Azhar Abdulrahman Al-Wesabi, Fatma Abdelgawad And Kamal El Motayam,

ABSTRACT


Aim: The Aim Of This Study Was To Evaluate The Gender Differences In Oral Health Attitude Of The Students Studying Dentistry In An Egyptian Private University Using Hiroshima University-Dental Behavioral Inventory (HU-DBI). Method: English Version Of Hiroshima University Dental Behavior Questionnaire Was Self-administrated By 783 Undergraduate Dental Students At Private University And Responses Were Collected. The Statistical Analysis Was Performed Using The Software SPSS Version 20. The Individual Scores Were Summed Up To Yield A Total Score. Descriptive Statistics Was Calculated And Mean Scores, Standard Deviation And Frequency Distribution Were Obtained.

Results: There Was No Statistical Significant Difference Between Both The Academic Years And Gender With A P-value=0.63264. There Was A Statistical Significant Difference In Attitude Between Males And Females(P=0.00040). While, No Statistical Significant Difference In Both Behavior And Knowledge Of Males And Females In All Levels (p=0.05188, P=0.85582 Respectively). The Present Study Showed That Males Had More Positive Oral Health Attitude Than Females And There Were No Differences Between Males And Females In Oral Health Behavior And Knowledge.

Abdullah A. Abonema, Ihab E. Mosleh And Hanaa H. Zaghloul,

ABSTRACT
Statement Of Problem: Surface Finishing And Polishing Techniques Have A Mechanical Impact On Ceramic - Polymer Surfaces That Can Eventually Affect The Surface Roughness And Color. Expected Changes, After Being Subjected To Aging Procedures, Necessitates Adopting A Finishing And Polishing Protocol To Enhance Their Impaired Optical Properties. The Purpose Of This In Vitro Study Was To Assess The Effect Of Two Different Polishing Techniques On The Surface Roughness And Color Stability Of Two CAD/CAM Ceramic-polymer Materials Compared To CAD/CAM Glass Ceramic Material Before And After Being Subjected To Chemical And Mechanical Aging Procedures.

Materials and Methods: Fourty-two Discs Were Constructed From CADCAM Esthetic Blocks. Lithium Disilicate CAD/CAM Glass Ceramics As Control (n=14), Ceramic-polymer Hybrid Materials, Lava Ultimate (n=14) And Vita Enamic (n=14) Were Studied. Discs In Each Group Were Divided Into Equal Subgroups (n=7) According To The Polishing Technique Employed. One Subgroup Was Polished Following The Manufacturer?s Recommendations (mnf) And The Other Was Polished By Brush And Paste Protocol(B/P). Mechanical And Chemical Aging Procedures Were Performed For Each Subgroup. The Surface Roughness And Color Of Each Specimen Were Measured Before And After All Interventions And Aging Procedures. Surface Topography (Ra) Was Evaluated Using Contact Stylus Profilometer And The Average Ra Values (?m) Were Calculated. Laboratory UV Spectrophotometer Was Used To Measure Color Parameters (a*,b*,L*). Color Differences (??) And Surface Roughness (Ra) Data Were Analysed Using Two-way (ANOVA).

Results: There Was No Significant Difference In Surface Roughness Values Between The Two Techniques After Polishing. After Mechanical Aging, (mnf) Technique Showed Significantly Higher Surface Roughness Than (B/P) Except For Vita Enamic. After Chemical Aging, The Two Polishing Techniques Showed No Significant Difference In Mean Color Change (?E) Values With All Ceramic Types. Conclusion: The Brush/paste Polishing Protocol Produced Comparable Surface Smoothness To The Manufacturer?s Protocol For Glass And Polymer Ceramics. Color Change Is Material Compositional Microstructure Dependent.

Gehan Abdel Naser Abdel Rahman, Samia Mostafa El-Azab, Amr Helmy El Bolok , Sherif Farouk El-Gayar And Aly Fahmy Mohamed,

ABSTRACT
Background: Sinapic Acid Is One Of The Phenolic Acids That Widely Distributed In Edible Plants Such As Cereals, Nuts, Oil Seeds And Berries. Sinapic Acid Shows Antioxidant, Antimicrobial, Anti-inflammatory, Anticancer, And Anxiolytic Activity.

Materials and Methods: The Present Study Was Conducted Based On Monitoring Of In Vitro Cytotoxicity Using MTT Assay, Morphological Changes Determination Of Free And Nano-capsulated Sinapic Acid Using Histopathological Examination And Image Morphometric Analysis. Nano-capsulation Was Performed Using Tween-80, And Biochemical Changes Concerning Reactive Oxygen Species (ROS) Profile.

Results: Data Recorded Revealed That The Inhibitory Concentration (IC50) Of Free And Nano-capsulated Sinapic Acid Was 646.4 ?M/ml And 84.74 �M/ Ml Post Treatment Respectively. Also, Cytotoxicity Was Concentration Dependent With Significant Difference Between Free And Nano-capsulated One (P<0.05). Also, ROS As A Biomarker Was Elevated In A Significant Way Than In Case Of Nano-capsulated Sinapic Acid. Cytotoxicity Accompanied With Morphological Changes Denoting Apoptosis, Necrosis And Secondary Necrosis After Treatment With Free And Nano-capsulated Sinapic Acid. In The Meantime The Biochemical Marker (ROS) Was Changed Post Cell Treatment With Both Formulae Of Sinapic Acid. Conclusion: Nano-capsulated Sinapic Acid Is More Effective As Cancer Chemopreventive Agent With Much Lower Concentration Than Free Sinapic Acid On Squamous Cell Carcinoma Cell Line.

Mona Sabah Farag El-Masry, Emad Tawfik Daif And Gamal M. Moutamed,

ABSTRACT


Aim: The Aim Of This Study Was To Assess The Effects Of Local Platelet Rich Plasma (PRP) Delivery On Mandibular Fracture Healing.

Materials and Methods: Patients Were Divided Into Two Equal Groups, 10 Patients Each. Under General Anesthesia, Mandibular Fractures Of Patients In Study Group (A) Were Treated By Open Reduction And Internal Fixation Using The Conventional Miniplate System With Local Application Of Activated PRP Along The Fracture Line. While Mandibular Fractures Of Patients In The Control Group (B) Were Treated By The Same Surgical Approach Of Open Reduction And Internal Fixation Using A Conventional Miniplate System Without Local Application Of PRP. Then Post-operative Digital Panoramic Radiographs Were Made For Each Patient At Four Postoperative Intervals; One Week And One, Three, And 6 Months Postoperative.

Results: Clinical Assessment After Surgery Showed That Oral Mucosa Healed Faster In Patients Of Study Group Than Those Of The Control Group Because Of The Stimulatory Effect Of Platelet-derived Growth Factors On Repair Of The Soft-tissue Wounds. The Changes In Optical Density Measurements On The Digitized Panoramic Views Were Recorded Using Digora Software And Then Analyzed. There Was No Statistically Significant Difference Between Bone Density Measurements Of The Two Groups At Each Interval. However, There Was A Statistically Significant Increase In Mean Bone Density Measurements At One Week And 1, 3 And 6 Months Post-operative In Both Study And Control Groups.

Yasmin Mohamed Yousry, Amr Ezzat Abd EL- Latif And Randa Youssef Abd El-Gawad,

ABSTRACT


Aim: The Aim Of The Study Was To Evaluate Success Rate Of Pulpotomy In Both Primary First And Second Molar After Using Antioxidant Versus Formocresol (FC) Study Design: The Sample Size Includes 26 Primary First And 26 Primary Second Molars Divided Randomly Into Two Groups (26 In Each Group). Teeth Were Treated By Conventional Pulpotomy Technique Then After Stasis Of Bleeding, Either Antioxidant Was Placed Over The Orifice Or FC Was Placed 3-5 Minutes Then Removed, Then A Layer Of Reinforced ZOE Was Placed And The Tooth Was Covered With Stainless Steel Crown. Clinical And Radiographic Outcomes Were Assessed After 3 And 6 Months.

Results: At 6 Months The Incidence Of Clinical And Radiographic Success In Primary First And Second Molars In Both Antioxidant And FC Revealed A Non-significant Difference. Conclusion : The Clinical And Radiographic Success In Pulpotomy Is Not Affected By The Type Of Treated Tooth .

Rania Khedr Ahmed, Amany Mohammed Korsel And Waleed Elshahawy,

ABSTRACT


Purpose: The Aim Is To Evaluate The Effect Of Zirconia And Porcelain Fused To Metal Crowns On DNA Of Dog?s Gingival Fibroblast (casepase Gene) Using Polymeraise Chain Reaction (PCR) Test.

Materials and Methods: Fifteen Adult Dogs Were Selected. Five Of Them Were Used As Control. Lower Left Canines Of Remaining Dogs Were Prepared To Receive Porcelain Fused To Metal (PFM) And Zirconia Crown. After Three Months From Insertion Of The Crowns, Samples Of Gingiva Were Taken From All The Dogs And Polymerase Reaction (PCR) Test Was Performed On Casepase Gene And The Process Was Repeated After Six Months. The Data Collected From PCR Were Statistically Analyzed Using Independent-samples T Test.

Results: After Three Month, The Mean Of Casepase Gene In Dogs Had Porcelain Fused To Metal Crowns PFM Was (0.92�0.54) And In Dogs Had Zirconia Crowns Is (0.62�0.41) And After Six Months, The Mean Of Casepase Gene In The Dogs Had PFM Crowns Was (0.93�0.42) And In The Dogs Had Zirconia Crowns Is (0.66�0.48). There Is Positive Correlation Between Three And Six Months In Porcelain Fused To Metal (r=0.98). There Was Also Positive Correlation Between Three And Six Months In Zirconia(r=0.99). Casepase Gene Decrease In Porcelain Fused To Metal By 7.2% And In Zirconia By33.8% After Six Months. Conclusion: Within The Limitations Of This Study, Casepase Gene Decrease In Case Of Zirconia More Than PFM Restoration. The Reduction In The Rate Of Gene Means That Apoptosis Occurred In Both Material But It Occurred In PFM More Than Zirconia Restorations So Zirconia Is More Biologically Accepted Than PFM.

Ahmed I. Abdul-Aziz And Wael M. Refai,

ABSTRACT
Objective: To Three-dimensionally Compare The Skeletal And Dental Effects Produced By Micro-osteoperforation Assisted Rapid Maxillary Expansion (MOPARME) And Conventional Rapid Maxillary Expansion (RME) Using Cone Beam Computed Tomography (CBCT).

Materials and Methods: A Sample Of 14 Patients With Posterior Crossbite From The Outpatient Clinic Of The Department Of Orthodontics, Faculty Of Dentistry, Minia University, Egypt, Was Divided Into Two Groups According To The Type Of Expansion: MOPARME (n = 7, 4 Males And 3 Females, Mean Age= 16.0 � 0.6 Years) And RME (n = 7, 5 Males And 2 Females, Mean Age= 15.9 � 0.5 Years). CBCT Scans Were Taken Before Expansion (T1) And 3 Months After Expansion (T2). Transverse Skeletal Expansion, Transverse Dental Expansion, And Buccopalatal Teeth Inclination In Relation To The Maxillary Plane Were Evaluated At The Level Of Maxillary Premolars And First Molars.

Results: A Statistically Significant Increase In The Facial, Nasal And Maxillary Widths Was Found In Both Groups. MOPARME Showed A Significant Increase In The Apical Width At The Level Of The Maxillary First Molar And Coronal Widths At The Level Of The First And Second Maxillary Premolars, While RME Group Showed No Significant Increase Regarding All Dentolinear Measurements. Although The MOPARME Showed A Statistically Significant Decrease Only For The External Buccopalatal Inclination Angle Of The Right And Left Maxillary Second Premolars, RME Demonstrated Non-significant Decrease Regarding All Dentoangular Measurements. Between Groups Comparison Showed A Non-significant Difference Regarding All Measurements Except For The Facial Width.

Conclusions: Both Treatment Modalities Are Effective In Treating Posterior Crossbite. Although Conventional RME Produced More Skeletal Transverse Expansion Than Did MOPARME, There Was No Significant Difference Between The Two Groups Except For The Facial Width. MOPARME Produced More Dental Transverse Expansion, But No Significant Difference Was Found Between The Two Groups.

Salsabeel M.N. Abd El-Hafez, Magdy M. Ali , Amr H El-Bolok And Dalia A. Moukarab,

ABSTRACT
Background: Cyclophosphamide (CP) Is An Anticancer Agent Treats Many Cancer Types Effectively, But Has Many Side Effects. Unfortunately It Doesn?t Work Only On The Active Cells (cancer Cells) But Also Acts On The Healthy Cells. Royal Jelly (RJ) Is A Natural Substance Which Reported To Have Many Therapeutic Effects Besides Being An Anti-oxidant, Anti-inflammatory And Improve Immune System And Is Suggested To Have Protective Ability Against CP Unfortunate Side Effects. Objective: The Aim Of This Study Is To Evaluate The Protective Effect Of Royal Jelly Against The Destructive Effect Of Cyclophosphamide On Dental Pulp In Experimental Animal Model Via Biochemical, Histopathological And Immunohistochemical Examination.

Materials and Methods: Twenty Four Male, Adult, Albino Wister Rats, Were Randomly Separated In To 4 Groups Of 6 Rats; Control Group, RJ Group, CP Group And RJ / CP Group. Blood Samples Were Collected From Each Rat For Biochemical Examination. The Mandibles Of Rats Were Dissected And Fixed In 10 % Formaldehyde Solution And Transfer To The Laboratory To Be Processed For Histological And Immunohistochemical Examination. The Data Were Statistically Analyzed.

Results: CP Group Showed Marked Biochemical, Immunohistochemical, And Histopathological Changes When Compared With The (C, RJ, CP/RJ) Groups Indicating Destructive Effect Of CP Administration. Concomitant Administration Of RJ With CP Revealed A Noticeable Amelioration Of All Biochemical And Histological Changes Indicating The Protective Effect Of RJ. Conclusion: Royal Jelly Provided Protection From Toxicity Of CP In Dental Pulp Tissue. It Could Be Used As Additive Treatment With Chemotherapy.

Hesham A. Hegazy, Said M. Abd Allah And Attiah A. El-Gendy,

ABSTRACT
Objective: The Aim Of The Study Is To Compare Strain Distribution In Peri-implant Region Using Different Implant Platform Switching (an In-vitro Study).

Materials and Methods: Thirty Implant Fixtures Of The Same Diameters (6mm) And Lengths (10 Mm) And Thirty Abutments Of Different Diameters (6, 4.5, 3.5 Mm) Were Used And Connected To Each Other To Make Three Study Groups, Group (A) Ten Samples Of Matched Platform Implants With Abutment Diameter 6 Mm, Group (B) Ten Samples Of Platform Switching Implants With Abutment Diameter 4.5 Mm And Group (C) Ten Samples Of Platform Switching Implants With Abutment Diameter 3.5 Mm. All Samples Were Embedded In Epoxy Resin Blocks. Ascending Axial And Non-axial Loads From 0-200 N Were Applied To The Implants While Strain Gauges Were Connected To The Strain Meter To Record The Microstrains.

Results: In Group (A) The Microstrain Values Were The Highest Values While In The Other Two Groups (B) And (C) The Microstrain Values Were Decreasing With Increasing The Platform Switching Either Under Axial Or Non-axial Type Of Loading. Conclusion: Dental Implants With Platform Switched Implant-abutment Connection Transmit Less Stresses To Peri-implant Region Compared With Regular One Which Means More Bone Preservation Around Dental Implants And Increasing The Platform Switching Leads To Decreasing The Stresses Transmitted To The Surrounding Structures.

Huda Mohammed Metwally Osman, Ahmed Gamal Ahmed Hassan Mohammed Sayed M. Hassan And Emad Mohammed Tolba Agamy,

ABSTRACT
Background: Surface Roughness Of The Denture Plays A Major Role In The Adhesion Of Microorganisms, It Is Affected Primarily By The Finishing And Polishing Techniques. The Aim Of This Study Was To Evaluate The Effect Of Two Finishing And Two Polishing Techniques On The Surface Roughness Of Thermoformed And Heat Activated Acrylic Resin Denture Base Materials And Their Effect On Candida Albicans Attachment. Materials And Method: 80 Samples (64?10?2.5mm) Were Prepared (40 Heat Activated Acrylic ?material A? And 40 Thermoformed Denture Base Materials ?material B?). The Samples Of Each Material Were Divided Into Two Main Groups According To The Finishing Method Group 1 And 2. Group 1 Finished By Tungsten Carbide Bur, White AL2O3, Green Carborandum Stone And Sand Paper Of Grit Size More Than 120. Group 2 Finished By Tungsten Carbide Cutter And Acrylic Polisher (coarse Green, Medium Grey, Fine Red). Each Group Was Divided Into Two Subgroups According To The Polishing Method. Each Subgroup Contained 10 Samples, Subgroups (a) For Both Materials Were Polished By Fine Pumice With Wet Rag Wheel And 1500 Rpm Motor Speed For 2 Minutes. While Sub Groups B For Both Materials Were Polished By Abraso Star Glaze Paste, Brown Tripoli Compound And Leather Buff. The Mean Surface Roughness Values (Ra) Were Gained For Each Sample Before And After Finish And Polish. The Samples (before And After Finish And Polish) Were Incubated In Media Containing Suspension Of Candida Albicans Cell (conc. Of 1.5*106cell/ml) For 24h At 370C.

Results: Heat Activated Acrylic Samples That Were Finished By Technique 2 And Polished By Technique (b) Recorded Lower Roughness Mean Value Than Thermoformed Acrylic, However These Differences Are Statistically Non-significant (P>0.05) As Indicated By Unpaired T-test. Conclusion: Using Techniques Of Finishing And Polishing (recommended For Thermoformed Acrylic) For Thermoformed And Heat Activated Acrylic Resin Will Yield Smoother Surface More Than Using Finishing And Polishing Techniques (recommended For Heat Activated Acrylic Resin). This Method Has Less Candidal Attachment For Both Materials.