Sandy Samir Alphonse Sawares, Hossam Mohamed Essam Eldin Tewfik And Mohamed Mokhtar Nagy,

ABSTRACT
The Aim Of The Present Study Was To Evaluate The Antimicrobial Action Of Green Tea Extract When Used As Root Canal Irrigant. Forty Five Extracted Human Teeth Were Divided Into 3 Experimental Groups According To Type Of Irrigant Used (Green Tea, NaOCl And Saline). Teeth Were Decoronated, Instrumented, Sterilized And Then Teeth Were Incubated With Culture Suspension Of Enterococcus Faecalis. After Application Of Irrigant The Colonies Of E. Faecalis Of Each Group Were Counted To Evaluate Antimicrobial Efficacy. The Results Showed That The Samples Irrigated With NaOCl Showed Lowest Mean Value Of Bacterial Population Followed By Green Tea And Then Saline With A Statistically Significant Difference Between Groups.

Hatem Amer, Layla Hafed, Yasmine Alaa Eldin, Sally Ibrahim, Nada Nour Eldin And Hind Salem,

ABSTRACT
Warthin?s Tumor (papillary Cystadenoma Lymphomatosum) Is A Benign Tumor Of The Parotid Gland. Extraparotid Tumors Are Occasionally Detected. The Following Is A Case Report Of An Extra-parotid Warthin?s Tumor (submandibular Salivary Gland) With A Review Of The Important Clinical And Histopathologic Features Of This Tumor.

Mennat Allah Aboulnaga, Olfat Alsayed Hassanien And Asmaa Ali Yassen,

ABSTRACT

Objectives: To Evaluate The Change In Mineral Content And Ultra-morphological Picture Of Demineralized Enamel After Being Treated With NovaMin Application With And Without Poly-acrylic Acid- Bioactive Glass Powder Air Abrasion After 24 Hours And 3 Month From The Remineralization Period.

Materials and Methods: Eleven Sound Extracted Premolar Human Teeth Were Used. Each Tooth Was Divided Into 2 Halves (22 Specimens) The Buccal For Group P1 (preconditioned Group) And The Lingual For Group P2 (no Preconditioning). Specimens Were Assessed Before (T0), After (T1) Demineralization, After 24 Hours (T2) And Three Months (T3) From The Remineralization Period And Storage In Artificial Saliva. Pre-conditioning Was Induced By Air-abrasion Using Bioactive Glass 45S5 And Polyacrylic Acid Powder Mixture. Subsequently, Specimens Were Treated By NovaMin (Restore-DR Collins-USA). Quantitative Energy Dispersive X-ray Spectroscopy Elemental Analysis Was Performed On Enamel To Determine Ca/P Ratio Levels. The Ultra-morphological Analysis Was Done Using The Environmental Scanning Electron Microscope To Determine The Interprismatic Distance.

Results: 24 Hours After Remineralization Period Group Revealed The Highest Ca/P Ratio For Both Preconditioned And Without Preconditioning Protocols. Three Months After Remineralization And Intact Enamel Showed Similar Ca/P Ratio Mean Values. The Highest Inter-prismatic Space And The Lowest Ca/P Ratio Were Recorded In The Demineralized Groups. The Lowest Interprismatic Space Was Shown In The Intact Enamel Conclusion: Enamel Preconditioning With Bioactive Glass Did Not Play A Role In Its Remineralization. Novamin Is A Successful Remineralizing Agent. Time Had No Effect On The Enhancement Of The Already Remineralized Enamel.

Mostafa Mahmoud El Ghazali ; Amira Farid El Zoghbyand Mona Fadel Mohamed,

ABSTRACT
Objective: This Study Was Conducted To Evaluate And Compare The Internal Adaptation Of Two Bulk Fill Resin Composites; Admira Fusion X-tra And X-tra Fil In Class II Using 3 Different Techniques.

Materials and Methods: 48 Extracted Human Molars Were Selected And Divided Into 2 Groups; Admira Fusion X-tra And X-tra Fil. Each Group Was Sub-divided Into 3 Sub-groups According To The Application Technique; Bulk Fill, Split-bulk And Centripetal. Occluso-mesial And Occluso-distal Cavities Were Prepared And Restored Using Etch And Rinse Adhesive System (Solobond M). The Bulk Fill Resin Composites Were Applied Using One Of Three Techniques; Bulk, Split-bulk Or Centripetal Techniques. The Specimens Were Sectioned Followed By Caries Detecting Dye Application And Were Examined Using Stereomicroscope. Images Were Analysed To Detect The Internal Gaps.

Results: Both Types Of Bulk Fill Resin Composites Showed Insignificant Differences When Applied In Bulk Or Split-bulk Techniques. However, X-tra Fil Resin Composite Showed Statistically Significant Higher % Of Gap Formation When Applied In Centripetal Technique.

Conclusions: When Using Bulk Or Split-bulk Techniques, Either Of The Bulk Fill Resin Composites Can Be Applied To Get Equivalent Effect On Internal Adaptation. Combination Between Ormocer-based Resin Composite And Centripetal Technique Provides Proper Internal Adaptation With Less Gaps.

Sara Mohamed Zaki El.Din Hefny, Sherine Ezz El Din Taha And Soad Abdelmoniem Abdelmoniem,

ABSTRACT


Introduction: Prediction Of The Mesio-distal Dimensions Of Unerupted Permanent Canines And Premolars During The Mixed Dentition Allows The Dentist To Better Manage Tooth Size/arch Length Discrepancies.1

Aim: To Determine The Combined Mesio-distal Widths Of The Permanent Mandibular Incisors And That Of The Maxillary And Mandibular Canine And Premolars In A Group Of Egyptian Children In Alexandria Governorate And To Correlate Between The Widths Of These Teeth To Formulate Normative Data For The Egyptian Children.

Materials and Methods: This Study Conducted On 200 Egyptian Children With An Age Range From 12 To 15 Years Selected Randomly From Three Different Hospitals In Alexandria Governorate. Upper And Lower Impressions Were Taken. Each Impression Was Poured Immediately By Dental Stone. Mesio-distal Widths Of Mandibular Incisors And Maxillary And Mandibular Canines And Premolars Were Measured From The Study Models Using An Electronic Digital Caliper. Data Were Collected And Statistically Analyzed.

Results: There Was Statistically Significant Difference Between Boys And Girls For The Mesio-distal Width Of All Mandibular And Maxillary Teeth. No Statistically Significant Difference Between The Mean Mesio-distal Widths Of The Teeth On Right And Left Sides For Boys And Girls. There Was Positive Significant Correlations Found Between The Mesio-distal Widths Of Upper/lower Canine And Premolars With The Lower Incisors In Right And Left Sides For Boys And Girls. A New Prediction Equations Were Concluded And Proposed From The Results Of This Study Sample. Conclusion: Due To Sexual Dimorphism Found In This Study Sample, The Mesio-distal Teeth Widths Should Be Measured Separately In Boys And Girls. No Teeth Size Discrepancy Between Right And Left Sides In Boys And Girls. So, If Teeth On One Side Are Missing, The Measurements Of Teeth In The Other Side Can Be Used Interchangeably To Represent The Missing Teeth. Due To The Positive Correlation Found Between Mesio-distal Widths Of Upper And Lower Canines And Premolars And Lower Incisors So, We Can Predict The Mesio-distal Width Of Unerupted Canines And Premolars By Measuring The Early Erupting Lower Incisors.

Walaa M Abd El Latif, Saied M Abd El Aziz And Reham M Seyam,

ABSTRACT
The Purpose Of This Randomized, Double-blind, Controlled Study Was To Assess The Effect Of Addition Of Amoxicillin To AH Plus In Single Visit Endodontics On Post Endodontic Flare Up In Asymptomatic Necrotic Teeth. Forty-six Patients Were Randomized And Allocated To Experimental And Control Groups Where Amoxicillin Was Added To AH Plus In The Experimental Group While AH Plus Had Been Used Alone In The Control Group. Flare Up Was Considered As Moderate-to-severe Postoperative Pain And/or Moderate To Severe Swelling That Began 12 To 48 Hours After Treatment And Lasted At Least 48 Hours. The Results Demonstrated That 2.3% Of The 46 Patients Had A Flare-up. Of The Five Patients Who Had Flare-ups, 2 Were In The Amoxicillin Group And 3 Were Not. There Was No Statistically Significant Difference Between Both Groups (P=1.000). We Concluded That The Addition Of Amoxicillin To AH Plus Had No Effect On Flare-up In Asymptomatic Necrotic Teeth.

Maie Hamdy Elakkad; Manal Mostafa ElAssaly And Heba Mohamed Hakam,

ABSTRACT
This Research Was Designed To Compare The Efficacy Of Local Irrigation Of Simvastatin (SIM) In The Relief Of The Symptoms Accompanying Pericoronitis Versus Normal Saline Solution.

Materials & Methods: 30 Male Volunteers, Age 18-28 Years Old Suffering From Pericoronitis Were Divided Into 3 Groups 10 Volunteers Each: Group 1 (Control): Where Immediate Operculectomy Was Done, Group 2 (experimental): Who Received Normal Saline Solution Irrigation & Group 3 (experimental): Received Irrigation Of Prepared SIM Solution. Operculectomy Was Performed On The 2nd And 4th Days Post Irrigation For 5 Volunteers Each Time In Both Groups 2 & 3. Excised Opercula Were Examined Both Histologically & Immunohistochemically For Localization Of TNF-� & BMP-2.

Results: Histological Examination Revealed That Both Normal Saline And Simvastatin Solution Improved The Histological Signs Of Inflammation With Superior Results Of The Later. The Highest Mean Value Of TNF-� Was Found In Group 1 (control) (38.98 � 7.60) While The Least Mean Value Of TNF-� Was Found In Group 3 (experimental) (3.15 � 1.34) After 4 Days Of Simvastatin Irrigation. The Highest Mean Value Of BMP-2 Was Found In Group 3 (experimental ) (31.95 � 7.61) After 4 Days Of Simvastatin Irrigation While The Least Mean Value Of BMP-2 Was Found In Group 1 (control) (9.26 � 1.72). Conclusion: Irrigation Using Simvastatin Solution Was More Effective Than Normal Saline On Both Histological& Immunohistochemical Levels.

Ahmed Alsaid Othman, Rabab Mubarak And Marwa Sameer Moussa,

ABSTRACT
Background: Stem Cells From Human Exfoliated Deciduous Teeth (SHED) Are Considered One Of The Simplest; The Most Convenient Source Of Adult Stem Cells. The Study Aimed To Examine The Proliferative Effect Of Fibroblast Growth Factor 6 (FGF-6) On SHED And On CDK2 And MATEK Derived Microvesicles Genes Expression. Methods: SHED Was Cultured From Deciduous Teeth Pulp. SHED Were Divided Into Two Groups; Control Group And Test Group Without And With FGF-6 Supplementation Respectively. At The Third Passage, SHED Proliferation Was Assessed By MTT Assay. MVs Were Purified And CDK2 And MATK Genes Expression Were Assessed By Real Time Polymerase Chain Reaction.

Results: SHED Were Identified By Their Positivity For CD90 And CD73 And Negativity For CD 45 And CD 34. SHED Proliferation In The Test Group Was Significant In Comparison To Control Group (P < 0.001). SHED Derived MVs? MRNA From The Test Group Demonstrated A Remarkable Elevated Expression Of CDK2 And MAKT, (P< 0.002) (P< 0.005) Respectively In Comparison With Those Of The Control Group. Conclusion: FGF-6 Enhances Proliferation Of SHED. It Is Favorable For The Production Of Large Number Of Stem Cells Which Is Beneficial To Cell Based Therapies. SHED Derived MVs CDK2 And MAKT Can Be Used As Molecular Biomarkers For SHED Proliferation.

Rehab Ali Farag, Maged M. Negm, Magdy M. Ali And Lamia I. Ahmed,

ABSTRACT


Aim: To Evaluate The Effect Of Adding White Portland Cement, In The Ratio Of 25% By Weight, On The Physical Properties Of MTA Fillapex. Methodology: White Portland Cement (WPC) Powder Was Incorporated Into The Paste Of Mixed MTA Fillapex In The Ratio Of 25% By Weight. Different Properties Including Powder-paste Ratio, Strength Properties, Setting Time, Film Thickness, Water Solubility, And Push Out Bond Strength Were Studied In Comparison To MTA Fillapex.

Results: The Experimental Material Showed Higher Setting Time, Higher Film Thickness, Higher Solubility, Higher Diametral Tensile Strength, And Higher Compressive Strength, Though The Last One Was Not Statistically Significant. On The Other Hand, The Push Out Bond Strength Of The Experimental Material Was Significantly Lower.

Conclusions: Addition Of Portland Cement To MTA Fillapex Increases Its Setting Time, Film Thickness, Solubility, Diametral Tensile Strength And Compressive Strength. However, Its Push-out Bond Strength Decreased.

Norhan Ali Abdel-Halim, Maha Eshak Amer And Nasr Mohamed M. Osman,

ABSTRACT


Purpose: Assessment Of Cervical Lymph Nodes In Young Adults By Ultrasonography. Subject And Methods: The Neck Examined By Ultrasound In 25 Healthy Subjects, 2.3_40 Years Old. The Ultrasonographic Features Of Lymph Nodes As Long Axis Dimension, Short Axis Dimension, Shape, Short -to- Long Axis Diameter (S/L), Presence Of Fatty Hilum, Nodal Borders Were Documented. In Addition Relation Between Age And Gender Were Investigated.

Results: In Cervical Lymph Nodes A Decrease In Short Axis Diameter Was Statistically Significantly Associated With Aging (p=0.02), And 100 % Of Cases Were Oval In Shape And 56% With S/L Ratio �0.5 And 44% With S/L Ratio >0.5. 100 % Of Cases Were With A Preserved Central Fatty Hilum. 100% Of Cases Were With A Smooth Outline. 100% Of Cases Were Hypoechoic With A Hyperechoic Central Fatty Hilum. The Mean Average Size Of Normal Cervical Lymph Nodes Were 0.8 Cm (8mm). The Maximal Short Dimension Was 8 Mm Or Less.

Conclusions: Ultrasonography Is A Useful Non-invasive, Non-ionizing Imaging Tool For The Initial Investigation Of Cervical Lymph Nodes. It Provides An Accurate Imaging For Head And Neck And Provides Useful Information Of Lymph Nodes As Shape, Size, Nodal Borders, Presence Of Fatty Hilum.