Browsing by Author "Zidan A.Z."

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    Effect of water sorption and solubility on color stability of bulk-fill resin composite
    (Jaypee Brothers Medical Publishers (P) Ltd, 2018) Mansouri S.A.; Zidan A.Z.; Faculty of Dentistry; Umm AlQura University; Makkah; Saudi Arabia; Department of Biomaterials; Faculty of Dentistry; University for Modern Sciences and Arts; Cairo; Egypt; Department of Restorative Dentistry; Umm AlQura University; Makkah; Saudi Arabia
    Aim: The objective of this study is to compare the bulk-fill resin composite to a conventional one, as regards; water sorption, solubility, and their effect on color stability. Materials and methods: This study was conducted using two types of composites: Bulk-fill composite (Filtek Bulk-Fill) and nanohybrid composite for control (Filtek Z250 XT). Specimens were prepared using a ring mold, 10 from each material. Specimens were desiccated, then weighed in a digital balance until a stable mass was acquired. For water sorption test, specimens were immersed in distilled water and placed in a lightproof incubator at 37 � 1�C and the mass was measured weekly for 8 weeks. For solubility test, specimens were desiccated again in the desiccator until a stable mass was achieved. A spectrophotometer was used to record the baseline color measurements prior to water immersion and weekly for 8 weeks. Results: Bulk-fill composite showed higher water sorption value and lower water solubility values compared with that of the conventional one. No statistically significant difference was found for water sorption (p = 0.104) or water solubility (p = 0.098) between groups. The mean ?E was lower in bulk-fill than conventional composite, and results showed a statistically significant difference (p = 0.009). Conclusion: Bulk-fill resin composite yielded better color stability and similar water sorption and solubility values. Clinical significance: Bulk-fill resin composite can be used in esthetically concerned patients. � The Journal Of The Contemporary Dental Practice.
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    Sealing Ability of Four Calcium Containing Cements used for Repairing Furcal Perforations in Primary Molars: An in vitro study
    (2015) El-Khodary H.M.; Farsi D.J.; Farsi N.M.; Zidan A.Z.; Department of Biomaterials; Faculty of Dentistry; October University for Modern Sciences and Arts; Egypt; Department of Restorative Dentistry; Biomaterials Division; Faculty of Dentistry; Umm AlQura University; Jeddah; Saudi Arabia; Department of Biomaterials; Faculty of Dentistry; October University for Modern Sciences and Arts; Egypt; Department of Restorative Dentistry; Biomaterials Division; Faculty of Dentistry; Umm AlQura University; Jeddah; Saudi Arabia; Department of Biomaterials; Faculty of Dentistry; October University for Modern Sciences and Arts; Egypt; Department of Restorative Dentistry; Biomaterials Division; Faculty of Dentistry; Umm AlQura University; Jeddah; ; Saudi Arabia; Department of Biomaterials; Faculty of Dentistry; October University for Modern Sciences and Arts; Egypt; Department of Restorative Dentistry; Biomaterials Division; Faculty of Dentistry; Umm AlQura University; Jeddah; ; Saudi Arabia
    AIM: The aim of this study was to compare the sealing ability of mineral trioxide aggregate (MTA), Portland cement (PC), Biodentine(TM) and Tech biosealer in repairing furcal perforations in primary molars using the fluid-filtration technique.MATERIALS AND METHODS: Fifty freshly extracted maxillary second primary molars were sectioned horizontally at the furcation region to create dentin disks of 1.5 mm (+ 0.1 mm) thickness. Five disks were not perforated and served as negative controls. In the remaining 45 disks, furcation perforations were prepared. Five disks did not receive furcation repair and served as positive controls. The remaining 40 disks were then randomly divided into four equal groups (10 disks in each group). Perforations were repaired with: MTA, PC, Biodentine(TM) or Tech Biosealer. The sealing ability of the tested materials was evaluated by measuring microleakage for each disk after four different storage periods: 24-hour, 1-month, 6-month and 1-year storage using fluid-filtration. Comparisons between the four materials and the four time periods were done using the two-way analysis of variance and the Scheffe multiple comparisons test.RESULTS: There was no significant difference between the mean microleakage values obtained in the four tested materials after 24 hours, 1, 6 month and 1 year. However, microleakage values for each individual material were significantly higher at 24 hours than at the other time intervals.CONCLUSION: Mineral trioxide aggregate, PC, Biodentine(TM) and Tech biosealer showed similar capabilities in sealing the furcal perforations of the primary molars, where the sealing ability improved over time for each individual material.