RADIOGRAPHIC ASSESSMENT OF GLASS IONOMER RESTORATIONS WITH AND WITHOUT PRIOR APPLICATION OF NANO SILVER FLUORIDE IN OCCLUSAL CARIOUS MOLARS TREATED WITH PARTIAL CARIES REMOVAL TECHNIQUE: A RANDOMIZED CLINICAL TRIAL

Rahma A Abuhashema, Mai M Akah**, Noha S Abu-Taleb And Omayma M Safwat,

BSTRACT Objective: The Purpose Of This Clinical Trial Was To Assess The Effect Of Glass Ionomer Restoration With And Without Application Of Nano Silver Fluoride (NSF) Solution On The Remaining Carious Dentin Remineralization And Tertiary Dentin Formation After Partial Caries Removal In Occlusal Carious Molars. Methods: This Was A Split Mouth Study That Included Twenty-two Patients Having Two Contralateral Deep Occlusal Carious Molars. A Total Of 44 Cavities Were Prepared With Partial Caries Excavation Technique. For Each Patient, The Cavity At One Side Was Treated With 0.2 Ml Of NSF Solution Prior To Glass Ionomer Restoration With Glass Hybrid System; This Comprised The Study Group. For The Other Side, Glass Hybrid Was Directly Applied Into The Cavity; This Comprised The Control Group. Standardized Digital Periapical Radiographs Were Performed At Baseline And After 6 Months. The Carious Dentin Density And The Remaining Dentin Thickness Were Assessed.

Results: 16 Out Of The 22 Included Patients Completed The Study. Statistically Significant Increase In Both The Dentin Density And The Remaining Dentin Thickness Were Found In Both Groups After 6 Months. The Percentage Change In The Density After 6 Months Was Significantly Higher For The Study Group. However, No Statistically Significant Difference Was Found Between Both Groups In The Thickness Of The Tertiary Dentin Formed. One Case Of Clinical Failure In Each Group Was Observed.

Conclusions: Partial Caries Removal For Deep Carious Lesions And Glass Hybrid Restoration With And Without Prior Application Of NSF Proved Remineralization Of The Remaining Carious Dentin, And Tertiary Dentin Formation. Carious Dentin Remineralization Was Better Using NSF Which Indicates Its Promising Role In Caries Arrest.

Read More »

FRACTURE RESISTANCE AND MODE OF FAILURE OF CAD/CAM MILLED PEEK CORE VENEERED BY HIPC COMPARED TO ZIRCONIA CORE VENEERED BY CAD-ON LITHIUM DISILICATE ?IN-VITRO STUDY?

Nada Farid Shehab, Reham ElBasty And Hesham Katamish ,

ABSTRACT
Statement Of Problem: Veneered Zirconia Restorations Exhibit Very High Modulus Of Elasticity And High Incidence Of Veneer Chipping. Therefore, The Continuous Search For High Strength Esthetic Restorations Is Never Ending.

Purpose: To Evaluate The Fracture Resistance And Mode Of Failure Of Of CAD/CAM Milled PEEK Core Veneered By Milled High Impact Polymer Composite Compared To CAD-On Zirconia Core Veneered By Lithium Disilicate.

Materials and Methods: Fourteen Freshly Extracted Molars Were Mounted In Epoxy Blocks And Uniformly Prepared With A 1.0 Mm Circular Deep Chamfer Finish Line. They Were Divided In To Two Groups According To The Type Of Material (n=7): Group A: Teeth Restored By ZirCAD Core Veneered By E.max-CAD And Group B: Teeth Restored By PEEK BioHPP Core Veneered By HIPC. All Crowns Were Adhesively Cemented. They Were Then Subjected To Thermo-mechanical Aging Using A Chewing Simulator Then Static Compressive Loading Till Failure Using A Universal Testing Machine And Failure Types Were Determined.

Results: PEEK Group Recorded Statistically Non-significant (p>0.05) Higher Fracture Resistance Mean Value (2851.1?241.02 N) Than Zirconia Group (2786?240 N) As Indicated By Unpaired T-test. The Mode Of Fracture In Zirconia Group Was Manifested As Veneer Chipping In Almost All Of The Specimens. All PEEK Specimens Showed Cohesive Failure In Both Core And Veneer Layers Upon Failure.

Conclusions: Within The Limitations Of This Study, It Can Be Concluded That PEEK Veneered By HIPC Can Be Considered A Potential Permanent Crown And Bridge Material With Comparable Results To Veneered Zirconia Restorations.

Read More »

VERTICAL MARGINAL GAP DISTANCE OF CAD/CAM MILLED BIOHPP PEEK COPING VENEERED BY HIPC COMPARED TO ZIRCONIA COPING VENEERED BY CAD-ON LITHIUM DISILICATE ?IN-VITRO STUDY?

Michael Emad*, Carl Hany ** And Hesham Katamish***,

ABSTRACT
Statement Of Problem: Marginal Inaccuracy Causes A Space Between Restoration And Prepared Tooth, Which Accelerates Cement Dissolution, Leading To Secondary Caries, Pulpal Lesions, Postoperative Sensitivity, Periodontal Disease And Marginal Discoloration. Marginal Gap Should Be Less Than 120?m. Aim Of This Study Is To Evaluate Vertical Marginal Gap Of PEEK (Bio-HPP) Veneered With CAD/CAM Composite Veneer (HIPC) As Compared To Zirconia Veneered With CAD-On Lithium Disilicate Glass Ceramic. And The Effect Of Ageing On The Gap Of Both Restorations.

Materials and Methods: 40 Extracted Molars Were Prepared, Divided Into Two Groups, Control Group (ZR) (n=20), Teeth Restored With IPS E.max ZirCAD Copings Veneered With IPS E.max CAD And Intervention Group (PEEK) (n=20), Teeth Restored With BreCAM BioHPP Copings Veneered With BreCAM.HIPC. Each Specimen Was Photographed Using Leica S8 APO Stereomicroscope Under Magnification 32X And Image Analysis Was Done. Measurements Were Taken Twice Before And After Thermo-mechanical Cycling.

Results: PEEK Group Recorded Higher Gap Mean Values (49.88?7.97um) Than Zirconia (18.39?3.1um). This Was Significantly (p < 0.05) As Confirmed By Mann-Whitney Test, But All Measurements Were Clinically Acceptable. And Thermo-mechanical Cycling Had No Effect Of On Both Groups. Conclusion: PEEK Veneered With Composite Can Be Used Intra Orally For Single Crown Restorations.

Read More »

THE EFFECT OF AGING ON THE SURFACE ROUGHNESS AND HARDNESS OF STAINED MONOLITHIC DENTAL CERAMICS (IN VITRO STUDY)

Angel W. Habib, Moustafa N. Aboushelib And A.Nour A. Habib,

ABSTRACT

Objectives: To Study The Effect Of Aging On The Surface Roughness And Surface Hardness Of Stained Different Dental Ceramics.

Materials & Methods: Six Different All Ceramic Substrates (n=10/material) Mark II, Empress CAD, E.max CAD, ZirCAD LT, ZirCAD MT Multi And Suprinity Were Used. The Ceramic Materials Were Stained With Either IPS Ivocolor (n=5/material) Or Vita Akzent Stain (n=5/material). Aging Was Done According To ISO 6872. The Surface Roughness (Ra) Was Evaluated Using Profilometer, While The Surface Microstructure Was Examined Using Scanning Electron Microscopy (SEM). The Surface Hardness Was Measured Using Vicker?s Hardness Test. All These Tests Were Performed Before And After Aging. The Two-way ANOVA Tests And Bonferroni?s Post-hoc Test Were Used For Statistical Analysis.

Results: Aging Had Significantly Increased The Surface Roughness (?Ra) In All Specimens. The SEM Images Supported These Results As It Showed Scratches And Pitting Of The Surface. Aging Also Significantly Decreased The Surface Hardness, However ZirCAD LT When Stained With IPS Ivocolor And ZirCAD MT Multi And E.max When Stained With Vita Akzent Showed Significant Increase.

Conclusions: Aging Had Significantly Affected The Surface Roughness And Hardness Of The Stained Monolithic Ceramics.

Read More »

CLINICAL EVALUATION OF SSTABILITY OF SHORT IMPLANT VERSUS STANDARD IMPLANTS PLACED WITH INTERNAL SINUS FLOOR ELEVATION IN EDENTULOUS POSTERIOR MAXILLA: A RANDOMIZED CONTROLLED CLINICAL TRIAL (PART 2)

Mostafa Magdy Awad Mostafa, Mona Shoeib And Hani El-Nahass,

ABSTRACT
Objective: The Aim Of This Study Is To Clinically Evaluate The Stability Of Short Implants (5.5mm) Versus Standard Implant (10mm) Placed With Osteotome Sinus Floor Elevation In Patients With Edentulous Posterior Maxilla.

Materials and Methods: The Purpose Of This Study Is To Clinically Evaluate The Stability Of Short Implants (5.5mm) Versus Standard Implants (10mm) Placed With Osteotome Sinus Floor Elevation Technique In Medically Free Patients. This Study Included 16 Implants Placed In 16 Patients. With 8 Implants In Every Group.

Results: Pain And Swelling Were Measured 12 And 8 Days Respectively After Dental Implant Placement. Recession, Probing Depth, Bleeding And Plaque Indices Were Recorded 4 Months And 12 Months After The Day Of Implant Placement. Conclusion: After Analysis Of The Data Of This Present Study, We Can Conclude The Following: The Two Implant Placement Protocols Showed Comparable Implant Stability Quotient (ISQ) And Implant Success. In Terms Of Crestal Bone Loss, No Statistically Significant Difference Was Found Between Both Groups Initially, 6 And 12 Month Followup. Except After 4 Months, A Significantly Higher Mean Crestal Bone Loss Was Recorded In Long Implants With Sinus Lift Higher Results Of Post-operative Pain And Swelling (12 And 8 Days Respectively) Were Evident In The Control Group (standard Implant With Osteotome Sinus Floor Elevation) Than The Intervention Group (short Implant 5.5mm). But Found To Be Statistically Insignificant PPD, And MPI Showed No Statistically Significant Difference Between Both Groups. MBI Showed A Significant Higher Values In Long Implants After 4 Months (p=0.006) Than Short Implants.

Read More »

MICROBIOLOGICAL ASSESSMENT AFTER CHEMO-MECHANICAL CARIES REMOVAL USING PAPAIN-BASED ENZYME VERSUS CONVENTIONAL ROTARY TOOLS IN OCCLUSAL CARIOUS LESIONS: RANDOMIZED CLINICAL TRIAL

Laila Akmal, Mai Yousry, Essam Abd Elhafez And Mai Mamdouh,

ABSTRACT


Aim: The Aim Of The Study Was To Assess The Efficacy Of Caries Excavation Using The Papain-based Chemo-mechanical Method (Brix 3000) In The Reduction Of Streptococcus Mutans Count In Occlusal Carious Cavities

Materials and Methods: Twenty-three Patients Having Decayed Molars Were Selected Randomly And Divided Into Two Groups: Group A Before Being Treated By Brix 3000, Group B After Being Treated By Brix 3000. Two Dentin Samples Were Collected Before And After Caries Removal And Were Immediately Transferred To Sterile Disposable Test Tube Containing 1.5 Ml Thioglycollate Medium. Statistical Analysis Was Done Using Wilcoxon Signed Rank Test For Paired (matched) Samples.

Results: The Results Revealed A Statistically Significant Difference In The Mean Values Between Dentin Samples At The Baseline 230.2 ? 76.1and After The Application Of The Brix 104.1 ? 43.0 In CFU/ml Where (p<0.001). Conclusion: Brix 3000 Is A Viable Option For The Minimally Invasive Removal Of Dental Carious Tissue, Obtaining Significant Reductions In Total Bacterial Count.

Read More »

HYPER-SENSITIVITY ASSESSMENT AFTER IMMEDIATE VERSUS DELAYED DENTINE SEALING IN INDIRECT COMPOSITE RESTORATIONS: RANDOMIZED CONTROLLED CLINICAL TRIAL

Hoda O. Fouda , Mohamed F. Haridy And Mohamed R. Farid ,

ABSTRACT


Aim: To Evaluate The Efficacy Of Immediate Dentin Sealing Using Universal Adhesive In Comparison To Delayed Dentin Sealing In The Reduction Of The Hypersensitivity In Teeth Prepared For Indirect Tooth Composite Restorations Using Visual Analog Scale (VAS).

Materials and Methods: Fifty-four Patients Between 18 And 30 Years Of Age Were Recruited And Randomized To The Treatment Protocols. After Baseline Preoperative Data Collection, Diagnosis Of Caries Was Done Depending On The Basis Of Clinical Examination That Was Done Tentatively And Radiographic Examination Was Done As Well. After Cavity Preparation Was Done, For The Cavities To Be Managed With Immediate Dentine Sealing, The Single Bond Universal Adhesive Was Applied Over All The Dentinal Surfaces According To The Manufacturer?s Instructions. For The Cavities To Be Managed With Delayed Dentine Sealing, No Adhesive Was Applied On The Dentinal Surfaces And The Impression Was Taken Directly After Cavity Preparation Using Two-step Technique. Hyper-Sensitivity Was Evaluated Both Intra-operatively (at Baseline One Day After The Cavity Preparation: By Applying Air From The Triple Way Syringe Directly Over The Prepared Cavity And One Week During Temporization) And Post Operatively Using (VAS). After Try In And Cementation Of The Indirect Composite Restoration Post-cementation Evaluation Was Done. (VAS) Results Were Tabulated And Statistically Analyzed.

Results: Delayed Dentin Sealing Group (4.75) Had A Significantly Higher Median Value Of (VAS) Than Immediate Dentin Sealing Group (0.32) (P<0.001). There Was A Significant Difference Between The Scores At Different Follow-up Intervals (P<0.001). The Highest Median Value Of (VAS) Was Found At Baseline (3.37) Followed By That Found One Week During Temporization (2.91) While The Lowest Median Value Was Found One Week After Cementation (0.16). Pairwise Comparisons Showed Median Value Found One Week After Cementation (0.16) To Be Significantly Lower Than Those Found At Baseline (3.37) And One Week During Temporization (2.91) (P<0.001).

Conclusions: Inter-operative And Post-cementation Hypersensitivity Problem After Indirect Resin Composite Restorations Could Be Solved By Using The Immediate Dentin Sealing Protocol Using A Self-etch Adhesive.

Read More »

RELIABILITY OF SECONDARY CARIES DETECTION AROUND COMPOSITE RESTORATION USING LIGHT INDUCED FLUORESCENCE IN COMPARISON TO VISUAL TACTILE METHOD: DIAGNOSTIC ACCURACY STUDY

Haneen A ELmoselhy, Mohamed F. Haridy And Olfat E. Hassanein,

ABSTRACT

Objectives: To Assess The Reliability And Reproducibility Of Secondary Caries Diagnosis Using Light Induced Fluorescence Device ?Soprolife? In Comparison To Conventional Visual-tactile Method According To Modified USPHS Restoration Assessment.

Materials and Methods: A Total Of 29 Volunteer Patients Were Assigned In This Study. Each Patient Had At Least One Defective Posterior Occlusal Resin Composite Restoration. The Restoration Was Evaluated By Two Diagnostic Methods (D), Where D1 Represents Visual-tactile Assessment Method (according To Modified USPHS1) And D2 Represents Light Induced Fluorescence Intraoral Camera(SoproLife Camera) Intra And Inter-rater Reliability Were Analyzed Using Cohen?s And Fleiss? Kappa Respectively. McNemar?s Test Was Used To Study Inter And Intro Group Comparisons

Results: McNemar?s Test Showed That For All Raters And In Different Follow-up Intervals There Was No Significant Difference In Caries Detection With Both Methods (P>0.005). Conclusion: The Conventional Visual-tactile Method As Well As The Light Fluorescence Device SOPROLIFE Were Found To Be Valuable Complementary Diagnostic Methods For Diagnosis Of Secondary Caries Around Existing Restorations.

Read More »

INVESTIGATION OF THE INCIDENCE OF CARIES IN PITS AND FISSURES SEALED WITH BIOACTIVE SEALANT COMPARED TO FLUORIDE RELEASING RESIN BASED PIT AND FISSURE SEALANT: A SIX-MONTH RANDOMIZED CLINICAL TRIAL

Mohamed T. Heiba, Mohamed F. Haridy And Olfat E. Hassanein,

ABSTRACT

Objectives: To Investigate The Incidence Of Caries In Pits And Fissures Sealed With A Bioactive Sealant Compared To A Fluoride Releasing Resin Based Pits And Fissures Sealant In Preventive Treatment Procedures In Adult Population Over A Six-month Period.

Materials and Methods: A Total Of 40 Volunteer Patients Who Fulfilled The Inclusion Criteria Were Selected For This Randomized Split-mouth Clinical Trial. In Each Patient, The Two Types Of Pit And Fissure Sealant Were Used. A Fluoride-releasing Pit & Fissure Sealant (Seal-Rite?, S1) Was Placed In One Side, While A Bioactive Pit & Fissure Sealant (Embrace? WetBond?, S2) On The Contralateral Side; Such That The Total Number Of Sealants Placed In All Patients Were (N=80). All Sealants Were Evaluated Using Soprolife? Intra-oral Camera By Two Investigators Who Were Blind To The Material And Not Involved With The Treatment Procedures Used For The Restorations. Data Was Statistically Analyzed Using Cohen?s Kappa And Chi-square Tests.

Results: Immediate And 3-month Readings Revealed 100% Absence Of Caries In Both Groups. At 6 Months, Caries Developed In 8.8% Of Patients In S1, In Comparison To No Cases (0%) In S2. Chi Square Test Revealed No Statistically Significant Difference In Carried Incidence Between Groups. Conclusion: Bioactive Pit And Fissure Sealant As Well As Fluoride Releasing Sealant Could Be Considered A Valuable Preventive Method To Control Caries In Permanent Molars Over Six-month Period.

Read More »

COMPARTIVE STUDY OF RETENTION OF PEEK AND BRE. FLEX MATERIALS IN MAXILLARY BILATERAL BOUNDED REMOVABLE PARTIAL DENTURE (RANDOMIZED CLINICAL TRIAL)

Doaa Mohamed Sayed, Nadia A Abbas And Nora Cheta,

ABSTRACT
This Study Aimed To : Compare The Retention Of PEEK And BRE.FLEX (second Edition) Materials In Maxillary Class III Modification 1 Removable Partial Dentures Using Digital Gauge Force Device.

Materials and Methods: Thirty Four Patients Having Kennedy Class III Modification 1 Maxillary Partially Edentulous Ridges With Fully Dentate Mandibular Arch Were Divided Into Two Equal Groups To Fabricate The Thermoplastic Materials. The First Group Received PEEK Material. The Second Group Received Bre.Flex Material. The Retention Was Measured Using Digital Force Gauge Which Is An Advanced Type Of Force Meter Device : At The Time Of Denture Insertion, After Two Weeks And After Four Weeks Of Denture Insertion. The Collected Data Were Tabulated And Statistically Analyzed.

Results: Showed That The Difference Between The Two Groups Was Statistically Significant Was Reported Between Two Groups Regarding Retention. Conclusion : The Mean Retentive Force Required To Remove The Bre-flex Removable Partial Denture Was Found To Be Statistically Significant Lower Than This Required To Remove PEEK Removable Partial Denture .

Read More »

ADVANCED SEARCH

© Copyright 2019, All Rights Reserved. | Powered by HPH