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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
A comparison of apical sealing and extrusion between Thermafil and Lateral condensation techniques

Author: Dr. Jamal A. Mahdi, B.D.S., M.Sc. (Assistant Prof.) د. جمال عزيز مهدي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2006 Volume: 3 Issue: 3 Pages: 216-223
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

One hundred Thirty two canals from 66 mesial roots of extracted humanmandibular molars were instrumented with Protaper and K-file crown-down techniqueand divided into two groups. The group I was obturated with Thermafil technique andgroup II was obturated with lateral condensation technique. Topseal sealer was usedin both groups. Apical extrusion, apical microleakage, time for instrumentation andtime for obturation were recorded in each sub group. Six molars were used as controlteeth. All specimens were stored in 100% humidity for 1 week, coated with nailpolish, except for the apical 2mm, and were suspended in methylene blue dye for 72h.Linear dye leakage was statistically different (ANOVA) test, while apical extrusionbetween techniques was not statistically different (Chi-square test).


Article
Evaluation the effect of different instrumentation and obturation techniques on apical microleakage . (In vitro comparative study)

Authors: Dr. Lanja A.Ali B.D.S, M.Sc. د. لانجا علي --- Dr. Ihsan N. Kaka B.D.S, M.Sc. د. احسان نافع كاكا
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2013 Volume: 10 Issue: 2 Pages: 200-209
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

This in vitro study evaluated and compared the apical sealing ability of twoobturation techniques and two type of instrumentation. A total of 120 teeth werecollected randomly divided into two groups 60 roots prepared using hand protaper,other 60 roots prepared using rotary protaper .Each group was subdivided randomlyinto two obturation groups of 30 roots for each; in group A- obtura II was used ,andin group B-thermafill (TF) was used. Then the samples in all groups left for a week atroom temperature. After coronal sealing, all surfaces of the root covered with threelayer of nail polish except the apical 2mm, then each sample immersed in 10% blackIndian ink dye for 72 hours .After that the samples rinsed and nail polish removed.then samples cleared & decalcified.Data had been collected from independentexaminers and statistically analyzed using student t-test. The stereomicroscopicresults showed that there was highly significant difference between hand and rotaryinstrumentation, with in favor of rotary instrumentation technique. Concerning theobturation techniques, Thermafill showed best apical sealing followed by Obtura II;however, the differences were not significant.


Article
Evaluation of the Apical Seal in Root Canals Prepared with Rotary ProTaper Files and Obturated by Different Methods

Authors: Raghad A Al-Askary --- Wiaam M O Al-Ashou --- Sabah A Ismail
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: 18 Pages: 390-396
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 of matched-taper Single-cone, Thermafil, and Cold lateral condensation obturations. Materials and Methods: Thirty-six ex-tracted human lower canine teeth were instrumented to size (F3) with ProTaper rotary instruments after cutting of their crowns to the cement-enamel junction CEJ. The working length was determined for each tooth. The teeth were divided into (3) groups (10) of each and (6) teeth were used as a positive and negative control groups. The teeth were obturated with matched-taper Single-cone, Thermafil, and lateral condensation techniques. Tgadseal was used as a root sealer in this study. A die penetration method was used to evaluate the apical seal using a stereomicroscope at 40X magnification. One-way analysis of variance and Duncan's tests were used for statistical analysis. Results: The statistical anal-ysis of the results demonstrated that there was no statistically significant difference in microleakage between the lateral condensation and Thermafil groups. The matched taper single cone showed the least microleakage with a significant difference than the other two groups. Conclusions: The apical sealing ability of Matched-taper Single-cone obturation was better than the lateral condensation and Thermafil techniques when the root canal was prepared using a ProTaper rotary instrumentation.


Article
Apical microleakage evaluation of three different root canal Obturation techniques using dye penetration evaluation method

Author: Dr. Dara H. Saeed B.D.S, M.Sc., PhD. د.دارا سعد
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2013 Volume: 10 Issue: 2 Pages: 176-183
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Background and objectives: The aim of root canal obturation in endodontictreatment is to prevent communication between the oral cavity and periapicaltissues. Several techniques had been introduced to achieve complete filling of theroot canal system. It had been noted that more researches are needed to establishstandard techniques of root canal filling, and all the techniques should becompared for filling root canals. The aim of this study was to compare the apicalsealing ability of three different obturation techniques.Methods: Thirty single rooted teeth were collected and randomly divided into threegroups. There were 10 teeth in each group. The teeth were obturated by guttapercha as follows: Groups 1 with Thermafil, Groups 2 with Soft core, and Groups3 with System B. The apical leakage in these groups was evaluated using a dyepenetration method.Results: The lowest mean rank of leakage was observed for system B and the highestwas observed for the thermafil groups. The difference between Thermafil, softcore and system B was statistically not significant by using Kruskal Wallis test.Conclusion: System B obturation technique show less microleakage than soft coreand thermafil techniques although the differences was not significant.

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