research centers


Search results: Found 33

Listing 1 - 10 of 33 << page
of 4
>>
Sort by

Article
Evaluation of fixed partial denture in relation to gingival recession and other factors

Authors: Faiza M. Abdul – Ameer فائزة عبد الامير --- Zainab M. Abdul – Ameer زينب عبد الامير
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2005 Volume: 17 Issue: 3 Pages: 13-16
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: Gingival recession may be due to faulty dental treatment. The aim of this study was to investigate the distribution of fixed partial dentures according to age, sex, location and type of material used in construction and discovers the influence of fixed partial denture characteristics (quality, duration, number of abutments and pontics) on frequency of gingival recession.Materials and Methods: A total of 160 patients were selected from patients attending for dental examination at college of dentistry, University of Baghdad. The subjects had cast or ceramic fixed partial denture or dentures for at least 3 years. The distributions of restoration according to age, sex, location and type of material were investigated. Number of abutments and pontics, quality and duration of restoration since worn in relation to gingival recession were evaluated.Results: Females asked more for fixed partial dentures in younger age group than males, and in upper anterior region more than other regions. The percentage of cast fixed partial denture was more than ceramic type. A higher percentage of patients had gingival recession related to restoration with poor marginal integrity and longer period since worn. A high significant difference was found between lengths of fixed partial denture and absence of gingival recession and low significant differences between quality of restoration and presence of gingival recession.Conclusion: The study concluded that fixed partial denture characteristics (quality, duration, number of abutments and pontics) had significant and high significant effects on frequency of gingival recession


Article
Iraq’s Southern Marshes Something Special To Be Conserved; A Case Study

Author: H. M. Bedair , H. T. Al Saad and N. A. Salman
Journal: Marsh Bulletin مجلة الاهوار ISSN: 18169848 Year: 2006 Volume: 1 Issue: 2 Pages: 99-126
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

Iraqi southern marshes form a large triangular region bounded by three major southern cities: Nasiriyah to the west, Amarah to the northeast, and Basrah to the south. Their vast area covers 20,000 square kilometers of open water, and includes both permanent and seasonal marshes. Three major areas are the Al-Hammar, the Central, and the Al-Hawizeh Marshes form the core of the marsh land of southern Iraq. It is centered on the meeting of the great Tigris and Euphrates Rivers. Such specific wetlands of the southern part of Iraq play a vital role in the maintenance of biodiversity in the Middle East, primarily because of their large size, the richness of their aquatic vegetation and their isolation from other comparable systems.Aims of this literature review may include addressing certain key issues, such as definition and description of the general conditions of the Iraq’s southern marshes, and why should the marshes be protected? Another issue, we introduced the “Healthy Marshes Concept”, to be adopted for sustaining life and to control pollution in the marshes following the full scale restoration. Another part of this study is devoted for the discussion of how can marsh conditions be studied and monitored on a continuous way to achieve the “healthy marshes concept” issue. On the other hand, the study provides information and Internet links to the international institutions and political programs willing to participate or to address the global concern about the restoration of the Iraqi southern wetlands following the disastrous devastation of its unique ecosystem during the 1990’s period.Finally, the literature citation, and the extensive lists of species should provide vital references for any research or a study to be conducted on wetlands, both locally or on a global scale. The “Southern Marsh Project” issue is the advice to take home from this study. It represents a call for a systematic, long term research program of monitoring all the aspects and conditions of the Iraqi Southern marshes, and probably the neighboring Countries. The program is a comprehensive, multi-vision project aims for careful restoration of the marshes after its disastrous devastation.


Article
Assessment Of Water Quality Of East Hammar Marsh Using WQI, Basra-Iraq
تقييم نوعية مياه هور شرق الحمار باستخدام دليل نوعية المياه WQI

Loading...
Loading...
Abstract

The Canadian Water Quality Index (CCME WQI) was applied to assess the water quality of three (3) sampling stations in East Hammar marsh during (Nov.2012) to (Oct.2013). The historical studies before/after restoration were used during the evaluation process.Water temperature, Salinity, Transparency, pH, Dissolved oxygen, Reactive Nitrate and Phosphate were selected to calculate the index.The results revealed that the WQI ranged between (28.2 – 49.6) and (40.7 – 62.7) depending on the historical studies before/after drainage respectively, classified as (poor) to (marginal). The study revealed that the water quality of the east Hammar marsh was better than its quality after three years of restoration.

تم تطبيق دليل نوعية المياه النموذج الكندي (CCME WQI) كوسيلة لتقييم نوعية المياه لثلاث (3) محطات في هور شرق الحمار خلال الفترة من تشرين الثاني 2012 لغاية تشرين الاول 2013. تم اعتماد الدراسات التاريخية قبل اجراء عملية تجفيف اجزاء من الاهوار و بعد الغمر في عملية التقييم.تم اختيار سبع متغيرات لحساب الدليل و هي درجة حرارة الماء و الملوحة و الشفافية و الاس الهيدروجيني و الاوكسجين المذاب و النترات الفعالة و الفوسفات الفعالة.أظهرت النتائج تباينا في قيم الدليل بين المحطات حيث تراوحت بين (28,2 الى 49,6) و (40,7 الى 62,7) اعتمادا على الدراسات التاريخية قبل و بعــــــــد التجفيف على التوالي، و تصنف بين (فقير) و (هامشي). يستنتج من الدراسة الحالية ان مياه هور شرق الحمار بمستوى افضل من نوعيته المسجلة بعد مضي ثلاث سنوات من اعادة الاغمار.

Keywords

Iraqi Marshes --- Restoration --- WQI


Article
Mercury release from a two surface amalgam restoration

Authors: Jabbar H KAMEL --- Faraed D SALMAN
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2001 Volume: 1 Issue: 1 Pages: 61-64
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Mercury release from a two surface amalgam restoration has been determined in blood and urine at different time interval after performing amalgam restoration. The results showed that the average mercury released in blood reached relatively the level that was before restoration to be done after 3 weeks


Article
The effect of amalgam alloy types, surface treatments, and bonding agents on the shear bond strength between amalgam and resin composite

Authors: Raghad A. Rasheed --- Abdul–Haq A. Suliman
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2006 Volume: 6 Issue: 3 Pages: S38-S47
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

To evaluate the effect of amalgam alloy types, surface treatments, bonding agents, on the shear bond strength between set amalgam and resin composite restorative materials. Materials and Methods: Three hundred and thirty eight holes (6 mm in diameter and 2 mm depth) prepared in a 2x2.5 cm cold cure acrylic resin blocks in which amalgam was condensed. The 338 samples were divided into two groups, the control group which consisted of 26 intact amalgam samples, and the repair group consisted of 312 repair amalgam samples. Each group (intact, and repair) was subdivided into two groups according to the type of amalgam alloy. Half of the samples were filled with spherical amalgam alloy and the other were filled with admixed amalgam alloy. The repair samples then divided in to four groups according to the surface treatment, in turn each sub-group divided into three groups according to the bonding agent. The samples were thermocycled, before shear bond strength was tested. The mode of failure was observed for each specimen. Results and Conclusion: The statistical analysis showed that the repair strength was 50% of the intact strength, and the admixed amalgam samples showed higher shear bond strength than spherical amalgam samples. The group roughened with diamond bur showed higher repair bond strength than the groups received other surface treatment. The use of dentin bonding agent (All–Bond 2 and Alloybond) would increase the repair bond strength between the amalgam and the composite restorative materials. And the mode of failure was mostly an adhesive type.


Article
Evaluation of the effect of preheating on micro leakage of Class II composites Restoration (A comparative in vitro study)

Authors: Wasan M. Hasson --- Zainab M. AbdulAmeer
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2017 Volume: 29 Issue: 2 Pages: 21-25
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: The aim of this in vitro study was to evaluate and compare the effect of preheating microleakage among three different filler size composites which include Filtektm Z250 micro hybrid, Z250xt Nano hybrid and nanocomposite Z350xt. in Class II cavity preparation .Materials and methods: sixty maxillary first premolars were prepared with class II cavities. Samples were divided into three groups according to material used group A (FiltekZ250 micro hybrid). Group B(Z250xt Nano hybrid). Group C (nanocomposite Z350xt)and each group divided into two subgroups of ten teeth according to temperature of composite: Group A1 Teeth are restored by composite at room temperature(24±1˚C), A2 Teeth are restored by same composite at preheated temperature(54±1˚C). After 24 hrs. immersion in 2% in methylene blue, samples were sectioned and micro leakage was estimated.Results: The greater scores of micro leakage mentioned in Group A( Z250 micro hybrid) in cervical margin while in Group B( Z250xt Nano hybrid) and Group C (Z350xt nanocomposite) have least score of micro leakage especially in occlusal margin.Conclusions: The scores of micro leakage for all groups varied with different material, margin and temperature. Generally, preheating decreased micro leakage in all groups of composites ,but Preheating decreased micro leakage effectively in Z250 micro hybrid more than Z250xt Nano hybrid and Z350xt nanocomposite micro leakage


Article
The incidence of tooth loss and restorations in Al–Shamsiat Village

Authors: Nadira A Hatim --- Ammar Kh Al–Nori --- Sawsan H Al–Jubori
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2004 Volume: 4 Issue: 2 Pages: 87-94
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

The aim of this research is to investigate the incidence of tooth loss, distribution of tooth loss in the oral cavity, the incidence of smoking habits and its relation to tooth loss and to evaluate the motivation of patients to replace their missing teeth and their attitude toward the type of replacement, either fixed or removable in rural area (Al–Shamsiat village) in Ninevah Governorate. A sample of 500 individual aged 15– 70 years was selected randomly and examined using special chart prepared for this study. The results showed that 337 subjects were with partially missing of teeth. Three subjects (3.96%) with complete loss of teeth and the rest (160 subjects, 32%) were complete natural teeth. The study showed that there is no significant relationship between smoking and tooth loss. The motivation of patients was toward the type of prosthesis that are made mostly of removable acrylic type. A high percentage of population (64.86%) desire to replace their missing teeth in the village, which reflect the need of dental health, and dental treatment in the community.


Article
Phytoplankton primary production in southern Iraqi marshes after restoration
الانتاجية الاولية للهائمات النباتية لاهوار جنوب العراق بعد اعادتها

Authors: W. D. Taylor ويليم دي تايل --- D. S. Abdulah داوود سلمان عبدالله --- A. H. Talib عادل حسين طالب --- A. A. Al-Kubaisi عبدالرحمن عبدالجبار الكبيسي --- et al.
Journal: Baghdad Science Journal مجلة بغداد للعلوم ISSN: 20788665 24117986 Year: 2011 Volume: 8 Issue: 1عدد خاص بمؤتمر علوم الحياة Pages: 519-530
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Primary productivity and chlorophyll-a were used in this study to monitor the restoration process of southern Iraqi marshes (Al-Hewaizeh, central marshes, and Al-Hammar). The phytoplankton primary productivity was based on oxygen light/dark bottle method. Two different depths samples were taken monthly from six studied marshes stations (two stations for each marsh) during November 2005 to October 2006, while chlorophyll-a samples taken from surface water. The phytoplankton primary productivity values ranged 9.38 – 249.79 mg C/m3.hr for all marshes, its values for surface water sample ranged 11.71 – 256.24 mg C/m3.hr, while for 1m depth ranged 9.38 – 142.5 mg C/m3.hr. Chlorophyll-a values ranged between (1.1 – 21.26) µg/l indicating high values of productivity in the studied marshes comparing with other aquatic Iraqi ecosystems. Also, dissolved oxygen and oxygen saturation rate were measured in this study.

استعملت الانتاجية الاولية للهائمات النباتية والكلوروفيل-أ في هذه الدراسة لمراقبة عمليةِ إعادةِ اهوار جنوب العراق (الحويزة والاهوار المركزية والحمّار). اعتمدت طريقة قناني الأوكسجينِ ضوء/ظلام. اُخذت عينتان بعمقين مختلفتين شهريا من ستة محطاتَ في الاهوار الثلاثة (محطتين لكُلّ هور) للمدة من تشرين الثّاني 2005 إلى تشرين الأولِ 2006، فيما اُخذت عينات الكلوروفيل-أ من السطح فقط. تراوحت معدلات الإنتاجية الأولية بين 9.38 - 249.79 ملغم كاربون/م3.ساعة لكُلّ الاهوار، فيما تراوحت قِيَمها لعيّنةِ السطح بين 11.71 - 256.24 ملغم كاربون/م3.ساعة بينما لعينة العمق 1 mفتَراوحَت بين 9.38 - 142.5 ملغم كاربون/م3.ساعة. سجلت قيم الكلوروفيل-أ مدى تراوح بين 1.1 الى 21.26 مايكروغرام /لتر للاهوار الثلاثة مسجلة ً قيم عاليةلانتاجية الاهوارالمدروسة مقارنة بالمسطحات المائية العراقية الاخرى. ألاوكسجين الذائب ونسبةَ إلاشباعِ للأوكسجينِ قِيست ايضاً في هذه الدراسةِ.


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

Loading...
Loading...
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 Distribution of Ceratophyllum demersum L. in Relation to nvironmental

Author: M. A. H. Al-Kenzawi* , F. M. Hassan* and A.A.A. Al-Mayah** فكرت مجيد حسين و عبد الرضا اكبر المياح
Journal: Marsh Bulletin مجلة الاهوار ISSN: 18169848 Year: 2012 Volume: 7 Issue: 2 Pages: 137-149
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

After extensively drained of Mesopotamian wetlands, southern Iraq in 1990s Ceratophyllum demersum L. reappeared as response to re-flooding. This investigation was conducted to study distribution of Ceratophyllum demersum in Al-Mashb marsh, Hor Al-Hammar, and the physical-chemical properties of its habitat, Water depth (WD), light penetration (LP), water temperature (WT), water salinity (Sal.), pH, dissolved oxygen (DO), calcium (Ca+2), magnesium (Mg+2), nitrite, nitrate, and phosphate were seasonally determined during 2008. Its vegetation cover percentage was 85 % with its peak in summer, while the lowest value was35 % in winter. CANOCO ordination program (CCA) was used to analyze the data. Statistically, Positive relationships for WT, pH, Ca+2, Mg+2, nitrite, nitrate, and phosphate with the vegetation cover percentage were observed. However, negative relationships for Sal, WD, LP, and DO with the vegetation cover percentage were observed.Myriophyllum spicatum L. and Hydrilla verticillata (L.f.) Royle were recorded as associated species with C. demersum community in this study.

Listing 1 - 10 of 33 << page
of 4
>>
Sort by
Narrow your search

Resource type

article (32)

journal (1)


Language

English (28)

Arabic (2)

Arabic and English (2)


Year
From To Submit

2019 (2)

2018 (3)

2017 (1)

2016 (2)

2015 (1)

More...