research centers


Search results: Found 10

Listing 1 - 10 of 10
Sort by

Article
Evaluation of Apical Microleakage of Endodontically Treated Teeth Sealed With Three Different Root Canal Sealers

Authors: Omar S. Rahawi --- Manaf B. Ahmed --- Sabah A. Ismail
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2019 Volume: 19 Issue: 1 Pages: 11-19
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Different materials are used during endodontically treating of teeth as root canal sealers. Thus, this study was done to evaluate the sealing ability of three different types of root canal sealers on the apical part of the tooth. Materials and Methods: 50 sound human teeth were instrumented by using a rotary ProTaper nickel-titanium files under crown down technique. The samples were divided randomly into 3 groups (n=10), additionally two groups were used as +ve controls, first group usedEndofill sealer (PD product dentairesSA,Switzerland), and group two used Tagadseal sealer (technical general United kingdom),and the third group used AH plus sealer (Dentsply, Switzerland). All teeth were obturated using the single cone technique with the sealers, then the whole root surface was coated with two layers of aspecial type of nail varnish, except the apical 1 mm, then all teeth were placed into 2 % methylene blue dye liquid for one week at 37o C. After that they were removed from the dye , the nail varnish was removed. The positive controls (n=10) were left unfilled and coated as described earlier. Then the tooth was splited longitudinally and each half examined under a stereomicroscope with magnification: 10 X. A computer software was ued taken by a digital camera. Analyzing of data was done by One-Way Anova and Duncan,s Test analysis among the means of microleakage of the three types of sealers. All tests were computed at 5% significance level.Results: showed statistically significant difference among groups. Group 3 (AH plus) showed abtter seal among ( Tg and Endofill) groups while Tg and Endofill showed no significant difference between both. Conclusions: Under the conditions of this study, the AH plus sealer provided a better sealing ability than Endofill and Tagadseal sealers, but long term in vivo study is important to prove it

الاهذاف: رقََم اوواع عدح مه موادالزثجَذ للاسىبن المبلدخ لجَاب ثبسازاداا المجااد اكلزنا واٌ لزىاَان القىاواد لغبٍاخ ماه الدساساخ لمةاااخ اً ماه ساه حاحَخ خابلٌ ماه الزتاوهبد الابقَاخ ثةاد 05 المثجزبد هواكاضل اكقل رساٍت خبسج الذس ح. المواد وطرائق العمل: اسازادمذ الدساساخ مدبمَع عتوائَخ المدموعاخ 3قطع الزبج ثبسزاداا القبطع النهاثبئٌ ثةد المةبٍىخ الىااٍخ اٍضب ثبسزاداا اشةخ اكس خمَع اكسىبن قسمذ الي اك لي اكقىَخ مبئذ ثبسازاداا اكواد اَل ساَباالمدموعخ الثبوَاخ اسازادمذ رَداٌ ساَباالمدموعخ الثبلثاخ اسازادمذ اٍابج ساَباكل اكقىَاخ ا بقاذ ثبلتانل الماا طااٌ اكيابدً ثةاادهب كاال الداذ سرم طلائهااب ثبساازاداا حاجن اكةباامبعاادا وهبٍااخ الاذس ح ثةاادهب ماوب كاال الىمابجج ثساابئل المثبااَه اكزسق لمدح اسجوع كبمل ثةدهب وجدا ثبزالخ حجن اكةباا وجادا ثقاا الداذ سطولَب وجادل عمبَاخ الححاا رحاذ المَناسانوة ثبسازاداا النابمَاح الاقمَخ مه ثم رحبَل الىزبئح ثبسزاداا محبل الىزبئح: النتائج :اةهاد الىزبئح هوالمثجذ اكقل رساٍت مه اكوواع اكخاى AH


Article
The biocompatibility and antibacterial action of three endodontic sealers

Authors: Ali M. Abdul Kareem علي عبد الكريم --- Walid Al-Hashimi وليد الهاشمي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2005 Volume: 17 Issue: 1 Pages: 18-23
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: Root canal sealers are regularly used in root canal fillings. Bacteria can multiply and grow inside the root canal system.Materials and Methods: Twelve albino rabbits were used for the implantation of the sealer materials inside the S.C. tissue of the animals for 3, 14 and 28 days for determination of tissue reaction. A Muller-Hinton culture medium was used for culturing the bacterial swabs for 24 and 48 hours at 370.Results: The ZOE sealer showed the severest inflammatory reaction initially, and all the sealer materials revealed good tendency for tissue healing after 28 days. The Dorifil sealer exhibited the highest antibacterial action against all the microorganisms tested.Conclusion: The endodontic sealers used in this study showed different types and severity of inflammatory reaction with good tendency for healing. All the sealer material tested had antibacterial actio against the bacteria but with different capacities.


Article
The solubility of a zinc oxide eugenol root canal sealer (Endofil) in normal saline solution at different time intervals

Authors: Suhad J. Hemed سهاد حمد --- Waleed M. Khalil وليد خليل --- Saif Al Arab A. Mohammed سيف العرب محمد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2005 Volume: 17 Issue: 3 Pages: 4-7
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: The solubility of the root canal sealers is undesirable, because the process of dissolution may result in gaps and voids along the sealer-dentine or sealer-gutta percha interface. The aim of this study was to assess the solubility of zinc oxide based sealer (Endofil) in normal saline solution at different time intervals.Materials and methods: Fifty standardized plastic ring moulds were constructed and filled with Endofil sealer. The specimens were allowed to dry for 24h then weighed to the nearest 0.0001g .The samples were divided randomly into 5 groups and immersed in normal saline solution for 1,7,14,28 and 56 days. The samples were removed from the solution after completing the specified immersion period and allowed to dry for 24h. Then they were weighed, the percentage weight loss was then determined.Results: The percentage weight loss was less that 3% for immersion periods not exceeding 14 days and increased up to 5.4% for the 56 days. The statistical analysis of the results revealed a non significant difference between 1 and 7 days immersion time groups, while the differences between other groups were statistically significant.Conclusion: Under the conditions of the present study, the Endofil sealer met the International Standard ISO requirement for at least 14 days. The solubility rate of the sealer increased gradually from the first day till the 56 th days, but it remained within the acceptable limits for only 14 days.


Article
In vitro study to compare the sealing ability of a hydroxyapatite endodontic sealer with other Sealers (Quantitative Measurement)

Authors: Raghad A MOHAMMED --- Majidah K AL-HASHIMI
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2001 Volume: 1 Issue: 3 Pages: S247-S256
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

This study is designed to compare and evaluate the sealing ability of a new Iraqi hydroxyapatite-containing endodontic sealer and other sealers using spectrophotometric system as a quantitative measurement of the volume of dye penetration into root canals. Fifty single-rooted extracted human teeth were used.Step-back technique was used to flare and enlarge the canals, the teeth were divided into five groups according to the type of sealer used: Group I:Zincoxideeugenol cement sealer, Group II: ZOE + hydroxyapatite (Iraqi), Group III: Glass ionomer cement sealer, Group IV: GIC + hydroxyapatite (Iraqi), Group V: Calcium phosphate cement + zincoxide(Wach's cement).All groups were immersed in methylene blue dye for one week then dissolved in 50% nitric acid and filtered then centrifuged. The leakage was assessed quantitatively using a spectrophotometric system. The results showed that calcium phosphate cement + zincoxide,(Wach's cement) had the lowest mean of dye leakage, followed by glass ionomercement sealer, then glass ionomer cement Sealer + hydroxyapatite, while ZOE had the highest mean of dye penetration into the filled root canal, The newly developed Iraqi hydroxyapatite containing endodontic sealer was as effective as the other tested sealers concerning apical microleakage.


Article
The effect of smear layer on push-out bond strength to dentin of Bioceramic sealer (In vitro study)

Authors: Hamid Abbas Hamid --- Abdul-kareem Jassim Al-Azzawi
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 4 Pages: 5-11
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: Sealers should demonstrate adhesive properties to dentin, decreasing the chance of endodontictreatment failure. Increased adhesive properties to dentin may lead to greater strength of the restored tooth, whichmay provide greater resistance to tooth fracture and clinical longevity of an endodontically treated tooth. The aimof this study was to evaluate the shear bond strength of Bioceramic iRoot SP sealer, AH plus sealer and Apexit plussealer in absence or presence of smear layer using push out bond strength test.Materials and Methods: Sixty straight single roots of the mandibular premolars were selected for this study. All canalswere instrumented using ProTaper rotary instruments to achieve tapered canal walls, instrumentation was done withcopious irrigation of 5.25% sodium hypochlorite. Roots were randomly divided into three groups according to thetype of sealer used (twenty teeth for each group): Group A: Apexit plus + gutta percha, Group B: AH plus sealer +gutta percha, Group C: iRoot SP sealer + gutta percha .Then groups were subdivided according to types of finalirrigation into two subgroups. Groups (A1, B1, and C1) were irrigated with 5 ml of 5.25% NaOCl for 1 minute whileGroups (A2, B2, and C2), the smear layer was removed with 5 ml of 17% EDTA for 1 minute. All groups were rinsed withdistilled water and then obturated with cold lateral condensation technique, the roots then stored in moistenvironment at 37°C for one week. The roots were embedded in clear acrylic resin and three horizontal sectionswere prepared at a thickness of 1 mm ±0.1 in the apical, middle and coronal parts of each root. The test specimenswere subjected to the push-out test method using a Universal Test Machine that carried 1-mm, 0.5- mm and 0.3-mmplungers for coronal, middle and apical specimens, respectively. The loading speed was 0.5 mm/ min. The computershowed the higher bond force before dislodgment of the filling material. These forces were divided by the surfacearea to obtain the bond strength in MPa.Results: The results showed that the bond strengths of iRoot SP and AH Plus were significantly higher than those ofApexit plus, but there was no significant difference between the bond strength of iRoot SP and AH Plus.In terms ofroot segments, the bond strengths in the middle specimens and the apical specimens were higher compared withthe bond strengths in the coronal specimens.Conclusion: The presence or absence of smear layer did not significantly affect the bond strength of Bioceramicfilling materials


Article
The effect of different root canal irrigants on the sealing ability of Bioceramic sealer.

Loading...
Loading...
Abstract

The aim of this study was to investigate the effect of different irrigants (EDTA,MTAD, CHX) on the sealing ability of new Bioceramic root canal sealer. Materialand methods: A total of sixty extracted human single-rooted premolar teeth wereused. After instrumentation, teeth were randomly divided into three main groups(n=20) according to the type of final irrigants used. In group (A) 17% EDTA wasused. Group (B) irrigants was MTAD. In group (C) irrigant was 2% CHX. Each maingroup further subdivided into two subgroup (n=10) according to the type of sealerused. Subgroup (1) canals obturated with Bioceramic sealer. In subgroup (2) canalsobturated with AH plus sealer. After incubation period for one week the roots wereplaced in 2% methylene blue dye and kept in incubator for 48 hours then the rootswere cleared, dye penetration measured by stereomicroscopic. Results: statisticalsignificant difference was found between groups (p<0.001). In subgroup (1) BC sealer& CHX showed the lowest mean of leakage in comparing to other type of irrigantswith highly significance difference with BC sealer & EDTA. In subgroup (2) AH Plus& EDTA showed the lowest mean of apical leakage. A highly significance differenceswas found between subgroup (1) and subgroup (2) for all type of irrigants.(p<0.001).Conclusion: when Bioceramic sealer is used in obturation of root canalsystem, it is better to use it in combination with CHX irrigant to improve the apicalseal.Keywords: Endosequence bioceramic sealer, irrigants, apical leakage.


Article
Push-out bond strength of different root canal obturation materials

Authors: Sundus H. Naser سندس ناصر --- Iman M. Al-Zaka
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 1 Pages: 14-20
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: The aim of this study was to evaluate the push-out bond strength of four different obturation materialsto intraradicular dentin and to determine the failure mode.Materials and method: forty straight palatal roots of the maxillary first molars teeth were used in this study, the rootswere instrumented using crown down technique and rotary EndoSequence system, the roots were randomly dividedinto four groups according to the materials used for obturation (n=10).Group (1): AH Plus sealer and gutta-percha.Group (2): Activ GP glass ionomer sealer and Activ GP gutta-percha (Activ GP system). Group (3): Bioceramic sealerand Bioceramic gutta-percha. Group (4): GuttaFlow2 sealer and gutta-percha. For all groups single cone obturationtechnique was used. After incubation period of one week, the roots were embedded in clear acrylic resin and eachroot sectioned into three levels apical, middle and cervical. The bond strength was measured using computerizeduniversal testing machine, each section fixed in the machine so that the load applied from apical to coronaldirection at 0.5mm/min speed and the computer drew curve to show the higher bond force before dislodgment ofthe filling material. After de-bonding each sample was examined under Stereomicroscopic and the type of failuremode was recorded.Results: showed a non significant difference between AH plus group and Bioceramic group. AH Plus group showed avery highly significant difference with Activ GP group and a highly significant difference with GuttaFlow2 group.There were significant differences between coronal level and both apical and middle levels with no significantdifferences between apical and middle levels within each group.Conclusion: AH plus group showed the highest mean of bond strength in comparing to other tested groups


Article
An evaluation of the use different techniques of the thermoplasticized obturators on the coronal seal

Authors: Mervat M. Al-Bakri ميرفت البكري --- Hussain F. Al-Huwaizi حسين فيصل الحويزي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 18-20
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: The aim of the present study was to evaluate coronal leakage of root canals obturated by varioustechniques.Methodology: Straight single rooted teeth with mature apices (6 groups of 10 teeth each). Root canals wereprepared according to the crown down technique using hand ProTaper system. Endofill root canal sealer and 2.5%sodium hypochlorite was used. Root canals were obturated using cold lateral condensation Thermafil and Soft Coreobturation after root canal filling the six groups was divided into two individual groups of 30 teeth. The first group of 30teeth was kept for 1 week the second 3 week at 37 oC. Teeth were immersed in india ink. Each was split andsectioned longitudinally and the maximum extent of leakage was measured using a stereomicroscopeResults: Leakage occurred whatever filling technique was used the number of teeth with gross leakage decreasedwith time up to 3 weeks. There were significant differences in coronal leakage between the various obturationtechniques after 1 week, and after 3 weeks. No statistically significant differences were found between soft-Core andcold lateral condensation after 1 week and statistically significant differences were found after 3 weeks. There werestatistically significant differences between Thermafil and lateral condensation after 1 week and no statisticallysignificant differences after 3 weeks.Conclusion: Under the conditions of the present study none of the gutta-percha obturation techniques preventedcoronal leakage. Coronal leakage increased during the first week for CLC, Thermafil and Soft-Core obturators, anddecreased after 3 weeks. Coronal leakage in the Soft-Core obturators was higher than Thermafil and CLC after oneweek. Thermafil coronal leakage was lower than others after one week. Coronal leakage in the Soft-Core obturatorshigher than Thermafil and CLC after three weeks coronal leakage was equal in Thermafil and CLC after three weeks


Article
An Evaluation of the Solubility of Four Endodontic Sealers in Different Solvents (An In Vitro Study)

Authors: Noor Hayder Fadhil نور حيدر فاضل --- Majida K. Al-Hashimi
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2015 Volume: 27 Issue: 4 Pages: 15-20
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: Complete removal of filling material from the root canal is an essential requirement for endodonticretreatment. The purpose of the present study is to evaluate and compare the dissolving capabilities of varioussolvents (Xylene, Eugenate Desobturator, Eucalyptol, EDTA and Distilled water (as a control)) on four different typesof sealer (Endofill, Apexit Plus, AH Plus and EndoSequence bioceramic sealer).Materials and method: Eighty samples of each sealer were prepared according to the manufacturers' instructionsand then divided into ten groups (of 8 samples) for immersion in the respective solvents for 2 and 5 min immersionperiods. Each sealer specimen was weighed to obtain its initial mass. The specimens were immersed in the testedsolvents for 2 and 5 min, followed by rinsing with double distilled water and blotted dry with an absorbent paper,then they were reweighed to determine its final mass. The mean of weight loss was determined for each material ineach solvent during the specified immersion period, and the values were subjected to statistical analysis.Results: Clear differences were shown in the solubility profile of these root canal sealers in the tested solvents. Theresult of the present study shows that Xylene had the greatest capacity for dissolving Endofill, Apexit Plus and AH Plus.Eugenate Desobturator, Eucalyptol and EDTA showed a highly significant dissolving capability on these sealers withvariations between these subgroups; EndoSequence BC sealer is insoluble in these tested solvents. Regarding theimmersion time, higher values of solubility were obtained at 5 min than that at 2 min immersion time.Conclusion: The results showed that Xylene, Eugenate Desobturator, Eucalyptol and EDTA can be used for theremoval of Endofill, Apexit Plus and AH Plus during endodontic retreatment with variations between these subgroups;D.W (control group) showed the least capacity for dissolving these sealers. EndoSequence BC sealer is insoluble inthe tested solvents


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

Loading...
Loading...
Abstract

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

Listing 1 - 10 of 10
Sort by
Narrow your search

Resource type

article (10)


Language

English (10)


Year
From To Submit

2019 (1)

2017 (1)

2015 (1)

2013 (3)

2012 (1)

More...