Dentistry 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.

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% …

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.

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 …

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.