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Article
The efficiency of ProTaper rotary retreatment files in the removal of two different root filling material

Author: Prof. Dr. Abdul-Karim Jassim Al-azzawi B.D.S., M.Sc. د.عبد الكريم جاسم
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2011 Volume: 8 Issue: 3 Pages: 237-241
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The ProTaper rotary retreatment files is one of the new files especially designedfor retreatment. The aim of this study is to test if root canals filled with Resilon pointsand RealSeal sealer (SybronEndo, USA) can be retreated using ProTaper rotaryretreatment files in the same manner as canals filled with gutta-percha and zinc oxideeugenol based sealer.Twenty extracted maxillary first molars with palatal roots having single straightcanal and fully formed apex were instrumented and randomly divided into two groupsof ten roots each according to the root filling material used (gutta-percha and zincoxide eugenol based sealer for group A and Resilon points and RealSeal sealer forgroup B). For all roots, removal of root filling material was done by using ProTaperrotary retreatment files (Dentsply-Maillefer, Ballaigues, Switzerland). The amount ofroot filling material remained and the time required for the removal process for allroots were recorded and statistically analyzed using SPSS version 15.The results showed that during retreatment procedures; removal of Resilon withRealSeal sealer from root canals can be achieved with ProTaper rotary retreatmentfiles but the amount of Resilon root filling material remained was more than GP andshowed a highly significant difference, it was also obvious that removal of Resilonroot filling material from root canals requires more time than roots filled with guttapercha.In conclusion, removal of resin based root filling material can be achieved withProTaper rotary retreatment files but it leaves more filling remnants and takes moretime than canals filled with gutta-percha.


Article
Evaluation of apically extruded debris by using hand and rotary Nickel-Titanium instruments

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Abstract

This study evaluated the amount of apical debris, using hand, rotary ProTaper instruments, and rotary ProFile instruments. Forty five of mandibular premolars with single root were randomly divided into three groups. The teeth in all groups were instrumented until reaching the working length, with ProFile, rotary ProTaper and hand PrpTaper instruments. Debris extruded from the apical foramen was collected into preweighed polyethylene vials and the extruded irrigant was evaporated. The weight of the dry extruded debris was established by comparing the pre-and post instrumentation weight of polyethylene vials for each group. All instruments tested produce a measurable amount of debris, a statistically significant difference was observed between ProTaper instruments and ProFile group in term of debris extrusion (P < 0.001). Although ProTaper rotary extruded a relatively higher amount of debris, no statistically significance difference was observed between this type and the ProTaper hand instruments (P > 0.05).


Article
Microleakage after root canal preparation with rotary and hand ProTaper system (in vitro study)

Authors: Dr. Iman M. Al-Zaka. د.ايمان محمد --- Dr. Hikmet A.Sh. Al-GharrawI د.حكمت عبد الرحيم --- Dr. Jamal A. Mehdi. د. جمال عزيز مهدي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2008 Volume: 5 Issue: 2 Pages: 121-126
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Seventy canals from 35 mesial roots of extracted human mandibular molars were selected and divided into 2 groups. The group I was prepared mechanically with ProTaper system. And group II was prepared with hand ProTaper files. All canals were obturated with Thermafil technique and Topseal sealer. Apical microleakage and the time for preparation were recorded in each sub group. Five molars were used as control teeth. All specimens were stored in 100% humidity, and were suspended in methylene blue dye for 72h. Linear dye leakage was statistically different (T-test), while time preparation between two groups was not statistically different.


Article
A comparison of preparing curved canals using NiTi Engine-driven and K-flexo endodontic instruments

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Abstract

The purpose of this in vitro study was to evaluate the combined effect of ProTaper file rotary instruments to K-flexo file hand instruments in curved canals in terms of instrumentation time, change in working length, and spreader penetration depth. Thirty curved mesial canals of extracted mandibular molars were used in this study, divided into two groups (15) canals for each group. In group I the canals were prepared with NiTi ProTaper file with slow speed contra angle hand piece (300rpm). In group II the canals were prepared by step-back technique with Gates-Glidden using stainless steel K-flexo hand instruments. Students't-test revealed that there was a highly significant difference between group I and group II in preparation time, and change in working length. In group II spreader penetrated significantly closer to working length than in group I.


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
A comparative study between hand and rotary protaper instruments on natural extracted teeth

Author: Farid G. Numan فريد نعمان
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 1 Pages: 6-8
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The purpose of this in-vitro study was to evaluate and compare the changes in working length andpreparation time after instrumentation with hand and rotary protaper endodontic instruments.Materials and Methods: mesial canals of thirty human mandibular first molars were used in this study. The mesialcanals were prepared alternatively till size F2 using crown-down technique with hand protaper files (group Ι) androtary protaper files (group ΙΙ). Following parameters were evaluated; changes in working length and preparationtime.Results: The results showed that all canals got loss of working length after instrumentation with hand and rotaryprotaper files, but the difference was insignificant between them. The instrumentation time was shorter for rotary thanfor hand protaper instruments.Conclusions: The preparation time with rotary protaper was faster than with hand protaper, and there in nodifferences between them in working length changes.


Article
Evaluation of Two Rotary Nickel-Titanium Systems for Gutta Percha Removal during Endodontic Retreatment

Author: Nawal A Al-Sabawi
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 25 Pages: 21-28
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The purposes of this study were to evaluate the efficacy of two rotary systems (RaCe and ProTaper) compared with hand files, in the removal of gutta percha during retreatment. Retreatment time, amount of apically extruded debris, and procedural errors were also evaluated. Materials and Methods: Forty extracted mandibular premolars were instrumented to size 30 and obturated with lat-eral condensed gutta percha. Then teeth were randomly divided into four groups, 10 teeth each. Re-moval was performing with chloroform and one of the following techniques: (I) Hedstrom and K-files, (II) Hedstrom and hand ProTaper, (III) Rotary ProTaper, and (IV) RaCe. Retreatment times, apically extruded debris, and broken instrument were recorded. The root split longitudinally viewed under ste-reomicroscope at (10 X) photograph are taken, and then the area of remaining filling material and whole area of the canal were measured using SigmaScan software. Data were analyzed statistically using one way ANOVA and Tukey test. Results: The two rotary systems left significantly less remain-ing filling material, faster, and produce less amount of apically extruded debris compared to hand files. There was no significant difference between the two rotary systems, but there was significant differ-ence between the two hand files regarding the amount of remaining filling materials. Only RaCe exhib-its no fracture instruments during retreatment. Conclusions: The two rotary systems were found to be effective and faster in removing gutta percha during endodontic retreatment.


Article
Centering ability and canal transportation of : ProTper,Mtwo,WaveOne,Reciproc in simulated curved canals (A comparative study)

Authors: Dr. Rafal M. Maruish B.D.S د.رافل --- Dr. Jamal A. Mahdi B.D.S., M.Sc د.جمال عزيز مهدي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2013 Volume: 10 Issue: 2 Pages: 147-155
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Background: this study was conducted to compare the centering ability and canaltransportation of: Protaper, Mtwo, WaveOne, Reciproc in simulated curvedcanals.Materials and methods: Eighty simulated curved canals of 40° curvature weredivided into four groups and prepared to an apical size 25 using a crown-downtechnique for ProTaper instruments and single length technique for Mtwoinstruments and single file technique for WaveOne and Reciproc instruments. Thefollowing parameters were evaluated: outer and inner canal transportation andthe centering ability. The measurements were carried out at five different levels.Pre-and postoperative images of the canals were taken at 40X magnification byaid of stereomicroscope. An assessment of the canals shape was determined usingPhotoshop CS2 and AutoCAD software. The data were analyzed statistically usingANOVA and LSD test.Results: Considering canal transportation, the direction of transportation of rotaryNiTi instruments was usually toward the inner aspect at middle parts of the canaland toward the outer aspect of the curve at the apex of curve and the end ofpreparation. Waveone and Reciproc files were showed a better maintaining itsoriginal curvature with less straightening and transportation especially at the endof preparation of simulated canals. WaveOne and Reciproc instruments obtainedbetter centering ability at all levels especially at the end point of preparationcomparing with Protaper and Mtwo instruments.Conclusions: WaveOne and Reciproc instruments maintained the original curvaturesignificantly better than ProTaper and Mtwo.


Article
Evaluation of the Efficiency of Three Different Obturation Techniques to Obturate the Isthmus Area of Roots Canals Prepared by Two Different Instrumentation Techniques (An In Vitro Study)

Authors: Hasan M. Al-Rammahi حسن الرماحي --- Hussain F. Al-Huwaizi حسين فيصل الحويزي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2016 Volume: 28 Issue: 2 Pages: 14-18
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The isthmus is a difficult area in the root canal complex to manage. The research aimed to evaluatethe efficiency of three different obturation techniques (lateral condensation, EandQ (thermoplasticized guttapercha system) and Soft Core (thermoplasticized core carrier gutta percha system)) to obturate the isthmus area ofroots prepared by two different instrumentation techniques (rotary ProTaper universal and ProTaper Next systems).Material and method: Sixty freshly extracted teeth were randomly divided into two main groups (A and B) of 30 teetheach. Group A was prepared by rotary ProTaper Universal whereas group B was prepared by ProTaper Next system.Each main group was then randomly subdivided into three subgroups of 10 teeth each, to be obturated with thethree obturation techniques. All specimens were then placed in cold cure acrylic mold just from the side of thecrown leaving the root unmolded to facilitate the sectioning process, then three sections were obtained from eachspecimen by using microtome at 2, 6 and 10 mm from the apex. Each section was viewed understereomicroscope(40X) and imaged with digital camera(4X). Each image was managed with image J program tocalculate the surface area of the whole isthmus and that of the gutta percha and/or sealer extended into theisthmus so the collected data represented the percentage of extension degree of gutta percha and /or sealer intothe isthmus(EDGS).Results: The highest mean value of (EDGS) was evident with Soft Core technique in the apical area and wassignificantly higher than that of the EandQ and lateral condensation techniques.Conclusion: Under the conditions of this study, Soft Core system showed a higher efficiency in obturating the isthmusarea than the other obturation techniques


Article
Evaluation of The Cleaning Effciency of Oneshape, Waveone, Reciproc and Protaper Systems Using Digital Image Morphometric Analysis (An in vitro study)

Authors: Luma A. Al-Dulaimi --- Hikmet A. Al-Gharrawi
Journal: Journal of Oral and Dental Research مجلة طب الفم والاسنان ISSN: 23106417 Year: 2017 Volume: 4 Issue: 2 Pages: 169-183
Publisher: Iraqi Association for Oral Research الجمعية العراقية لبحوث طب الفم

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Abstract

Background Complete removal of debris during the process of root canal therapy is of paramount importance in order to achieve the objectives of endodontic treatment.Objectives This in vitro study was conducted to compare the effciency of four different rotary instrumentation systems in removing dentin debris at three levels of root canals. Materials and methods Sixty freshly extracted human mandibular premolar with single straight root canals were selected and randomly divided into four groups of fهfteen teeth each; Group I: prepared by rotary ProTaper system (Full rotary technique), Group II: prepared by single fle Reciproc system (Reciprocating technique), Group III: was prepared by single fle WaveOne system (Reciprocating technique), and Group IV: was prepared by single fle OneShape system (Full rotary technique). These groups were prepared to an apical preparation corresponding to size 25 K-fle. Sodium hypochlorite (3%) was used as an irrigant in all cases. After canals preparation, the roots were split longitudinally and photographed with a professional digital camera. The images of root sections were then magnifed to 100x and the percentage of remaining dentin debris was calculated for the apical (0-3 mm), middle (3-6 mm) and coronal (6-9 mm) levels through dividing the pixels occupied by debris at each level by the total pixels representing the entire area of the canal using Adobe Photoshop CS6. Data were analyzed statistically using ANOVA and LSD tests. Results Reciproc, WaveOne and OneShape systems showed signifcantly better cleaning effciency than Protaper system in the apical and coronal levels (p < 0.05). While in the middle level, no signifcant differences were obtained among all systems (p ≤ 0.05).Conclusion Under the conditions of this study, the use of OneShape, WaveOne and Reciproc systems was signifcantly more effective than ProTaper system in eliminating debris from root canals at all levels.

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