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Restorative Dentistry Issue (Removable Prosthodontics, Fixed Prosthodontics, Endodontics, Dental Biomaterials, Operative Dentistry)
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Evaluation Of The Clinical Performance Of Reinforced Glass Ionomer Restorations And Influence Of Heat Application On Their Shear Bond Strength And Microleakage, Nessma Mahmoud, Maha Niazy, Mohamed Elyasaky
Evaluation Of The Clinical Performance Of Reinforced Glass Ionomer Restorations And Influence Of Heat Application On Their Shear Bond Strength And Microleakage, Nessma Mahmoud, Maha Niazy, Mohamed Elyasaky
Al-Azhar Journal of Dentistry
Purpose: This study evaluated and compared between effect of heat application on the shear bond strength and microleakage of class I reinforced glass ionomer restorations (EquiaFil Fort, Zirconomer and Resin modified glass ionomer Fuji II LC). Meanwhile, the clinical performance of such materials was assessed. Materials and Methods: Ninety caries free first and second permanent molars were divided into three groups of (30 each) according to the type of the Glass Ionomer Cements used. Each group was further subdivided into three subgroups of (10 each): B1 for no heat application, B2 for 20 sec heat application and B3 for 60 …
The Influence Of Placement Technique And Composite Type On The Proximal Contact In Class Ii Resin Restorations, Radwa Dabbagh, Mohammed Elyasaky, Doaa Elsharkawy
The Influence Of Placement Technique And Composite Type On The Proximal Contact In Class Ii Resin Restorations, Radwa Dabbagh, Mohammed Elyasaky, Doaa Elsharkawy
Al-Azhar Journal of Dentistry
Purpose: To evaluate the influence of the placement technique and type of composite resin on the restoration of proximal contact in class II resin composite restorations in comparison to amalgam restoration. Materials and methods: 100 standardized mesiooclusual (MO) cavities were prepared in 100 artificial mandibular first molars used in the study grouped into four groups according to type of restorations; (co): amalgam restorations (10 specimens),( C1): flowable composite (nanohybrid Z350) (30 specimens),( C2): conventional / regular composite (nanohybrid Z250) (30 specimens), (C3): packable composite (microhybrid P60) (30 specimens).The composite restoration groups were further divided into three groups 10 specimens each …
The Effect Of Ph Cycling On Surface Microhardness And Fluoride Release Of Two Modified Nanoclay Glass Ionomer Restorations In Class V Cavities, Monaliza Abdelaziz, Maha Niazy, Hebaallah Taher
The Effect Of Ph Cycling On Surface Microhardness And Fluoride Release Of Two Modified Nanoclay Glass Ionomer Restorations In Class V Cavities, Monaliza Abdelaziz, Maha Niazy, Hebaallah Taher
Al-Azhar Journal of Dentistry
Purpose: To assess the effect of pH cycling on surface microhardness and fluoride release of two modified nanoclay glass ionomer restorations (in vitro). Materials and Methods: A total of 180 permanent human caries free premolars were used. Class V were prepared on facial surfaces of the teeth. They were classified according to type of glass ionomer used for restoration of the cavities into three groups (60 teeth each); conventional glass ionomer medifill (A1), Dellite 43 modified glass ionomer (A2), and Dellite LVF modified glass ionomer (A3). Each group was moreover subdivided into three subgroups (20 teeth each) relative to the …
Effect Of Xp-Endo Finisher On Microbial Root Canal Flora After Using Single-File Or Multiple-File Rotary Systems, Hebatallah Fath-Allah, Wael Kamel, Mohsen Nour El Din
Effect Of Xp-Endo Finisher On Microbial Root Canal Flora After Using Single-File Or Multiple-File Rotary Systems, Hebatallah Fath-Allah, Wael Kamel, Mohsen Nour El Din
Al-Azhar Journal of Dentistry
Purpose: This In vivo study was directed to compare and evaluate the bacterial count before and after preparing the root canals with the following variables: Single and multiple file rotary systems and Finishing after preparation with and without Xp-endo finisher. Methods: A total of 40 patient requiring endodontic treatment of both sexes were enrolled for this study from the dental hospital of Nahda University in BaniSuef. Patients were fully informed about the study`s procedures, benefits and risks. They signed an informed consent. Patients were divided into two groups according to the rotary system used ProTaper universal and one shape (n=20) …
Effect Of Bleaching On The Staining Susceptibility Of Enamel And Composite Resin (An In Vitro Study), Neama Ziada, Mohamed Al Yasaky, Doaa Elsharkawy
Effect Of Bleaching On The Staining Susceptibility Of Enamel And Composite Resin (An In Vitro Study), Neama Ziada, Mohamed Al Yasaky, Doaa Elsharkawy
Al-Azhar Journal of Dentistry
Purpose: This study was aimed to asses the bleaching agent effect on the staining ability of enamel and composite resin. Methods: The overall number of samples was sixty; thirty enamel and thirty resin composite discs with thickness of 2 mm and lo mm were preformed from resin composite material (filtek Z25o), Each group of 30 specimens (enamel and composite) was divided into 2 groups according to the bleaching procedures, where the first group consisted of l0 specimens (n=l0) and was given symbol (Bl) which received no bleaching agent control group (stored in artificial saliva). The second group was given symbol …
Solubility And Sealing Ability Of Recently Introduced Biocearmic Root-End Filling Materials, Amira Moustafa, Inas Motawea, Rania Bayoumi
Solubility And Sealing Ability Of Recently Introduced Biocearmic Root-End Filling Materials, Amira Moustafa, Inas Motawea, Rania Bayoumi
Al-Azhar Journal of Dentistry
Purpose: the current study was conducted for evaluation of solubility and sealing ability of two recently introduced biocearmic root end filling materials (Bio MTA and Total Fill) in comparison to the gold standard Mineral Trioxide Aggregate (MTA).Materials and Methods: Regarding solubility test a total of 15 disc specimens were fabricated from the three tested materials. The discs were then divided randomly into three equal groups (n=5) according to tested root end filling materials (Pro root MTA, Bio MTA, and Total Fill biocearmic). The solubility test was done according to ISO no 6786. The amount of residue weight from each specimen …
Effect Of Actilux - Activated Whitening Toothpaste And Marine Salts On Color Change And Microhardness Of Bovine Enamel, Mayada Sultan, Maha Niazy
Effect Of Actilux - Activated Whitening Toothpaste And Marine Salts On Color Change And Microhardness Of Bovine Enamel, Mayada Sultan, Maha Niazy
Al-Azhar Journal of Dentistry
Purpose: To evaluate the effect of Actilux-activated whitening toothpaste and Marine salts powder on color change and microhardness of bovine enamel. Methods: Thirty intact bovine incisors were used in this study to produce enamel specimens. The specimens were randomly distributed into three groups (n= 10) according to the tested whitening agents as follows: Group I: BW; BlanX LED White Shock (Actilux-activated), Group II: MS; Marine salts whitening powder and Group III: CR; Crest regular fluoridated toothpaste. The specimens were stained using black tea solution for 5 days. Each specimen was brushed twice daily for 8 then 15 days. The color …
Effect Of Different Resin Thickness On Some Physical Properties Of Sonic Fill Versus Bulk Fill Resin Composite, Omnia Nour, Maha Niazy, Sameh Nabih
Effect Of Different Resin Thickness On Some Physical Properties Of Sonic Fill Versus Bulk Fill Resin Composite, Omnia Nour, Maha Niazy, Sameh Nabih
Al-Azhar Journal of Dentistry
Purpose: This study evaluated the effect of resin thickness from both {Sonic Fill resin composite (SF)& Tetric N Ceram Bulk Fill resin composite (TNB)} on polymerization shrinkage strains, depth of cure and degree of conversion. Material and Methods: A total of 70 specimens were prepared and Polymerization shrinkage strains were measured by strain gauge foil connected to the computer software program which gave the results. Depth of cure (DOC) was measured by Vickers microhardness tester applying a 50g load through a Vickers indenter with a dwell time of 10s and expressed as mean of hardness ratio. Degree of conversion (DC%) …
Efficacy Of Different Surface Treatments On The Bond Strength Of Resin Cement To Zirconia Ceramic, Eman Elkallaf, Atef Ahmed, Eman Essam, Suad Hasan
Efficacy Of Different Surface Treatments On The Bond Strength Of Resin Cement To Zirconia Ceramic, Eman Elkallaf, Atef Ahmed, Eman Essam, Suad Hasan
Al-Azhar Journal of Dentistry
Purpose: The plan for this study was to anatomise the effect of alternative surface treatments to enhance bonding to zirconia. Materials and Methods: forty discs of zirconia (Prettau,zircon zhan, Italy) were prepared using Isomet 4000 precision Saw then discs were divided into 5 groups. Group 1, control; Group2, zirconia discs were treated with50-mm Al2O3 particles; Group 3, zirconia discs were received hand grinding; Group 4, zirconia discs were treated by a CO2 laser and Group 5, zirconia discs were treated using ERYAG laser. Composite resin discs were constructed and cemented to zirconia samples with panavia cement. For the bond strength …
Effect Of Abrasive Containing Whitening Dentifrices On Surface Characteristics And Color Stability Of Two Aesthetic Restorative Materials, Asmaa Ramadan, Mohamed Ali, Rania Bayoumi
Effect Of Abrasive Containing Whitening Dentifrices On Surface Characteristics And Color Stability Of Two Aesthetic Restorative Materials, Asmaa Ramadan, Mohamed Ali, Rania Bayoumi
Al-Azhar Journal of Dentistry
surface characteristics and color Stability of two aesthetic restorative materials. Materials and Methods: A total of 180 specimen were prepared from two tested materials (Filtek Z350 resin composite and Equia forte glass ionomer with nano filled coat).The specimen were divided into three groups (n=60). Group 1: hydrated silica containing tooth paste Group 2: calcium carbonate containing tooth paste, Group 3: trisodium phosphate containing tooth paste, each group was subdivided into two subgroups according to number of brushing duration (1120, 2240) cycles (n=15).Each subgroup was further subdivided into three divisions according to the type of test performed (micro hardness, surface roughness, …
Antibacterial Effect Of Ginger, Green Tea And Pomegranate Versus Chlorhexidine Using Stevia And Sucrose Sugar, Hagar Abdel Tawab, Maha Niazy, Doaa El Elsharkawy
Antibacterial Effect Of Ginger, Green Tea And Pomegranate Versus Chlorhexidine Using Stevia And Sucrose Sugar, Hagar Abdel Tawab, Maha Niazy, Doaa El Elsharkawy
Al-Azhar Journal of Dentistry
Purpose: To evaluate the antibacterial activity of three natural plant extracts (Ginger, Green tea and Pomegranate peel) versus Chlorhexidine using Sucrose and Stevia Sugar. Materials and Methods: extracts of the three natural materials were prepared where an aqueous extract of green tea was prepared by boiling, and pomegranate peel and ginger were extracted using ethyl alcohol. Carious dentin samples were obtained from carious permanent molars. Streptococcus mutans were isolated and identified. The extracts were compared to chlorohexidine using either no sugar, sucrose or stevia sugar. Antibacterial activity was assessed through the inhibition zone, bacterial count and metabolic activity. Ginger, pomegranate …
Effect Of Different Anticollagenolytic Agents On Dentin Erosion Before And After Casein Phospho Peptides-Amorphous Calcium Fluoride Phosphate Application, Nourhan Moustafa, Maha Niazy, Essam Naguib, Rasha Afifi
Effect Of Different Anticollagenolytic Agents On Dentin Erosion Before And After Casein Phospho Peptides-Amorphous Calcium Fluoride Phosphate Application, Nourhan Moustafa, Maha Niazy, Essam Naguib, Rasha Afifi
Al-Azhar Journal of Dentistry
Purpose: This study aimed to compare the effect of two anticollagenolytic agents, chlorohexidine and Aloe vera on dentin microhardness and their effect as pretreatments on the remineralization potential of CPP-ACFP. Materials and Methods: For this study, 40 extracted sound human premolars were subjected to artificial erosion and randomly divided to two equal groups (20 premolars each) according to immersion in the tested anticollagenolytic agents (A); group (A1) Aloe vera and group (A2) Chlorhexidine. Each group was further subdivided into two equal subgroups (10 premolars each) according to microhardness measurement (B); group (B1): before CPP-ACFP application and group (B2): after CPP-ACFP …
Impact Of Ball And Magnetic Attachments And Inter-Implant Distance On Retention Of Mandibular Overdenture (An In Vitro Study), Neveen Abd El Rahim
Impact Of Ball And Magnetic Attachments And Inter-Implant Distance On Retention Of Mandibular Overdenture (An In Vitro Study), Neveen Abd El Rahim
Al-Azhar Journal of Dentistry
Purpose: To evaluate the influence of the attachment type and inter-implant distance on the retention of 2-implant retained mandibular overdenture during 12 months of simulated function. Material and Methods: Three transparent acrylic resin casts simulating a completely edentulous mandible were fabricated. The retentive forces (N) of two implant-retained mandibular overdentures were estimated by a universal testing machine. Six groups were computed on three casts; two ball attachments with inter-implant distances (IIDs) 23mm were placed in the canine, 31mm were placed in the premolar and 40mm were placed in the first molar regions respectively and two magnetic attachments were placed on …
Effect Of Repeated Firings On The Color Change And Surface Roughness Of Two All-Ceramic Systems, Sherehan Mohamed, Atef Ahmed, Walaa Mekkawi
Effect Of Repeated Firings On The Color Change And Surface Roughness Of Two All-Ceramic Systems, Sherehan Mohamed, Atef Ahmed, Walaa Mekkawi
Al-Azhar Journal of Dentistry
Purpose: This study aimed to evaluate the effect of repeated firings on the color change and surface roughness of two all-ceramic systems. Materials and Methods: Forty disc shaped ceramic specimens ( 10 mm x 1 mm ) were fabricated from two commercially available all-ceramic system (IPS E.max press, Ivoclar-Vivadent, Schaan, Liechtenstien, Germany and zirconia Nacera Pearl, DOCERAM Medical Ceramics, Germany) (N=20). Color measurement of the specimens was made using Reflective spectrophotometer and surface roughness (Ra) was measured using USB digital profile guage, (Elcometer 224/2, Elcometer Instruments, Great Britain) after 1, 3, 5 and 7 repeated firing. Results: The mean color …
Evaluation Of Shear Bond Strength Of Glass Ionomer Modified With Natural Biological Products:An In Vitro Study, Bassma Abdelhafeez, Maha Niazy, Essam Naguib, Sara Younis
Evaluation Of Shear Bond Strength Of Glass Ionomer Modified With Natural Biological Products:An In Vitro Study, Bassma Abdelhafeez, Maha Niazy, Essam Naguib, Sara Younis
Al-Azhar Journal of Dentistry
Purpose: The aim of this study was to examine the shear bond strength (SBS) of conventional glass ionomer incorporated (GI) with flax fibers and/or ethanolic extract of propolis (EEP) with and without thermo-cycling. Materials and Methods: We used 40 extracted sound molars were used in the present study and divided into four equal groups: Group (GI) conventional glass ionomer(control), Group(F)GI incorporated with 5% flax fibers, Group (P) GI incorporated with 1% ethanolic extract of propolis (EEP), Group (FP) GI incorporated with 5% flax fibers and 1% ethanolic extract of propolis (EEP). All samples were prepared for shear bond strength assessment …
Antibacterial Effect Of Bioactive Composite Versus Glass Ionomer Using Different Storage Media, Walaa Hassan, Maha Niazy, Mayada Sultan
Antibacterial Effect Of Bioactive Composite Versus Glass Ionomer Using Different Storage Media, Walaa Hassan, Maha Niazy, Mayada Sultan
Al-Azhar Journal of Dentistry
Purpose: To evaluate the antibacterial effect of Bioactive composite versus Glass ionomer using different storage media. Materials and Methods: Three restorative materials were used in this study (Reliafil Lc, Amalgomer and Conventional Glass Ionomer). 90 Disk- shaped specimens (2.5 mm height and 8 mm diameter) were prepared from each material. Groups were divided into three subgroups according to storage media (Acids, artificial saliva and de-ionized water). Bacterial strains were polished at 370c for 24h in Brain Heart Infusion broth which attained from stock cultures. Disk diffusion agar method was used for antimicrobial liability. The inhibition zone diameter around the specimen …
Effect Of Different Denture Base Materials On The Masticatory Muscle Performance In Patients Wearing Single Maxillary Complete Denture: A Cross-Over Study, Doaa Rostom, Ahmed Fayyad, Aliaa Tawfeek
Effect Of Different Denture Base Materials On The Masticatory Muscle Performance In Patients Wearing Single Maxillary Complete Denture: A Cross-Over Study, Doaa Rostom, Ahmed Fayyad, Aliaa Tawfeek
Al-Azhar Journal of Dentistry
Purpose: The aim of the research was to evaluate the masticatory muscle performance with different resilient denture base materials in maxillary single denture. Material and methods: Six patients were included in this cross over study. In the first stage of the study, the patients were instructed to use the denture (PMMA denture base) for 1 month and the masticatory muscle activity was assessed in the second and fourth weeks after delivery. A wash out period of two weeks was applied in this study to eliminate the effect of the previous denture then the denture material was relined to soft liner, …
Effect Of Blood Contamination On Marginal Adaptation Of Mta And Endosequence Root Repair Material As A Retrograde Filling, Marwa Saker, Mohammed Khalefa, Hemat El-Sheikh
Effect Of Blood Contamination On Marginal Adaptation Of Mta And Endosequence Root Repair Material As A Retrograde Filling, Marwa Saker, Mohammed Khalefa, Hemat El-Sheikh
Al-Azhar Journal of Dentistry
Purpose: This study was designed to compare marginal adaptation of MTA and Endosequence Root Repair Material (ERRM) as retrograde filling materials. Materials and methods: 40 maxillary anterior teeth were prepared and obturated with gutta-percha and AH plus using lateral compaction technique. Apical 3mm of the roots were resected and retrograde cavities were prepared with diamond coated ultrasonic retrotip. Teeth were divided randomly into two main groups (I,II) according to blood contamination of retrograde cavities and every group then divided into two sub-groups (A,B) according to retrograde materials (MTA,ERRM). Teeth sectioned longitudinally and examined for marginal gap using SEM. Results: revealed …
Microleakage Evaluation Of Class V Resin Composite Restorations With Fluoride Iontophoresis Application On Tooth Surface(An In Vitro Study), Mohamed Wakwak
Microleakage Evaluation Of Class V Resin Composite Restorations With Fluoride Iontophoresis Application On Tooth Surface(An In Vitro Study), Mohamed Wakwak
Al-Azhar Journal of Dentistry
Purpose: This study was directed to evaluate the microleakage of class V composite restoration after fluoride Iontophoresis application on tooth surface. Materials and Methods :60 freshly extracted human non carious premolar teeth were used box-shaped Class V cavities (4x2x2 mm) were prepared on the gingival one third of the tooth with occlusal margin in enamel and gingival margin in cementum half of the teeth received fluoride Iontophoresis application (FI), while the other half were not received any treatment (NF). Teeth were restored with Z250 resin composite and Kalore resin composite. The specimens stored for one month, three months and six …
Effect Of Different Concentrations Of Double Antibiotics Used In Regenerative Endodontic On Microhardness And Fracture Resistance Of Radicular Dentin, Hadeer Mostafa, Wael Kamel, Maha Elhosiny
Effect Of Different Concentrations Of Double Antibiotics Used In Regenerative Endodontic On Microhardness And Fracture Resistance Of Radicular Dentin, Hadeer Mostafa, Wael Kamel, Maha Elhosiny
Al-Azhar Journal of Dentistry
Purpose: to show the effect of different concentrations of double antibiotics paste (DAP) 1, 0.1,0 .01mg/ml used in regenerative endodontic on microhardness and fracture resistance of radicular dentin. Material and methods: Forty single rooted teeth were prepared and randomized into three groups according to DAP concentration (10 samples each) and ten samples were availed as control group. Group I: root canal contained 1mg /ml DAP. Group II: root canal contained 0.1mg /ml DAP. Group III: root canal contained 0.01 mg/ml DAP. Samples were stored at 37 0c with 100% humidity for three weeks then DAP was removed by irrigation with …
Comparison Of The Cleaning Effectiveness And Incidence Of Dentinal Defects After Biomechanical Preparation Using Different Ni Ti Rotary Instruments In Root Canals, Maiada Mohammed, Wael Kamel, Mohammed Rokaya
Comparison Of The Cleaning Effectiveness And Incidence Of Dentinal Defects After Biomechanical Preparation Using Different Ni Ti Rotary Instruments In Root Canals, Maiada Mohammed, Wael Kamel, Mohammed Rokaya
Al-Azhar Journal of Dentistry
Purpose: This study was directed to evaluate the cleaning effectiveness& the dentinal defects incidence after preparation with different Ni-Ti rotary instruments in permanent molar root canals. Materials and Methods: A 60 human permanent lower first molars were used in this study. According to the Ni-Ti rotary system used in canal instrumentation, specimens were divided into 3 main groups (n=20) (One Shape, HyFlex EDM and XP-Endo Shaper). Each system was used as the suggested settings by manufacture. Each group was received Copious irrigation with 2.6% NaOCl was performed after the use of each file and finally with combination of 17% EDTA …
Fracture Resistance And Retention Of Three Different Endocrown Materials, Nada Eisa, Eman Essam, Rania Amin, Zainab El Sharkawy
Fracture Resistance And Retention Of Three Different Endocrown Materials, Nada Eisa, Eman Essam, Rania Amin, Zainab El Sharkawy
Al-Azhar Journal of Dentistry
Purpose: The purpose of the current study was to assess fracture resistance and retention of three different endocrown materials. Materials and Methods: Thirty (n=30) sound mandibular molars were endodontically treated and according to endocrown constructed material appointed arbitrarily into 3 groups (n=10 each); Group (1): IPS e.max CAD, Group (2): Vita Suprinity and Group (3): Vita Enamic. Samples of each group were additionally subdivided into2 subgroups (n=5 each) according to fracture resistance and retention tests. Subgroup (A): Samples subjected to fracture resistance test and mode of failure. Subgroup (B): Samples subjected to retention test and mode of failure. The samples …
Effect Of Surface Treatment And Veneering Method On The Shear Bond Strength Between Zirconia And Veneering Ceramics, Fatheya Abd El-Rahman, Atef Ahmed, Zeinab El Sharkawy
Effect Of Surface Treatment And Veneering Method On The Shear Bond Strength Between Zirconia And Veneering Ceramics, Fatheya Abd El-Rahman, Atef Ahmed, Zeinab El Sharkawy
Al-Azhar Journal of Dentistry
Purpose: The current study was aimed to assess the effect of various surface treatments: liner, silica coating and laser treatment, and veneering technique on the zirconia veneering ceramic sheer bond strength. Materials and Methods: Sixty four zirconia discs were prepared from Y-TZP ceramic blocks. According to surface treatment, the discs were divided into four groups (n=16); Group I: Control (without any treatment), Group II: liner application, Group III: silica coating, Group IV: laser irradiation. Then they sub grouped into subgroup A (n=8): layering technique and subgroup B (n=8): press–on technique according to the used veneering technique. Two additional specimens from …
Effect Of Material Type And Thickness On Fatigue Resistance Of Posterior Bonded Occlusal Veneers, Radwa Abbas, Mona Mandour, Suad Hasan
Effect Of Material Type And Thickness On Fatigue Resistance Of Posterior Bonded Occlusal Veneers, Radwa Abbas, Mona Mandour, Suad Hasan
Al-Azhar Journal of Dentistry
Purpose: The purpose of the current study was to evaluate the fatigue resistance of zirconia reinforced lithium silicate (VS) and hybrid ceramic (VE) occlusal veneers, with two different thicknesses. Materials and Methods: twenty extracted human maxillary first molars were prepared to replicate worn occlusal table. Samples were distributed into two groups according to the received occlusal veneers material; Vita Suprinity and Vita Enamic, each group was further subdivided into two subgroups according to the thickness of the occlusal veneers (0.6mm or 1.2mm). The samples were cemented by self-adhesive resin cement. Samples were subjected to step fatigue resistance test, Assessment of …
Effect Of Different Surface Treatments On The Light Transmission And Adhesion Of Two Types Of Glass Fiber Posts, Samira Abdel Salam, Sahar Abdel Aziz, Walaa El Mekkawi
Effect Of Different Surface Treatments On The Light Transmission And Adhesion Of Two Types Of Glass Fiber Posts, Samira Abdel Salam, Sahar Abdel Aziz, Walaa El Mekkawi
Al-Azhar Journal of Dentistry
Purpose: The purpose of the current study was to compare the effect of different surface treatments on the light transmission and adhesion of two types of posts. Materials and Methods: Two groups of glass Fiber post specimens (Glassix) Conventional glass fiber post and (Glassix plus) Translucent glass fiber posts were prepared 10 mm length and 1.5 mm diameter (n = 40). The groups were classified into four sub groups (n=5): Group 1: Did Not receive any treatment; Group 2: treated with hydrofluoric acid (HF) 9.6%. Group 3: treated with 110 μm Al2O3; Group 4: exposed to (Er-Cr:ySGG) laser. The light …
Fracture Resistance And Retention Of Cad/Cam Endo-Crowns Using Different Preparation Designs, Shahenda Elsaid, Atef Ahmed, Suad Hassan
Fracture Resistance And Retention Of Cad/Cam Endo-Crowns Using Different Preparation Designs, Shahenda Elsaid, Atef Ahmed, Suad Hassan
Al-Azhar Journal of Dentistry
Purpose: to study the influence of different preparation designs on fracture resistance and retention of CAD/CAM endocrowns. Materials and methods: Forty human mandibular molars were selected to conduct the present study. All teeth were randomly divided into 2 groups (n=20 each) according to the preparation design of endocrown, Group (1): Endodontically treated teeth without ferrule (butt joint). Group (2): Endodontically treated teeth with 1mm ferrule. All prepared teeth were restored using IPS e-max CAD endocrowns. After cementation of endocrowns all specimens were subjected to thermal cycling in automated thermocycling machine in order to mimic the intra-oral condition. Then retention was …
Phase Transformation, Surface Topography And Mechanical Properties Of Hydrothermal Aged Laser Treated Cubic Versus Tetragonal Zirconia Ceramics, Shahenda Abdallah, Inas Motawea, Mostafa Abdel Ghany, Rania Amin
Phase Transformation, Surface Topography And Mechanical Properties Of Hydrothermal Aged Laser Treated Cubic Versus Tetragonal Zirconia Ceramics, Shahenda Abdallah, Inas Motawea, Mostafa Abdel Ghany, Rania Amin
Al-Azhar Journal of Dentistry
Purpose: This study was carried out to compare the effect of laser surface treatment on cubic and tetragonal zirconia ceramics regarding; phase transformation tetragonal-monoclinic (T-M), surface topography, mechanical properties and biaxial flexural strength before and after low thermal degradation (LTD) aging. Materials and Methods: sixty discs (N=60) of CAD/CAM zirconia were used in this study. These specimens were divided into two main groups according to type of zirconia. Group I: (n=30) Cubic Zirconia (DD cubeX2), while Group II: (n=30) Tetragonal zirconia (Superfect-Zir). Then each group further subdivided into two subgroups according to surface treatment, subgroup (1): control without surface treatment, …
Marginal Accuracy And Microleakage Of Machinable Laminate Veneers, Heba Ahmed, Eman Essam, Osama Saleh, Walaa El Mekkawi
Marginal Accuracy And Microleakage Of Machinable Laminate Veneers, Heba Ahmed, Eman Essam, Osama Saleh, Walaa El Mekkawi
Al-Azhar Journal of Dentistry
Purpose: The current study aimed to evaluate the marginal accuracy and microleakage of machinable laminate veneers. Materials and Methods: Twenty-four human maxillary central incisor teeth were collected and prepared (butt-joint preparation) to receive laminate veneers. They were divided into three groups (n=8) according to material of construction: Group I: IPS-Emax CAD, Group II: Vita Suprinity, Group III: Celtra-Duo. The veneers were milled from the blocks in a CEREC 3 Machine. All veneers were cemented with resin cement. All samples had been subjected to 1500 thermal cycles which are equivalent to one year and half of clinical use. Marginal gap (pre …
Effect Of Xp-Endo Finisher On Post-Instrumentation Pain After Using Different Niti Rotary Systems, Mai Hanafy, Wael Kamel, Mohsen Nour El Din
Effect Of Xp-Endo Finisher On Post-Instrumentation Pain After Using Different Niti Rotary Systems, Mai Hanafy, Wael Kamel, Mohsen Nour El Din
Al-Azhar Journal of Dentistry
Purpose: This study was conducted to assess and compare the effect of XP-endo Finisher on post-instrumentation pain after using either One Shape single-file rotary system or ProTaper Universal multi-file rotary system in root canal preparation. Materials and Methods: Forty-eight consented patients, with 52 single-rooted teeth requiring endodontic treatment were selected for this study based on inclusion/exclusion criteria. Teeth were randomly assigned into two equal groups according to the NiTi rotary system used for root canal preparation, Group (I), One Shape rotary system was used and Group (II), ProTaper Universal rotary system was used. Each group was further subdivided into two …
Remineralizing Effect Of Nanofilled Glass Ionomer Combined With Titanium Dioxide Nanoparticle And Nanohydroxyapatite In Root Caries-Like Lesions, Meneg Muhriz, Maha Niazy, Doaa Elsharkawy
Remineralizing Effect Of Nanofilled Glass Ionomer Combined With Titanium Dioxide Nanoparticle And Nanohydroxyapatite In Root Caries-Like Lesions, Meneg Muhriz, Maha Niazy, Doaa Elsharkawy
Al-Azhar Journal of Dentistry
Purpose: This study designed to evaluate the remineralizing effect of nanofilled glass ionomer combined with titanium dioxide nanoparticle and nano hydroxyapatite in root caries like-lesions. Materials and Methods: sixty specimens from sound human premolars, standardized rounded class V cavities were prepared in the middle of cervical one third of the labial surface of root. Then the specimens were divided into three main groups according to the experimental restored material (20 specimens each). Group (A): received nanofilled glass ionomer (NGI), group (B): received 10% nano hydroxyapatite (NHA) incorporated into conventional glass ionomer (GI), and group (C): received 10% titanium dioxide nanoparticles …