Shaimaa Sayed Ahmed, Enas Fathelbab Abdelhalim And Shams Waaz Amgad,

ABSTRACT

Objectives: The Study Evaluated Color Stability Of Two Machinable Restorative Materials, Resin Nano Ceramics (Lava Ultimate, 3M ESPE) And Poly Ether Ether Ketone Ceramics (Bio HPP, Bredent GmbH) After Immersion In Different Staining Solutions (coffee, Tea, Pepsi And Distilled Water As Control Group).

Materials and Methods: Forty Upper Central Teeth Were Prepared For Crowns And Divided Into Two Main Groups According To The Type Of Material Used; Twenty For Lava Ultimate And Twenty For Bio HPP. Each Group Was Subdivided Into Four Subgroups Five Specimens Each To Be Immersed In Three Different Staining Solutions; (coffee, Tea And Pepsi( And Distilled Water As Control Group, For Color Stability Test After A Month Using Spectrophotometer.

Results: A Statistical Insignificant Difference In Color Change Mean Values Was Found Between Lava Ultimate Group And Bio Hpp Group, Coffee Showed The Highest Mean Value Of Color Change Followed By Tea Then Pepsi. Conclusion: Resin Nano Ceramic Materials Are More Susceptible To Discoloration Than PEEK Ceramics. Coffee Has The Highest Ability To Stain Restorative Materials.

Shaimaa Sayed Ahmed, Enas Fathelbab Abdelhalim And Shams Waaz Amgad,

ABSTRACT

Objectives: The Study Evaluated Color Stability Of Two Machinable Restorative Materials, Resin Nano Ceramics (Lava Ultimate, 3M ESPE) And Poly Ether Ether Ketone Ceramics (Bio HPP, Bredent GmbH) After Immersion In Different Staining Solutions (coffee, Tea, Pepsi And Distilled Water As Control Group).

Materials and Methods: Forty Upper Central Teeth Were Prepared For Crowns And Divided Into Two Main Groups According To The Type Of Material Used; Twenty For Lava Ultimate And Twenty For Bio HPP. Each Group Was Subdivided Into Four Subgroups Five Specimens Each To Be Immersed In Three Different Staining Solutions; (coffee, Tea And Pepsi( And Distilled Water As Control Group, For Color Stability Test After A Month Using Spectrophotometer.

Results: A Statistical Insignificant Difference In Color Change Mean Values Was Found Between Lava Ultimate Group And Bio Hpp Group, Coffee Showed The Highest Mean Value Of Color Change Followed By Tea Then Pepsi. Conclusion: Resin Nano Ceramic Materials Are More Susceptible To Discoloration Than PEEK Ceramics. Coffee Has The Highest Ability To Stain Restorative Materials.

Nermeen S.G. AlSedawy, Suzan A.W. Amin And Shaima?a I. Gawdat .,

ABSTRACT


Aim: The Aim Of This Prospective, Randomized, Placebo-controlled Clinical Trial Was To Evaluate The Effect Of Pre-operative, Single-dose Clindamycin On Post-operative Pain In Patients With Symptomatic Apical Periodontitis Treated In One Visit. Methods: Seventy-two Participants Diagnosed With Symptomatic Apical Periodontitis In Their Mandibular Posterior Teeth Were Included. Patients Were Randomly Assigned Into Either Of Two Groups: Clindamycin Group, Where A Pre-operative, Single-dose Of Clindamycin (600 Mg) Or Placebo Group, Where Pre-operative Placebo Was Given (n=36). After 30 Minutes Of Receiving Medication, Root Canal Treatment Was Performed In A Single Visit. Patients Were Instructed To Rate Their Pain Felt After Endodontic Procedure In A Pain Diary At 6, 12, 24, 48, 72 Hours And At Day 7 Using A Numerical Rating Scale (NRS). Data Were Statistically Analyzed And The Significant Level (�) Was Set As 0.05.

Results: Both Groups Were Similar Regarding Baseline Characteristics, Including: Age, Gender, Canal-number Distribution, Tooth Type And Preoperative Pain (p>0.05). There Was No Statistically Significant Difference Between Both Groups In Post-operative Pain Intensity Or Incidence At Any Of The Follow-up Time Points (p>0.05). Conclusion: Pre-operative Administration Of A Single-dose Of 600 Mg Clindamycin Does Not Seem To Affect Post-operative Pain Intensity Or Incidence For Patients With Mandibular Posterior Teeth With Symptomatic Apical Periodontitis Treated In A Single Visit.

Fawzy Alshaimaa, El Far Hebatallah, Abou Elfotowh Elsayed And Elasfouri Heba,

ABSTRACT
This Study Was To Evaluate The Effect Of Propolis Compared To Calcium Hydroxide As Intracanal Medicaments On Postoperative Pain In Patients With Necrotic Pulp During Two Visit Treatment. Methods: Fifty Four Participants With Necrotic Pulp In Single Root Single Canal Teeth Were Included In This Study. After Confirming The Diagnosis Clinically And Radiographically, Access Cavity And Mechanical Preparation Using Were Accomplished In The Same Visit. Then Patients Were Randomly Assigned Into Two Equal Groups (calcium Hydroxide Group And Propolis Group), And Then The Access Cavity Was Sealed. Patients Were Instructed To Rate Their Pain Score At 24, 48, 72 Hours Then After 7 Days At The Day Of The Second Visit. After 7 Days The Intracanal Medicament Was Removed Then Root Canal Was Obturated.

Results: The Results Of This Study Showed That There Was No Statistically Significant Difference In Reduction Of Post-operative Pain Between Calcium Hydroxide Paste And Propolis Paste In Patient With Necrotic Pulp At 24 Hours, 72 Hours And 7 Days. However, There Was A Statistically Significant Difference In Reduction Of Post-operative Pain Between Two Groups At 48 Hours.

Conclusions: It Could Be Concluded That The Intracanal Use Of Calcium Hydroxide And Propolis Was Effective In Controlling Incidence And Intensity Of Post-operative Pain. The Intracanal Use Of Propolis Was Effective In Rapidly Controlling Post-operative Pain With No Side Effects.

Aisha Abubaker Ali Shanan, Mohammed Hossam Eldin El Mallahi And Shaimaa Eliwa Ghazy .,

ABSTRACT
Oral Cancer Is A Very Aggressive Malignant Tumor Which Is Considered The Sixth Most Common Malignancy Worldwide. Chemotherapy Still The Main Treatment For Malignancy To Improve The Survival Rate And Quality Of Life For Patients. 5-fluorouracil Considered As A Standard Chemotherapy Regimen In Cases Of Recurrent Or Metastatic Head And Neck Squamous Cell Carcinoma. However, The Resistance Of Malignant Cells To Chemotherapy Remains A Major Obstacle In Cancer Treatment. Recently, Exploring Natural Products With Anticancer Properties Become A Very Growing Area Of Study To Open The Gate For New Treatment Modalities. Eucalyptus Oil Consists Of Many Chemicals That Have Anticancer Effect, Especially Alpha-pinene And Beta-pinene. Many Other Chemicals Present In Eucalyptus Oil Are Still Under Study. Aims And
Objectives: The Objective Of The Present Study Was To Evaluate The Possible Cytotoxic Effect Of Eucalyptus Oil And 5-fluorouracil On Head And Neck Squamous Cell Carcinoma Cell Line And To Compare The Effect Of Eucalyptus Oil And 5-fluorouracil On The Expression Of The Apoptotic Marker (Caspase-3) In Head And Neck Squamous Cell Carcinoma Cell Line. Methods:Human Tongue Squamous Carcinoma Cell Line (SCC-15) Was Used In This Study.Different Concentrations Of 5-fluorouracil And Eucalyptus Oil Were Prepared And Applied For 24 And 48 Hours On The Used Cell Line. The Yellow Tetrazoliumsalt (MTT) Assay Was Used For Evaluation Of Cytotoxicity Ofeach5-fluorouracil And Eucalyptus Oil.The Quantitative Sandwich Immunoassay ELISA Technique Was Used For The Assessment Of Caspase-3 Expression In The Treated Cell Line.

Results: MTT Assay Revealed That 5-fluorouracil And Eucalyptus Oil Showed A Significant Cytotoxic Effecton SCC-15cell Line. The ELISA Assessment Of Caspase-3 Expression Revealed That There Was A Statistical Increase In Caspase-3 Expression In SCC-15cell Line Treated With5-fluorouracil Than Eucalyptus Oil. Conclusion: Both 5-FU And Eucalyptus Oil Are Cytotoxic To OSCC But 5-FU Is More Effective In Activation Of Apoptotic Pathways.

Al-Shaimaa Tarek Ismail, Geraldine M. Ahmed And Sherif El-khodary .,

ABSTRACT
The Aim Of The Present Study Was To Evaluate And Compare The Post-operative Pain After Single Visit And Multiple Visit Root Canal Treatment In Asymptomatic Necrotic Mandibular Molars Using OneShape Rotary Instrument After 6, 24, 48 Hours And 7 Days Using Modified Visual Analogue Scale (mVAS).

Materials and Methods: Forty Four Patients With Asymptomatic Non Vital Mandibular Molars Were Included In This Trial. After Confirming The Diagnosis Clinically And Radiographically, Patients Were Randomly Assigned Into Two Equal Groups Of 22 Patients Each. The Single Visit Endodontic Treatment Assigned To The Intervention Group, While Multiple Visit Endodontic Treatment Assigned To The Control Group. Standard Endodontic Treatment Was Performed For Both Groups Using Rotary OneShape Files For Shaping, 2.6% Sodium Hypochlorite For Irrigation And Single Cone Technique With Resin Sealer For Obturation. No Intracanal Medicament Was Used In The Multiple Visits Group.

Results: Results Showed That There Was No Significant Difference In Postoperative Pain (at 6, 24, 48 Hours And 7 Days) Between Single Visit And 1st Visit Of Multiple Visit Groups. But There Was A Significant Difference Between Single Visit And 2nd Visit Of Multiple Visits Group In Postoperative Pain At 6h, 24h And 48 Hours, And There Was No Significant Difference In Postoperative Pain After 7 Days. Conclusion: Within The Limitation Of The Present Study, It Can Be Concluded That: There Is No Statistical Difference In Postoperative Pain (at 6, 24, 48hours And 7 Days) Between Single Visit And 1st Visit Of Multiple Visit Groups. The Incidence And Intensity Of Postoperative Pain In Both Groups Gradually Reduced Over The Study Period. The Highest Prevalence Of Postoperative Pain Was Higher During 24 Hours In Single Visit Group And After 1st Visit In Multiple Visit Group. There Is A Significant Difference Between Single Visit And 2nd Visit Of Multiple Visit Group In Postoperative Pain At 6h, 24h Hours, And There Was No Significant Difference In Postoperative Pain After 48hours And 7 Days.

Shaimaa MS El Hanafy, Dalia M Moheb , Osama I El Shahawy And Ahmad M Abd Alsamad .,

ABSTRACT
Background: Dental Caries Is The Most Prevalent Disease Worldwide. It?s One Of The Greatest Challenges To The Integrity Of The Developing Tooth. Indirect Pulp Therapy Is Proposed As An Alternative To The Usual Care For Carious Lesion Management. However There Is No Sufficient Evidence That Supports That Technique And Best Capping Materials. Methods: Randomized, Clinical Trial To Evaluate The Clinical And Radiographic Success Of Indirect Pulp Capping. Using Two-step Antibacterial Bonding System Versus Conventional One. This Study Was Carried Out On Thirty Six Children. Divided In Two Groups; One Group Had ?One Step? Indirect Pulp Capping Using Antibacterial Bonding, Another One Had The Same Treatment But With Conventional Bonding. Clinical And Radiographic Follow Up Was Carried Out Immediate Postoperative, Two, And Nine Months.

Results: By Statistical Analysis It Was Found That Both Groups Were Comparable In Postoperative Pain (p=1.000). As Regards Secondary Outcomes, Clinically; There Was No Pain On Percussion, Swelling, Or Sinus Tract. Radiographically; There Wasn?t Any Adverse Radiographic Findings. Conclusion: The ?One Step? Indirect Pulp Capping Technique Has Promising Clinical And Radiographic Success Over 9 Months Follow Up. Perfect Seal Regardless Of Capping Material Is The Key Of Success In Case Of Indirect Pulp Capping.

Shaimaa Mostafa Omar, Mohamed Farag Ayad And Mohammed Sedikk Mohammed,

ABSTRACT
Statement Of Problem: Most Clinical Failures Of Endodontically Treated Teeth Restored With Dowels Are The Result Of Cementation Failure At The Resin / Dentin Interface. Purpose : This In-vitro Study Evaluates The Influence Of Reinforced Dental Adhesive On Push-out Bond Strength Of Glass Fiber Dowels. Materials And Method: Thirty Freshly Extracted Human Upper Central Incisors Were Selected. All Root Canals Were Instrumented, Obturated And The Dowel Space Was Prepared To Depth 9 Mm. The Specimens Were Classified Into Two Groups According To Cementation Technique Of The Dowels. Group I: Self-etch Adhesive Cement. Group II: Self-etch Adhesive Cement With Bond Incorporate With Hydroxyapatite Nanoparticles. Relyx? Ultimate Resin Cement Was Used For Dowels Cementation. From Each Specimen, 3 Dowel/dentin Sections Were Obtained, Each 1-mm Thick. Three Sites Along The Root Were Evaluated (cervical , Middle And Apical). Specimens Were Submitted To Push-out Bond Strength Test Using A Computer Controlled Materials Testing Machine With A Load Cell Of 5 KN And Loaded At A Crosshead Speed Of 0.5 Mm/min. Data Were Analyzed With One-way Analysis Of Variance (ANOVA) And Independent T-test (� =0.05).

Results: The Bond Strength Of Fiber Dowels Affected By Hydroxyapatite Nanoparticles Incorporation. It Was Found That Experimental Group Recorded Statistically High Significant Mean Value (10.3�2.5 MPa) Than Control Group (8.3 � 1.6 MPa) As Indicated By Independent T-test. Conclusion: Incorporation Of Hydroxyapatite Nanoparticles In Self-etch Adhesive System Increase Push Out Bond Strength Of Fiber Dowels In Comparison To Conventional Type.

Mohammed Mostafa Rehab, Reem Ahmed Lutfy And Shaimaa Gawdat,

ABSTRACT
The Aim Of This Study Was To Evaluate The Time Consumed And Total Removal Of Smart Paste Bio System Compared To AH-plus Sealer And Gutta-percha In Obturated Single Rooted Teeth By Using Hedstrom Files With Gates-Glidden Burs Compared To D-race Retreatment System.

Materials and Methods: Fifty Two Single-rooted Teeth Were Used In This Study. The Teeth Were Decoronated, Prepared Using The Protaper Rotary System And Obturated Using The Modified Single Cone Technique. The Samples Were Then Divided Into Two Main Groups (n=26) According To The Sealer Used In Obturation: Group I: AH-plus Sealer. Group II: Smart Paste Bio Sealer. Each Group Was Further Subdivided Into Two Subgroups (n=13) According To The Method Used In Removal Of Obturation Material: Subgroup 1: H-files And Gates-Glidden Drills. Subgroup 2: D-race Retreatment System.

Results: The Results Revealed That There Is No Significant Difference Between Smart Paste Bio Sealer And AH-plus Sealer Regarding Residual Debris. Regarding The Method Of Root Canal Filling Removal, D-race Retreatment System Showed Significantly Faster And Efficient In (GP/AH-plus) Obturation System Removal Than H-files And Gates Glidden And Slower But Efficient In (SPBio) Obturation System Removal Than H-files And Gates-Glidden.

Shaimaa Mostafa Omar, Mohamed Farag Ayad And Mohammed Sedikk Mohammed,

ABSTRACT
Statement Of Problem: Most Clinical Failures Of Endodontically Treated Teeth Restored With Dowels Are The Result Of Cementation Failure At The Resin / Dentin Interface. Purpose : This In-vitro Study Evaluates The Influence Of Reinforced Dental Adhesive On Push-out Bond Strength Of Glass Fiber Dowels. Materials And Method: Thirty Freshly Extracted Human Upper Central Incisors Were Selected. All Root Canals Were Instrumented, Obturated And The Dowel Space Was Prepared To Depth 9 Mm. The Specimens Were Classified Into Two Groups According To Cementation Technique Of The Dowels. Group I: Self-etch Adhesive Cement. Group II: Self-etch Adhesive Cement With Bond Incorporate With Hydroxyapatite Nanoparticles. Relyx? Ultimate Resin Cement Was Used For Dowels Cementation. From Each Specimen, 3 Dowel/dentin Sections Were Obtained, Each 1-mm Thick. Three Sites Along The Root Were Evaluated (cervical , Middle And Apical). Specimens Were Submitted To Push-out Bond Strength Test Using A Computer Controlled Materials Testing Machine With A Load Cell Of 5 KN And Loaded At A Crosshead Speed Of 0.5 Mm/min. Data Were Analyzed With One-way Analysis Of Variance (ANOVA) And Independent T-test (? =0.05).

Results: The Bond Strength Of Fiber Dowels Affected By Hydroxyapatite Nanoparticles Incorporation. It Was Found That Experimental Group Recorded Statistically High Significant Mean Value (10.3?2.5 MPa) Than Control Group (8.3 ? 1.6 MPa) As Indicated By Independent T-test. Conclusion: Incorporation Of Hydroxyapatite Nanoparticles In Self-etch Adhesive System Increase Push Out Bond Strength Of Fiber Dowels In Comparison To Conventional Type.