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Article
Comparison among pulp capping materials in: calcium ion release, pH change, solubility and water sorption(An in vitro study)

Author: Nagham A. AL-Hyali
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2017 Volume: 29 Issue: 3 Pages: 9-16
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Calcium hydroxide and calcium-silicate materials used as direct pulp capping materials. The aims of this in vitro study is to compare among these materials in, the calcium ion release and pH change in soaking water after immersion of materials’ specimens in deionized water. Also Solubility and water sorption of materials’ specimens measured after soaking time. Calcium-silicate materials used were Biodentine, TheraCal and MTA Plus.Materials and methods: Four materials used in this study; Urbical lining (as control group), Biodentine, TheraCal and MTA Plus. Ten discs fabricated from each tested material, by using plastic moulds of 9 mm diameter and 1 mm thickness. Each specimen was immersed in 10 ml of deionized water and stored at 37ºC using incubator for 3 hr, 24hr, 14 days and 30 days as a sequence. The amount of calcium ion (Ca+2) released in soaking water was measured in each tube using atomic absorption spectrophotometer. Also pH analysis for soaking water measured by using pH meter. For solubility and water sorption measurement, the specimen (n=10) weighed with precision weighing scale before immersion in deionzed water to determine the initial Weight (W1) and immediately after weighing immersed in 10 mL of deionized water at 37 °C for 1 week using an incubator, then removed and weighing again (W2). The samples blotted dry using filter paper and dehydrated in an oven at 37 °C for 24 hr and weighed again (W3). Then percentage of solubility and water sorption were determined. The obtained data were analysed using one-way ANOVA and Tukey tests at 0.05 significant levels.Results: Statistical analysis showed highly significant differences (P<0. 05) among tested materials and in all tests (Ca+2 release, pH change, solubility and water sorption). Biodentine showed higher calcium ion released at four soaking time, with non significant difference with TheraCal and highly significant difference with MTA Plus and control group at 24 hr. immersion time; While MTA Plus showed non significant difference with control group at 24 hr. Less amount of calcium released was in control group. All tested materials induced alkalization of the soaking water that decreased with time. Means of solubility and water sorption showed that MTA Plus and biodentine had higher solubility in comparison with control group, while TheraCal showed less solubility than control group. The results of water sorption showed that less sorption percentage occurred in control group in comparison with other groups.Conclusion: calcium-silicate materials released more Ca+2 with time than calcium hydroxide. TheraCal showed less solubility and higher water sorption in comparison with control group. Biodentine and MTA Plus showed higher solubility and water sorption in comparison with TheraCal and control group


Article
Inhibition of bacterial growth around gutta percha cones by different antimicrobial solutions using antibiotic sensitivity test (An in vitro study)

Author: Nagham A. Al-Hyali نغم الحيالي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 4 Pages: 26-32
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Decontamination of gutta percha cones was important factor for success of root canal treatment. Theaim of the present in vitro study was to identify and to compare the antimicrobial effect of following disinfectionsolutions: 0.2% chlorhexidine gluconate, Iodine, tetracycline hydrochloride solution, EDTA & formocresol mixed withzinc oxide eugenol, on E faecalis, E coli and Candida albicans using sensitivity testMaterials and Methods: Three types of microorganisms were isolated from infected root canals (E faecalis, E coli andCandida albicans) and cultured on Mueller Hinton agar petri-dishes. Disinfection of gutta percha cones done byimmersion in six disinfection solutions (six groups), the groups are: distill water (used as control group), 0.2%chlorhexidine gluconate, Iodine, tetracycline hydrochloride solution, EDTA & formocresol mixed with Zinc oxideeugenol. The immersion times were 5 min. and the incubation was aerobically at 37 °C for 24 hr. for bacterial speciesand at 28°C for 48 hr. for candida albicans. After incubation, zones of inhibition (no growth of bacteria) wereexamined around the gutta percha cones & diameters of the zones were measured with a boley gauge. The meansof inhibition zones for each group were measures and statistically analyzed among groups using ANOVA and LSDtests at 0.05 significance level.Results: There is highly significant differences (P=0.000) among all the tested groups. 0.2% Chlorhexidine gluconateshowed the maximum antibacterial efficacy (broader zones of inhibition) against E faecalis. Compound offormocresol + Zinc oxide eugenol showed the maximum antibacterial efficacy against Candida albicans, and E coli.The minimum antibacterial efficacy against Candida albicans occurred with tetracycline group, while against Efaecalis and E coli occurred with EDTA groupConclusion: All the tested materials had antibacterial efficacy against Candida albicans, E faecalis and E coli; butchlorhexidine gluconate and compound of formocresol & Zinc oxide eugenol, are more effective agents for a rapiddisinfection of gutta-percha cones in five minutes


Article
Effect of three types of mouth rinses and human saliva on color stability of packable and nanocomposite resins (In vitro study)

Authors: Haitham J. AL-Azzawi --- Nagham A. Al-Hyali
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2010 Volume: 22 Issue: 3 Pages: 8-12
Publisher: Baghdad University جامعة بغداد

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Abstract

ABSTRACT
Background: The purpose of this an in vitro study was to evaluate and compare the influence of three types of
mouth rinses (alcohol- containing, alcohol-free and chlorhexidine-containing mouth rinses) and human saliva on
color stability of two types of composite resins (packable and nanofilled composite).
Materials and Methods: Total number of 64 specimens were prepared and divided according to type of composite
resins used, into two groups: 32 specimens made from packable P60 and 32 specimens made from Filtek Supreme XT
nanocomposite. Then each 32 specimens subdivided into 4 subgroups according to treatment solutions used. Each
subgroup of specimens was immersed, after curing, in distilled water for 24hr at 37°C then subjected to color
measurement for baseline readings determination. Then each subgroup was immersed in 20 ml of treatment
solutions and incubated at 37°C for 24 hr and re-subjected to color measurement. The change in color difference
was calculated for each specimen. The resulting data were statistically analyzed using ANOVA and t- test at 0.05
significance level.
Results: The results revealed that all tested solutions produced color change in both tested resin composite.
However, the greatest perceptible color change was observed on using mouth rinses with low PH.
Conclusion: Both alcohol-containing & alcohol-free mouth rinses causes perceptible color change of composite
resins, while saliva causes non perceptible color change of both composite resins. The color change was perceptible
in nanocomposite and non perceptible in packable composite with Chlorhexidine-containing mouths rinses.
Keywords: Mouth rinses, saliva, composite resins & spectrophotometer. (J Bagh Coll Dentistry 2010;22(3): 8-12)
الخلاصة
اجر&#1740;ت ھذه الدراسةِ المختبر&#1740;ة لْتَق&#1740;&#1740;م ومُقَارَنَة تأث&#1740;رِ ثلاثة أنواع من غسول الفم (&#1740;حتوي على الكحول، خالي من الكح ول، وغ سول ف م &#1740;حت وي عل ى الكلورھك سد&#1740;ن) ولع اب الإن سان عل ى
.( Filtek P وراتنج مركّب قابل للتراص 60 Filtek Supreme XT إستقرار اللونِ لنوع&#1740;ن مِنْ أنواعِ الراتنج المركب (مركب نانو
الأعداد الكل&#1740;ّة مِنْ &#1638;&#1636; نموذجِ ھُ&#1740;ّأتْ، بأستخدام قالب صنع خص&#1740;صا لھذه الدراسة، وقُسّمتْ الى مجموعت&#1740;ن حسب نوع الراتنج المركب المستخدم
ثمّ كُلّ مجموعة قسّمتْ إلى &#1636; مجام&#1740;ع فرع&#1740;ةِ طبقاً لمحال&#1740;ل المعالجةِ المستعملة : -
.(Listerine) مجموعة فرع&#1740;ة &#1640; :&#1633; نماذج غَطستْ في &#1634;&#1632; مل&#1740;لترِ مِنْ
.(Oral-B) مجموعة فرع&#1740;ة &#1640; :&#1634; نماذج غَطستْ في &#1634;&#1632; مل&#1740;لترِ مِنْ
( Corsodyl mint) مجموعة فرع&#1740;ة &#1640; :&#1635; نماذج غَطستْ في &#1634;&#1632; مل&#1740;لترِ من
مجموعة فرع&#1740;ة &#1640; :&#1636; نماذج غَطستْ في &#1634;&#1632; مل&#1740;لترِ لعابِ غ&#1740;رِ مُحَفَّزِ إنسانيِ.
كل مجموعة فرع&#1740;ة من النماذجِ غُمِرتْ بعد التصلب في الماءِ المُقَطَّرِ ل &#1634;&#1636; ساعة عند &#1635;&#1639; درجة سل&#1740;ل&#1740;ز&#1740;ة ثمّ تخ ضع لق&#1740; اسِ الل ون لت صم&#1740;مِ الق راءاتِ الاول&#1740; ة. بع د ذل ك، تغم ر كُ لّ مجموع ة
فرع&#1740;ة في &#1634;&#1632; مل&#1740;لترِ مِنْ محلول المعالجةِ المُخَصَّصِوتحفظ في &#1635;&#1639; درجة سل&#1740;ل&#1740;ز&#1740;ة ل &#1634;&#1636; ساعة وتخضع ثان&#1740;ة لق&#1740;اس اللون.
.tَ و اختبار (LSD) اختبار الفرق المعنوي ، (ANOVA) حللت الب&#1740;انات الناتجة احصائ&#1740;ا باستخدام اختبار تحل&#1740;ل التبا&#1740;ن
اظھ ر تغ&#1740;رل ونُ مح سوس ف ي غ سول Filtek P بعد الغمرِ في كُلّ المحال&#1740;لِ المُجرّبةِ ماع دا اللع ابِ. لك ن 60 Filtek Supreme XTِ كَشفتْ النَتائِج تغ&#1740;ر لونِ محسوسِ بصر&#1740;ا" في مادّة
وتغ&#1740;&#1740;ر لونِ غ&#1740;رِ محسوسِ عندما &#1740;غَطسَ في غسول فم تحتوي على الكلورھكسد&#1740;ن او اللعاب. Oral-B و Listerine الفم
ك شفت النت ائج اخ تلاف اح صائي ھ ام ج دا ب &#1740;ن مج ام&#1740;عھم الفرد&#1740; ة ف ي تغ&#1740; ر الل ون ، والتغ&#1740; رات الاكب ر ، tَ بواس طة اختب ار Filtek Supreme XT و Filtek P عن دما قارن ا ب &#1740;ن 60
.Filtek Supreme XT وجدت

Keywords


Article
Comparative evaluation of the radiographic density of GuttaFlow® 2 in different obturation techniques using Spiral Computed Tomography

Authors: Nagham A. AL-Hyali --- Ala,a Jawad Kadhim
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2018 Volume: 30 Issue: 4 Pages: 8-14
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Ideal root canal obturation depends on many factors; one of them is good sealing of root canal without pores. The aim of this study was to determine the radiographic density of GuttaFlow® 2 with different obturation techniques using spiral computed tomography.Materials and Methods: Forty palatal roots of permanent maxillary first molar were used in this study. Following working length determination, root canal was prepared using rotary PROTAPER universal system. They were randomly divided into four groups of 10 roots each, the groups are Conventional lateral condensation with Apexit Plus sealer, Conventional lateral condensation with GuttaFlow® 2 as a sealer, Soft Core Regular with GuttaFlow® 2 as a sealer and single cone with GuttaFlow® 2. The experimental roots were then analyzed in both horizontal and vertical sections from the apex to coronal using Spiral Computed Tomography. The obtained data were analyzed using one-way ANOVA and Tukey tests at a level of significance of 0.05.Results: Statistical analysis showed highly significant differences among the different areas (apical, middle and coronal) of each group. The density of obturation systems decreased in the following sequence: single cone with GuttaFlow® 2 (highest density), Soft Core Regular, Conventional lateral condensation with GuttaFlow® 2 as a sealer and finally Conventional lateral condensation with Apexit Plus sealer (lowest density)Conclusion: None of the tested obturation techniques can achieve ideal three-dimensional dense obturation. Single . 2 shows the best results


Article
Effect of three types of mouth rinses and human saliva on microhardness of packable and nanocomposite resins (In vitro study)

Authors: Nagham A. Al-Hyali نغم الحيالي --- Haitham J. AL-Azzawi هيثم العزاوي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2011 Volume: 23 Issue: special issue Pages: 25-29
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The purpose of this an in vitro study was to evaluate and compare the influence of three types ofmouth rinses (alcohol- containing, alcohol-free and chlorhexidine-containing mouth rinses) and human saliva onmicrohardness of two types of composite resins (packable and nanofilled composite).Materials and Methods: Total numbers of 64 specimens were prepared, using molds specially fabricated for this studyand divided according to type of composite resins used, into two groups: 32 specimens made from packable P60and 32 specimens made from Filtek Supreme XT nanocomposite. Then each 32 specimens subdivided into 4subgroups according to treatment solutions used (Listerine, oral-B, chlorhexidine containing mouth rinses and saliva).The specimens of each subgroup was immersed, after curing, in distilled water for 24hr at 37°C then subjected tomicrohardness measurement for baseline readings determination using Vickers microhardness tester. Then eachsubgroup was immersed in 20 ml of treatment solutions and incubated at 37°C for 24 hr and re-subjected tomicrohardness measurement. The change in hardness value was calculated for each sample. The resulting datawere statistically analyzed using ANOVA and t- test at 0.05 significance level.Results: The results revealed that, all mouth rinses tested decreased the hardness of both tested resin-composites andnon significant reduction in microhardness with saliva.Conclusion: Both alcohol-containing & alcohol-free mouth rinses cause, highly significant reduction in microhardnessof composite resins while saliva causes non significant reduction in microhardness. Chlorhexidine-contaianing mouthsrinses highly significant decrease the hardness of nanocomposite and significantly decrease the hardness ofpackable composite.

اجریت ھذه الدراسةِ المختبریة لتَقییم ومُقَارَنَة تأثیرِ ثلاثة أنواع من غسول الفم (یحتوي على الكحول، خالي م ن الكح ول، وغس ول ف م یحت وي عل ى الكلورھكس د ین) ولع اب الإنس ان عل ى( Filtek P وراتنج مركّب قابل للتراص 60 Filtek Supreme XT الصلادة المجھریة لنوعین مِنْ أنواعِ الراتنج المركب (مركب نانوالأعداد الكلیّة مِنْ 64 نموذجِ ھُیّأتْ، بأستخدام قالب صنع خصیصا لھذه الدراسة، وقُسّمتْ حسب نوع الراتنج المركب المستخدم إلى :Filtek Supreme XT 32 عینة من مركب نانو vFiltek P 32 عینة من مركب قابل للتراص 60 vثمّ كُلّ 32 نموذج قسّمتْ إلى 4 مجامیع فرعیةِ طبقاً لمحالیل المعالجةِ المستعملة : -.(Listerine) 8 نماذج غَطستْ في 20 ملیلترِ مِنْ : مجموعة فرعیة 1.(Oral-B) 8 نماذج غَطستْ في 20 ملیلترِ مِنْ : مجموعة فرعیة 2( Corsodyl mint) 8 نماذج غَطستْ في 20 ملیلترِ من : مجموعة فرعیة 38 نماذج غَطستْ في 20 ملیلترِ لعابِ غیرِ مُحَفَّزِ إنسانيِ. : مجموعة فرعیة 4كل مجموعة فرعیة من النماذجِ غُمِرتْ بعد التصلب في الماءِ المُقَطَّرِ ل 24 ساعة عند 37 درجة سلیلیزیة ثمّ تخضع لقیاس الص لادة المجھری ة لتص میمِ الق راءاتِ الاولی ة باس تخدام ف احصِالصلادة المجھریة ڤكرز مایكرومیت. بعد ذلك، تغمر كُلّ مجموعة فرعیة في 20 ملیلترِ مِنْ محلول المعالج ةِ المُخَصَّ صِ وتحف ظ ف ي 37 درج ة س لیلیزیة ل 24 س اعة وتخض ع ث انی ة لقی اس.t و اختبار (LSD) اختبار الفرق المعنوي ، (ANOVA) الصلادة. التغیر في قیمة الصلادة المجھریة تحسب لكل عینة وتحلل البیانات الناتجة احصائیا باستخدام اختبار تحلیل التباینلك ن . Filtek Supreme XT و Filtek P كَش فتْ النَت ائِج ب أنّ ك لا غس ول الف م الح اوي عل ى الكح ول والغس ول الخ الي م ن الكح ول یس ب بان نقص ا احص ائیا ھام ا ج دا ف ي ص لابة 60بش كل احص ائي ھ ام . ام ا اللع ابُ فیس بب Filtek P وی نْقصُ ص لابة 60 Filtek Supreme XT غسول الفم الحاوي على الكلورھیكسیدین یسبب نقصا احصائیا" ھام ا ج دا ف ي ص لابةنقصا في الصلابة المجھریة لكلا النوعین لكنھ إحصائیا غیرَھام.كش فت النت ائج اخ تلاف احص ائي ھ ام ج دا ب ین مج امیعھم الفردی ة ف ي تغی ر الص لابة المجھری ة ، ، t بواس طة اختب ار Filtek Supreme XT و Filtek P عن دما قارن ا ب ین 60.Filtek


Article
Microleakage of class II packable resin composite lined with flowable composite and resin modified glass ionomer cement: An in vitro study

Authors: Haitham J. AL-Azzawi هيثم العزاوي --- Nagham A. AL-Hyali نغم الحيالي --- Firas J. M. Al-Dabbagh فراس الدباغ
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: special issue 1 Pages: 6-10
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Packable composites most commonly used as posterior restorative materials, however, disadvantageslike polymerization shrinkage limited their use, so the aim of this an in vitro study was to investigate the microleakageof posterior packable composite(Filtek™ P-60) using different liner materials; flowable resin composite(Filtek™ Flow)and resin modified glass ionomer cement (Vitrebond TM 7150) using open sandwich technique at the proximal box ofclass II preparation located above the cemento-enamel junction (CEJ)in enamel.Materials and Methods: Twenty four recently extracted human upper premolars were prepared with standardizedClass- II cavities as follows; Occlusal Outline Form: 2mm in bucco-lingual width and 1.5 mm in depth measured fromocclusal fissure to pulpal floor. Proximal Boxes: The depth of the proximal box from the proximal cavo-surface marginto the axial wall was 2mm, so as the bucco-lingual width (2mm). The proximal box margin located 1 mm coronal tothe CEJ (in enamel). The teeth were assigned into 3 groups (n=8): Group-I (control): acid etching (H3PO4) + bondingagent (Adoper Single Bond 2 Adhesive) + posterior packable composite (Filtek™ P-60), Group-II (RMGIC): acidetching + resin modified glass ionomer cement (Vitrebond TM 7150) + posterior packable composite; Group-III(Flowable): acid etching + bonding agent + flowable composite (Filtek™ Flow) + posterior packable composite.The teeth were immersed in distilled water at 37ºC for 24 h., then thermocycled (1000X, 5°-55°C, 30 sec. dwell time)and immersed in 1% methylene blue solution for 24 h., after that the teeth were sectioned longitudinally in mesiodistaldirection and dye penetration in millimeters were measured in each cavity by using stereomicroscope. Dataobtained were analyzed using ANOVA and LSD tests at 0.05 significance level.Results: The microleakage of posterior packable composite (group-I) significantly (P<0.05) decreased by the twoliners used (group-II and group-III), but there is no statistically significant differences (P>0.05) in enamel microleakagein respect to dye penetration were detected between the two liners used (group-II and group-III), with theassociation flowable composite Filtek flow (group-III) showing the best results.Conclusion: The use of flowable composite (Filtek™ Flow) and resin modified glass ionomer(Vitrebond TM 7150) in theopen sandwich technique decrease the microleakage of posterior packable composite(Filtek™ P-60) with marginlocated in enamel surface and better results with flowable composite

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