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Fatigue resistance of machine milled ceramic posterior occlusal veneers with new preparation designs versus conventional design : 3D finite element analysis : in-vitro study / Samaa Nagy Kotb ; Supervised Atef Shaker Ibrahim , Carl Hany Halim

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Samaa Nagy Kotb , 2018Description: 178 P. : charts , photographs ; 25cmOther title:
  • مقاومة القشرة الاطباقية الخلفية المخروطة ميكانيكيا من السيراميك بتصميمات تحضيرية جديدة للاجهاد مقارنة بالتصميم التقليدي : تحليل العناصر المحدودة ثلاثي الأبعاد : دراسة معملية [Added title page title]
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Dissertation note: Thesis (Ph.D.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics Summary: The present study was designed to evaluate the effect of different occlusal veneer preparation designs of CAD/CAM generated Zirconia reinforced Lithium Silicate (ZLS) , on fatigue resistance and stress distribution using Finite Element Analysis (FEA) method. A total of fifty four human mandibular molars were prepared to receive ZLS Occlusal veneers with three different preparation designs and accordingly were divided into three groups (n=18): Group I (Conventional Design): Planar occlusal veneer preparation design. Group II (Occlusal veneer with circumferential preparation): Modified occlusal veneer preparation design with circumferential finish line. Group III (Occlusal veneer with intracoronal cavity extension): Modified occlusal veneer preparation design with intracoronal extension. All samples' Occlusal veneers were constructed from Zirconia reinforced Lithium Silicate Ceramic blocks (Vita Suprinity) using the CEREC CAD/CAM system. All samples were subjected to Step Stress test on a universal testing machine to determine fatigue resistance. All the data were collected, tabulated and statistically analyzed. Microscopic examination of fractured samples was carried out using the stereomicroscope and the scanning electron microscope to determine modes of failure. Stress distribution was evaluated by 3D Finite element analysis test. 3D digital model was generated by CBCT scanning and Reverse engineering. The components of the model were assembled using Solidworks software and then imported in ANSYS software to carry out the analysis
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Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.09.09.Ph.D.2018.Sa.F (Browse shelf(Opens below)) Not for loan 01010110079237000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.09.09.Ph.D.2018.Sa.F (Browse shelf(Opens below)) 79237.CD Not for loan 01020110079237000
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Cai01.09.09.Ph.D.2018.Sa.E Evaluation of patient satisfaction and shade matching of vita suprinity versus lithium disilicate (E-max) ceramic crowns in esthetic zone : Randomized controlled clinical trial / Cai01.09.09.Ph.D.2018.Sa.E Evaluation of patient satisfaction and shade matching of vita suprinity versus lithium disilicate (E-max) ceramic crowns in esthetic zone : Randomized controlled clinical trial / Cai01.09.09.Ph.D.2018.Sa.F Fatigue resistance of machine milled ceramic posterior occlusal veneers with new preparation designs versus conventional design : 3D finite element analysis : in-vitro study / Cai01.09.09.Ph.D.2018.Sa.F Fatigue resistance of machine milled ceramic posterior occlusal veneers with new preparation designs versus conventional design : 3D finite element analysis : in-vitro study / Cai01.09.09.Ph.D.2019.Ah.E Effect of polyether ether ketone (PEEK) housing verses metallic housing of ball and socket attachment on patient satisfaction and retention of mandibular implant retained overdentures : Randomized clinical trial / Cai01.09.09.Ph.D.2019.Ah.E Effect of polyether ether ketone (PEEK) housing verses metallic housing of ball and socket attachment on patient satisfaction and retention of mandibular implant retained overdentures : Randomized clinical trial / Cai01.09.09.Ph.D.2019.Am.M Maintenance and cost effectiveness of cendres metaux locator (CM-LOC) resin matrix versus ball nylon matrix attachment retaining single implant mandibular complete overdentures : A randomized clinical trial /

Thesis (Ph.D.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Prosthodontics

The present study was designed to evaluate the effect of different occlusal veneer preparation designs of CAD/CAM generated Zirconia reinforced Lithium Silicate (ZLS) , on fatigue resistance and stress distribution using Finite Element Analysis (FEA) method. A total of fifty four human mandibular molars were prepared to receive ZLS Occlusal veneers with three different preparation designs and accordingly were divided into three groups (n=18): Group I (Conventional Design): Planar occlusal veneer preparation design. Group II (Occlusal veneer with circumferential preparation): Modified occlusal veneer preparation design with circumferential finish line. Group III (Occlusal veneer with intracoronal cavity extension): Modified occlusal veneer preparation design with intracoronal extension. All samples' Occlusal veneers were constructed from Zirconia reinforced Lithium Silicate Ceramic blocks (Vita Suprinity) using the CEREC CAD/CAM system. All samples were subjected to Step Stress test on a universal testing machine to determine fatigue resistance. All the data were collected, tabulated and statistically analyzed. Microscopic examination of fractured samples was carried out using the stereomicroscope and the scanning electron microscope to determine modes of failure. Stress distribution was evaluated by 3D Finite element analysis test. 3D digital model was generated by CBCT scanning and Reverse engineering. The components of the model were assembled using Solidworks software and then imported in ANSYS software to carry out the analysis

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