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Article
A study to compare the cleaning efficiency of three different irrigation devices at different root canal levels (An in vitro study)

Authors: Walid N. Al- Hashimi وليد الهاشمي --- Ali H. Alani علي هاني العاني
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: 4 Pages: 10-15
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Irrigation of the canal system permits removal of residual tissue in the canal anatomy that cannot bereached by instrumentation of the main canals so the aim of this study was to compare and evaluate the efficiencyof conventional irrigation system, Vibringe sonic irrigation system and Endovac irrigation system in removing of dentindebris at three levels of root canals and to compare the percentage of dentin debris among the three levels foreach irrigation system.Materials and methods: Forty-five extracted premolars with approximately straight single root canals were randomlydistributed into 3 test groups of 15 teeth each. All canals were prepared with Protaper Universal hand files to size #F4,and irrigated with 2.5% NaOCl 1ml between files and 5ml for 60 seconds as a final irrigant by different irrigationdevices; group one, by using conventional system; group two, by using Vibringe sonic irrigation system and groupthree, by using the Endovac system. After the final irrigation, the roots were split longitudinally and photographedwith a digital camera. The roots were magnified to 100X; a percentage of debris was calculated for the apical 0-3, 3-6 and 6-9 mm. The debris score was calculated as a percentage of the total area of the canal that contained debrisas determined by pixels in Adobe PhotoshopCS2. Data were analyzed statistically by ANOVA and LSD at 5%significant level.Results: when comparing the debris remaining, both the Endovac and Vibringe groups showed significantly lessdebris than the conventional group at all three levels (p < 0.01). The Endovac group showed significantly less debristhan the Vibringe group at 3-9 mm levels while no significant difference found between the Endovac system andVibringe system at apical 0-3mm .The apical 0-3 mm showed significantly more debris than both the 3-6 and 6-9 mmfor all groups.Conclusion: the EndoVac system showed a higher cleaning capacity of the canal at all levels, followed by theprotocols that used Vibringe sonic irrigation system. The conventional irrigation system with maxi-i-probe needlesshowed inferior results. The apical three millimeters showed a greater amount of debris than the 3-9 millimetres fromthe working length, regardless of the irrigation device used.

Keywords

dentin debris --- Vibringe --- Endovac


Article
An in- vitro evaluation the effect of endodontic irrigation solutions on the microhardness of root canal dentin. Prof.

Authors: Dr. Itab Nasser Hussein د. عتاب ناصر --- Dr. Abdul Karim AL-azzawi د. عبد الكريم العزاوي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2011 Volume: 8 Issue: 1 Pages: 19-23
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The aim of this study was to evaluate the effect of 5.25 sodium hypochlorite and17%EDTA on the microhardness of root canal dentin .Fifteen, maxillary incisor teeth extracted for periodontal reasons were used. Thecrowns of the teeth were removed at the CEJ. The roots were separated longitudinallyinto two segments, embedded in acrylic resin, and polished. A total of 30specimenswere divided into 3 groups of 10 teeth at random according to the irrigation solutionused: group 1: 5.25% NaOCl for 1min; group 2: 17% EDTA for 1 min; and group 3:distilled water (control). Each group was submitted to Vickers microhardnessindentation tests. The data were recorded as Vickers numbers and the results wereanalyzed statistically by using one-way ANOVA.The results showed that, irrigation with either sodium hypochlorite or EDTAdecreased the microhardness value of root dentin. Irrigation with EDTA gave morereduction of dentin compared to sodium hypochlorite. The reduction of VHN ofdentin following the irrigation treatment was statistically significant (p< 0.05 ) .Both sodium hypochlorite and EDTA irrigation solution significantly reduced themicrohardness of root dentin.


Article
Effects of composite thickness on shear bond strength to dentin

Authors: Sabah Abdul—Wahab Ismail BDS,M.Sc *. د.صباح عبد الوهاب --- Abdul-Haq Abdul-Majeed Suliman BDS,M.Sc.,Ph.D د. عبد الحق عبد المجيد
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2005 Volume: 2 Issue: 2 Pages: 150-156
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Sixty non-carious extracted human molars were used in this study. The enamelon the occlusal surface ofthe crown of the tooth was removed by a diamond bur thenthe surfaces of the teeth were ground flat. The teeth were randomly divided into sixgroups each of ten and stored in distilled water at 370 C. Two types of composite wereused in this study, Definite and Tetric. The bonding agents Etch and Prime wereprepared according to manufacturers directions and applied to the dentin surface onthe first three groups and light cured for 20 seconds. The composite Definite waspacked into either 2, 3, and 4mm thick using split metal mould in the first, secondand third groups respectively and bulk-cured from top of the composite for 40seconds, the same procedure was repeated in the remaining three groups but thecomposite used was Tetric which its corssponding bonding agent was Excite. Thebond strength was measured with universal compression machine.The results showed `that there was no significant difference between the two types of composite Tetric andDefinite used in this study. The shear bond strength was affected by the compositethickness, the 2 mm increment showed higher bond strength than the 3mm and 4mmincrement in both composites


Article
Evaluation of Chemo-mechanical Caries Removal (CarisolvTM Gel) on Primary Teeth: A Microhardness Study

Author: Baydaa A Al-Rawi
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2012 Volume: 12 Issue: 2 Pages: 289-294
Publisher: Mosul University جامعة الموصل

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Abstract

the purpose of this study was to compare the Vickers hardness of sound dentin after carious tissue removal using the chemo–mechanical method and the conventional rotary method. Materials and Methods: The carious dentin of thirty extracted human primary lower second molars was removed using Carisolv™ and conventional rotary methods. The Vickers hardness number (VHN) of the cavity floor was determined and the adjacent sound dentin of each tooth was used as a control reference. Results: The results indicated no statistical difference in the microhardness of the dentin in the cavity floor after treatment with Carisolv™ gel and conventional rotary method and no statistical difference in the microhardness of the dentin of both types of caries removal compared with the adjacent control areas. Conclusions: The Carisolv™ gel does not cause a significant change in the microhardness of dentin that remains after being submitted to carious tissue removal.


Article
Evaluation of Shear Bond Strength of Composite Resin Bonded to Dentin with Three Different Adhesive Systems

Author: Huda A. Abduallah هدى عباس عبد الله
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2012 Volume: 1 Issue: 2 Pages: 13-18
Publisher: Tikrit University جامعة تكريت

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Abstract

Aim of the study to measure the shear bond strength of composite resin bonded to dentin with three different adhesive system.The buccal surfaces of 30 non-carious, intact, extracted upper premolar (Freshly extracted for orthodontic treatment), were grinded with 600 grit silicon carbide paper to expose dentin surface. the samples were divided into three groups: G1, 10 teeth were bonded with an acetone-base total-etch Prime&Bond NT G2, 10 teeth were bonded with an ethanol-base total-etch Excite. G3,10 teeth were bonded with an ethanol-and water-base total-etch Schotchbond 1. Shear bond strength is determined by using Instron testing machine.Results showed that excite adhesive system has statistically high significant increase in shear bond strength than Schotchbond 1.As conclusion; the lack of water in the adhesive may play a more important role than the type of solvent itself.


Article
A study to compare the cleaning efficiency of different irrigation systems for macro debris removal in instrumented canals (An in vitro study)

Authors: Hussein A. Hussein --- Mohammed R. Hameed محمد رشيد حميد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2015 Volume: 27 Issue: 2 Pages: 11-16
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Irrigation of the canal system permits removal of residual tissue in the canal anatomy that cannot bereached by instrumentation of the main canals so the aim of this study was to compare and evaluate the efficiencyof conventional irrigation system, endoactivator sonic irrigation system,P5 Newtron Satelec passive ultrasonicirrigation and Endovac irrigation system in removing of dentin debris at three levels of root canals and to comparethe percentage of dentin debris among the three levels for each irrigation system.Materials and methods: Forty extracted premolars with approximately straight single root canals were randomlydistributed into 4 tested groups of 10 teeth each. All canals were prepared with Protaper Universal hand files to size#F4, and irrigated with 2.5% NaOCI 1 ml between files and 5ml for 60 seconds as a final irrigant by different irrigationdevices; group one, by using conventional system; group two, by using Endoactivator sonic irrigation system, groupthree, by using Satelec Passive Ultrasonic irrigation and group four by using the Endovac system. After the finalirrigation, the roots were split longitudinally and photographed with a digital microscope. The roots were magnifiedto 100X; a percentage of debris was calculated for the apical 0-3, middle 3-6 and coronal 6-9 mm. The debris scorewas calculated as a percentage of the total area of the canal that contained debris as determined by pixels inAdobe PhotoshopCS5. Data were analyzed statistically by ANOVA and LSD at 5% significant level.Results: when comparing the debris remaining, the Endovac, Endoactivator and Satelec groups showed significantlyless debris than the conventional group at all three levels (p < 0.01). The Endovac group showed significantly lessdebris than the Endoactivator group at middle and coronal levels while no significant difference found between theEndovac system and Endoactivator system at apical level. The apical 0-3 mm showed significantly more debris thanboth the middle and coronal level for all groups.Conclusion: The EndoVac system showed a higher cleaning capacity of the canal at all levels, followed by theprotocols that used Endoactivator sonic irrigation system. The conventional irrigation system with maxi-i-probeneedles showed inferior results. The apical three millimeters showed a greater amount of debris than the 3-9millimetres from the working length, regardless of the irrigation device used


Article
Bond Strength of Resin Composite to Laser Treated Dentin Using Different Adhesive Systems (An in vitro study)

Authors: Zena A. Ahmed --- Makdad N. Chakmakchi
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2015 Volume: 15 Issue: 2 Pages: 405-411
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To evaluate the effect of three different adhesive systems on shear bond strength of composite resin to Er,Cr:YSGG lased dentin. Materials and methods: Twenty one sound third molars were used. Occlusal third of crowns was cut using minitom machine to expose flat dentin surface. Laser irradiation was performed on a circular test area demarcated on each dentin surface. Samples randomly assigned to three groups (n=7) according to the adhesive systems that used which were: total etch adhesive (Adper single bond, 3M ESPE), two step self etch adhesive (Clearfil SE bond, Kurary), and all in one adhesive (Adper easy one, 3M ESPE). Adhesives were applied to the lased dentin surface according to manufacture instruction. Composite rod was applied over the bonded area and cured. Samples were stored in distilled water at 370for 24 hours. The evaluation of shear bond strength was employed by the use of universal testing machine. Results: Statistical analysis of data by analysis of variance (ANOVA) test and Duncanes multiple range test revealed no significant difference in the shear bond strength between the adhesive systems (P≤ 0.05). Conclusions: The results show that all the tested adhesive systems have relatively the same effect on the shear bond strength of composite resin to lased dentin surface.

Keywords

Dentin --- Er --- Cr:YSGG laser --- adhesive system.


Article
Failures of Porcelain Laminate Veneers Using Different Techniques of Bonding, A Comparative Study

Authors: Safa Adnan Gaeed --- Prof. Ammar Atta-Allah Ali
Journal: Journal of Oral and Dental Research مجلة طب الفم والاسنان ISSN: 23106417 Year: 2017 Volume: 4 Issue: 1 Pages: 35-46
Publisher: Iraqi Association for Oral Research الجمعية العراقية لبحوث طب الفم

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Abstract


Article
EVALUATION OF THE OCCLUDING EFFECT OF SENSODYNE WITH STRONTIUM CHLORIDE 0N MICROLEAKAGE THROUGH DENTINAL TUBULES OF ENDODONTICALLY TREATED TEETH

Author: Sameer I Kadokana سمير اسحاق
Journal: IRAQI JOURNAL OF MEDICAL SCIENCES المجلة العراقية للعلوم الطبية ISSN: P16816579,E22244719 Year: 2011 Volume: 9 Issue: 4 Pages: 376-383
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

BackgroundDentin hypersensitivity may be defined as pain arising from exposed dentin. The relationship between dentin hypersensitivity and the patency and Microleakage through dentinal tubules has been established in vitro. Currently the most accepted mechanism of nerve activation associated with dentin hypersensitivity appears to be hydrodynamic in nature.Objectives: The concept of tubule occlusion as a method of dentin desensitization is a logical conclusion of the hydrodynamic theory.MethodsForty two human maxillary anterior teeth were selected, the crowns were cut away at the CEJ, the root canals prepared, cleaned and filled then the coronal access closed with zinc phosphate cement. The specimens were randomly divided into four groups, two of them experimental A and B and two controls C (positive) and D (negative). All the specimens were coated with sticky wax except the ring that had cementum removed while the negative control specimens were entirely coated with sticky wax. All the specimens were stored in human saliva which was changed daily for 21 days with daily brushing of specimens of group A with a Sensodyne tooth paste (that with active ingredient Strontium chloride). At the end of the 21 days, the specimens were immersed in pelikan ink for three days then the sticky wax was removed, after that the teeth were cleared to make them transparent to provide a three dimensional assessment of dye penetration. The teeth were subjected to linear dye penetration measurement and scanning electron microscope analysis to investigate whether Sensodyne with Strontium chloride occlude dentinal tubule orifices.ResultsStrontium chloride, the active ingredient of Sensodyne tooth paste has a tubule occluding property which may indicate a therapeutic potential in vivo. Also scanning electron microscopic analysis revealed presence of deposits in and around the tubular orifices.ConclusionSensodyne with strontium chloride proved effective (in vitro) in occluding the orifices of patent dentinal tubules.KeywordsDentin hypersensitivity, Dentinal tubules occlusion, Sensodyne with strontium chloride.


Article
Bond strength to etched and Re-etched enamel, dentin and dentino-enamel junction

Authors: Dr. Maha Adnan Habeeb. د.مها عدنان --- Dr. Angham Ghiyath Al-Hashimi B.D.S, M.Sc. د. انغام غياث
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2011 Volume: 8 Issue: 2 Pages: 100-105
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Etching and re-etching are frequently done technique to alter the tooth surface andmakes it more receptive to adhesion. This study was done to assess the effect of reetchingtechnique on bond strength to enamel, dentin and dentino-enamel junction.60 extracted human upper premolars teeth were collected cleaned, sectioned at thelevel of cervical line, embedded in acrylic block exposing certain grounded flatsurface of the crown and divided into 2 groups:Group A (30 etched specimens) etched with total etch (37% phosphoric acid)for 15 sec.Group B (30 re-etched specimens) etched and re-etched with total etch(37% phosphoric acid).Both groups were subdivided into:Subgroup 1 10 enamel specimensSubgroup 2 10 dentin specimensSubgroup 3 10 dentino-enamel junction specimensA standardized cylinders of light cure composite resin were bonded, and thespecimens were stored in deionized distilled water for 24 h. and testing was done withzwick test machine and statistically analyzed using analysis of variance test(ANOVA) and student t-test.The results showed non significant difference between all subgroups in groupA(etching group) and between all subgroups in group A Vs. group B subgroup 2(reetchedE), and showed a significant difference between all subgroups in group A Vsgroup B subgroup 3 (re- etched EDJ) and between group B sub1&2 (re-etched E & D)Vs group B sub 3 ( re-etched DEJ) ,furthermore there were a highly significantdifferences between all subgroups in group A Vs group B sub 2(re-etched D) andbetween group B sub 2(re-etched E) Vs groupB sub 2(re-etched D).Re-etching the enamel didn’t decrease the shear bond while re-etching dentinmarkedly decreased the bond strength. Further more re-etching the dentino-enameljunction lies in between.

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