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Article
The incidence of posttreatment pain using two different intracanal medicaments

Author: Dr. Iman M. Al-Zaka. B.D.S, M.Sc. د. ايمان محمد
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2007 Volume: 4 Issue: 2 Pages: 110-116
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

AbstractThe purpose of this study was to compare the incidence of posttreatment pain to two medicaments placed in the root canal system. One hundred teeth belonging to 100 patients were included in this study. All teeth under went conventional root canal, which involved the instrumentation to the apices of each canal at the first visit. Canals were instrumented using a step-back technique and hand-files along with irrigant. The canals were dried and one of the following two medicaments was inserted into the canal: group I: Chlorhexidine- containing gutta-percha point; group II Calcium hydroxide- containing gutta-percha point. All teeth were temporized with intermediate restorative material. Patients' assessed posttreatment pain up to 48 hours as none, mild, moderate, or sever. The pain levels in each test group at each time period were compared statistically with Chi-square test, a significant difference was found in posttreatment pain between the two groups at 4h and 24h. No significant difference in posttreatment at 48h.


Article
The effects of canal preparation by different NiTi rotary instruments and reciprocating WaveOne file on the incidence of dentinal defects

Author: Dr. Iman M. Al-Zaka, B.D.S., M.Sc د. ايمان محمد الزقى
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2012 Volume: 9 Issue: 2 Pages: 137-142
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The purpose of this study was to compare dentinal defect formation while usinghand files (HFs), two brands of nickel-titanium (NiTi) rotary files and the WaveOnefile. Eighty mandibular first molars were selected and divided into 4 groups. Hand file(HFs), WaveOne reciprocating file (WO), EndoSequence file (ES), ProTaper file(PT), were used to prepare the 2 mesial canals. Roots were then sectioned 3, 6, and 9mm from the apex, and the cut surface was observed under a microscope and checkedfor the presence of dentinal defects. HF group showed the lowest percentages ofdentinal defects (5%). In roots prepared with the WO, ES, and PT, dentinal defectswere observed in 25%, 10%, and 50% of teeth, respectively. There was a significantdifference between HFs group and both of WO group and PT group (P <0.05).However, no significant difference was found between HFs group and ES group (P ≥0.05). Also a non significant difference was found between WO group and ES group(P ≥ 0.05). All rotary files created defects in the root dentin, whereas handinstrumentation presented with satisfactory results.


Article
Evaluation of the amount of apically extruded debris using different root canal instrumentation systems

Authors: Dr. Iman M. Al-Zaka, B.D.S., M.Sc د. ايمان محمد الزقة --- Dr. Hashim M. Hussein, B.D.S. د.هاشم حسن
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2014 Volume: 11 Issue: 1 Pages: 1-10
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The purpose of this study was to evaluate the amount of apically extruded debrisusing 5 types of nickel–titanium endodontic instruments (Hand ProTaper, RotaryProTaper, Rotary Mtwo, RECIPROC and WaveOne). Seventy-five freshly extractedmandibular premolar teeth were used in this study. All teeth were shortened to alength of 14mm. The specimens were randomly divided into five groups (each groupcontaining 15 samples) according to the type of instrumentation systems used. GroupI: instrumented by hand ProTaper system (Hand technique). Group II: instrumentedby rotary ProTaper system. Group III: instrumented by rotary Mtwo system. Group1V: instrumented by single file RECIPROC system. Group V: instrumented by singlefile WaveOne system. Debris extruded from the apical foramen was collected intopre-weighed glass vials. The difference between the weights of vial (pre-weight andpost-weight) represented the weight of debris extruded from apical foramen duringcanal preparation. The results showed that all groups induced extrusion of debris,Mtwo group (III) has statistically the lowest mean value of apically extruded debris incomparing with all other groups, followed by rotary ProTaper (II), hand ProTaper (I),and WaveOne (V) groups respectively. While the RECIPROC group (IV) hasstatistically highest mean value.


Article
The Incidence of dentinal root defects caused by different Nickel Titanium instruments

Authors: Dr. Iman M. Al-Zaka, B.D.S., M.Sc د. ايمان محمد الزقة --- Dr. Noor Aldiin A. Saieed B.D.S د. نور علاء الدين سعيد
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2015 Volume: 12 Issue: 1 Pages: 1-9
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The aim of this in vitro study was to compare the effect of different NickelTitanium instruments on the root dentin in term of dentinal defects. Seventy-fivepalatal roots of maxillary first molars teeth were selected for the study. Fifteen rootswere left unprepared to serve as a negative control group; the remaining 60 roots weredivided into four tested groups. Group (I) prepared using ProTaper Universal, group(II) prepared by EndoSequence, Group (III) prepared by ProTaper Next and finallygroup (IV) prepared by RECIPROC systems. After preparation the roots wereembedded in clear acrylic and then sectioned at different levels (apical, middle andcoronally) and examined under Stereomicroscope. Results: No cracks were observedin the negative control group, while dentinal defects were observed in roots preparedwith ProTaper Universal, EndoSequence, ProTaper Next and RECIPROC systems(28.88%, 8.89%, 11.11% and 33.33% respectively). The results showed a nonsignificantdifference between EndoSequence and Protaper Next groups and betweenProTpaer Universal and RECIPROC groups (p > 0.05), ProTaper had a significantdifference with EndoSequence and ProTaper Next groups (P < 0.05) While TheRECIPROC group had a highly significant difference with EndoSequence andProTaper Next groups (P < 0.01). Conclusion, all instrumentation systems used in thisstudy created cracks in the root dentin. The EndoSequence and ProTaper Nextinstruments tended to cause least dentinal cracks compared with the ProTaperUniversal and RECIPROC instruments


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 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
Urinary Mercury concentrations associated chewing gum in students of Faculty of Dentistry

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Abstract

The aim of this study was to measure the urinary mercury concentration instudents after chewing gum for certain period of time. Sixteen students from facultyof dentistry had used chewing gum for five hours a day for seven days. Urine samplecollected 24 h before and after the experimental time. Total mercury in urine (U-Hg)was determined by means of inductively coupled plasma mass spectrometry (ICPMS).t-test was used for the comparison of mercury before and after chewing gum. Anon significant difference was found after chewing than before chewing gum.


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

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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.

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