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

Submandibular Salivary Gland Vulnerability: Unveiling Aflatoxin B1-Induced Toxicity And Rosmarinus Officinalis 'S Protective Role, Mohamed Shamel, Mahmoud Al Ankily, Mohamed Mansy, Robert Fua Angeles

Dentistry

No abstract provided.

Early Screening Of Oral Premalignant And Malignant Lesions Using Salivary Biomarkers, Sara Abdelwahed, Mohamed Shamel, Mahmoud Al Ankily, Mohamed Mansy, Myra De Guzman Angeles

Dentistry

No abstract provided.

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), …

The Effect Of Two Sintering Cycles And Aging On Biaxial Flexural Strength Of Strength Gradient Multi-Layered Zirconia (An Vitro Study), Passent Hm El Galab, Maged Zohdy, Fatma Makkeyah, Mustafa Noor

Dentistry

No abstract provided.

Assessment Of Saudi Arabians' Awareness Of Oral Health And Oral Hygiene In A Group Of 200 Dental Clinic Participants, Mahmoud Al Ankily, Mohamed Shamel, Sara Abdel Wahed, Mohamed Mansy

Dentistry

Oral mucosa lesions cause oral sores, discoloration, and anomalies. Oral mucosa genetic and developmental disorders may affect anybody. Oral cavity carcinoma causes 4% of all malignancies worldwide. Early detection of oral cancer improves survival rates. Oral precancerous diseases include color, abnormalities, surface texture, and location that predict malignancy. The goal of this study was to examine the Saudi Arabians' awareness of oral health and oral hygiene. An observational, cross-sectional approach was adopted for the study. Individuals with a probable malignant oral disease who visited an OPD at a dental hospital and had relevant behaviors were recruited in the study. In …

Aesthetic Management Of Peri-Implant Soft Tissue Dehiscence. A Case Report Of A Combined Perio Restorative Approach, Ahmed Hamdy, Dalia M. Ghalwash

Dentistry

This case report designates a combined perio restorative technique in the management of peri-implant 3-dimensional soft tissue defects in an esthetic zone. A staged approach was implemented to treat this case; the first stage was planned to treat the horizontal defect around the implant, in which crown was removed, and coronally advanced flap with connective tissue graft were used to treat the soft tissue defect. At the second stage, a modified coronally advanced flap with connective tissue graft was used to augment the vertical defect, and no vertical releasing incision was made in this stage to maximize the blood supply …

Double Immunohistochemical Analysis Of Pcna And Fak Expression In Selected Odontogenic Lesions, Safaa Baz, Sally Ibrahim

Dentistry

Background: Odontogenic neoplasms and cysts have diverse biological behaviors, ranging from indolence to aggression along a spectrum. The proliferating cell nuclear antigen (PCNA) is an antigen involved in DNA synthesis and proliferation. Focal adhesion kinase (FAK) is a cytoplasmic molecule associated with cellular signaling, growth, and invasion. PCNA and FAK markers have been shown to be involved in neoplastic proliferation, invasion, and migration. Hence, an immunohistochemical assay of PCNA and FAK can be used as a predictive tool for the level of aggressive behavior of odontogenic lesions. Methods: The current study was conducted to evaluate the expressions of PCNA and …

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.

Comorbidity Of Hypertension And Chronic Renal Failure And Their Impact On Oral Complications: A Cross-Sectional Study., Dalia Ghalwash, Sara Abdelwahed, Asmaa Abobakr

Dentistry

The present study aimed to investigate the influence of both end-stage renal diseases (ESRD) and hypertension (HTN) on the various oral manifestations and periodontal condition, to evaluate and compare the oral manifestations and periodontal health status in hypertensive patients with ESRD versus control, and to explore any possible correlation of the oral findings with systemic disease status. This was a cross-sectional study which included two equal groups of patients, Group I were hypertensive patients with ESRD and Group II were hypertensive patients only. All patients were hypertensive and were on antihypertensive medications. Regarding the incidence of oral lesions in both …

Enhanced Human Periodontal Ligament Stem Cell Viability And Osteogenic Differentiation On Two Implant Materials: An Experimental In Vitro Study, Engy Adel Ahmed Farag, Sara Fikry Dr, Shereen N. Raafat

Dentistry

Background: Surface roughness of dental implants impacts the survival of adult periodontal stem cells and rate of differentiation. This research was conducted to test how human periodontal ligament stem cells behaved on yttria stabilized tetragonal zirconia polycrystals and polyetheretherketone (PEEK) discs with different surface topographies.

Methods: Discs roughening was prepared by sandblasting. Stem cells were cultivated on zirconia discs with a polished surface, polyetheretherketone (PEEK) discs with a polished surface, sandblasted zirconia discs and sandblasted polyetheretherketone (PEEK) discs. Cells viability was assessed after 24, 48, 72 hours. Scanning electron microscopy was used to examine the adherence and attachment of cells. …

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.