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Article
The flaring efficiency of the Profile and Protaper on resin simulated root canals

Author: Qussay A. Al-Jawhar , M.Sc د. قصي الجهار
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2005 Volume: 2 Issue: 2 Pages: 173-182
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Forty resin simulated root canals with standardized curvature prepared for thisstudy, divided into four groups ten canals for each group. Thirty canals were preparedwith rotary endodontic instruments, profile 04, profile 04, 06 and protaper, ten canalsfor each type, with slow speed contra angle hand piece (300 rpm) using crown — downtechnique the other l0 canals were prepared with stainless steel k-flexo handinstrument using step — back technique. The total time required for preparation wascalculated. The resin blocks were scanned; the pre-instrumented and post -instrumented images were stored in the computer and superimposed for twodimensional evaluation of canals preparation using Adobe photoshope 8.0 and Coreldraw 9. For the coronal portion the amount of canal substance removed wascalculated at 7mm, 9mm, llmm levels from the working length. For the apicalcurvature the centering ratio was calculated at 2mm and 4mm level from the workinglength. The results showed that the amount of canal substance removed from thecoronal portion by protaper was statistically higher than other groups with statisticallyless ability to stay center in the canal than profile rotary instruments but more abilityto preserve apical curvature than k-flexo hand instruments with less time required forpreparation. K-flexo files showed statistically less amount of canal substance removalat coronal portion and statistically higher centering ratio than other groups, andrequire more time for canals preparation .


Article
In vitro evaluation of sealing ability of matched-taper single cone obturation with an electrochemical method.

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Abstract

Abstractwidespread use of rotary Nickel-Titanium systems has caused manufacturers toproduce gutta-percha cones that match the taper of the canals prepared with thesesystems. The aim of this study was to use electrochemical method to compare theapical sealing ability of taper single-cone, Thermafil obturation in canals preparedwith ProTaper and ProFile instruments. Forty extracted human mandibular premolarwere divided into 2 groups. All canals in group (A) prepared with ProFile, while allcanals in group (B) prepared with ProTaper. Each group subdivided into twosubgroup according to the method of obturation, (Thermafil and matched taper- singlecone).The apical leakage in these groups was evaluated using an electrochemicalmethod. T-test showed a non significant difference between Thermafil and matchedtaper-single cone obturation technique in the same group. A significant difference wasfound between ProTaper and ProFile group in both obturation techniques.


Article
A Comparison between immediate and delayed post space preparation on the apical seal prepared by hand protaper instruments

Author: Dr. Biland Mohammed Salim.* د.بلند محمد سليم
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2008 Volume: 5 Issue: 3 Pages: 232-238
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Forty single-rooted human mandibular premolar were instrumented with hand ProTaper instruments and obturated with gutta-percha and Zinc oxide eugenol sealer. Then all teeth were divided to two group the first group received immediate post space preparation half teeth with hot plugger and other half with peeso reamer, the roots were coated with nail varnish and were immersed in methylene blue 2% for 72 hours in an incubator. After one week the other group received delayed post space preparation same as the first group and coated with nail varnish and were immersed in methylene blue 2% for 72 hours in an incubator. All roots splitted longitudinally and the apical leakage measured and compared for each group. The minimal leakage value and the lowest mean of leakage were observed in subgroup one, while the maximum leakage value and the highest mean of leakage was obvious in subgroup four. A significant difference was found in the group of roots that received delayed post space preparation using peeso reamers, which showed more apical leakage than other subgroups.


Article
The influence of instrument application frequency on the apical extrusion of debris using rotary ProTaper, hand ProTaper and hybrid technique (An in vitro study)

Authors: Majida K. Al-Hashimi ماجدة الهاشمي --- Zaid K. Al-Doory زيد الدوري
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 4 Pages: 34-39
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Various kinds of hand-held or rotary instruments and techniques are used for mechanical preparationof the canal during root canal treatments. These instruments and techniques may push debris out of the canalswhich may induce inflammation within the periapical area; therefore, instrumentation technique that causes lessextrusion of debris is more desirable. The aim of this study was to compare the effect of instrument applicationfrequency on the amount of apically extruded debris.Materials and Methods: One hundred and twenty extracted human teeth were used in this study; all teeth wereshortened to a length of 15 mm. Each experimented root was mounted on a centrifuge tube that forced through aprecut hole in a rubber stopper of a glass vial. The roots were divided randomly into 3 groups, each group contained40 roots. Group R: prepared by rotary ProTaper, Group H: prepared by hand ProTaper, Group S: prepared by Hybridtechnique. Each group was further subdivided in to five subgroups (A, B, C, D, and E). Debris extruded from apicalforamen was collected in a centrifuge tube containing 0.5 milliliter of distilled water. Each empty centrifuge tube wasweighed before preparation by 0.0001g. sensitive weighing machine. Then at the end of canal preparation, thesecentrifuge tubes were completely dried using an incubator at 68 C° for two days and weighed again. The differencebetween the weights of tubes in two stages represented the weight of debris extruded from apical foramen duringinstrumentation.Results: No significant difference recorded for the mean weight of apically extruded debris regarding the instrumentapplication frequency within the same instrumentation technique; but there was a high significant difference for thesubgroups (A, B, C, and D) and a significant difference for subgroup E, regarding the effect of instrumentationtechniques on amount of apical extrusion of debris among tested groups.Conclusion: The hand ProTaper extruded smaller amounts of apical debris than the rotary ProTaper and largeramounts than Hybrid technique


Article
The Effect of Two Endodontic Rotary Systems in Root Canal Preparation on Apical Microleakage

Authors: Sabah A Ismail --- Nawfal A Zakaria --- Manal A Sultan
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 21 Pages: 37-43
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: the aim of this in vitro study was to evaluate the apical sealing ability where the canals are pre-paid by two rotary NiTi systems . Materials and Methods: Thirty-six extracted human teeth with sin-gle root cut there crowns at the cemento-enamel junction CEG. The working length was determined for each tooth. The teeth were divided in to (3)groups ten of each . Group I the teeth were instrumented with ProTaper NiTi then the teeth obturated with matched-taper single cone. Group II of teeth were instrumented with RaCe NiTi rotary instrument and then obturated with matched-taper single cone. Group III were instrumented by hand instruments K-files and obturated by the lateral condensation techniques. Six teeth were divided as positive and negative control group three for each one . Tgadeseal was used as root canal sealer in this study. Adye penetration method was used to evaluate the apical seal using steromicroscope at 40X magnification. One-way analysis of variance and Duncan's test were used for statistical analysis. Results: The statistical analysis of the results demonstrated that there was no statistically significant difference in Microleakge between the two different rotary instrument each ProTaper and RaCe. While there was significant difference between the rotary instrument and the Hand instrument K-files. Conclusions: The use of the NiTi rotary instrument for root canal preparation showed the least apical microleakage, in compaired with hand instrument


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


Article
Smear Layer Removal and Apical Extrusion Evaluation Among Different Irrigating Techniques and Solutions (In vitro Comparative study)

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Objectives: The aim of the present study was to compare the effectiveness ofEndovac, Vibringe and needle with different irrigation solutions on removal ofsmear layer and apical extrusion of irrigating solution.Methods: Seventy-two sound human premolar teeth were used and divided into threeexperimental groups (n=24) according to the type of irrigation technique used: Ingroup1 irrigation was performed with Vibringe. In-group 2 irrigation wasperformed with a 30-gauge side-vented irrigation needle. In-group 3 irrigation wasperformed with Endovac. Instrumentation was performed by using the ProTaperfiles. Each main group divided into three sub-groups (n=8) according to irrigationsolution used: In sub-group 1 Irrigation was performed with 5.25% Sodiumhypochlorite (NaOCL). In sub-group 2 Irrigation was performed with 17%Ethylene Diamin Tetra Acidic Acid (EDTA). In sub-group 3 Irrigation wasperformed with 5.25% NaOCL and 17 % EDTA. The amount of extrudedirrigating solution was then measured by subtracting the weight before finalirrigation from the weight after final irrigation using the electronic balance. Thecleanliness of smear layer removal was evaluated using scanning electronmicroscopy.Results: The results showed that the group that resulted in more irrigation extrusionwas as follow from highest to lowest: side-vented >Vibringe> Endovac. Thedifference among all groups was significant. As for cleaning results, smear layercollection in both EndoVac and Vibringe groups were less than side-vented groupand these differences were significant. When the three irrigating solutionscompared the differences among all the groups were significant and combinationof (5.25% NaOCL and 17 % EDTA) resulted in more smear layer removal.Conclusion: In conclusion, the EndoVac irrigation system extruded significantly lessirrigant solution than both the Vibringe and needle irrigation systems. Smear layercollection was least in the apical third regarding the EndoVac irrigation systemand resulted in more Smear layer removal. And combination of NaOCL andEDTA group was more effective on smear layer removal than other two groups.


Article
In Vitro The Effect of Canals Instrumented With Three Rotary Ni-Ti Systems on The Dislocation Resistanceo Guttafusion® Versus Single Cone Obturation Technique

Authors: Rafal S. Ameen --- Raghad A. Al Hashimi
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2017 Volume: 29 Issue: 3 Pages: 17-25
Publisher: Baghdad University جامعة بغداد

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Background: Complete seal of the root canal system following its chemo-mechanical debridement plays a pivotal role for achieving successful endodontic treatment. This can be established by reducing the gaps between the core filling material and root canal wall.Aim: To assess and compare the dislocation resistance of root canals obturated with GuttaFusion® and TotalFill BC sealer versus single cone obturation technique and TotalFill BC sealer after instrumentation of the canals with WaveOne, ProTaper Next and ProTaper Universal system.Material and Method: Sixty extracted human permanent mandibular premolars were conducted in the current study. The teeth were decorated and left the root with 15mm length; the roots were divided randomly into three main groups, twenty roots in each group. The roots were instrumented with different rotary systems using crown down technique according to the groups: (Group I) was instrumented with WaveOne files. (Group II) was instrumented with ProTaper Next system and (Group III) was instrumented with ProTaper Universal system. For each group the same irrigation regimen was used, 3 mL of 5.25% sodium hypochlorite and 3 mL of 17% EDTA to remove the smear layer.Then, Group I was also subdivided randomly into two subgroups of ten samples each, (Group I A) obturated with single cone gutta-percha and (Group I B) filled with GuttaFusion®. Group II was divided into (Group II A) obturated with single cone gutta-percha and (Group II B) filled with GuttaFusion®. Group III was divided into (Group III A) obturated with single cone gutta-percha and (Group III B) obturated with GuttaFusion®. In the present study, TotalFill BC sealer was used for all the tested groups.Then, the roots were embedded in clear acrylic resin and each root sectioned into three sections of 2mm thick (apical, middle and coronal). The push-out bond strength values represented by (MPa) unit was calculated by dividing the load on the surface area and the last was measured in collaboration with AutoCAD system software program. Failure mode analysis was carried out to examine the type of failure in each sample by using a stereomicroscope.Results: The results showed highly significant differences among the main groups that instrumented with different rotary systems (WaveOne, ProTaper Next and ProTaper Universal system). There were highly significant differences between the two obturation techniques of the subgroups (single cone gutta-percha versus GuttaFusion®). However; Gutta-Fusion® showed highest bond strength value than single cone obturation technique. The coronal third slices of all groups showed highest value of bond strength in comparison to the middle thirds and apical thirds. In the meantime, the middle third slices showed bond strength higher than that of the apical thirds for all groups. Statistical analysis was performed by using two way ANOVA and LSD tests.Conclusions: The instrumentation techniques and the obturation materials significantly affected the push-out bond strength values of obturation system. The highest value was appointed in root canals instrumented with ProTaper Universal System; obturated with GuttaFusion® and BC sealer, whereas, the lowest bond strength was appeared at canals instrumented with ProTaper Next; obturated with single cone gutta-percha and BC sealer


Article
An evaluation of the sealing ability of different obturationand gutta-percha removal techniques (A ComparativeStudy)

Authors: Adel F. Ibraheem عادل فرحان ابراهيم --- Ala' M. M. Ali علاء محمد علي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: 4 Pages: 7-9
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Removing gutta-percha (GP) during post space preparation is common in dental practice. The aim ofthis study was to compare the effect of using two types of rotary instruments (peeso reamers and Core-Remover) forGP removal on the apical sealing ability of GP in three obturation techniques (lateral condensation, thermafil, andsoftcore) using dye penetration method.Materials and method: Sixty palatal roots of freshly extracted human maxillary first molars were sectioned andprepared with ProTaper manual system in crown-down manner to size F4.. Samples divided randomly into 3 groups(20 roots each) according to the method of obturation; group A: Lateral condensation, group B: Soft-Core andgroup C: Thermafil. All samples received GP removal after 7 days incubation (37˚C and 100% humidity) either usingPeeso reamer (groups A1, B1 and C1) or Core Remover (groups A2, B2 and C2) (10 roots each group). The sampleswere sealed coronally, immersed in Indian ink and incubated for a week. Roots were demineralized with a 5% nitricacid solution, cleared in methyl salicylate and examined using a stereomicroscope under 40X magnification withcalibrated grid to establish the degree of apical dye penetration in millimeters.Results: Data were collected and subjected to descriptive and inferential statistical analysis (ANOVA and t-test) andthere was no significant difference between using peeso reamer and core remover.Conclusion: Apical sealing ability of remaining GP is less affected by the technique of GP removal


Article
Efficacy of ProTaper rotary instruments in removing filling materials during root canal retreatment

Author: Dr. Hikmet A. Sh. Al-Gharrawi . B.D.S., M.Sc. د.حكمت عبد الرحيم
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2009 Volume: 6 Issue: 1 Pages: 1-7
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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The aim of the this study was to investigate the efficacy of ProTaper rotary instruments compared to hand instrumentation with Hedstrom files, with and without the use of a solvent (eucalyptol) in the retreatment of gutta-percha filled root canals. Roots of forty extracted single-rooted maxillary anterior teeth with straight root canals were utilized in this study. The root canals were prepared using step-back technique and obturated with laterally condensed gutta-percha and sealer cement. The roots randomly divided into four groups with ten specimens each. Removal of gutta-percha was performed using ProTaper and Hedstrom files, both were used with and without the solvent eucalyptol. Both, time taken to reach the working length and time taken to complete removal of gutta-percha were recorded. Statistical analysis of the collected data revealed a highly significant decrease in the working time when ProTaper was used to remove gutta-percha compared with Hedstrom files. A highly significant decrease in the working time was found when eucalyptol was used with ProTaper. No significant difference existed between the treatments using Hedstrom with or without the use of eucalyptol.

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