Endodontics and Endodontology Commons^™

Root And Canal Morphology Of Mandibular Second Molars In An Egyptian Subpopulation: A Cone-Beam Computed Tomography Study, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Background: This study was using Cone beam computed tomography (CBCT) to examine the anatomical variations in mandibular second molars in an Egyptian sub-population. Methods: A total of 350 CBCT images (215 females and 135 males, aged 15–65 years) of mandibular second molars were evaluated. Samples were evaluated in terms of: number of roots, number of root canals, roots’ cross section as well as prevalence and configurations of C-shaped canals. Statistical analysis was done to highlight differences between different categories and their prevalence among genders (significance level was set at p < 0.05). Data were presented as frequency and percentage values and were analyzed using chi square test followed by pairwise comparisons utilizing multiple Fisher’s exact tests with Bonferroni correction. The significance level was set at p < 0.05 within all tests. Results: Of the 350 mandibular second molars evaluated, 87.2% were non-C-shaped while 12.8% were C-shaped with no gender-based statistically significant differences (χ2 = 0.19, p = 0.656). Most samples had three root canals (80%) followed by two (16%), then one (3.2%), and finally four (0.8%) root canals. Among the non-C-shaped molars, presence of two roots was most common (83.4%) followed by presence of a single root (16.2%), and only one sample (0.2%) had three roots, and this had no correlation with gender (χ2 = 1.86, p = 0.431). In the mesial roots Type IV Vertucci was the most common configuration found (68.8%), while Type I was the most prevalent in the distal roots (91.8%). The long oval configuration was the most commonly found cross section in mesial roots while “oval” was the most prevalent in distal roots. Conclusion: Egyptian sub-population shows highly variable morphological features in mandibular second molars, hence, CBCT is highly recommended on case-to-case conditions.

The Biomechanical Behaviour And Life Span Of A Three-Rooted Maxillary First Premolar With Different Access Cavity Designs: A Finite Element Analysis, Shehabeldin Mohamed Saber Prof.Dr., Nawar Nawar

Dentistry

Objective: The present study aimed to evaluate the influence of different access cavity designs on the biomechanical behaviour of a three-rooted maxillary first premolar using finite element analysis (FEA).

Methods: Three experimental FEA models were generated: the intact tooth (IT) model, the traditional access cavity (TAC) model, and the conservative access cavity (CAC) model. In both TAC and CAC models, root canals preparation was simulated as follows: the mesiobuccal and distobuccal canals with a final tip size of 30 and taper of 0.04 and the palatal canal with a final tip size of 35 and taper of 0.04. Cyclic loading …

Access Cavity Design, Caries Driven Access, Canal Preparations, Finite Element Analysis, Mohamed Medhat Kataia, Mohamed Kataia

Dentistry

Aim: This study evaluated the influence of different access designs on maxillary two-rooted premolar teeth to assess their biomechanical behavior using finite element analysis. Methodology: Three simulated FEA models were accessed with three main different access cavity designs: the intact tooth (IT) model, the traditional access cavity (TAC), and the conservative access cavity (CAC). Two different radicular preparations were done for each simulated model. The buccal and palatal canals were prepared to the apical sizes #30/.04, and #40/.04. A cyclic load of 50 N was applied on the occlusal surface. The patterns of stress distribution, the maximum von Mises (VM), …

Effect Of Different Sealers On The Cytocompatibility And Osteogenic Potential Of Human Periodontal Ligament Stem Cells: An In Vitro Study, Shehabeldin Mohamed Saber Prof.Dr., Shereen Nader

Dentistry

Background: There is tendency for unavoidable sealer extrusion in some clinical cases. This might adversely affect host stem cells and affect healing. This study aimed to investigate the effect of different sealers on the cytocompatibility and osteogenic potential of human periodontal ligament stem cells (hPDLSCs). Methods: The cytotoxic effect of the extracted elutes of VDW.1Seal (VDW.1), Endosequence BC Sealer HiFlow (ES), GuttaFlow-2 (GF), and ADSeal (AD-S) on the hPDLSCs was determined using the MTT assay. Cell proliferation and migration were assessed by the scratch wound healing assay. Osteogenic differentiation potential was assessed. Measurement of pH values and calcium ions release …

Assessment Of The Clinical Outcomes Of Single Visit Regenerative Endodontic Procedure In Treating Necrotic Mature Teeth With Apical Periodontitis Using Biological Irrigating Solution, Mohamed Medhat Kataia

Dentistry

Aim: to observe the effect of propolis and its nano counterpart when used as final irrigation materials and compare them to the conventionally used EDTA and saline on the clinical outcomes of necrotic mature anterior teeth with apical periodontitis after treating them using regenerative endodontic procedure.

Methodology: 84 patients who fulfilled the inclusion criteria were recruited for the study. Access cavity was prepared, rubber dam isolation was done. Mechanical preparation was performed up to #60 using K-files. Final irrigation procedure was done as follows:

Group A (Control ): Final irrigation was done using saline (3ml/min) followed by 17% …

Effect Of Proximal Caries-Driven Access On The Biomechanical Behavior Of Endodontically Treated Maxillary Premolars, Engy M. Kataia

Dentistry

Introduction: This study investigated the effects from the carious cavity and access from it on the fracture resistance of endodontically treated maxillary premolars using finite element analysis (FEA). Methods: A maxillary premolar was used to compare three types of access cavity related to having a proximal carious defect: Caries-driven access (CDA), Conservative access that has a mesial component (MCA) as well as traditional access with the same mesial component (MTA). Cyclic loading was simulated on the occlusal surface and number of cycles till failure (NCF) was compared to the intact tooth model (IT). Mathematical analysis was done to evaluate the …

Parallel Endodontic Education Via Social Media: An Exploratory Survey Study, Nawar Nawar, Shehabeldin Mohamed Saber Prof.Dr., Mostafa M.A. Elkholy, William Nguyen Ha, Sebastian Burklein

Dentistry

No abstract provided.

How Loss Of Tooth Structure Impacts The Biomechanical Behavior Of A Single-Rooted Maxillary Premolar: Fea, Nawar Naguib Nawar, Roaa Abdelwahab, Engy M. Kataia, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

No abstract provided.

Anatomical Analysis Of Inferior Alveolar Nerve Relation To Mandibular Posterior Teeth Using Cone Beam Computed Tomography: A Retrospective Radiographic Analysis Study, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Introduction: Cone beam computed tomography (CBCT) is reliable in the assessment of structures related to teeth. The assessment of the inferior alveolar neurovascular (IAN) bundle location using CBCT is considered one of its prime uses in different mandibular surgeries. Methodology: Retrospective CBCT data of patients presented to the institute were assessed to measure relations of IAN. Measurements were taken to assess the bone thickness adjacent to IAN, the superior-inferior dimension between the canal and the teeth, and the dimension between the canal and the inferior border of the mandible. Results: Out of the 170 patients the root apices nearest to …

Financial Impact Of Covid-19 Pandemic On Endodontic Clinics In Egypt: A Questionnaire-Based Report, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Objective: To evaluate the financial impact of the COVID-19 pandemic on endodontic clinics in Egypt. Methods: Two hundred Egyptian endodontists holding a minimum of a master's degree were invited to participate in an online survey in March 2021. Participants accessed the survey link shared on the social media group of the Egyptian Society of Endodontology. Participants read and signed an electronic informed consent before participating in this study. The questionnaire was designed exclusively by the authors. A draft was pilot tested on a sample of 15 endodontic masters' students at The British University in Egypt. Suggestions and comments to improve …

The Impact Of Composition, Core Metal Mass And Phase Transformation Behaviour On The Dynamic Cyclic Fatigue Of Ni-Ti Files At Different Temperatures, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Aim: To assess impact of elemental composition, core metal mass and phase transformation behaviour on the dynamic cyclic fatigue resistance of three Ni-Ti rotary files at room and body temperatures. Methods: Twenty instruments of each system were tested for dynamic cyclic fatigue resistance in a simulated root canal with a 90° angle of curvature and a 5-mm radius of curvature at room and body temperature. The core metal mass at the fractured surface of each instrument was calculated by Image J software analysis of SEM images. The energy dispersive X-ray analysis was used to assess file composition. Scanning calorimetry was …

The Antibacterial Effect And The Incidence Of Post-Operative Pain After The Application Of Nano-Based Intracanal Medications During Endodontic Retreatment: A Randomized Controlled Clinical Trial, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Objective: This clinical trial aimed to evaluate the effect of nano-silver and nano-calcium hydroxide intracanal medicaments (ICM) during retreatment regarding their antibacterial effect and their effect on post-operative pain and flare-ups. Materials and methods: Sixty-nine patients scheduled for endodontic retreatment were included in this randomized clinical trial and randomly allocated to 3 equal groups (n = 23) according to the type of ICM used. The first microbial sampling (S1) representing the original microbiota was obtained after the removal of the old canal filling. After chemo-mechanical debridement, another sample (S2) was obtained representing the microbial state before ICM application. Patients were …

Anatomical Analysis Of Mandibular Posterior Teeth Using Cbct: An Endo-Surgical Perspective, Shehabeldin Mohamed Saber Prof.Dr., Nawar Nawar

Dentistry

Objective: This study sought to analyse the relationship between mandibular posterior teeth and the surrounding anatomical structures. Methods: A total of 170 CBCT images were examined to obtain measurements regarding the following: buccolingual (BL) and mesiodistal (MD) root thickness at the standard level of resection (3 mm from the apex), the thickness of the overlying buccal and lingual bone at the same level, the proximity of the mandibular canal (MC) to the apices of the mandibular posterior teeth, as well as the horizontal location of the mental foramen (MF). Results: The BL root width at 3 mm from the apex …

Assessment The Propolis Effect Versus Calcium Hydroxide Effect As Intracanal Medications On Post-Operative Pain In Necrotic Teeth, Engy M. Kataia

Dentistry

Aim: to evaluate the postoperative pain of using Propolis versus Calcium hydrox- ide as intracanal medications on post-operative pain in necrotic teeth. Subjects and Methods: 40 patients requiring endodontic treatment for single rooted teeth were en- rolled in this analysis. The selected patients were separated into two groups with 20 pa- tients each; Group І: Propolis paste. Group II: Ca (OH)2 paste. The local anesthesia was administrated, and the working length determined by Root ZX apex locator, and then confirmed radiographically. The root canals were mechanically prepared in a crown- down approach using the “TF Adaptive” setting on Elements Motor. …

Influence Of Blood Contamination On The Bond Strength And Biointeractivity Of Biodentine Used As Root-End Filling, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Aim: To evaluate the influence of blood contamination on the bond strength and apatite forming ability of Biodentine used as root-end filling material. Methodology: Eighty (n = 80) extracted single-rooted, sound human maxillary anterior teeth were prepared and obturated. Then, the roots were resected, retrograde cavities were prepared and Biodentine was inserted as the root-end filling material. Teeth were then randomly divided into 2 equal groups (n = 40) according to the setting environment of Biodentine i.e., group A where setting took place in human blood and group B where setting took place in deionized water (control group). Teeth were …

Correlation Between Root Surface Strain And Apical Micro-Cracks Produced During Canal Preparation With Thermally Treated Single Or Multi-File Niti Systems, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Aim: To determine the apical root surface strain (RSS) generated during shaping with thermally treated file NiTi systems, and its association with the development of apical microcracks. Methodology: Twenty extracted human mandibular molars with severely curved mesial roots having two separate canals were prepared using XP-Endo Shaper files (Group A: XPS in mesio-buccal canals) and Hyflex CM files (Group B: HCM in mesio-lingual canals). Pre-instrumentation images of apical surface of each root were obtained with Environmental Scanning Electron Microscope (ESEM). Root surface strain (RSS) generated during canal preparation was measured as micro-strain (ìstrain) using electrical strain gauges fixed on apical …

Antibacterial Potential Of Nano-Particulate Intracanal Medications On A Mature E. Faecalis Biofilm In An Ex Vivo Model, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Aim: To investigate and compare the antibacterial and antibiofilm activity of Chlorhexidine Digluconate functionalized Hydroxyapatite Nanoparticles and silver Nanoparticles as intracanal medicaments on a mature E. faecalis biofilm model in root canals of extracted teeth. Methodology: Sixty-eight human maxillary central incisors were mechanically prepared, sterilized, infected with E. faecalis, and then incubated for 28 days under anaerobic conditions to develop a mature E. faecalis biofilm. Eight teeth were used to monitor biofilm formation and maturation over the incubation period with field emission scanning electron microscopy (Fe SEM), while the other 60 teeth were divided into two experimental groups (n=20) in …

Cyclic Fatigue Resistance Of Three Heat-Treated Nickel-Titanium Instruments At Simulated Body Temperature, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Introduction: The aim of this study was to evaluate the cyclic fatigue resistance of three heat-Treated nickel-Titanium (NiTi) systems at simulated body temperature. Materials and Methods: Twelve instruments of similar apical diameter (#25) from three engine-driven NiTi instruments; WaveOne Gold (WOG), Hyflex EDM (HEDM), and M Pro system were tested for cyclic fatigue resistance at 37°C in simulated root canals with 60° angle of curvature and 5 mm curvature radius. All instruments were operated until fracture occurred. Mean and standard deviation of the time to fracture and fragment length were calculated, and statistical significance was set at 5%. The morphological …

Accuracy, Sensitivity And Specificity Of Three Imaging Modalities In Detection Of Separated Intracanal Instruments, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Aim: To compare the accuracy, sensitivity and specificity of CBCT imaging and two dimensional periapical radiography in detection of separated intracanal endodontic instruments with and without root canal filling. Methodology: Eighty (n=80) extracted mandibular molars were randomly divided into four groups (n=20); control, fracture/non-filled, non-fracture/filled, and fracture/filled. Molars were placed in a mandible for imaging. Conventional 2D radiography using D-speed periapical film (SKYDENT, Slovak Republic), semidirect digital radiographs using Soredex Digora Optime system (DIGORAOptime, Soredex, Finland), and cone beam computed tomography using Gendex-GXDP 800 (GENDEX GXDP-800 Kavo, Germany) were acquired. An artifact reduction algorithm was applied. Images were evaluated by …

Cleanliness Efficacy And Effect On Dentin Microhardness Of A Novel Plant Extract Irrigant, Maram E. Khallaf, Engy M. Kataia, Yousra Aly, Nada Omar, M. Abdullah Mohamed

Dentistry

Objective: This study was done to evaluate the effect of the prepared Moringa oleifera-based root canal irrigant compared to conventionally used irrigants on the microhardness of root dentin and smear layer removal.

Materials and methods: One hundred freshly extracted teeth with single root were divided into 5 groups according to the irrigant used: group 1, saline; group 2, Moringa oleifera; group 3, Moringa oleifera + chlorhexidine; group 4, chlorhexidine; and group 5, sodium hypochlorite. Root canal preparation was done using Protaper universal system till size F5 using one of the irrigants after each file. Fifty teeth were prepared to measure …

Comparison Of Shaping Ability Of Different Single-File Systems Using Microcomputed Tomography, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Objectives To evaluate the shaping ability of four different single-file systems using micro-computed tomography (micro-CT). Materials and Methods Eighty mesiobuccal and mesiolingual canals of permanent mandibular molars were randomly assigned to four groups according to the file used; WaveOne Gold, RECIPROC Blue, HyFlex EDM, and One Shape (n = 20). The samples were scanned using micro-CT for the preinstrumentation record; then the canals were instrumented and scanned for the postinstrumentation records. Statistical Analysis The data were then analyzed statistically using one-way analysis of variance (ANOVA) with the level of significance set at α = 0.05. Results The results of canal …

Assessment Of Physical Properties Of A Zno/E ~Sealer Modified By Adding Moringa Oleifera: An Experimental In-Vitro Study, Engy M. Kataia, `Maram E. Khallaf, Nada Omar, Yousra Aly, Nancy Elshafei

Dentistry

Aim: In an attempt to move toward exploration of the antibacterial properties of herbal products, this study evaluated the effect of how the addition of Moringa would affect the physical properties of the commercial Endofil sealer. Materials and Methods: An experimental in vitro study was performed using three experimental sealers. There were four groups in this study: Group A (ZnO/E sealer alone), Group B (ZnO/E and Moringa root), Group C (ZnO/E and Moringa leaf), and Group D (ZnO/E and Moringa leaf extract liquid). Measurements were carried out according to International Organization for Standardization (ISO) standardization 6876:2012. Moringa oleifera was added …

Root And Canal Morphology Of Maxillary Premolar Teeth In An Egyptian Subpopulation Using Two Classification Systems: A Cone Beam Computed Tomography Study, Shehabeldin Mohamed Saber Prof.Dr.

Dentistry

Aim: To investigate the number of roots and root canal configurations using two coding systems and the root canal diverging and merging levels in extracted maxillary premolars in an Egyptian subpopulation using cone beam computed tomography (CBCT). Methodology: A total of 700 maxillary premolars were examined using CBCT in an Egyptian subpopulation. The number of roots was identified, and root canal configurations were classified according to Vertucci's classification and a new system for classifying root and canal morphology. In addition, the position where roots bifurcated and the levels where canals merged or diverged were identified. Fisher's exact test and independent …

Postoperative Pain After Single Visit Root Canal Treatment Using Multiple Rotary Files And Single Reciprocating File Instrumentation Techniques In Asymptomatic Mandibular Molars With Necrotic Pulps: A Randomized Control Clinical Trial, Mostafa M.A. Elkholy, Kariem M. El Batouty, Ehab Hassanein

Dentistry

Aim This prospective clinical study compared postoperative pain following single visit root canal treatment in patients with asymptomatic mandibular molar teeth with necrotic pulps using two different instrumentation techniques: multi-file rotary (ProTaper Universal), and reciprocating single-file (WaveOne) techniques.

Methodology Forty patients, who fulfilled specific inclusion criteria were randomly and equally assigned to 2 groups according to the root canal instrumentation technique used. All treatments were performed in one appointment. Patients were asked to complete a numerical rating scale (NRS) for recording pain levels at 6, 12, 24, 72 h and at 1 week postoperative intervals. In addition, the Face Pain …