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Article
Radiographic and microscopic evaluation of the efficacy of two different techniques in obt-uration of internal resorption defects (An in vitro comparative study)

Author: Ragheed M Basheer
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2005 Volume: 5 Issue: 5 Pages: 83-87
Publisher: Mosul University جامعة الموصل

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Abstract

This study was designed to determine the effectivenessof lateral compaction and ultrasonic condensation obturationtechniques for internal resorption defects, for which 20 extractedhuman maxillary central incisors teeth were selected.They were instrumented up to size 55 file. Their roots weresectioned transversely 6 mm from the apex and hemicircularcavities were prepared in both sections using #6 round bur.The sections were glued back together using cyanoacrylatethus obtaining root canal with cavities simulating internal resorption.The teeth were randomly divided into 2 groups of 10teeth each. The following obturation techniques were evaluated:Lateral compaction (Group I), and ultrasonic condensation(Group II). Ultrasonic condensation gave good results.Obturated internal resoption defects were filled mainly withgutta percha. Statistical analysis showed that there was significantdifference between Groups I and II. Results with lateralcondensation were inferior compared to ultrasonic condensationtechnique for obturation of simulated internal resorptiondefects Therefore, the latter technique is recommended to beused to obturate the defects of internal resorption defects inclinical practice.


Article
An Evaluation of Gutta-Percha Penetration Depth into Simulated Lateral Canals by Using Three Different Obturation Techniques (A Comparative Study)

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Abstract

Background:sThe aims of this study were to evaluate and compare the ability of three different techniques toobdurate simulated lateral canals, evaluate the effect of the main canal curvature on obturation of lateral canalsand compare the gutta-percha penetration between coronal and apical lateral canals.Materials and methods: Resin blocks with 30 straight and 30 curved were used in this study. Each canal has twoparallel lateral canals. The main canal has 0.3 mm apical diameter and 0.04 taper. The canals were divided into sixgroups according to canal curvature and obturation techniques used (n=10): Groups C1 and C2: straight andcurved canals obturated with continuous wave technique using E&Q masterTM system. Groups O1 and O2: straightand curved canals obturated with Obtura II. Groups T1 and T2: straight and curved canals obturated with Thermafilobturators. Soapy water was used to simulate sealer in all obturations performed. The depth of gutta-perchapenetration into lateral canals was measured using computerized stereomicroscope.Results: There were very highly significant differences between the obturation techniques at each lateral canal levelin both straight and curved canals. Continuous wave using E&Q masterTM system exhibited the greatest guttaperchapenetration into lateral canals with very highly significant difference from both other techniques at majorityof lateral canals. There was non- significant difference between Thermafil and Obtura II except at coronal lateralcanal of straight main canals where the difference was very highly significant.The gutta-percha depth was greater in coronal than apical lateral canals in all groups of both straight and curvedcanals, and gutta-percha depth was greater in straight than in curved canals within each obturation technique.Conclusion: This study showed that all the three obturation techniques used were able to obturate simulated lateralcanals with the continuous wave technique being the best. Gutta-percha depth was less in the apical than thecoronal lateral canals. Canal curvature can influence the gutta-percha depth


Article
Coronal sealing ability of different sealers on teeth obturation and the effectiveness of two different obturation techniques
قدرة السد الإكليلي لسدادات مختلفة على تسريب الأسنان وفعالية تقنيتين مختلفتين لسد الأسنان

Authors: Dara H. Saeed --- Intesar S. Toma --- Media A. Saeed
Journal: Zanco Journal of Medical Sciences مجلة زانكو للعلوم الطبية ISSN: 19955588/19955596 Year: 2012 Volume: 16 Issue: 3 Pages: 180-186
Publisher: Hawler Medical Univeristy جامعة هولير الطبية

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Abstract

Background and objectives: The purpose of this study was to evaluate the effect of two sealers on coronal seal and the coronal sealing ability of two obturation techniques. Methods: Forty extracted single–rooted human teeth were instrumented with the step-back technique and were irrigated with 5.25% sodium hypochlorite (NaOCl). The smear layer was removed by washing with 10 ml of 17% ethylene diamine tetra-acetic acid (EDTA) and 10 ml of 5.25% (NaOCl). All instrumented root canals were randomly divided into two experimental groups; Group A: 20 roots epoxy resin sealer (AH26) was used, Group B: 20 roots Zinc oxide euginol (ZOE) sealer was used. Each group of main groups were subdivided randomly into two obturation groups; 1. 10 roots obturated by thermo plasticized technique (obtura II), 2. 10 roots obturated by cold lateral compaction technique. The root surfaces were then coated with nail polish except for the coronal, then dye penetration study was conducted and samples were examined under the stereomicroscope. Data had been collected from three independent examiners and statistically analyzed using student t-test. Results: There were significant differences between AH26 with ZOE in group obturated by obtura II and when obtura II technique compared with the cold lateral compaction technique in group of AH26 sealer. Conclusion: Epoxy resin sealer (AH26) and obtura II gave the best results in coronal sealing when compared with Zinc oxide euginol sealer and cold lateral compaction technique.


Article
The effect of smear layer removal on apical seal of teeth obturated with two different obturation techniques
تأثير إزالة طبقة اللطاخة على الختم القمي للأسنان المغطاة بطريقتين مختلفتين للتسرب

Author: Media A. Saeed
Journal: Zanco Journal of Medical Sciences مجلة زانكو للعلوم الطبية ISSN: 19955588/19955596 Year: 2011 Volume: 15 Issue: 3 Pages: 56-63
Publisher: Hawler Medical Univeristy جامعة هولير الطبية

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Abstract

Background and objectives: .The purpose of this study was to evaluate the effect of smear layer removal on apical seal and the quantity of microleakage associated with lateral cold condensation and thermafil obturation.Methods: Forty extracted single–rooted human teeth were randomly divided into two experimental groups; in group A, 20 roots with smear layer free, 5.25 % sodium hypochlorite (NaOCl) and 17% Ethylenediamine tetraacetic acid (EDTA) were used as irrigants to remove the smear layer, while in group B, 20 roots with smear layer, normal saline was used as irrigant. All root canals were instrumented with the Pro-taper rotary system using a crown-down technique. Each group of instrumented roots were subdivided randomly into two obturation groups; in group 1, 10 roots were obturated by thermafil with plastic carrier, while in group 2, 10 roots were obturated by cold lateral compaction technique. Zinc oxide euginol was used as the sealer. The root surfaces were then coated with nail polish except for the apex, then dye penetration study conducted and samples were examined under the stereomicroscope. Data had been collected from two independent examiners and statistically analyzed using student t-test.Results: There was non significant difference between all the groups radiographically while stereomicroscopic analysis showed significant difference of smear layer free group when obturated by thermafil with other groups. Conclusion: Smear layer free group gave the best results when used with lateral condensation technique (LCT) and smear layer group gave the best results when used with thermafil.

Keywords

Smear layer --- Thermafil --- Obturation


Article
A comparison of spreader penetration depth and load required in curved canal using two types of spreaders

Author: lman M. Al-Zaka B.D.S., M.Sc د.ايمان محمد الزقة
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2005 Volume: 2 Issue: 2 Pages: 167-172
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The aim of the present study was to compare nickel titanium and stainlesssteel spreaders penetration depth and load in lateral compaction. Thirty curved mesialcanals of extracted mandibular molars were used in the study. The canals wereprepared using step-back technique with Gates-Glidden. Afterward the teeth weredivided randomly into 2 groups. In part 1 of the study, the force required to inserteach spreader to within 1 mm of the working length in an empty canal was measured .In part 2, the force required to insert each spreader to within 2 mm of the workinglength was measured in canal containing a master cone. ln part 3, the depth ofpenetration of each spreader with a master cone in place using a 1.5 kg force wasmeasured. Using a t-test for paired samples, the results from pan 1 showed that nickeltitanium spreader required high significantly less force than stainless steels reader P<0.01 . ln part 2, a nickel titanium s reader re uired high si niticantl lessforce than a stainless steel spreader .As expected in part 3, a nickel titanium spreaderpenetrated to a significantly high depth than stainless steel spreader (P<0.0l


Article
A comparison of apical microleakage after lateral condensation of different tapered master cone in canals prepared by ProFile rotary instruments

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Abstract

Forty five mesial canals of extracted human mandibular molars were instrumentedwith ProFile ISO .06 nickel-titanium rotary instruments and obturated with lateralcondensation using three different master cones: .06 tapered gutta-percha cone (groupI), .04 tapered gutta-percha cone (group II), .02 tapered gutta-percha cone (group III).Zinc oxide eugenol sealer was used in all groups. After 48 hours in an incubator, theroots were coated with nail polish and were the submerged in methylene blue dye for72 hours. The roots were then split longitudinally and the apical leakage measuredand compared for each group. Although there was no statistical significant differenceamong groups (P>0.05), group (I) with .06 tapered gutta-percha master cone showedthe lowest mean of dye penetration.


Article
An evaluation of apical microleakage in roots filled with thermoplastic synthetic polymer based root canal filling material (RealSeal 1 bonded obturation)

Authors: Nadine J. Adbul-rada نادين جمال عبد الرضا --- Adel F. Ibraheem عادل فرحان ابراهيم
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 21-26
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: This study aimed to evaluate and compare the apical microleakage of roots canal filled with coldlateral condensation of gutta-percha, cold lateral condensation of Resilon, Thermafil and RealSeal1 bondedobturation.Materials and methods: Sixty freshly extracted maxillary first molars with straight palatal roots .Using diamond disc burwith straight hand piece and water coolant the palatal roots of teeth were sectioned perpendicular to the long axisat the furcation area. All roots were prepared with crown-down technique using hand ProTaper system (Sx-F4).Theprepared roots randomly divided into 4 groups of fifteen roots each; the groups obturated with different obturationtechnique. In Group 1 roots obturated with( lateral condensation of gutta-percha), Group 2 was obturatedwith(lateral condensation of Resilon),group3 was obturated with (Thermafil) while in group4 obturated with( RealSeal1 bonded obturation).All the samples sealed coronally and stored in normal saline at 37°C for one week ,then all theroots submerged Indian ink for one week. The roots were cleared and the degree of linear dye penetration wasmeasured in millimeter by stereomicroscope under 40X magnification with calibrated scale ocular grid.Results: The results showed that the RealSeal1 bonded obturation leaked apically significantly higher than other testgroups, while the group of lateral condensation of gutta-percha exhibited the least value of apical microleakage.Conclusion: The complete hermetic apical seal cannot be created neither with gutta-percha nor with Real Seal1bonded obturation


Article
Evaluation of different techniques used in non surgical endodontic retreatment for teeth with different obturation techniques (An in-vitro study)

Authors: Nsar Muhyaddin Aziz نصر محي الدين عزيز --- Dara Hamarashed Saeed دارا سعيد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: special issue 1 Pages: 31-35
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Retreatment procedures in endodontic practice require complete removal of the original root fillingmaterials. The aim of this study was to evaluate the efficacy & time required for rotary Nickel titanium NiTi instruments(Pro-Taper) with and without solvent in the removal of obturation materials during root canal retreatment incomparison with hand instruments using Hedstrom files with solvent in relation to different obturation techniques.Materials and method: Ninety extracted human roots were instrumented by ProTaper rotary files to (F3) ISO # 30 andthe samples were randomly divided into three groups of 30 roots for each group A: obturated by cold lateralcondensation technique, group B: obturated by Injectable thermoplasticized technique, group C: obturated bycarrier based gutta-percha technique (Soft Core) obturator. Each main group of roots was randomly subdivided intothree subgroups, 10 roots each. Removal of gutta-percha was performed the following techniques; (1) Pro-Taperwithout solvent, (2) Pro-Taper with solvent and (3) Hedstrom files with solvent. The roots were split longitudinally. Thearea of remaining filling was evaluated by using stereomicroscope at three levels in the canal and time ofretreatment was determined in each group.Results: One-way ANOVA test indicated that the rotary NiTi instruments Pro-Taper with and without solvent leftsignificantly less remaining filling materials (P < 0.001) compared to Hedstrom files with solvent while there was nosignificant difference at (p<0.05), between Pro-Taper with solvent and without solvent. In groups obturated by coldlateral condensation and injectable thermoplasticized techniques left significantly less remaining filling materials at(p<0.05), than group obturated by soft core obturators. The retreatment time was significantly less at (P < 0.001)when the rotary NiTi Pro-Taper instrument was used compared to hand.Conclusion: ProTaper rotary instrument with and without solvent was found to be effective and faster than handinstruments and Cold lateral condensation technique and inject able thermo plasticized technique better removedin retreatment than Soft Core obturator technique


Article
Evaluation the Quality Three Different Obturation Technique Using Multi-Slice Computed Tomography: An In-Vitro Study

Authors: Huda A. Abduallah --- Ahmed M. Jasim --- Omar B. Taha Ahmed M. Jasim
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2014 Volume: 3 Issue: 1 Pages: 9-16
Publisher: Tikrit University جامعة تكريت

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Abstract

After endodontic space has been completely cleaned, shaped and disinfected, a three-dimensional obturation of this space will be the ultimate objective of endodontic therapy. With a durable three dimensional obturation any communication with the periodontium will be eliminated and prevented. The aim of this study was to use multi-slice CT scanning to determine: (i) number of voids (ii) diameter or length of voids and (iii) presence of voids at material/tissue interfaces in root canals obturated with: (a) E & Q Master (b) Lateral Condensation, and (c) Soft Core system. Thirty freshly extracted human mandibular premolar teeth were used in this study. After preparation of the root canals, the teeth were divided into three groups with 10 teeth in each groups. G1 obturated with E&Q master, G2 obturated with Lateral Condensation, and G3 was obturated with Soft Core. GuttaFlow was used as sealer for all groups. After obturation all the specimen were analyzed with multi-slice CT, the data obtained was statistically analyzed using ANOVA test followed by Duncan's multiple range test ,a value of p< 0.05 was considered statistically significant.Voids are observed in all groups, Neither technique was free of voids or perfectly smooth. Overall, the canals that obturated with E&Q master showed the lowest number of voids (3.0), whereas those obturated with lateral condensation showed the highest number (3.9) and the differences was statistically significant. The canals that obturated with Soft core showed the highest mean of voids diameter ( 0.77 mm) , whereas those obturated with E&Q master and lateral condensation had the lowest mean (0.62 mm and 0.61 mm) respectively, and the differences were statistically significant. The percentage of outer voids was higher for all techniques than the inner voids. The presence of inner voids was the highest in canals that obturated with soft core system (9.230%). Conclusion: E&Q master of obturation show the lowest number of voids. Obturation with Soft core show the highest mean of voids diameter. In all obturation techniques, the outer voids was higher than inner voids.


Article
Evaluation of the push-out bond strength of root canal obturation materials filled by four different obturation techniques

Authors: Saif N, --- Nawal A. Al Sabawi نوال السبعاوي --- Maha M. Yahya مها يحيى
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 2 Pages: 37-43
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The aim of this study was to comparatively evaluate the push out bond strength (PBS) of root canalfillings using four different obturation techniques (single cone (SC), cold lateral compaction (CLC), continuous wave(CW), and carrier based gutta percha (CBG)).Materials and Methods: Forty mandibular premolar decoronated and instrumented with rotary ProTaper to F3 thenteeth were divided randomly into 4 groups of 10 teeth for each as follow: group (I) single- cone obturation withmatched-taper gutta-percha, group (II) cold lateral compaction technique, group (III) continuous wave ofobturation technique, and group( IV) carrier based gutta-percha technique. Zinc oxide eugenol (ZOE) sealer wasused as a root canal sealer for the four groups. After obturation of the root canals, all the roots were sectionedhorizontally at three levels in the apical, middle, and cervical thirds of each group. PBS test was performed usingdigital universal testing machine. Mode of failures was evaluated using digital stereomicroscope (40 X). Collecteddata were analyzed statistically using one way ANOVA and Tukey test.Results: PBS of CW and CBG significantly higher than SC and CLC, but significantly there were no differencesbetween CW and CBG, and between SC and CLC.Conclusion: Under the condition of this study it can be concluded that thermoplasticized techniques obtain superiorPBS of the filling materials in comparisons with cold gutta percha obturation techniques

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