collected and wasstatistically analyzed.. Results:Results were significantly different between samples regarding different intrapulpal extensions were the highest value of fracture resistance was found in samples with 6 mm extension depth (2419.14±733.46)followed by samples with 4 mm depth (1961.71±659.89). Conclusion:From the results obtained from this study, it could be concluded that endodontically treated premolars can be restored with endocrowns, moreover, the increase of the preparation depth of the endocrowns showed a massive increase in fracture resistance

Background To study the endothelial cell layer 3 months after Descemet membrane endothelial keratoplasty (DMEK) using specular microscopy to provide data about the endothelial cell density (ECD), endothelial cell loss (ECL) percentage, and changes in endothelial cell shape (hexagonality) and size [coefficient of variation (CV)] and to study the factors causing these changes in endothelial cell layer after DMEK. Patients and methods This study included 20 patients investigated by specular microscopy 3 months after DMEK. We discuss the postoperative ECD, factors that affect the ECD, factors that affect hexagonality and CV, visual outcome, and advantages of DMEK. The study was approved by the ethics committee of Ain Shams University. Results This study showed that the mean ECD postoperative was 1664.80 cells/mm2, with mean ECL of 34.67%. This cell loss increased in cases of difficult graft unfolding. Donor age and preservation time had no effect on postoperative ECD. A percentage decrease in hexagonal cells and a percentage increase in CV were noticed in cases that received grafts from donors with history of diabetes mellitus. Postoperative ECD and hexagonal cell percentage had no correlation with central corneal thickness in this study. Conclusion DMEK results in significant improvement of postoperatively visual acuity (VA). Advantages of DMEK like no corneal sutures, short recovery time, less cylindrical aberration, decreased incidence of graft rejection, and good visual outcome make it the best choice to treat eyes with corneal endothelial dysfunction.

Background: Breast cancer is the most frequent cancer in women and the second leading cause of death among them. Breast lesions were first categorized as benign or cancerous. Objective: was to highlight the role of noninvasive diagnostic breast modalities including mammography, ultrasound, conventional MRI and MRI diffusion imaging in detection and characterization of suspicious breast lesions. Methodology: It was a hospital based cross sectional study done on total number of 50 female patients presented by breast lump or nipple discharge, some of them were referred from surgical department and others from out-patient clinic to the radiology department at Met Ghamr oncology center, after receiving clearance from the institute's ethical council, the study was carried out for two years, from June 2019 to August 2021. Before being included in the trial, all patients provided informed permission. They were subjected for imaging by digital mammography, ultrasonography and MRI mammography. Results: The study revealed that in the evaluation and description of worrisome breast lesions, MRI mammography plays a leading role over digital mammography and ultrasonography. Conclusion: MRI mammography outperformed digital mammography and ultrasonography regarding of sensitivity, specificity, and diagnostic performance.