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Article
Effect of air abrasion treatment on microleakage of a pit and fissure sealant (in vitro study)

Author: Dr. Baydaa Hussein ,B.D.S, MSc. * د.بيداء حسين
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2007 Volume: 4 Issue: 2 Pages: 162-168
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The aim of this study was to compare in vitro the microleakage of a pit and fissure sealant after different enamel surface treatments: (1) acid etching only, (2) air abrasion only, and (3) air abrasion followed by acid etching.Thirty sound human upper premolars were used in this study. The teeth were divided into three groups according to the type of treatment prior to sealant application: Group 1 (in which the occlusal surface was etched with 37% phosphoric acid gel for 30 seconds), Group 2 (in which the occlusal surface was air-abraded for 10 seconds with sodium hydrogen carbonate powder), and Group 3 (in which the occlusal surface was air-abraded as in group 2 and then acid etched as in group 1). Then a light-cured pit and fissure sealant (Fisseal, Promedica, Germany) was applied to the central fissure in the occlusal surface of each tooth and light cured for 20 seconds. Then the teeth were thermocycled between 5ºC and 55ºC for 10 cycles, immersed in 0.5% basic fuchsine dye for 24 hours at room temperature, embedded in auto-polymerizing acrylic resin, sectioned longitudinally bucco-lingually, and examined under a stereomicroscope for dye penetration.The results of this study showed that the highest mean of microleakage scores was in group 2 (air abrasion group), while the lowest mean of microleakage scores was in group 3 (air abrasion + acid etching), with statistically highly significant difference (p<0.01) between group 1 and group 2, and between group 2 and group 3, with statistically non-significant difference between group 1 and group 3 (p>0.05).Air abrasion treatment prior to sealant application was not effective in reducing microleakage and should be followed by acid etching.


Article
Microleakage evaluation of two types of pit and fissure sealants using two different methods, (in vitro study)

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Abstract

Background: Clinical preventive procedures must be done after careful assessment;one of the major risk factor is the occlusal morphology of the posterior teeth. Thesecaries free fissures must be sealed. This in vitro study evaluated the microleakage oftwo types of sealant materials (unfilled resin and flowable composite) on enamelsurfaces prepared using two methods (acid etching with enameloplasty and acidetching alone).Material and methods: Thirty two extracted human third molar were selected andrandomly assigned in to 4 groups of eight teeth each; group A, the occlusal surfaces ofteeth were acid etched ,then sealed with concise white sealant; group B, they wereacid etched then sealed with wave mv flowable composite ;group C, they wereprepared with bur ,acid etched ,then sealed with concise white sealant ;group D, theywere prepared by bur, acid etched, then sealed with wave mv flowable composite. Thesealed surfaces were stored for seven days in distilled water, then specimens werethermocycled 500 cycles, immersed 24 hours in a 2% buffered methylene blue dye,then sectioned and analyzed for leakage under a stereo microscope. Chi-square testwas performed to test the differences of leakage among the four groups.Results: The results showed that there was no significant difference (p>0.05) inmicroleakage for the same material with and without bur preparation. Concise whitesealant produced significantly (p<0.05) less microlaekage than wave flowablecomposite.Conclusion: under the conditions of the present study, bur preparation(enameloplasty) followed by acid etching produces no less microlaekage than did acidetching alone. Concise white sealant (unfilled resin) demonstrated less amount ofmicrolaekage when compared to wave mv flowable composite.


Article
Evaluation of Pit and Fissure Sealant With and Without Topical Fluoride Application
تقييم ختم التجويف والشق مع وبدون استعمال الفلورايد الموضعي

Author: Huda E. Ali Al-Rubaye هدى الياس علي الربيعي
Journal: Al-Rafidain University College For Sciences مجلة كلية الرافدين الجامعة للعلوم ISSN: 16816870 Year: 2014 Issue: 33 Pages: 235-254
Publisher: Rafidain University College كلية الرافدين الجامعة

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Abstract

The majority of the detected increment in dental caries is confined to pit and fissure surfaces of teeth. Application of pit and fissure sealants and topical fluorides are widely used procedures in the prevention of decay.The purpose of this study was to evaluate the effectiveness of pit and fissure sealant with and without topical fluoride application in the prevention of dental caries on the occlusal surfaces of teeth in children.93healthy cooperative children of both sexes with an average age (7-9 years) were included in this study, accordingly, 120 permanent first molars that were caries-free and fully erupted divided into two groups: sealant group (sealant applied on 60 permanent first molars) and sealant withfluoride group (sealant plus fluoride gel applied topically every three months intervals for 24 months on 60 permanent first molars). All children were recalled for assessment of fissure sealant and the presence or absent of dental caries at intervals of 6, 12, 18 and 24 months.The statistical analysis shows that there was no significant differences in the presence and absent of dental caries on the occlusal surfaces of the teeth between sealant group and sealant with fluoride group at baseline time and at 6, 12, 18 and 24 months intervals of recall assessment.There was some evidence about the superiority of pit and fissure sealant over topical fluoride application in the prevention of occlusal decay. However, it remained unclear to what extent there is differences between the effectiveness of pit and fissure sealant with and without topical fluoride application. No recommendation for the clinical practice could be given and the benefit of pit and fissure sealant with and without topical fluoride application should be considered locally and individually.

غالبية الزيادة في الكشف عن تسوس الأسنان يقتصر على ختم تجويف وشق الأسنان. وتستخدم على نطاق واسع ختم التجويف والشقوق والفلورايد الموضعي للوقاية من التسوس. كان الغرض من هذه الدراسة تقييم فعالية ختم التجويف والشقوق مع وبدون استعمال الفلورايد الموضعي في الوقاية من التسوس على سطوح الأسنان عند الأطفال.93 طفلا متعاونا وصحيا من كلا الجنسين يبلغ متوسط أعمارهم (6-9 سنوات) ادرجو في هذه الدراسة, وفقا لذلك,(120) من الأضراس الدائمة الأولى خالية من التسوس والتي بزغت بالكامل في الفم قسمت إلى مجموعتين: مجموعة الختم (60 ضرس دائمي أول) ومجموعة الختم مع الفلورايد (استعمال هلام الفلورايد موضعيا كل ثلاثة أشهر لمدة 24 شهر على 60 ضرس دائمي أول). جميع الأطفال استدعوا لتقييم ختم الشق وكذلك وجود أو غياب تسوس الأسنان على فترات 6, 12, 18 و24 شهرا.أظهر التحليل الإحصائي عدم وجود فروق ذات دلالة إحصائية في وجود وغياب التسوس على سطوح الأسنان بين المجموعتين في وقت خط الأساس وبعد 6, 12, 18 و 24 شهرا في فترات الاستدعاء للتقييم. كان هناك بعض الأدلة حول تفوق ختم التجويف و الشق على استعمال الفلورايد الموضعي في الوقاية من تسوس سطوح الأسنان. مع ذلك, فانه لا يزال غير واضح إلى أي مدى هناك اختلافات بين فعالية ختم التجويف والشق مع وبدون استعمال الفلورايد الموضعي.ا يمكن إعطاء أي توصية للممارسة السريرية وينبغي النظر في الاستفادة من ختم التجويف والشق مع وبدون استعمال الفلورايد الموضعي محليا وبشكل فردي. كلمات مفتاحية: ختم التجويف والشق, الوقاية من التسوس, الفلورايد الموضعي, تجربة سريرية.


Article
Isolation and sero-diagnosis of Newcastle Disease Virus Infection in Human and Chicken Poultry Flocks In Three cities of Middle Euphrates
عزل وتشخيص سيرولوجي للاصابة بفايروس النيوكاسل المرضي في الانسان وقطعان الدواجن في ثلاث مدن من منطقة الفرات الاوسط

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Abstract

This study was planned for detection of Newcastle Disease (ND) infection in human and chicken flocks in Euphrates by the using sero-diagnosis of heamagglutination (HA), heamagglutination inhibition assay (HAI) and competitive ELISA.The NDV was diagnosed in najaf chicken flock by isolation and propagation of virus in chicken egg embryos. The NDV Ab was detected in serum of local chicken flocks isolated by using competitive ELISA which was indicated the positive high Ab titer with inhibition percent titer more than 40%(PIt>40%) of the total samples. The fifty eight (58) collected human sera of most poultry associated people in Euphrates in Iraq was determined by NDV competitive ELISA and showed 3 cases from farmers were positive to NDV(PIt>40%).

هذه الدراسة صممت للتحديد الاصابة بالنيوكاسل المرضي في الانسان وقطعان الدواجن في ثلاث مدن من الفرات الاوسط بواسطة استخدام التشخيص المصلي بواسطة الاختبار التلازن الدموي واختبار تثبيت التلازن الدموي والاليزا التنافسي .فايروس النيوكاسل المرضي قد شخص في قطعان الدواجن في النجف بواسطة العزل والتهيئة للفايروس في بيض الدجاج النامي . مستضدات فايروس النيوكاسل المرضي شخصت في مصول قطعان الدواجن المعزول منها العزلة المحلية اصلا بواسطة الاليزا التنافسي الذي اعطى نسبة موجبة عالية للمستضدات بنسبة تثبيط مئوية اعلى من 40% لكل العينات. المصول الثمانية والخمسون للاناس الاكثر تعاملا مع الدواجن في ثلاث مدن من الفرات الاوسط في العراق تم تحديدها بواسطة الاليزا التنافسي و اظهر ثلاث حالات موجبة من المزارعين التي كانت موجبة لفايروس النيوكاسل المرضي بنسبة تثبيط مئوية اكثر من 40%.

Keywords

NDV --- chicken egg embryos --- HA --- HAI --- competitive ELISA --- PIt.


Article
Survey and description The Type of Safrawi Cultivar in Mosiaf region/ Hamah – Syria
مسح وتوصيف طرز من صنف الزيتون صفراوي في منطقة مصياف/ حماة – سوريا

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Abstract

This research was carried out during 2010-2011 in Mosiaf rذegion. We selected and described seven types (sub cultivar) of the main cultivar in this region which is called Safrawi from three places Hazoor, Al Warraka and Wadi El Kawwas. The fruit weight and pulp to pit ratio were studied in addition to calculate oil percentage in GCSAR laboratory by soxhlet, and the data were analyzed statistically by using Genstat 8 program in order to determine the least significant differences between them. The results of the study point to the presence of the biodiversity among the tress of the cultivar Safrawi in Mosiaf according to its fruits weight, pulp/pit and oil percentage, even among types grow in the same place, the Type S5 have had the highest oil percentage (27%) so it is good for oil production whereas the type S3 had good traits in both fruit weight and pulp/pit ratio ( 7.03, 4.79g) so it is recommended as a table olive type.From all above mentioned, arises the need for conserving these types in germplasms and consuming the evaluation of them by analyses its oil components and conducting biogenetic experiment to determine the genetic relationship among them .

أجريت هذه الدراسة خلال الموسمين 2010 و 2011 في منطقة مصياف حيث انتخبت 7 طرز من الصنف الرئيسي المنتشر في هذه المنطقة والذي يدعى الصفراوي من ثلاثة مناطق حزور و الوراقة ووادي القواص. تم دراسة كل من وزن الثمار ونسبة اللب / البذرة إضافة لتحديد نسبة الزيت في مخبر هيئة البحوث الزراعية باستخدام جهاز استخلاص الزيت (السوكسليت)، كما تم تحليل القراءات إحصائيا باستخدام برنامج GenStat 8 الإحصائي لتحديد أقل فرق معنوي بينها LSD. أشارت النتائج لوجود تنوع حيوي بين أشجار الصنف الصفراوي وفقاً للمواصفات المدروسة، حتى ضمن طرز المنطقة الواحدة حيث احتوى الطراز S5 على أعلى نسبة زيت بلغت 27% مما يرجح استخدامه كطراز لانتاج الزيت بينما أعطى الطراز S3 نسبة جيدة لكل من وزن الثمار و نسبة اللب/ البذرة (7.03, 4.79 غم) لذا ينصح به كصنف مائدة. يتبين مما ذكر ضرورة حفظ هذه الطرز في مجمعات وراثية ومتابعة تقييمها بتحليل مكونات الزيت واجراء التحاليل الجزيئية لها لتحديد القرابة الوراثية بينها.

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