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Effect Of Different Cad/Cam Techniques On Marginal Accuracy, Color Matching And Retention Of Cemented Versus Screw Retained Implant-Supported Crowns., Latifa Elbanna, Eman Essam, Mohamed Al-Yasaky, Hisham Katamish
Effect Of Different Cad/Cam Techniques On Marginal Accuracy, Color Matching And Retention Of Cemented Versus Screw Retained Implant-Supported Crowns., Latifa Elbanna, Eman Essam, Mohamed Al-Yasaky, Hisham Katamish
Al-Azhar Journal of Dentistry
Purpose: Evaluating the effect of different computer aiding designing/computer aiding manufacturing techniques on marginal accuracy, color matching and retention of cemented versus screw retained implant-supported crowns. Materials and Methods: Thirty six zirconia implant supported crowns were constructed and divided according to mode of retention into two groups (n=18/group);GpI:Implants supported crowns cement retained to customized zirconia abutments. GpII : Implant-supported crowns screwed directly to implant analogs. Each of the two groups were further subdivided according to mode of veneering into three subgroups(n=6/group).(IA)Full Contoured cement retained zirconia crowns (IB)Solid Zirconia copings veneered by Hand layering&(IC)Solid Zirconia coping veneered by Heat pressed ingots.(IIA)Full …
Comparative Study Between Monolithic Translucent Zirconia (Y-Tzp) And Ips Empress 2 In Marginal Fit And Fracture Strength, Soad Hemdan, Sahar Abd El-Aziz, Zienb El-Sharkwy
Comparative Study Between Monolithic Translucent Zirconia (Y-Tzp) And Ips Empress 2 In Marginal Fit And Fracture Strength, Soad Hemdan, Sahar Abd El-Aziz, Zienb El-Sharkwy
Al-Azhar Journal of Dentistry
Abstract :Purpose : The aim of this study was to compare between Monolithic Translucent Zirconia (Y-TZP) and IPS e.max press in marginal fit and fracture strength. Materials and methods, forty ceramic crowns were fabricated, : Then divided into 4 groups: Group A: Ten monolithic TZI CAD/CAM zirconia crowns (n=10) Group B: Ten monolithic IPS e.max press crowns (n=10), Group C: Ten veneered ZI CAD/CAM zirconia core (n=10), Group D: Ten veneered IPS e.max press core (n=10),then Each group was subdivided into two subgroups: Subgroup 1: Samples not subjected to thermocycling (n=5) as control. Subgroup 2: Samples subjected to thermocycling (n=5). …
Cytotoxicity Evaluation Of Three Biocompatible And Bioactive Retrofilling Materials Using Periodontal Ligament Stem Cells: An In-Vitro Study, Safwat Elwaseef, Wael Kamel, Mahmoud Ahmed
Cytotoxicity Evaluation Of Three Biocompatible And Bioactive Retrofilling Materials Using Periodontal Ligament Stem Cells: An In-Vitro Study, Safwat Elwaseef, Wael Kamel, Mahmoud Ahmed
Al-Azhar Journal of Dentistry
This study aimed to: evaluate the biocompatibility of Mineral Trioxide Aggregate (MTA) versus Biodentine and Retro MTA extracts at three observation periods (24h, 48h, and 72h) using MTT-Essay.Methods: 72 wells in three culture insert plates were used in this study. MTA, Biodentine and Retro MTA cements were evaluated in a fresh state. Cells at passage four of human periodontal ligament cells were included in this study. After cells preparation and culturing, an extract of the three tested materials was prepared and cultured with the complete media in addition to 1×104 cells were implanted into each well 24 h earlier and …
Impact Of Hydrofluoric Acid Etching Duration On Translucency, Flexural Strength And Surface Topography Of Lithium Silicate Based Glass Ceramic, Hend Abdel Hadi, Mona Mandour, Sahar Mokhtar
Impact Of Hydrofluoric Acid Etching Duration On Translucency, Flexural Strength And Surface Topography Of Lithium Silicate Based Glass Ceramic, Hend Abdel Hadi, Mona Mandour, Sahar Mokhtar
Al-Azhar Journal of Dentistry
Purpose: The purpose of the present study is to assess the effect of different hydrofluoric acid etching durations on the translucency, flexural strength and surface topography of a lithium silicate-based glass ceramic (LS). Materials and Methods: Forty LS (Obsidian) samples will were constructed and divided into four groups (n=10 each) according the duration of hydrofluoric acid (HF) application including group (I); (control) as received samples without surface treatment, group (II); ceramic surfaces etched with HF for 10 seconds; following the manufacturer’s recommendations, group (III); ceramic surfaces etched with HF for 30 seconds and group (IV); ceramic surfaces etched with HF …
Effect Of Reinforcement Of Denture Base Resin With Zirconia On Bacterial Colonization And Some Mechanical Properties, Marwa Ebida, Dina Kholief, Shereen Kabeel
Effect Of Reinforcement Of Denture Base Resin With Zirconia On Bacterial Colonization And Some Mechanical Properties, Marwa Ebida, Dina Kholief, Shereen Kabeel
Al-Azhar Journal of Dentistry
AbstractPurpose: The aim of the study was to compare between zirconia reinforced acrylic resins with that conventional acrylic resins (PMMA) regarding bacterial colonization and some mechanical properties (flexural strength, surface roughness, and surface hardness). Material and methods: Clinical study: sixteen completely edentulous patients were randomly selected which their ages ranged from 50-60 years. Patients were divided into two groups. Patients in the first group received maxillary and mandibular complete denture made of PMMA (Group І) and patients in the second group received maxillary and mandibular complete denture made of ZrO2 reinforced acrylic resins (Group ІІ). Microbial biofilm was evaluated after …
Evaluation Of The Effect Of Irrigating Solutions On Push Out Bond Strength Of Bio-Ceramic And Resin Based Endodontic Sealers, Fatma Fouda, Mohsen Nor. Eden, Mahmoud Hassan
Evaluation Of The Effect Of Irrigating Solutions On Push Out Bond Strength Of Bio-Ceramic And Resin Based Endodontic Sealers, Fatma Fouda, Mohsen Nor. Eden, Mahmoud Hassan
Al-Azhar Journal of Dentistry
Purpose: This study was designed to assess the impact of irrigating solutions on push out bond strength of Bio- ceramic and Resin Based Endodontic Sealers. Materials and Methods: sixty extracted human teeth with straight single root and canal were prepared with RACE FKG rotary files till size 35 taper 06. The samples were dispensed into two experimental groups according to root canal sealer used (30 samples each). group1 Total Fill Bio-ceramic sealer after irrigation with, and Group 2: AH Plus sealer. The specimens were further randomly divided into two sub groups (15 samples each) according to the final irrigation solution …
The Effect Of Poly Amido Amine Denderimer Pretreatment Alone Or With Nano Hydroxyapatite Containing Adhesive On The Integrity Of Resin Dentin Bond After Ph Cycling., Fadia Shosha, Mohamed Al-Yasaky, Nevin Gad
The Effect Of Poly Amido Amine Denderimer Pretreatment Alone Or With Nano Hydroxyapatite Containing Adhesive On The Integrity Of Resin Dentin Bond After Ph Cycling., Fadia Shosha, Mohamed Al-Yasaky, Nevin Gad
Al-Azhar Journal of Dentistry
Purpose: The purpose of the current study was to evaluate the effect of poly amidoamine dendrimer pretreatment alone and with Nanohydroxy apatite containing adhesive on the integrity of resin dentin bond as affected by PH Cycling . Materials and Methods: A total of eighty dentin samples were divided into four main (A) groups according to the material used where in (A1) group: (PAMAM –NH2) alone, (A2) group: HA containing adhesive alone,(A3) group :Combination of (PAMAM-NH2 +HA adhesive),(A4) group: The control adhesive alone .And each of (A) groups were further subdivided into two (B) groups according to PH Cycling where (B1) …
Effect Of Zirconia And Alumina Nanofillers On The Microstructure And Some Properties Of Flowable Composite, Heba Abd El- Hafez, Muhammed Masoud, Heba El Tayeb
Effect Of Zirconia And Alumina Nanofillers On The Microstructure And Some Properties Of Flowable Composite, Heba Abd El- Hafez, Muhammed Masoud, Heba El Tayeb
Al-Azhar Journal of Dentistry
Purpose:studying the effect of reinforcing flowable composite with different concentrations of zirconia and alumina nanofillers on its microstructure, complex viscosity, colour changes, flexural strength and degree οf cοnversiοn.Materials and Methods:180 samples were divided according to nanofillers type into two groups(n=90),each group was subdivided into five subgroups according to concentration of fillers (0%,2%,4%,8%and16%)(n=20). Each group was subdivided into 4 subdivisions according to type of test performed(n=5).Samples were characterized by SEM, viscosity was measured by oscillatory rheοmeter, colour changes was measured using spectrophotometer, fǀexural strength was measured by three point bending test and degree of conversion was measured by FTΙR.Results: SEM showed …
Evaluation Of Chelating Potential Of Chitosan Citrate And Chitosan Acetate On Intraradicular Dentin, Shaimaa Naem, Mervat Fawzy, Hagar Abdelnaby
Evaluation Of Chelating Potential Of Chitosan Citrate And Chitosan Acetate On Intraradicular Dentin, Shaimaa Naem, Mervat Fawzy, Hagar Abdelnaby
Al-Azhar Journal of Dentistry
Purpose: This study was designed to evaluate the chelating potential of chitosan citrate and chitosan acetate on intraradicular dentin using (ESEM) and quantity calcium content of intraradicular dentin using (EDX). Materials and Methods: sixty freshly extracted human single rooted lower premolars with single canal were instrumented with Revo-S files till size AS 35. The samples were divided into 5 experimental groups according to the final rinse used and control group (10 samples each); Group I: irrigated with 0.2% chitosan acetate, Group II: irrigated with 0.2% chitosan citrate, Group III: irrigated with 1% acetic acid, Group IV: irrigated with 1% citric …
The Effect Of Application Of Forsterite Nanoparticles In Different Protocols On Permeability Of Superficial And Deep Dentin, Sarah Mohamed Ali, Maha Niazy, Randa Hafez, Maha Elkorashy
The Effect Of Application Of Forsterite Nanoparticles In Different Protocols On Permeability Of Superficial And Deep Dentin, Sarah Mohamed Ali, Maha Niazy, Randa Hafez, Maha Elkorashy
Al-Azhar Journal of Dentistry
Abstract:Purpose: This study evaluated and compared the effect of application of Forsterite nanoparticles in different protocols on permeability of superficial and deep dentin at different time intervals. Materials and methods: thirty human molars were used to prepare 60 dentin discs, divided into three main groups (n=20) (P); (P1): Forsterite nanoparticles alone, (P2): Forsterite nanoparticles added to an adhesive system and (P3): Forsterite nanoparticles incorporated in Glass Ionomer. main groups were subdivided into two subgroups (n=10) according to the dentin depth (D); (D1): superficial dentin and (D2): deep dentin. Permeability was measured at three time intervals (T); (T1) baseline, (T2) after …
Evaluation Of Marginal Accuracy And Color Stability Of Lithium Disilicate Laminate Veneer Compared To Hybrid Ceramic Veneer, Eman El-Malah, Sahar Abd El-Aziz, Suad Hassan
Evaluation Of Marginal Accuracy And Color Stability Of Lithium Disilicate Laminate Veneer Compared To Hybrid Ceramic Veneer, Eman El-Malah, Sahar Abd El-Aziz, Suad Hassan
Al-Azhar Journal of Dentistry
Purpose: The purpose of the current study was to evaluate marginal accuracy and color stability of lithium disilicate laminate veneer compared to hybrid ceramic veneer. Materials and Methods: Forty maxillary teeth were collected and prepared (but joint preparation) to receive a laminate veneer. They were equally sub grouped (n= 20) to receive 2 types of laminate veneers (IPS E-max CAD and vita enamic). The veneer was milled from the blocks in a CEREC 3 Machine. All veneers were cemented with resin cement. All samples had been subjected to 20000 thermal cycles which are equivalent twenty years of clinical use. Marginal …
Preparation And Characterization Of Tio2-Sio2 Bioceramic Coating On Ti Alloy Via Electrochemical Anodization And Its Effect On Corrosion Resistance, Rasha Marzouk, Eatemad Shoreibah, Inas Motawae, Madiha Shoeib
Preparation And Characterization Of Tio2-Sio2 Bioceramic Coating On Ti Alloy Via Electrochemical Anodization And Its Effect On Corrosion Resistance, Rasha Marzouk, Eatemad Shoreibah, Inas Motawae, Madiha Shoeib
Al-Azhar Journal of Dentistry
AbstractPurpose: The present study was carried out to study changing the anodization parameters and investigate the corrosion resistance of the ceramic coating that will be formed on the CP-Ti by anodization method. Materials and Methods: CP-Ti (10mm×10mm×2mm) were used for fabrication of bioceramic coating through anodization with different parameters using potassium silicate electrolyte. Samples were characterized using XRD, AT-FTIR. Surface roughness was measured using ESEM and surface topography was evaluated by SEM. Tafel polarization and electrochemical impedance spectroscopy were used to detect the change in the corrosion resistance after anodization. Results: XRD revealed that the anodized coated samples showed well …
The Efficacy Of Adhesion Of C-Point Obturation System In Retreated Root Canal Walls., Sarah Mohamed, Mervat Fawzy, Hagar Abdelnaby
The Efficacy Of Adhesion Of C-Point Obturation System In Retreated Root Canal Walls., Sarah Mohamed, Mervat Fawzy, Hagar Abdelnaby
Al-Azhar Journal of Dentistry
Purpose: This study was designed to assess the efficacy of adhesion of C-point obturation system to retreated root canal walls. Materials and Methods: Eighty extracted upper incisors were prepared using Universal ProTaper rotary files then distributed into 2 main groups. Group I: primary treated, Group II: retreated. Each group was further distributed into 4 subgroups depending on the type of the filling material. Subgroup A: were obturated with gutta-percha. Subgroup B: were obturated with gutta-percha and AH Plus sealer. Subgroup C: were obturated with C-point. Subgroup D: were obturated with C-point and BC sealer. The push out test was carried …
Effect Of Different Chelating Agents On Bond Strength Of C-Point Obturating System To Radicular Dentin, Sara E. Abdelaziz, Mervat I. Fawzy, Hagar A. Bastawy
Effect Of Different Chelating Agents On Bond Strength Of C-Point Obturating System To Radicular Dentin, Sara E. Abdelaziz, Mervat I. Fawzy, Hagar A. Bastawy
Al-Azhar Journal of Dentistry
This study was designed to assess the effect of 17% ethylenediaminetetraacetic acid (17%EDTA) and 0.2% Chitosan as chelating agents on bond strength of CPoint obturation system to root canal dentin. Materials and Methods: Fifty extracted lower premolars were selected and prepared using Universal ProTaper rotary files then the samples were equally distributed into 2 main groups depending on the type of the final rinse. Group I:17 % EDTA, Group II: 0.2% chitosan, Control group: distilled water. Each main group was further equally distributed into 2 subgroups depending on the type of the filling material. Subgroup A: samples were obturated with …
Effect Of Different Wall Thicknesses On Fracture Strength, Marginal Accuracy And Translucency Of Monolithic Ceramic Restorations, Marwa M. Abd El Aziz, Mona H. Mandour, Rania A. Shetawey
Effect Of Different Wall Thicknesses On Fracture Strength, Marginal Accuracy And Translucency Of Monolithic Ceramic Restorations, Marwa M. Abd El Aziz, Mona H. Mandour, Rania A. Shetawey
Al-Azhar Journal of Dentistry
The present study was conducted to evaluate the effect of different crown wall thicknesses (0.5mm, 1mm and 1.5mm) on the fracture load, marginal accuracy, and translucency of monolithic CAD-CAM manufactured lithium disilicate and Zirconia crowns. Materials and Methods: 60 monolithic single were constructed using CAD/CAM machine divided into two groups according to the material of construction Group (E): Monolithic IPS e.max CAD lithium disilicate crowns and Group (B): Monolithic BruxZir Solid zirconia based crowns. Each group was divided into three subgroups according to the axial wall thickness of the crown into Subgroup (0.5): 0.5 mm margin thickness, Subgroup (1): 1mm …
Evaluation Of Shear Bond Strength Of Self-Adhering Flowable Composite To Mineral Trioxide Aggregate And Biodentine, Asmaa O. Abdel-Rhman, Mohsen N. El-Din, Mahmoud H. Mohamed
Evaluation Of Shear Bond Strength Of Self-Adhering Flowable Composite To Mineral Trioxide Aggregate And Biodentine, Asmaa O. Abdel-Rhman, Mohsen N. El-Din, Mahmoud H. Mohamed
Al-Azhar Journal of Dentistry
This study aimed to evaluate shear bond strength of mineral trioxide aggregate and biodentine to self-adhering flowable composite. Materials and Methods: eighty Double Split Teflon mold has been prepared with a central hole measuring (3mm in diameter and 2 mm in height) for the mold used for tested materials and (2mm in diameter and in height) for the other mold used for restorative material. The molds were filled with MTA and Biodentine. The mixing material MTA and biodentine applied to its mold (n = 40) and allocated into 2 groups. The specimens will store for72 hours at 37˚C and 100% …
Impact Of Different Movement Kinematics On The Deformation Of Tf Adaptive Files, Sabah M Sobhy, Mervat I. Fawzy, Hagar A. Bastawy
Impact Of Different Movement Kinematics On The Deformation Of Tf Adaptive Files, Sabah M Sobhy, Mervat I. Fawzy, Hagar A. Bastawy
Al-Azhar Journal of Dentistry
This study was designed to evaluate the effect of different movement kinematics on the deformation of TF Adaptive files using Dental Operating Microscope (DOM) and Scanning Electron Microscope (SEM). Materials and Methods: One hundred and eighty extracted human mandibular molars were selected with curved mesiobuccal canal (15º-35º). Thirty new sets of TF Adaptive files were divided into 3 groups according to the movement kinematics used (10 instruments each). Group I: 60 samples were instrumented with 10 TF Adaptive files in adaptive motion with TF Adaptive program Elements motor. Group II: 60 samples were instrumented with 10 TF Adaptive files in …
Marginal Adaptation Of Lithium Disilicate Endocrowns With Different Cavity Depths And Margin Designs, Kholoud M Soliman, Mona H Mandor, Walaa El Mekkawi
Marginal Adaptation Of Lithium Disilicate Endocrowns With Different Cavity Depths And Margin Designs, Kholoud M Soliman, Mona H Mandor, Walaa El Mekkawi
Al-Azhar Journal of Dentistry
to study effect of different preparation designs on the marginal adaptation of lithium disilicate endocrowns. Materials and methods: Twenty human mandibular molars were selected to conduct the present study. All teeth were randomly divided into 2 groups (n=10 each) according to the preparation design of endocrown with two coronal cavity depths: Group (2D): Endodontically treated teeth with 2mm depth intra-coronal cavity preparation .Group (4D): Endodontically treated teeth with 4mm depth intra-coronal cavity preparation. Samples of each group were further subdivided into 2 subgroups (n=5 each) according to the preparation’s margin configuration: Subgroup (B): preparations with butt-joint margin configuration. Subgroup (S): …
Marginal And Internal Fit Of Monolithic And Veneered Zirconia Crowns, Mai I. Mohammed, Mona H Mandour, Rania A. Shetawey
Marginal And Internal Fit Of Monolithic And Veneered Zirconia Crowns, Mai I. Mohammed, Mona H Mandour, Rania A. Shetawey
Al-Azhar Journal of Dentistry
The present study was conducted to evaluate the effect of veneeringzirconia frameworks on the marginal and internal fit of zirconia based restorations.Materials and methods: Forty natural premolars were prepared to receive all-ceramiccrowns. The forty premolars were divided into two groups according to the type of restoration.Group (I) consisted of ten samples restored using monolithic zirconia crowns.Group (II) consisted of thirty samples restored using veneered zirconia frameworks.Group II was subdivided into three equal subgroups according to veneering technique.Subgroup (IIA) veneered using manual layering technique, Subgroup (IIB) veneeredusing Press-on technique and Subgroup (IIC) veneered using CAD-on technique. Allthe finished crowns were cemented …
The Effect Of Occlusion And Two Denture Base Material On Muscle Activity And Masticatory Efficiency Of Complete Dentures, Marwa Ezz El-Din, Mohammed Essam El-Din Sanad, Hala M. Gamal El-Din
The Effect Of Occlusion And Two Denture Base Material On Muscle Activity And Masticatory Efficiency Of Complete Dentures, Marwa Ezz El-Din, Mohammed Essam El-Din Sanad, Hala M. Gamal El-Din
Al-Azhar Journal of Dentistry
The aim of this study was to evaluate the effect of occlusion and two different denture base material on muscle activity and masticatory efficiency of complete dentures. Material and Methods: Two complete dentures of different material, conventional and flexible denture base material with different occlusal schemes, starting with unbalanced occlusion and converted into bilateral balanced occlusion through three different ways of remounting, laboratory, clinical and intra-oral selective grinding applied on three different posterior teeth assemblies were delivered to patients who were totally edentulous (all were men range age 50-60 years). Muscle activity and masticatory efficiency were evaluated with two different …
Evaluation Of Different Attachment Systems On Single Implant Retained Mandibular Overdenture, Sara Medhat, Nesrin A El Mahrouky, Hala M Gamal El-Din, Nahed A Abd El Moniem
Evaluation Of Different Attachment Systems On Single Implant Retained Mandibular Overdenture, Sara Medhat, Nesrin A El Mahrouky, Hala M Gamal El-Din, Nahed A Abd El Moniem
Al-Azhar Journal of Dentistry
This study was conducted to evaluate bone height around ball and socketand equator attachment in mandibular overdenture retained by single implant. Materialand methods: Ten completely edentulous patients were selected with ages rangingfrom 50-60 years. Single implant was inserted for each patient and they all receivedheat cured acrylic dentures. The ten patients were divided into two groups, group(I) have received ball &socket attachment, group (II) received equator attachment.In the fitting surface of the lower denture two holes where made between 6 and 7acrylic teeth and were filled with radioopaque material (amalgam) . These representedposterior marker areas of evaluation the bone height. …
Effectiveness Of Chitosan As Final Irrigating Solution On Bond Strength Of Resin Based Sealer To Radicular Dentin, Sarah S. Hashem, Mervat I. Fawzy, Hagar A. Bastawy
Effectiveness Of Chitosan As Final Irrigating Solution On Bond Strength Of Resin Based Sealer To Radicular Dentin, Sarah S. Hashem, Mervat I. Fawzy, Hagar A. Bastawy
Al-Azhar Journal of Dentistry
This study was designed to assess the impact of Chitosan-acetate as final root canal irrigant on bond strength of resin-based sealer to radicular dentin.Materials and Methods: Forty extracted human lower premolars with single roots and canals were prepared with ProTaper Universal rotary files till size F4. The samples were dispensed into 3 experimental groups according to the final rinse used and control group (10 samples each); Group I: irrigated with 0.2% chitosan acetate, Group II:17% EDTA, Group III: distilled water and control group (IV): saline. The samples were obturated by cold lateral compaction technique using AH plus sealer. Samples were …
Micro- Computed Tomographic Evaluation Of Marginal Fit Of Different Monolithic All Ceramic Crowns Fabricated Using Two Cad/Cam Systems., Asmaa Abdel Gawad, Mohamed El-Yassaky, Atef Fathi, Mona Hossam El Din
Micro- Computed Tomographic Evaluation Of Marginal Fit Of Different Monolithic All Ceramic Crowns Fabricated Using Two Cad/Cam Systems., Asmaa Abdel Gawad, Mohamed El-Yassaky, Atef Fathi, Mona Hossam El Din
Al-Azhar Journal of Dentistry
the objective of the present in vitro study was to evaluate the effect of two different CAD/CAM systems on the marginal fit of three commercially available dental ceramics using micro-computed tomography. Materials and Methods: one human natural premolar was selected, received a standardized all ceramic preparation and duplicated using two types of die materials. PMMA dies were used for construction of E.max CAD and Vita Enamic monolithic crowns while zirconia dies were used for zirconia crowns. A total of thirty monolithic all-ceramic crowns (N=30) were constructed on the fabricated working dies. These were equally divided into 2 groups (n=15) according …
The Remineralizing Effect Of Incorporating Ca-Phosphate And Ca-Fluoride Nanoparticles Into The Self-Etch Adhesives Used In Restoring Class I Cavities, Mona Essam, Maha A. Niazy, Hadeel Farouk, Amani A. Mostafa
The Remineralizing Effect Of Incorporating Ca-Phosphate And Ca-Fluoride Nanoparticles Into The Self-Etch Adhesives Used In Restoring Class I Cavities, Mona Essam, Maha A. Niazy, Hadeel Farouk, Amani A. Mostafa
Al-Azhar Journal of Dentistry
This study was carried out to investigate the remineralizing effect of amorphous calcium phosphate (ACP) and calcium fluoride (CaF2) nanoparticles incorporated in two-step self etch- adhesives (in vivo). Materials and Methods: The nanoparticles were incorporated into the bond of ClearfilTM SE Bond at a mass fraction of 10%. A total of ten patients in the age range of 17-30 years old, having at least 3 carious lower molars, were enrolled in this study (split mouth design). Class I cavity preparation was performed, leaving the caries affected dentine at the pulpal floor. The 30 molars were divided into 3 groups (n=10) …
Effect Of Silanized Silicon Dioxide And Titanium Dioxide Nanoparticles Loading On The Compressive Strength Of Prepared Composite Core Material, Mai M. Elbatanony, Sayed H. Saniour, Maha A. Niazy, Inas T. Motawae, Magdy W. Sabaa, Dalia Y. Zaki, Haidy N. Salem
Effect Of Silanized Silicon Dioxide And Titanium Dioxide Nanoparticles Loading On The Compressive Strength Of Prepared Composite Core Material, Mai M. Elbatanony, Sayed H. Saniour, Maha A. Niazy, Inas T. Motawae, Magdy W. Sabaa, Dalia Y. Zaki, Haidy N. Salem
Al-Azhar Journal of Dentistry
the aim of this study was to assess the effect of silanized silicon dioxide and titanium dioxide nanoparticles loading on the compressive strength of experimentally prepared resin composite core material. Materials andMethods: Resin matrix was prepared by adding 70 wt% Bis-GMA,30 wt% TEGDMA, 0.5 wt% CQ and 0.5 wt% EDAB. Sintering of the silica nanoparticles was performed and then the silanized sintered silica fillers together with titanium dioxide nanoparticles and silica nanoparticles were mixed with the prepared resin matrix. Specimens of the experimental and control resin composite were prepared in split Teflon moulds (4x6mm) for compressive strength testing using universal …
Fracture Resistance Of Endodontically Treated Maxillary Second Premolars Restored With Corono-Radicular Stabilization Method (In Vitro Study), Mariem M. Abu Elyazid, Mohsen M. Nour El Deen, Mohamed A. El Yasaky
Fracture Resistance Of Endodontically Treated Maxillary Second Premolars Restored With Corono-Radicular Stabilization Method (In Vitro Study), Mariem M. Abu Elyazid, Mohsen M. Nour El Deen, Mohamed A. El Yasaky
Al-Azhar Journal of Dentistry
This study aims to investigate the fracture resistance of endodontically treated maxillary second premolars using fracture resistance test. Materials and Methods: Fifty-five maxillary second premolars were selected. The teeth were divided into four groups (three experimental groups and one control group) each group consists of fifteen teeth. The control group consists of ten teeth. The experimental groups were divided according to the mechanical system used: Endo Star, Revo S, and Protaper. Each group was subdivided into two subgroups according to the presence of the crown or not. Endo star E5 group: (1.a) and (2.a), Revos group :(1.b) and (2.b), Protaper …
The Efficacy Of Reciprocating Instruments Versus Continuous Rotary Nickel-Titanium Instruments In Root Canal Retreatment With Different Filling Materials, Sara M. Galal, Wael H. Kamel, Mohsen M. Nour El-Deen
The Efficacy Of Reciprocating Instruments Versus Continuous Rotary Nickel-Titanium Instruments In Root Canal Retreatment With Different Filling Materials, Sara M. Galal, Wael H. Kamel, Mohsen M. Nour El-Deen
Al-Azhar Journal of Dentistry
The aim of this study was directed to rate the quality of differentEngine-driven retreatment files: ProTaper Retreatment files, Wave One system and OneShape system in removal of different filling materials. Material and methods: Nighty-six freshly extracted mandibular first molars were prepared with universal ProTaper rotary files till size F3 then categorized into two main groups (I and II) on the basis of type of material used in obturation. Group I: obturated with Gutta-percha, Group II: obturated with EndoREZ. Each One of them was categorized into three subgroups : sub group A, B and C on the basis of the system …
Splinting Of Mini Implants Used To Assist Complete Mandibular Overdentures With Two Different Bar Designs: A 3-Year Clinical And Radiographic Study, Radwa M.K. Emera, Heba Nabil
Splinting Of Mini Implants Used To Assist Complete Mandibular Overdentures With Two Different Bar Designs: A 3-Year Clinical And Radiographic Study, Radwa M.K. Emera, Heba Nabil
Al-Azhar Journal of Dentistry
Purpose : Clinical and radiographic evaluation of early loaded four splinted mini dental implants (MDIs) with two different bar designs for assisting mandibular complete overdenture. Materials and Methods: Twenty completely edentulous patients (10 males and 10 females) with mean age of 52.5 years old were selected for this study.All patients received four mini implants in the mandibular interforaminal area. Patients were assigned into two equal groups according to splinting bar design, where it was milled bar for Group I and round bar joint for Group II. Maxillary complete denture was constructed for each patient against implant assisted mandibular overdenture. Periimplant …
Evaluation Of Retention Of A Recently Suggested Flexible Denture Base Material, Noha T. Alloush, Mohamed E. Sanad, Shereen M. Kabeel
Evaluation Of Retention Of A Recently Suggested Flexible Denture Base Material, Noha T. Alloush, Mohamed E. Sanad, Shereen M. Kabeel
Al-Azhar Journal of Dentistry
Purpose was to evaluate the retention of thermo-elastic acrylic resin versus conventional heat cured acrylic resin. Material and Methods: Ten completely edentulous patients were divided into two groups, patients in this first group received one maxillary and mandibular complete denture made of conventional heat cured acrylic resin, and wearing it for one month, and then the mandibular denture was replaced by another one whose denture base was made of thermoelastic acrylic resin. Patients were instructed to wear the dentures for one month before evaluation of retention. While in the second group, the other patients received one maxillary conventional heat cured …
Comparison Between Two Different Impression Techniques In Ball And Socket Attachments Supported Complete Implant Overdentures On Electromyographic Activity, Marwa Seif El Nasr, Mostafa M. Abd El Ghany, Dina M. Kholief
Comparison Between Two Different Impression Techniques In Ball And Socket Attachments Supported Complete Implant Overdentures On Electromyographic Activity, Marwa Seif El Nasr, Mostafa M. Abd El Ghany, Dina M. Kholief
Al-Azhar Journal of Dentistry
Purpose: The purpose of this study was to compare between two different impression techniques in ball and socket attachments supported complete implant overdentures on electromyographic activity. Material and Methods: Ten fully edentulous patients were chosen from the patient clinic of removable prosthodontics department, Patients were divided into 2 groups according to the type of impression technique Group 1: The patients received the denture with the open impression tray technique then a washing period of two weeks elapsed and then switched to the other denture with closed impression tray technique. Group 2: The patients received the denture with the closed impression …