Mohammed A. Eissa, Hussein I. Saudi And Shereen A. Ali,

ABSTRACT


Aim: To Evaluate Bovine Tutobone In The Treatment Of Periodontal Infrabony Pockets.Patients And Methods: Twenty Infrabony Defects In Patients With Chronic Periodontitis Who Had Received Initial Periodontal Therapy And Had Intrabony Defects Of ? 3 Mm In Depth Were Enrolled. Randomly, Using The Sealed Envelope Technique, Half Of Defects Were Treated With Open Flapdebridement Only And The Others Were Treated With Bovine Tutobone Microchips After Debridement Of Defects. Clinical Parameters Were Evaluated At Baseline, 3 And 6 Months Postoperatively. Cone Beam Computed Tomographs Were Taken At Baseline And 6 Months Post Therapy.

Results: Both Groups Showed Significantimprovement In All Clinical And Radiographic Parameters 3 And 6 Months After Treatment When Compared To Baseline. There Were No Statistically Significantdifferences Between Both Groups In The Mean Difference Of Probing Pocket Depth, Bleeding On Probing And Mobility 3 And 6 Months After Treatment. The Mean Difference Of Clinical Attachment Level Showed Statistically Significantdifference After 6 Months. Radiographic Results Showed Statistically Significantdifferences Between Both Groups In The Mean Difference Of Intrabony Defect Depth And Bone Density Within The Pocket.Conclusion: Both Treatment Modalities Gained Sufficientimprovement In The Treatment Of Infrabony Defects, However The Use Of Bovine Tutobone Seemed To Be More Effective.

Mostafa A. Mohammed, Kareem M. Gaber And Wael M. Refai,

ABSTRACT
Objective: To Compare The Effect Of Wraparound Retainer And Different Thickness Of Vacuum Formed Retainer (Essix Retainer) On Little?s Irregularity Index During Retention Periods.

Materials and Methods: Forty Patients Of Both Sexes Varying Ages From 12 To 35 Years Were Selected And Randomly Assigned Into Four Equal Groups, Group 1 Wraparound Group (control Group), Group 2 (1 Mm Thickness Essix Retainer), Group 3 (1.5 Mm Thickness Essix Retainer) And Group 4 (2 Mm Thickness Essix Retainer). After Finishin Fixe Orthodontic Treatment And Patients Had Class I Molar And Canine Relationship, Debonding Was Carried Out. Impressions Were Taken After Debonding, 2 For Retainer Fabrication And 1 For Mandibular Irregularity Index Analysis. Patients Asked To Wear The Retainer 24 Hours For 6 Months Except In Eating And 12 Hours For Another 6 Months. All Casts Were Numbered To Avoid Bias And Scanned By Smart Optics 3D Scanner For Getting STL File. Little?s Irregularity Index Was Measured Using 3 Shape Software. The Measurements Were Repeated At T0 (after Debonding), T1 (after 6 Months) And T2 (after 12 Months).

Results: No Significanc Difference Between Essix Groups In Mandibular Irregularity Index. Concerning Wraparound Group, A Significanc Differences Were Found Between T0 And T2. Conclusion: Essix Retainer Is More Effective In Retaining Lower Incisors Alignment Than Wraparound Retainer.

Fatma Abd El Nasser Abd El Rehim Abouel Maaty, Samah Sayed Mehanni And Zeinab Amin Salem,

ABSTRACT
Background: Tongue Cancer Is A Serious Life Threatening Type Of Oral Cancer. Egyptian Propolis Has Many Biological Activities As Cancer Inhibitory Activity Owed To Its Content Of Phenolic Compounds And Esters.Objective: The Present Study Aims To Monitor The Anticancer Effect Of The Egyptian Propolis Methanolic Extract Through Ultrastructural Study, COMET Assay, MTT Assay, MiRNA Expression And Morphological Changes By Inverted Microscopy.

Materials and Methods: Tongue Carcinoma Cells Grow Without Any Intervention As Group I. Propolis Extract Was Prepared From Crude Egyptian Propolis And Applied On Human Tongue Cancer Cells As Group II. Phytochemical Analysis Was Made For The Propolis Extract. Anticancer Efficacyof Group II Was Investigated By The Mentioned Techniques.

Results: Significantcytotoxic Effect, Ultrastructural And Morphological Apoptotic Changes In Cancer Cells Were Detected In Group II. At 24 And 48 Hrs Time Interval MTT Assay Showed A Significantdrop In Cell Viability From Group I To Group II, COMET Assay Showed An Increase In % Of Apoptosis From Group I To Group II And Both MiRNA 21 And MiRNA 195 Were Dropped Significantlyin Group II.Conclusion: This Study Shows That Egyptian Propolis Methanolic Extract Proved To Have Apoptotic Effect On Tongue Carcinoma Cells.

Omaima S.A. Tawfik, Cherif A. Mohsen And Shams W. Amgad,

ABSTRACT
Objective: The Aim Of This Study Is To Compare Microleakage And Marginal Adaptation Of Three Ceramic Types (zirconium Ceramics, Lithium Disilicate And Hybrid Ceramics) Of Two Designs Of Inlay-Retained Fixed Partial Dentures (IRFPDs) .Methods: Sixty Inlay Retained Fixedpartial Dentures Were Constructed, Samples Were Divided Into Two Groups According To Type Of Inlay Preparation Design, Group B (no=30 Inlay Retained Fixedpartial Dentures) Was Designed In Box-shape Design, Group S (no=30 Inlay Retained Fixedpartial Dentures) Was Designed In Slice Shape Design. Further, Each Group Was Subdivided Into Three Subgroups According To Ceramic Material Used Into, Group Z (no=10 Inlay-retained Fixedpartial Dentures) Fabricated From Zirconia Ceramic (Katana STML Zirconia), Group L (no=10 Inlay-retained Fixedpartial Dentures) Fabricated From Lithium Disilicate Ceramic (IPS E.max CAD), And Group B (no=10 Inlay-retained Fixedpartial Dentures) Fabricated From Bio-HPP Material (bre-CAM. BioHPP) , At The End Each 5 Samples From Each Subgroup Were Tested For Marginal Adaptation Microscopically On Each Sample Using A Computer-aided Stereomicroscope At 45x Magnification,and The Other 5 Samples Were Tested For Microleakage By The Solution Of 2% Methylene Blue Dye.

Results: For The Microleakage Test; According To The Different Materials Types The Results Showed That E-max Recorded The Highest Mean Value Of At 34.4 ?m Followed By Zirconia At 30.2 ?m, While The Lowest Was Peek At 22.1 ?m. Regarding The Preparation Designs The Results Showed That The Highest Mean Value Was For E-max At Slice Shaped Design At 34.4 ?m Followed By E-max At Box Shaped Design At 31.0 ?m While The Lowest Was Zirconia At Box Shaped Design At Zero (No Leakage). For The Marginal Adaptation Test; According To The Different Materials Types The Results Showed That The Highest Mean Value Was For Peek After Thermocycling At 68.5 ?m Followed By E-max After Thermocycling At 63.8 ?m While The Lowest Was For Peek Before Thermocycling At 34.3?m. Regarding The Preparation Designs They Showed That The Highest Mean Value Was Recorded With The Slice Shaped Design Of Peek After Thermocycling At 80.8 ?m Followed By Box-shaped Design Bio-HPP After Thermocycling 73?m While The Lowest Was Box Shaped Design Of Peek Before Thermocycling At 22.5?m. Conclusion: Microleakage And Marginal Adaptation Of Inlay Retained Fixedpartial Dentures Were Affected By The Material Type And Preparation Design. Marginal Adaptation Of The Inlay Retained FPDs Was Affected By The Material Type That IPS E-max Showed The Highest Marginal Gap Followed By Bio-HPP Then Zirconia. Thermocycline Significantly Afect Both Marginal Adaptation And Microleakage.Clinical Recommendation: Further Investigations Should Be Done For Microleakage And Marginal Adaptation Of Inlay Retained Fixed Bridge

Doha H. Hendawy, Cherif A. Mohsen And Shams W. Amgad,

ABSTRACT
Statement Of The Problem: Restorative Dentistry Has Become An Essential Part In The Modern Clinical Practice. One Of The Conservative Clinical Options Is The Inlay Retained Fixedpartial Denture (IRFPD) But From The Other Hand, It Has A Higher Risk Of Fracture Due To The Minimal Invasive Preparation And Also Debonding.

Purpose: To Compare The Fracture Resistance And Internal Adaptation Of Three Types Of Materials (zirconia Ceramic, Lithium Disilicate And Ceramic Reinforced Polyetheretherketone) Of Two Designs Of Inlay-Retained Fixed Partial Dentures (IRFPDs).Methods:. Sixty Inlay Retained Fixedpartial Dentures Were Constructed, Each Model Including Extracted Mandibular Firstpremolar And Firstmolar Which Were Embedded In A Plastic Cast And Then An Impression Was Taken To Form Epoxy Resin Dies To Receive The Different Preparation Designs. Samples Were Divided Into Two Groups According To Type Of Inlay Preparation Design, Group B (no=30 Inlay Retained Fixedpartial Dentures) Was Designed In Box-shape Design, Group S (no=30 Inlay Retained Fixedpartial Dentures) Was Designed In Slice Shape Design. Then, Each Group Will Be Subdivided Into Three Subgroups According To Ceramic Material Used Into, Group Z (no=10 Inlay-retained Fixedpartial Dentures) Fabricated From Zirconia Ceramic (Katana STML Zirconia), Group L (no=10 Inlay-retained Fixedpartial Dentures) Fabricated From Lithium Disilicate Ceramic (IPS E.max CAD), And Group B (no=10 Inlay-retained Fixedpartial Dentures) Fabricated From Ceramic Reinforced PEEK (bre-CAM. BioHPP). Samples Were Thermocycled. Five Samples From Each Subgroup Were Tested For Internal Adaptation Using USB Digital Microscopy With Bult In Camera, While The Other 5 Samples Were Tested Using The Universal Testing Machine To Measure Fracture Resistance.

Results: For The Internal Adaptation, Regarding The Material Type. The Results Showed A Statistically Significantdifference As The Highest Mean Values Were Recorded For E-max IRFPDs, Followed By Zirconia IRFPDs, While The Lowest Mean Values Were Recorded For Bio-HPP IRFPDs. Regarding The Preparation Design, For Both E-max And Bio-HPP IRFPDs The Highest Mean Values Were Recorded For The Slice-shaped Design Followed By The Box-shaped Design, While For Zirconia IRFPDs, Results Showed Non-significantdifference Between Tested Designs. For The Fracture Resistance Test The Highest Mean Value Was Recorded For Zirconia (2427.8?m ? 163.1 ?m), Followed By Bio-Hpp (2067.9?m ? 219.1 ?m), While The Lowest Value Was Recorded For The E.max (1239.2?m?74.7?m).Conclusion: Internal Adaptation Of The Inlay Retained Fixedpartial Dentures Is Affected By The Material Type And Preparation Design, While The Fracture Resistance Is Affected By The Material Type. Zirconia Ceramics Have The Properties To Be The Most Appropriate Material To Be Used In Construction Of Conservative Inlay Retained Bridges. Lithium Disilicate IRFPDs Show Fracture Strength Above The Clinically Expected Loading Forces And Which Seems To Be Promising To Be Used As Alternative To The Traditional More Invasive Restorations. Bio-HPP Has A Good Internal Fitand Fracture Resistance To Be Used In The Dental Applications. Clinical Recommendation: Further Investigations Need To Be Demonstrated For Internal Adaptation Of Inlay Retained Fixed Bridge

Mohamed Ibrahem Mohamed And Hamed Mohamed Gad,

ABSTRACT


Introduction: Orthognathic Surgery Is The Art And Science Of Diagnosis, Treatment Planning And Execution Of Treatment By Combining Orthodontic And Oral &maxillofacial Surgery To Correct Musclo-skeletal Dento-osseous And Soft Tissue Deformities Of The Jaws And Associated Structures.To Achieve This Goal Different Techniques May Be Used According To The Treatment Plan Previously Prepared By The Orthognathic Team Work Like Le-forte I Osteotomy In Maxillary Correction & Bilateral Sagittal Split Osteotomy (BSSO) For Mandibular Correction. These Osteotomies Can Be Performed With Different Methods Like Lindman Bur , Surgical Saw Or Pezoelectric Device.Surgical Saw Is The Most Common And Widely Used Tool For Maxillary Osteotomy As It Has High Cutting Efficiencyand Continuous Clean Cut But It May Harm Soft Tissue And High Heat Generation Production Cause Marginal Bone Necrosis Which Affect Bone Healing. We Are Going To Evaluate A New Technique For Osteotomy Aiming More Valuable And Safety Measures In The Piezoelectric DeviceMethodology 10 Patients Were Recruted For Maxillary Orthognathic Surgery While Osteotomy Is Performed With Piezo In Right Maxilla And Saw Is Used For The Left Side. The Blood Loss For Each Osteotomy Side Was Calculated Separately And Compared.Results Saw Technique Showed Significantincrease In Blood Loss By 66.6% As Compared To Piezo Technique. Conclusion: The Use Of Piezoelectric Device In Maxillary Osteotomy Is More Safe Than Surgical Saw Cause Less Blood Loss As It Is Less Traumatic To Soft Tissue And Other Vital Structures .