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A Comparison between Er,Cr:YSGG 2780 nm Laser and Carbide Fissure Bur in Root-End resection
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Aim: The Aim of the study is to compare between Er,Cr:YSGG 2780 nm laser and carbide fissure bur in root-end resection regarding the morphological variations, temperature changes and the duration of resection process.

Settings and Design: 5 W, 25 Hz, 50% water, 80% air,25.47 J/cm2 .

Material and method: twenty-one extracted single rooted teeth endodontically were treated, twenty teeth were obturated and divided into two groups according to method of resection. Group 1 root-end resected using cross cut carbide bur while group 2 root-end resected using laser with MGG6 sapphire tip of 600 μm diameter. Temperature on external root surface and duration of resection were recorded. The remaining tooth served as control. Samples were prepared for SEM and examined to evaluate dentinal cracks, cemental damage, roughness, filling material-root canal wall interface.

Statistical Analysis: whenever required, x2 test/Fisher exact and Kruskal–Wallis test were used.

Results: laser result in intradentin cracks in 70% of samples while bur cause intradentin crack in 30% of samples. There was no significant difference between group 1 and 2 regarding the percentage of complete and incomplete cracks. Resection with bur resulted in cemental damage in 70% of samples while resection with laser didn’t result in cemental damage in any of the samples .Evaluation of surface roughness revealed statistically significant difference (P ≤ 0.05). The difference in duration of resection was statistically significant while in recorded temperature was not significant.

Conclusion: Er,Cr:YSGG laser showed higher percentage of intradentinal cracks, no cemental damage, larger gap area ,rougher surface and longer time for resection than bur .There is no elevation of temperature on external root surface.

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Publication Date
Fri Feb 08 2019
Journal Name
Journal Of The College Of Education For Women
Digital Literacy at The University
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The revolution of technology in the 21st century has changed radically the
climate of opinion concerning second language education. In order to excel in
today’s world, teachers and learners need to adopt new roles and be equipped with
new skills and competencies that go beyond the basic ones of listening, speaking,
reading, and writing; skills that cannot be gained if teachers teach mere academic
subjects, and students are evaluated on how well they have learnt the minute sub
skills in those content areas.
This session will touch upon several skills which may be considered the
new basics of the 21st century. Among these skills are: autonomy, active learning,
critical thinking, cooperative learning, and digita

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Publication Date
Sat Feb 28 2026
Journal Name
Journal Of The College Of Languages
الاحتجاج في الادب العبري
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Publication Date
Wed Feb 06 2019
Journal Name
Journal Of The College Of Education For Women
الحرب الاھلیة في سیرالیون
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The civil war in Seralion is considered as complex model of internal
conflicts in Africa because link to crises have relation to political, economical ,
social and cultural conditions, which were infected by disability and paralysis
in function performance, and what have effect on Seralion's relation
internationally or regionally.
In this research discussed three parts, the first is the factors of rise civil
war in Seralion , the second indicated the effected determiners in civil war in
Seralion , the third shown the factors of put end to civil war in Seralion .
The research concluded to significant reality that civil war in Seralion had
strategic effects on regional or international relations .

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Publication Date
Thu Mar 01 2007
Journal Name
Journal Of Accounting And Financial Studies ( Jafs )
إستراتيجية الرقابة في العراق
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تحتل الرقابة المالية والإدارية أهمية كبيرة في عمل المؤسسات وتمثل المرحلة الإشرافية فيها وتُعد من أهم عناصر العملية الإدارية، ويأتي دور الأجهزة الرقابية لضمان تقديم الخدمات للمواطنين، بأسرع وقت، وبأقل جهد وتكلفة. واعتمدت الدولة العراقية منذ تأسيسها على جهاز رقابي خارجي واحد هو ديوان مراقب الحسابات العام المؤسس بالقانون رقم (17) لعام 1927 الذي كان يمارس أعمال الرقابة والتدقيق المالي والحسابي للمصروفات والإير

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Publication Date
Sun Jul 02 2006
Journal Name
Political Sciences Journal
التعددية السياسية في السنغال
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التعددية السياسية في السنغال

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Publication Date
Wed Jan 27 2016
Journal Name
المجلة السياسية والدولية
مقدمة في البحث العلمي
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دراسة أصول البحث العلمي ومناهجه وتطبيقاته في العلوم الإنسانية

Publication Date
Mon Sep 25 2023
Journal Name
Arab Science Heritage Journal
المرأة في الشعر الجاهلي
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          This study is concerned with providing an objective, artistic study of the role of women in the pre-Islamic era, and extracting that status from the most important sources that express the language of that era, which is pre-Islamic poetry. The role of women in contemporary societies, the study sought to clarify those goals from a technical and objective point of view, which contributed to the main purpose of the study, which is the status of women in pre-Islamic poetry. The role of women in pre-Islamic society, and how to describe them in rhetorical sentences in poetry. The study was based on the descriptive analytical approach, which is represented by the use of content analysis, wh

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Publication Date
Sun Dec 02 2007
Journal Name
Political Sciences Journal
الحول الديمقراطي في بنغلادش
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التحول الديمقراطي في بنغلادش

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Publication Date
Mon Mar 01 2004
Journal Name
Al-academy
منطق الشكل في الخزف
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منطق الشكل في الخزف

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Publication Date
Sun Jun 18 2023
Journal Name
Arab Science Heritage Journal
القيادة في المنظور الإسلامي
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There are many studies regarding the topic of ‘leadership’ in modern era, especially the studies of the west and the Muslims who followed them in our Arab countries. These studies rely on the modern western theories, they deal with topics like the difference between administration and leadership

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