research centers


Search results: Found 89

Listing 1 - 10 of 89 << page
of 9
>>
Sort by

Article
Characterization of smoker and non smoker human teeth using laser induced breakdown spectroscopy
توصيف الاسنان البشرية للمدخنين وعدم المدخنين باستخدام طيف الانهيار المحتث بالليزر

Authors: Ali A-K. Hussain علي عبدالكريم حسين --- Kadhim A. Aadim كاظم عبدالواحد عادم --- Asmaa N. Ahmed اسماء ناجي احمد
Journal: Iraqi Journal of Physics المجلة العراقية للفيزياء ISSN: 20704003 Year: 2017 Volume: 15 Issue: 32 Pages: 150-159
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

In this work, the elemental constituents of smoker and nonsmokerteeth samples of human were analyzed by Laser induced breakdown spectroscopy method (LIBS). Many elements have been detected in the healthy teeth samples, the important once are Ca, P, Mg, Fe, Pb and Na.Many differences were found between (female and male) teeth in Ca, P, Mg, Na and Pb contents. The concentrations of most toxic elements were found significantly in the smoker group.The maximum concentrations of toxic elements such as Pb, Cd and Co were found in older male age above 60 year.Also, it was found that the minimum concentrations of trace elements such as Ca, P and Na exist in this age group. From these results it is clear that the LIBS technique is a powerful tool for fast identification of teeth problems.

تم في هذا البحث تحليل مكونات عناصر نماذج من اسنان المدخنين وغير المدخنين بأستخدام طيف الانهيار المحتث بالليزر(LIBS). ثم تشخيص العديد من العناصر في الاسنان السليمة اهمها الكالسيوم والفسفور والمغنيسيوم والحديد والرصاص والصوديوم. تم ايجاد العديد من الفروقات في محتوى عناصرالكالسيوم والفسفور والمغنسيوم والصوديوم والرصاص لاسنان الذكور عن الاناث. وجد ان التركيز لاغلب العناصر السامة يختلف بشكل واضح في الاشخاص المدخنين. اكثر نسبة لتركيز العناصر السامةمثل الرصاص والكادميوم والكوبلت كانت في مجموعة الذكور ضمن العمر اكبر من 60 سنة. كذلك كانت اقل نسبة للعناصر الاساسية الكالسيوم والفسفور والصوديوم في نفس المدى العمري. يظهر بوضوح من هذه النتائج ان LIBS هي طريقة فعالة للتشخيص السريع لمشاكل الاسنان.


Article
Evaluation of the complications due to delayed management of trauma to anterior teeth

Author: Lubab J. Mohammed لباب محمد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2005 Volume: 17 Issue: 2 Pages: 93-96
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: Trauma to anterior teeth is a serious problem in young aged patients. This study was done to evaluate the complications that occur if treatment to the traumatized anterior teeth (primary or permanent) was delayed.Materials and Methods: Patients who came to the Department of Pedodontics and Preventive Dentistry at the college of dentistry / Baghdad seeking treatment of traumatized anterior teeth for esthetic or symptomatic reason were studied. Dental and medical history was taken, and the injured teeth were examined clinically and radiographically.Results: Most of the patients were late in seeking treatment month or more. Trauma which involves enamel and dentin was seen in (51) cases and pulp necrosis was seen in (43.1%) of these cases. Enamel and dentine fracture with pulp exposure (36 cases) showed a very high frequency of pulp necrosis (72.2%). External and internal root resorption were seen in only (13) cases of the (153) teeth examined.Conclusion: There is a need to educate the parents and the public about the seriousness of dental trauma and urge them to seek dental treatment as soon as possible. In addition a thorough clinical and radiographic examination is essential to identify the complications of dental trauma and treat them


Article
The Effectiveness of Using Pulpotec® in Treatment of Pulpitis by Pulpotomy of Vital Deciduous Molar and Vital Imma-ture Permanent Molar

Authors: Omar S Rahawi --- Baydaa A Al-Rawi --- Khudhair A Al- Salman
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2012 Volume: 12 Issue: 19 Pages: 185-190
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Aims: To evaluate the effect of two types of disinfectant solutions(2% alkaline glutaraldehyde, 1% sodium hypochlorite) in wettability of three types of elastomeric impression materials (light body) which are used in crown and bridge restorations at different times of immersion. Materials and me-thods: Three types of elastomeric impression materials (light body) were formed on a flat acrylic resin block and allowed to set(five specimens of each impression material was done for each immersion time(15,30 and60 minutes)of each disinfectant solution in addition to control groups). The wettability is indicated by measuring the contact angle of aqueous solution of CaSO4 on surface of cured impres-sion materials. Results: indicated no significant effect of immersion times on wettability of three types of impression materials. The hydrophilic type produce high wettability. Conclusions: The disinfectant solutions have different effects on each impression material. Sodium hypochlorite has the greatest beneficial effect on wettability


Article
THE IMMUNOLOGICAL AND ANTIBACTERIAL EFFECT OF Syzium aromatic EXTRACT ON BACTERIA ISOLATED FROM TEETH
التأثير المناعي والمضاد للبكتريا لمستخلص القرنفل على خمج الاسنان الجرثومي

Author: Rana A.Faaz * , Hanaa K. Ibrahem رنا عدنان فائز هناء خليل ابراهيم
Journal: Basrah Journal of Veterinary Research. مجلة البصرة للابحاث البيطرية ISSN: Print:18138497 E; 24108456 Year: 2014 Volume: 13 Issue: 1 Pages: 94-107
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

Seventy five samples were collected from human teeth of ages about (25-65)years from both sex . Several type of bacteria were diagnosed namely Staphylococcus .aurous (33.33%), E. coli (13.33%) , and Staphylococcus epidermis (22.66%) . Syzygium aromaticum crud extract were used as two type grinding and non-grinding .The minimum concentration of grinding type was( 0.6-2.6) mg/ml and the minimum concentration of non-grinding type was (0.533-2.1) mg/ml that inhibit bacterial growth of S .aurous and E. coli. Antibiotic sensitivity test was applied using discs diffusion method , the sensitivity was (92%) for Staph. aurous toward Kanamycin (K), and (80%) for E.coli toward Ciprofloxacin(Cip).The results showed that the resistance of Staph. aurous was 18(72)% toward Metromidazol(MET) , 22(88)% toward Bacitracin (B), E. coli was 8(80%) toward Streptomycin(S). The phagocytosis test or phagocytosis activity also included in this study.

الخلاصةتم جمع 75 عينة مابين الاسنان لاشخاص تتراوح اعمارهم بين (25-65 ) سنة من كلا الجنسين وشخصت انواع من البكتريا وكانت النسب كالتالي (33.33%)staph.aureus (22.66%) E.coli (13.33%) Staph.epidermicus .استخدم مستخلص نبات القرنفل Syzgium aromaticum بنوعين المطحون والغير المطحون حيث اطهرت النتاتج ان فعالية النوع المطحون افضل من النوع العير مطحون واستخدم التركير الادنى للمستخلص بشكله االمطحون ml /(0.6-2.6)mg الذي ثبط نمو بكتريا s.aureus وبكتريا E.coli والتركيز الادنى للمستخلص بشكله الغير مطحون 0.533-2.1)mg/ml) لتثبيط نمو بكتريا s.aureus ,E.coli .كما اجري اختبار المضادات الحياتية بواسطة الاقراص وكانت نسبية العزل عالية بالنسبة s.aureus , عالية وبلغت (92%) بوجود المضاد الحيوي Kanamycin(K)و وبالنسبة لبكتريا E.coliحوالي (80%) بوجود المضاد الحيوي Ciprofloxacin (Cip). واطهرت النتائج ان مقاومة بكترياStaph.aureus المعزولة بوجود المضاد الحيوي Metromidazol(Met) وكانت النسبة حوالي 18(72%) وحوالي 22(88%) بوجود المضاد الحيويBacitracin(B) .اما بكتريا E.coli المعزولة كانت مقاومة للمضاد الحيوي Streptomycin (S) بنسبة 8(80%). كما استخدم هده الدراسة اختبار كفاءة عملية البلعمة .

Keywords

Teeth --- Kanamycin --- Bacteria


Article
The validity of mucolabial reflection in determining occlusal vertical relation

Loading...
Loading...
Abstract

Background: Different methods are being used in prosthodontics for determiningocclusal vertical dimension. In this study the mucolabial reflection was used as aguide to measure the vertical distance of the maxillary and mandibular centralincisors to the vestibules.Materials and Methods: A total sample of 45 subjects was studied that include (25female and 20 male). Impression of the maxillary and mandibular arch was madewith perforated tray using alginate impression material. Stone casts were madeand the distance from the center of the incisal edge for maxillary and mandibularcentral incisors to the depth of the mucolabial reflection was measured. Also thedistance from the depth of the maxillary to mandibular reflection with cast incentric occlusion was measured. The measurements were recorded by the use of adivider and boley gauge to the nearest 0.1 mm.Results: The mean distance from the incisal edge of maxillary central incisors to themucolabial reflection was 21.1 mm for females and 21.8 mm for males while themean distance from the mandibular central incisors to the mucolabial reflectionwas 16.6 mm for females and 16.9 mm for males. Also the mean distance from thedepth of the maxillary to the Mandibular mucolabial reflections was 34.9 mm forfemales and 35.3 mm for males. No statistical significant differences were foundbetween male and female measurements.Conclusion: The mucolabial reflection provides a good starting point for establishinga tentative occlusal vertical dimension. Also could help for a preliminaryarrangement of teeth.


Article
Surgical Exposure and Orthodontic Treatment of Impacted Maxillary Central Incisors. A Case Report

Author: Khudair A Al-Jumaili
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 22 Pages: 259-265
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Aims: This report describes a case of eleven years old female with impacted maxillary central incisors and presence of two supernumerary teeth .The surgical exposure and orthodontic traction of bilaterally impacted central incisors after removal of impacted supernumerary teeth is presented in this report. Materials and Methods: Clinical, radiographic follow-up and treatment was conducted at the department of orthodontic and maxillofacial surgery in the college of dentistry ,mosul university .The surgical removal of supernumerary teeth done then surgical exposure and orthodontic traction done. Results: The impacted maxillary central in-cisors were successfully positioned and presented an acceptable gingival contour after treat-ment. Conclusion: Maxillary permanent central incisors were successfully positioned in the maxillary arch by surgical exposure and orthodontic traction, which showed good stability.


Article
Congenitally missing and supernumerary teeth among a group of 3-12 years old children with cleft lip and/ or palate in Iraq

Authors: Zainab J. Ja'far --- Ban Ali Salih بان علي صالح
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2015 Volume: 27 Issue: 2 Pages: 148-153
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: There are many congenital anomalies associated with cleft lip and/or palate. This research is to studythe prevalence of congenitally missing teeth and supernumerary teeth in this population group.Materials and Method: One hundred eight cleft lip and/or palate Iraqi patients had participated in this study (57male, 51 female), 3-12 years of age. 26 of them had orthopantomogram were within (6-12) years of age wereinspected for congenitally missing teeth and supernumerary teeth. Patients whom age range 3-5 years werechecked for the congenitally missing teeth by clinical examination with strongly insisting the teeth were not misseddue to caries or trauma.Results: There were 19(73.076%) patients with 41 congenitally missing teeth for the 26 patients within 6-12 years agegroup who were with orthopantomogram, while there were 20(37.037%) patients with 32 congenitally missing teethfor the 54 patients within 3-5 years of age who were not indicated for orthopantomogram. There were (22) patientwith (27) supernumerary teeth.Conclusion: The most frequently congenitally missing tooth was the permanent upper lateral incisor, on the otherhand the tooth most frequently noted as extra tooth was the primary lateral incisor. Majority of them were with cleftlip and palate


Article
Evaluation of the incisive papilla as a guide to the maxillary central incisors and canine teeth position in Iraqi and Yemenian samples

Author: Hanan A. Khalaf* BDS, MSc
Journal: Journal of the Faculty of Medicine مجلة كلية الطب ISSN: 00419419 Year: 2009 Volume: 51 Issue: 2 Pages: 146-150
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Back ground: This study was conducted to estimate the relation ship of the incisive papilla to the antero posterior arrangement of the maxillary anterior teeth in a two different groups (Iraqi and Yemenian groups), because incisive papilla is considered as a reliable and relatively stable anatomic land mark.Materials and Methods: Maxillary and mandibular stone casts were collected from 100 dental students, (50) of Iraqi dental students in Baghdad university and (50) of Yemenian dental students in Ibb university at the 3rd and 4th classes. Age ranged from 21-25 years. Alginate impression, dental stone, stock trays were used. Photographic technique was used to measure anatomic land marks located on dental casts. A computerized digital caliper (CDC) tool was used in the measurements which were made on scanned images of dental casts .The distances from midpoint and posterior point of incisive papilla were measured .The area on the incisive papilla where the inter canine distance passed was noted , paired t- test and chi-square test were used to analyze the data.Result: the data obtained suggested that the distance from the labial surface of maxillary central incisors was ranged from 8.9 to 9.92 mm from the midpoint of incisive papilla, this measurement was 8.9 mm in Iraqi sample and 9.92 mm in Yemenian sample. Also the distance from the from the labial surface of maxillary central incisors was ranged from 11.33 to 12.34 mm from the posterior border of incisive papilla , this measurement was 11.33 mm in Iraqi sample and 12.34 mm in Yemenian sample The mean distance of the inter canine line joining the canine cusp tips was 31.9 mm in Iraqi sample and 35.66 mm in Yemenian sample. The differences between Iraqi and Yemenian scores (distance from the labial surface of maxillary central incisors to the mid point and posterior border of incisive papilla in addition to the scores of inter canine distance) were statistically significant (p<0.05). Gender had no significant effect on the relationship of the incisive papilla to the maxillary anterior teeth in both Iraqi and Yemenian samples.Conclusion: These results suggested that there is a relation ship between the maxillary central incisors, canines and incisive papilla aiding in their antero posterior position. Gender did not affect the measurements. Furthermore, these measurements showed a statistically significant difference between Iraqi and Yemenian samples .The clinical revelance of this study lies in application of incisive papilla as a starting point in the preliminary location of maxillary incisors and canine teeth during construction of dentures.


Article
USE OF TEETH SAMPLES FOR GENDERDETERMINATION BY PCR IN IRAQI CASE
PCR إستعمال عينات الأسنان لتحديد الجنس بتقنية

Author: عبد الأمير محمد غريب
Journal: Iraqi Journal of Biotechnology المجلة العراقية للتقانات الحياتية ISSN: 18154794 Year: 2010 Volume: 9 Issue: 4 Pages: 819-827
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

ABSTRACT
Identification by DNA analysis has proven valuable when the use of traditional
forensic identification methods such as fingerprints or dental radiographs is difficult
or impossible in situations such as explosions. Identification is even more difficult
because human remains are often fragmented and may be commingled. Teeth are a
useful source of DNA and can often survive extreme environmental conditions. DNA
were extracted from 10 male and 10 female teeth samples ranging in age from 24 to 47
year subjects for dental treatments were used as material that contains the
Amelogenin gene(amel), which is the key of sex determination in our study .PCR
reaction was performed for a series of dilutions prepared from 10ng DNA to assess
the minimal amount of DNA required for PCR amplification which is the primary
concentration of the extracted DNA from dental materials of all 20 samples. The PCR
products of the 1:100 DNA dilutions which is consider the optimum concentration.
The polyacrylamide gel showed two bands with molecular weight (218bp and 212bp)
for male samples and one band with molecular weight (212bp) for female samples.
The results shown that the amel gene serves as a good marker for sex determination in
the Iraqi population and the PCR-based method was sensitive and proved to be
successful for sex determination with a complete specificity.
Key words: Gender determination, PCR, Amelogenin, Teeth.
*To whom correspondence should be addressed (E-mail:amgb772005 @yahoo.com)

الخلاصةتبرز أهمية الإعتماد على تحاليل الدنا للتعريف بالأشخاص الذين تعرضوا لحوادث مأساوية مثل الإنفجاراتعندما يكون إستعمال طرائق التحقيق الجنائي مثل التصوير الإشعاعي للأسنان أو بصمات الأصابع صعباً أومستحيلاً. تٌعد الأسنان من أهم المصادر الحيوية للحصول على الدنا لما تتميز به من قوة ومقاومة للظروفالقاسية التي ترافق الحوادث وخاصة عند تمزق وإختلاط أشلاء الضحايا. تم إستخلاص الدنا من 20 عينة لأسنان47 ومن المفترض - مصابة بالتسوس تعود لذكور وإناث خضعوا لمعالجة طبيب الأسنان تتراوح أعمارهم بين 24أن تكون عينات الدنا تحتوي على جين الأميلوجنين الذي تم إعتماده في تحديد الجنس. اُجريت التفاعلات السلسليةلبلملرة الدنا المستخلص بعد إجراء سلسلة من التخافيف لتقدير أقل كمية من التركيز المطلوب للتفاعل إذ كانالتخفيف الأمثل 1:100 بالنسبة للدنا ذات التركيز الأولي ( 10 نانوغرام). أظهرت نتائج ترحيل هلام متعددالأكريلمايد وجود حزمتين للعينات المأخوذة من ذكور بوزن جزيئي 212 و 218 قاعدة نايتروجينية على التواليبينما ظهرت حزمة واحدة مع العينات المأخوذة من إناث بوزن جزيئي 212 قاعدة نايتروجينية. بينت النتائجإمكانية إعتماد جين الأميلوجنين كمؤشر جيد في تحديد الجنس في المجتمع العراقي كما أظهرت مدى حساسيةونجاح تقنية التفاعل السلسلي لبلمرة الدنا في إجراء هذا الإختبار

Keywords

Gender determination --- PCR --- Amelogenin --- Teeth.


Article
An evaluation of the effect of retention means on increasing the debonding strength of the denture acrylic teeth attached to the denture base resin

Author: Abbas F. Al-Huwaizi عباس فيصل الحويزي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2005 Volume: 17 Issue: 1 Pages: 14-17
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: The debonding of acrylic teeth from the denture base is a challenging problem to the dentist and dental technician in which special means must be done to increase the debonding strength of the tooth.Material and method: Sixty specimens of acrylic central incisors were attached to acrylic rods and grouped into 5 groups according to the shape of the retention means placed at the tooth ridge lap. The specimens were strained under tension to examine their debonding strength.Results: The teeth with serrations (Group 2) have shown to be the most effective mean of increasing debonding strength, followed by the 2 longitudinal grooves (Group 4) where the difference between these groups was insignificant. Then followed by the teeth with 4 holes, and finally the difference between the teeth with a central groove and the control group were insignificant.Conclusions: It is recommended that the tooth ridge lap should be serrated with a fissure groove or placement of the 4 grooves to increase the debonding strength of the tooth.

Listing 1 - 10 of 89 << page
of 9
>>
Sort by
Narrow your search

Resource type

article (87)

journal (2)


Language

English (78)

Arabic (3)

Arabic and English (1)


Year
From To Submit

2019 (2)

2017 (8)

2016 (9)

2015 (4)

2014 (9)

More...