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Influence of finish line design on the vertical marginal discrepancy and fracture resistance of enamic hybrid ceramic : In vitro study / Ashraf Mohammad Ayman Dabbousi ; Supervised Rabab Mohammed Ibrahim , Rana Mahmoud Sherif

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Ashraf Mohammad Ayman Dabbousi , 2015Description: 86 P. : charts , facsimiles ; 25cmOther title:
  • تأثير شكل خط الانهاء على التباين الحافي العمودي و مقاومة الانكسار للسيراميك المهجن - إينامك : دراسة مخبرية [Added title page title]
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Dissertation note: Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics Summary: This study was conducted to evaluate the effect of finish line design on theMarginal fit, and fracture resistance of the Hybrid ceramic Vita Enamic. According to the sample size calculation, a total of 16 crowns were constructed. The samples were divided into two equal groups (n=8) according to the finish line design: Group (A): 8 samples (n=8) Chamfer finish line design1mm (Ac). Group (B): 8 samples (n=8) Shoulder finish line design 1mm (Bs). Two stainless steel dies were machine milled to simulate a tooth preparation for a ceramic crown of a mandibular second molarwith two finish line configurations 1mm chamfer and 1 mm shoulder. Each die was 6-mm in height, 8-mm in cervical diameter, 6mm in occlusal diameter and had a total occlusal convergence of 16o. Digitalization of both dies and milling of hybrid restorations was made using CAD-CAM technology .The stainless steel dies were duplicated into epoxy resin ones using Silicone impression material, and the marginal gap was evaluated on the stainless steel dies using digital microscope,while fracture resistance was measured using epoxy resin die with the corresponding hybrid restoration. The restorations were surface treated according to the manufacturer{u2019}s instructions, and cemented on the epoxy resin dies using self-adhesive resin cement, after 24 hours of storage in distilled water, the fracture resistance of the restorations was measured using universal testing machine with load of 5 kN and at a cross head speed of 1mm/min
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Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.09.09.M.Sc.2015.As.I (Browse shelf(Opens below)) Not for loan 01010110069047000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.09.09.M.Sc.2015.As.I (Browse shelf(Opens below)) 69047.CD Not for loan 01020110069047000
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Cai01.09.09.M.Sc.2015.Ah.I Influence of eugenol containing temporary cement on bonding total-etch versus self-adhesive resin cements to dentin = تأثير اللاصق المؤقت المحتوى على مادة الايجينول على قوة ربط اللاصق الراتنجى الكلى مقارنة باللاصق الراتنجى الذاتى بالعاج / Cai01.09.09.M.Sc.2015.Am.E The effect of using retention silicon on abutment{u2019}s bone level and mobility in mandibular overdentures : Randomized clinical trial / Cai01.09.09.M.Sc.2015.Am.E The effect of using retention silicon on abutment{u2019}s bone level and mobility in mandibular overdentures : Randomized clinical trial / Cai01.09.09.M.Sc.2015.As.I Influence of finish line design on the vertical marginal discrepancy and fracture resistance of enamic hybrid ceramic : In vitro study / Cai01.09.09.M.Sc.2015.As.I Influence of finish line design on the vertical marginal discrepancy and fracture resistance of enamic hybrid ceramic : In vitro study / Cai01.09.09.M.Sc.2015.Ay.E Evaluation of marginal discrepancy and microleakage of lava ultimate (resin nano ceramic) versus lithium disilicate IPS E.max CAD endocrowns : In vitro study / Cai01.09.09.M.Sc.2015.Ay.E Evaluation of marginal discrepancy and microleakage of lava ultimate (resin nano ceramic) versus lithium disilicate IPS E.max CAD endocrowns : In vitro study /

Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics

This study was conducted to evaluate the effect of finish line design on theMarginal fit, and fracture resistance of the Hybrid ceramic Vita Enamic. According to the sample size calculation, a total of 16 crowns were constructed. The samples were divided into two equal groups (n=8) according to the finish line design: Group (A): 8 samples (n=8) Chamfer finish line design1mm (Ac). Group (B): 8 samples (n=8) Shoulder finish line design 1mm (Bs). Two stainless steel dies were machine milled to simulate a tooth preparation for a ceramic crown of a mandibular second molarwith two finish line configurations 1mm chamfer and 1 mm shoulder. Each die was 6-mm in height, 8-mm in cervical diameter, 6mm in occlusal diameter and had a total occlusal convergence of 16o. Digitalization of both dies and milling of hybrid restorations was made using CAD-CAM technology .The stainless steel dies were duplicated into epoxy resin ones using Silicone impression material, and the marginal gap was evaluated on the stainless steel dies using digital microscope,while fracture resistance was measured using epoxy resin die with the corresponding hybrid restoration. The restorations were surface treated according to the manufacturer{u2019}s instructions, and cemented on the epoxy resin dies using self-adhesive resin cement, after 24 hours of storage in distilled water, the fracture resistance of the restorations was measured using universal testing machine with load of 5 kN and at a cross head speed of 1mm/min

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