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Article
Evaluation of Density and Homogeneity of Three Different Root Canal Obturation Techniques: A Three –Dimensional Computed Tomography In Vitro Study

Author: Ahmed S. Mustafa
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2014 Volume: 3 Issue: 1 Pages: 17-23
Publisher: Tikrit University جامعة تكريت

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Abstract

The aim of this in vitro study was to compare three dimensionally the density and homogeneity of cold lateral compaction, warm vertical compaction and guttaflow root canal obturation techniques using computed tomography. Thirty canals of 12 mm from extracted lower single canal premolars were selected then instrumented and divided randomly into 3 groups with 10 roots in each group. Group I was obturation with cold lateral compaction technique, group II was obturated with warm vertical compaction technique and group III was obturated with guttaflow system. The specimens were then analyzed for the density and homogeneity in both vertical and horizontalsections in apical, middle and coronal third with 1 mm section thickness using computed tomography. The data obtained in hounsefield units were subjected to statistical analysis. In conclusionguttaflow was superior in the apical part and none of the tested obturation techniques can achieve three dimensional dense and homogenous obturation from apical to coronal parts of root.


Article
Postoperative pain and flare-up in one- and multiple-visits endodontic treatment for pulpally vital molars

Author: Dr.Ahmed S. Mustafa, B.D.S., M. Sc.* د. احمد صليبي مصطفى
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2008 Volume: 5 Issue: 4 Pages: 348-353
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

In recent years, one appointment endodontics has gained increased acceptance as the best treatment for most cases. The aim of this study was to analyze the incidence of post-operative pain and flare up following single-visit and multiple-visits root canal treatment in pulpally vital molars using two different instrumentation techniques. One hundred seventy seven (177) vital molars teeth from 160 patients were selected and randomly divided into two groups; first group (89) teeth were endodontically treated with multiple visits while the second group (88) teeth were endodontically treated with one visit. Each group further subdivided into two subgroups; first subgroup, canals were prepared by conventional step-back technique using hand-held stainless steel k-files and obturated with laterally condensed gutta-perch cones while the second subgroup were the canals prepared by ProTaper rotary system and obturated with laterally condensed gutta-perch cones. No significant differences in post operative pain and flare-ups between teeth that were treated in one visit and multiple visits. Also the use of the ProTaper rotary system in preparing the canals contributed to lower the incidence of post-operative pain.


Article
Indirect Digital Radiography versus Conventional Radiography for Estimation of Root Canal Length

Authors: Dr. Salah S. Mustafa, B.S.C., M.Sc., Ph.D.** صلاح مصطفى --- Dr. Ahmed S. Mustafa, B.D.S., M. Sc.* د. احمد صليبي
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2008 Volume: 5 Issue: 2 Pages: 132-136
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The aim of this study was to evaluate the accuracy of Indirect Digital Radiography (IDR) for setting working length with the aid of new software additions program. The root canal length was measured using two estimation methods: conventional D-speed film radiograph, IDR using 2 clicks, 3 clicks, 4 clicks, and 6 clicks of measuring tools. Twenty seven extracted human lower molar teeth with different canal curvatures were examined. True canal length was measured using a millimeter rule. Non-significant differences were found in canal length estimation between IDR, conventional radiograph, and true canal length, also there was non-significant difference in measurement using 2, 3, 4, or 6 clicks.

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Article
Brackets bonding failure after in-office bleaching in vivo

Authors: Dr.Amer Al-Obiedy, B.D.S., M.Sc --- Dr. Ahmed S. Mustafa B.D.S, M.Sc د.بان غانم --- Dr. Bahn Gh. Agha B.D.S, M.Sc
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2010 Volume: 7 Issue: 1 Pages: 49-56
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The aim of this in vivo study was to determine the effect of high concentration35% hydrogen peroxide bleaching agent on metallic brackets bonding failure. Fortypatients who received first orthodontic treatment phase, were included in this study.A split mouth technique was used; one arch exposed to in-office bleaching gelcontaining 35% hydrogen peroxide for 30 minutes, while the unbleached arch servedas the control. Patients were divided into four groups: First two groups, the bracketsbonded 48 hours after bleaching while the third and fourth groups, brackets bonded 3weeks after bleaching. The bracket failure was computed using independent T-test.The higher bracket failure occurs in mandibular bleached group 48 hours beforebonding (18.33%) while the lowest bracket failure occurs in unbleached groups (1.67%). Significant differences were showed in bracket failure between the mandibularbleached teeth 3 weeks before bonding and those 48 hours before bonding. AdhesiveRemnant Index scores revealed that the majority of failure in bleached teeth occurredin the enamel/resin interface. The 48 hours bleached teeth before bondingsignificantly had a high bracket failure. We should increase the time lapse betweenbleaching and bonding procedure more than 3 weeks to improve the bracket bondingstrength.


Article
Apical microleakage in root canals obturated with lateral compaction, warm vertical compaction and Gutta-Flow techniques (in vitro study)

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Abstract

The sealing ability of root canal filling materials is crucial to the goal ofpreventing reinfection via microleakage of microorganisms and their by-products.Thirty palatal canals of 12mm length from extracted upper first molars were selectedthen instrumented and divided into 3 groups. Group I was obturated with lateralcompaction technique, group II was obturated with warm vertical compactiontechnique and group III was obturated with Gutta-Flow system. Except for the apical2 mm, all other segments of roots for the 3 groups received two layers of nail varnishand immersed in a methylene blue 2% and stored at 37Cº for 30 days. Understereomicroscope liner dye leakage was measured. No statistical difference was foundbetween lateral compaction, warm vertical compaction and Gutta-Flow sealing ability.

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