Dentistry Commons^™

Efficacy Of Chitosan As Root Canal Irrigant In Removing Smear Layer In Curved Root Canals Using Endovac Irrigation System (Sem Study), Sara El Zayat, Mervat Fawzy, Hagar Bastawy

Al-Azhar Journal of Dentistry

Purpose: This study aimed to evaluate the efficacy of Chitosan as root canal irrigant with Endovac irrigation system in removing smear layer of curved root canal walls using Scanning Electron Microscope (SEM). Materials and Methods: Fifty extracted human first mandibular molars were selected with curved mesiobuccal root (20º-35º). Samples were instrumented with Universal ProTaper rotary files till size F4 then divided into 2 main experimental groups according to the final rinse used; Group I: irrigated with 17 % EDTA Group II: irrigated with 0.2% chitosan acetate and control group, irrigated with sterile saline (10 samples). Each group was further subdivided …

Influence Of Motion Pattern On Shaping Ability Of Two Single File Systems In Curved Root Canals, Rania Elnahas, Wael Kamel, Mohamed Rokaya

Al-Azhar Journal of Dentistry

Purpose: This study was conducted to compare and evaluate the influence of motion pattern on shaping ability of two single file systems (Reciproc and Neoniti) in severely curved mesiobuccal (MB) root canal of human mandibular first molars using cone beam computed tomography (CBCT) scanning. Materials and Methods: Forty non-calcified Mesio-buccal root canals with mature apices and apical curvature of 20-45o and Radius less than 15mm were selected from extracted human mandibular first molars. The samples were divided according to the instrument (n=20) into group I (Reciproc R 25/08) and group II (Neoniti R 25/08). Each group was subdivided according to …

Effect Of Incorporation Of Self-Healing Microcapsules To Experimental Resin Composite On Some Mechanical Properties, Passant Abdel Hameed, Inas Motawea, Hisham Essawy, Heba Eltayeb

Al-Azhar Journal of Dentistry

Purpose: The present study aimed to investigate the effect of incorporation of the new Triethylene glycoldimethacrylate and N,N-Bis(2-hydroxyethyl)-p-toluidine (TEGDMA)- (DHEPT) in polyurea formaldehyde (PUF) micro-capsules into an experimental dental resin composite on the flexural strength and fracture toughness and the evaluation of its self- healing efficacy. Materials and Methods: Polyurea formaldehyde microcapsules were synthesized by insitu polymerization technique, encapsulating a triethylene glycol dimethacrylate and dihydroxy ethyl para toluidine (TEGDMA–DHEPT) as a healing liquid, then experimental composite resin is prepared. Microcapsules are incorporated in the resin composite with concentrations 0%, 2.5%, 5%, 7.5% and 10%, then experimental resin composite specimens were …

Lasting Impressions College Of Dental Medicine, Nova Southeastern University

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No abstract provided.

The Remineralizing Potential Of Nano Bioactive Glass Versus Nanohydroxyapatite On Dentine As Affected By Ph Cycling, Dalia M. Elasser, Maha A. Niazy, Doaa A.E Elsharkawy, Mai Sh Mansour

Al-Azhar Journal of Dentistry

Objective: The aim of this study was to evaluate the remineralizing potential of nano bioactive glass (BG) in comparison with nano hydroxy appetite (HA) incorporated into adhesive on demineralized dentine as affected by PH cycling.Materials and Methods: sixty sound premolars were extracted for orthodontic treatment. Class I Cavities were prepared in premolars with a depth 3mm. The specimens were divided into three treatment groups including 20%BG incorporated into self-etch adhesive (3M ESPE), 20% HA incorporated also into self-etch adhesive, and gel of sodium fluoride NaF was used as a positive control. 37% phosphoric acid was applied for each cavity for …

Clinical Performance And Remineralization Potential Of Different Biomimitic Materials On White Spot Lesions, Raghda A. Kamh, Maha A. Niazy, Mohamed A. El-Yasaky

Al-Azhar Journal of Dentistry

Aim: This study was designed to evaluate and compare the re-mineralization potential of different biomimetic materials; self assembling peptide (P11-4), highly concentrated sodium fluoride agent and combination of fluoride, hydroxyapatite and xylitol paste on the white spot lesions. Materials and Methods: This study was conducted on 45 white spot lesions. Each white spot lesion was scored according to severity using the ICDAS II criteria, then assigned into three groups of 15 lesions each according to the re-mineralizing material used; Group A1: 15 lesions were treated with Self assembling peptide (P11-4) (curodont repair), Group A2: 15 lesions were treated with highly …

The Effect Of Poly Amido Amine Dendrimer, Gluteraldehyde And Their Combination On The Micro Hardness And Micromorphology Of Demineralized Dentin, Asmaa Adel Abd- El-Aziz Khater, Maha Ahmed Niazy, Nevin Abd- El-Aziz Gad

Al-Azhar Journal of Dentistry

Objective: The aim of this study was to evaluate the remineralizing effect of Poly (amido amine) dendrimer, Gluteraldehyde and their combination on demineralized dentin at different time intervals. M ate rials and Methods: A total of one hundred and twenty dentin discs were prepared from extracted teeth (n=120), each dentin sample was immersed in 10% citric acid solution for 30 seconds. The samples were divided into two main groups (60 each) according to the assessment time, one week assessment, and four weeks assessment, These two groups were further subdivided into three groups according to the treatment materials; group (1), (n==10): …

The Effect Of Different Thickness Of Two Types Of Soft Liner On Retention And Electromyography Of Complete Denture, Sara El-Gohary, Nesrin El Mahroky, Dina Kholief

Al-Azhar Journal of Dentistry

Purpose: was to evaluate the effect of different thickness of two types of soft liner (silicone based soft liner and acrylic plasticizer soft liner) on retention and electromyography of complete denture. Material and Methods: Ten patients were selected Age ranging from 50-70 year. Patients were randomly divided into two groups (five patients each group). Group(I) : Each patient received maxillary and mandibular complete denture processed with heat cured acrylic resin denture base, where the mandibular denture was lined with silicone based soft liner (Promedica) with thickness 1mm (groupI-a) and 2mm (groupI-b). Group (II): Each patient received maxillary and mandibular complete …

Effect Of Occlusal Reactive And Thermoplastic Denture Bases On Supporting Structures In Lower Distal Extension Partial Dentures, Yasmin Seif Eldeen Zidan, Hala Mohammad Gamal El-Din, Dina Mahmoud Kholief

Al-Azhar Journal of Dentistry

Aim of study: was to evaluate and compare the effect of occlusal reactive versus thermoplastic partial denture bases on the supporting alveolar structure of mandibular distal extension partial dentures cases. Materials and methods: Ten partially edentulous patients were precisely selected to avoid factors that may adversely affect the results of this study. Removable partial dentures were constructed for all patients following the same procedures and the same design. According to denture base material the selected patients were randomly divided into two equal groups: Group I: five patients received cobalt-chromium partial denture with thermoplastic denture base. Group II: five patients received …

Evaluation Of Sealing Ability Of Zinc Oxide Nano-Particles Versus Conventional Zinc Oxide In Endodontically Treated Teeth (Sem Study), Rana Yaseen, Mohsen Nour El-Din, Mahmoud Mohamed

Al-Azhar Journal of Dentistry

Purpose: The aim of this study was directed to compare the sealing ability of two materials which are conventional zinc oxide and zinc oxide nanoparticles by measuring microleakage of both materials by stereo microscope and scanning electron microscope. Materials and Methods: Seventy extracted single-rooted human teeth with complete roots, fully formed apices and present a single canal without calcification were used. The crowns of all teeth were removed using a water-cooled, slow-speed diamond precision disc, so as to adjust the length of the roots to a standardized length of 16 mm. The samples were randomly divided into two main groups …

Assessment Of Transforming Growth Factor-Β1 In Gingival Crevicular Fluid Around Bony Defects Treated With Platelet Rich Fibrin (Prf) System, Rania Nour, Hamdy Nassar, Hala Hazzaa, Mai Attia

Al-Azhar Journal of Dentistry

Purpose: This study was carried to evaluate and compare the regenerative capacity of PRF mixed with bioactive glass versus PRF mixed with bioactive glass combined with collagen membrane in treatment of intrabony defects. This assessment was based on TGF- β1 concentration in GCF. Patients and materials: A sample of 36 intra bony defects were randomaly divided into; Group I: bioactive glass mixed with PRF. Group II: collagen membrane with bioactive glass mixed with PRF. Group III: open flap debridement only. The GCF TGF-β1 was analyzed by ELIZA at base line, one and three months postoperatively and evaluate the efficacy of …

Assessment Of Osteocalcin In Gingival Crevicular Fluid Around Bony Defect Treated With Platelet Rich Fibrin System, Abeer Taiseer, Hamdy Nassar, Hala Hazza, Mai Attia

Al-Azhar Journal of Dentistry

Purpose: to evaluate the effect of PRF system (PRF mixed with bone graft) in the regeneration of intra-bony defects by assessing osteocalcin in gingival Crevicular fluid. This study was accomplished on periodontal clinical and Radiographic evaluation.Subjects and Methods: A randomized double blind, split-mouth study was undergone on 12 patients with twenty four intrabony defects the selected defects were randomly divided into Group I (Test group): including eight defects that received PRF mixed with grafting material. Group II (Collagen group): including eight defects that received collagen membrane and PRF mixed with grafting material and Group III (Control group): including eight defects …

Effect Of Incorporation Of Bioactive Glass Nano Particles In Adhesive Resin On Microtensile Bond Strength To Dentin In Self Etch And Etch And Rinse Mode, Elsharkawy D.A.

Al-Azhar Journal of Dentistry

Objectives: This study aimed to evaluate the effect of addition of bioactive glass nano particles to an adhesive resin on the microtensile bond strength to dentin in etch and rinse and self-etch mode. Materials and methods: bioactive glass nano particles were prepared and added to a universal adhesive (Single Bond Universal, 3M ESPE) in concentrations of 10% and 20% by wt. 48 dentin specimens were prepared from human sound molars. The occlusal enamel was removed to expose dentin and the specimens were divided into six groups of 8, A1 and B1, received unmodified adhesive, A2 and B2 received adhesive with …

Evaluation Of Alveolar Ridge Preservation Using A Composite Of Bioactive Glass And Platelet Rich Fibrin Alone Or Combined With Melatonin In Chronic Periodontitis Patient, Eman Ali, Naglaa El Kilani, Halaa Hazzaa

Al-Azhar Journal of Dentistry

Purpose: The aim of this randomized controlled clinical trial was the evaluation of alveolar ridge preservation using a composite of bioactive glass and platelet rich fibrin either alone or combined with melatonin in chronic periodontitis patients. This aim was fulfilled through: Clinical assessment and radiographic assessment. Subjects and Methods: A total of thirty extraction sockets in 29 patients were randomly divided into three groups; control group treated by atraumatic extraction alone, test1 group (application of bioactive glass mixed with PRF) and test 2 group (application of bioactive glass mixed with PRF and melatonin gel). The clinical parameters recorded at baseline, …

Biological Mechanisms Of Lithium Separately And In Combination With Caffeine In Palatogenesis In Albino Rat, Hagar Saad, Mona Farid, Heba Adawy

Al-Azhar Journal of Dentistry

Purpose: The purpose of this study was to evaluate the Biological Mechanisms of Lithium separately and in combination with Caffeine in Palatogenesis in Albino Rat Materials and Methods: Thirty six adult rats were used in this study, twenty four female and twelve male rats, after mating procedures and confirmation of pregnancy the pregnant rats were divided into 3 groups :group1(control) , which consists of six pregnant rats and were not receive any medication during gestation, group2’ Which consists of nine pregnant rats and were received prianil (lithium carbonate) 200mg/kg intragasteric During the period of ( 6th to 15th ) day …

The Effect Of Different Cavity Disinfectants On Microleakage And Interfacial Micromorphology Of Class V Resin Composite Restorations Using Two Adhesive Systems (Sem-Study), Ebtsam Kassab, Maha Niazy, Mohammed El-Yasky

Al-Azhar Journal of Dentistry

Purpose: This study was designed to evaluate and compare the effect of different cavity disinfectants on microleakage and interfacial micromorphology of class V resin composite restorations using two adhesive systems. Materials and Methods: Thirty six freshly extracted sound maxillary human premolar teeth were selected. Seventy two standardized class V cavities were prepared on both buccal and lingual surfaces of the selected premolars and randomly divided into three main groups (n=24) according to the cavity disinfectant used (A): silver nanoparticles (A1), ozone (A2), both of them (silver nanoparticles and ozone) (A3). Each group was subdivided into 2 subgroups (n=12) according to …

Assessment Of Alveolar Bone Status Of Periodontally Involved Teeth After Socket Augmentation Using Xenograft And Platelet Rich Fibrin: A Randomized Controlled Clinical Trial, Nesma Ahmed, Mai Attia, Eatemad Shoreibah

Al-Azhar Journal of Dentistry

Purpose: The aim of this randomized controlled clinical trial was to radiographically evaluate hard tissue changes (bone height, width and density) in periodontally involved teeth after socket augmentation using xenograft with platelet rich fibrin compared to xenograft alone and the natural spontaneous healing. Subjects and Methods: A total of thirty extraction sockets in 18 patients were randomly divided into three groups; group I, treated by combined regenerative periodontal therapy (bone grafting using xenograft combined with platelet rich fibrin membrane).group II, treated by bone grafting using xenograft alone and group III, left untreated without bone graft or membrane placement (Control group). …

Nlrx1 Modulates Differentially Nlrp3 Inflammasome Activation And Nf-Κb Signaling During Fusobacterium Nucleatum Infection, Shu Chen Hung, Pei Rong Huang, Cassio Luiz Coutinho Almeida-Da-Silva, Kalina R. Atanasova, Ozlem Yilmaz, David M. Ojcius

All Dugoni School of Dentistry Faculty Articles

NOD-like receptors (NLRs) play a large role in regulation of host innate immunity, yet their role in periodontitis remains to be defined. NLRX1, a member of the NLR family that localizes to mitochondria, enhances mitochondrial ROS (mROS) generation. mROS can activate the NLRP3 inflammasome, yet the role of NLRX1 in NLRP3 inflammasome activation has not been examined. In this study, we revealed the mechanism by which NLRX1 positively regulates ATP-induced NLRP3 inflammasome activation through mROS in gingival epithelial cells (GECs). We found that depletion of NLRX1 by shRNA attenuated ATP-induced mROS generation and redistribution of the NLRP3 inflammasome adaptor protein, …

Using Enamel Matrix Derivative To Improve Treatment Efficacy In Periodontal Furcation Defects, Reza Masaeli, Kavosh Zandsalimi, Zahra Lotfi, Lobat Tayebi

School of Dentistry Faculty Research and Publications

Purpose

Furcations are complicated periodontal defects. Untreated furcations lead to loss of the involved teeth and supporting tissues. It has been demonstrated that regenerative biomaterials are beneficial in reconstruction of the bone surrounding furcation‐affected teeth. These biomaterials range from bone grafts and nonresorbable/resorbable barrier membranes to biologics that are able to trigger inactive regenerative processes in periodontal tissues. Selection of appropriate material(s) to treat furcations is challenging. The aim of this article is to provide a comparative outlook on different biomaterials applicable in regeneration of furcations with a focus on enamel matrix derivative (EMD).

Methods

Scientific databases including PubMed/MEDLINE, ScienceDirect, …

Ada News - 10/01/2018, American Dental Association, Publishing Division

ADA News

Established in 1970 as the official newspaper of the American Dental Association, the ADA News serves practicing dentists and others allied to the dental profession in the U.S. and internationally. It is the No. 1 source of news and information about the many benefits and services the ADA delivers to members daily as well as timely information on scientific, social, political and economic developments affecting dentistry and health care.