research centers


Search results: Found 5

Listing 1 - 5 of 5
Sort by

Article
Controversy of Retention after Dento-Alveolar Expansion (Clinical Study)

Author: Arkan Muslim Al Azzawi
Journal: Medical Journal of Babylon مجلة بابل الطبية ISSN: 1812156X 23126760 Year: 2016 Volume: 13 Issue: 1 Pages: 1-6
Publisher: Babylon University جامعة بابل

Loading...
Loading...
Abstract

Maxillary constriction whether unilateral or bilateral still one of the most important problem in orthodontics thus aim of this articleto test hypothesis that Maxillary expansion may be combined with or without retainers for complete treatment due to expansion treatment taken a couple of months while the expander was not removed for several more months to keep teeth from relapse. Twenty patients with an age ranged between 17-22 years old, had posterior bilateral buccal cross bite 5 mm or less based on Angle' classification malocclusion were selected in this study. All of them were white Iraqi Arab in origin and had full permanent dentition regardless the wisdom teeth with minimal crowding (1-2mm). Sample classified in to two groups (A) and (B) of 10 patient and study model was taking preoperatively, after 4 month and after 12 month respectively. Transpalatalbarconstructed and cementedat the same time of hyrax removal, this is procedure prepared for group (B), while for group (A) Hyrax removed and just take impression without TPB and at that time sequence of main arch wire continue and all cases finished with 019*025 mil Nickel Titanium arch wire.Inter-cuspal premolar distance showed significant relapse (1.79 mm) occurred in none retention group (A) between 4 and 12 month this is not present in retention group(B) amount of relapse was none significant (0.05). While there was significant difference in inter-cuspalmolar group A equaled to (1.48mm) and group B equaled to (1.38).Analysis of relapse in group A and group B clarifying that the use of Trans-Palatal arch as retention after hyrax expander didn’t increasedento-alveolar stability.


Article
Influence of Aluminum Oxide Conditioning Before Acid Etching on Tooth Surface: an Experimental Study

Author: Arkan Muslim Al Azzawi
Journal: Medical Journal of Babylon مجلة بابل الطبية ISSN: 1812156X 23126760 Year: 2016 Volume: 13 Issue: 1 Pages: 105-109
Publisher: Babylon University جامعة بابل

Loading...
Loading...
Abstract

Aim of the present study, examination of enamel roughness in palatal aspect of extracted premolars by using aluminum oxide (25%, 27% and 28% µm and phosphoric acid 37%. Twenty of all samples contoured with cylindrical shape forming wax and poured with stone to form cylindrical shape and palatal surface remain fully visible and this surface cleaned and polished with plastic cup and pumice and rinsed with distal water and dried with air. Data divided to 4 group each one is 5 extracted teeth and variable assessed by picture captured before and after adding conditioning material by using camera, light microscope,analyzed by Autocad 3D max and electronic microscope with its three dimensional software. The result of this article clearly there is significant difference between groups with different conditioning materials also the pattern of enamel surface showing highly significant difference. This study approved that the palatal animal conditioned with aluminum oxide particles of 25%, 27%, and 28% µm before conditioned by acid etch result in greater scratched and introduce more regular pattern than that using of phosphoric acid only.


Article
Clear and Fixed Retainer's Outcomes After Orthodontic Ally Treated Open Bite Cases : Clinical Study

Author: Arkan Muslim Al-Azzawi
Journal: Medical Journal of Babylon مجلة بابل الطبية ISSN: 1812156X 23126760 Year: 2016 Volume: 13 Issue: 2 Pages: 271-276
Publisher: Babylon University جامعة بابل

Loading...
Loading...
Abstract

There is currently a lack of scientific evidence to about prolong retention of open bite malocclusion, from this point of view the idea of this paper start to feel free to change the protocol of wearing of clear retainer in open bite malocclusion because great satisfactions of patients to this type of retainers to see the final outcome of clear and fixed retainer in retention of orthodontic ally treated open bite cases. A sample of 15 orthodontics patients suffer from open bite malocclusion included in this study and 10 of them selected to be involved in this comparative study and 5 cases excluded because the discontinue the consent form of this research. Patient’s age ranging from 16 -20 years old. The overbite measurements were done over three time frames these were zero day time of removal of fixed appliances and after six months and after one year by digital vernia. The result of the present study was encouraging to change the protocol of wearing of clear retainer with the help of fixed upper and lower from canine to canine retainer thus repeated measures ANOVA test shows highly significant difference between overbite measurements over three periods of time and Bonferroni test clarify there is highly significant difference between time frame measurements. In conclusion to this paper the holy recommendation for retention after orthodontically treated open bite cases is using clear retainer in upper arch and upper and lower canine to canine fixed retainers with change of protocol of wearing of clear retainer to 24 hours except meal time at least for six month and if extended to one year this will give marvelous result in regards to overbite measurements this will apparently improve the overbite measurement.


Article
Assessment of Skeletal and Dental Pattern of the Mandible of Class II Division 1 Malocclusion.[A Comparative Cephalometric Study]

Authors: Arkan Muslim Al-Azzawi --- Wisam Wahab Sahib --- Thaer Jaber Al-Khafaji
Journal: kufa Journal for Nursing sciences مجلة الكوفة لعلوم التمريض ISSN: 22234055 Year: 2011 Volume: 1 Issue: 1 Pages: 17-48
Publisher: University of Kufa جامعة الكوفة

Loading...
Loading...
Abstract

Abstract:
Class II division 1 malocclusion represents the most common skeletal discrepancy which orthodontists see in daily practice. The understanding the morphology of the mandible is a key element in diagnosis and treatment planning in the field of orthodontics and orthoganathic surgery. This study provides new information about the skeletal and dental pattern of the mandible with class II division1, based on skeletal II for Iraqi adult sample aged (18 - 26) years in comparison with normal occlusion by means of cephalometric measurements used by clinical practitioners. (20) males and (21) females with a skeletal Class II were chosen and compared with (26) males and (28) females with normal occlusion by using the (ANB) angle. Nine angular measurements and eight linear measurements have been used in this study and the results were as follows: When the angular and linear measurements of skeletal class I and II overall ,males and females samples were compared, the retrusion of mandible with a short length of the ramus and a tendency of a backward rotation of the mandible in relation to the cranial base in skeletal class II are the most important causes of class II malocclusion with the facial profile is more convex in skeletal class II overall and males samples while, all the angular and linear measurements used in this study show no significant difference between skeletal class I and II females, except the facial profile is more convex in skeletal class II females sample. The lower incisors is more procline in class II than in class I overall sample but this difference is not statistically significant in males and females sample. No significant difference could be noted between sexes of skeletal class II in the angular measurements. Most linear measurements were larger in males than in females class II division 1 except for two measurements the posterior cranial base length and the length of the body of the mandible show no significant difference between class II division 1 males and females.

الخلاصة:

الصنف الثّاني قسم الاول من سوء الاطباق يُمثّلُ التعارض الهيكليَ الأكثر شيوعاً الذي يَراه اختصاصي تقويم الاسنان في الممارساتهم اليوميةِ. فَهْم شكل الفَكِّ السفلي هو عنصر رئيسي في التشخيصِ وخطة المعالجةِ في حقلِ تقويم الأسنان والجراحة التجميلية. تُزوّدُ هذه الدراسةِ معلومات جديدةً حول النمط الهيكليِ و الأسنانِ للفَكِّ السفلي للصنفِ الثّاني قسم الاول للصنف الهيكلي الثّاني لعيّنةِ العراقيين البالغين بعمرِ (18 - 26) سَنَوات بالمقارنة بالاطباقِ الطبيعيِ بواسطة المقاييسِ الإشعاعية القياسية للرأس المستعملة من قبل الممارسين السريريينِ. (20) ذكور و(21) إناث للصنف الهيكلي الثّاني إخترتْ وقُارنتْ مَع (26) ذكور و(28) إناث لصنف الاطباقِ ِ الطبيعيِ بإستعمال زاوية (ANB ). تسعة مقاييسِ زاويةِ وثمانية مقاييسِ خطيّةِ إستعملتْ في هذه الدراسةِ والنَتائِجِ كَانت كالتّالي: عندما قُورنتْ المقاييس الزاوية والخطيّة للصنفِ الهيكليِ الاول والثّاني عموماً، عينات الذكور والنساء ، ارتداد الفَكِّ السفلي مَع قصر طول ramus و ميل للدوران الخلفي للفَكِّ السفلي بالعلاقة مع القاعدةَ القحفية في الصنفِ الهيكليِ الثّاني هي الأكثر الأسبابَ أهميةً والمؤدية لصنفِ سوء الاطباق الثّاني مع الجانبية ألوجهية أكثرُ تحدّباً في الصنفِ الهيكليِ الثّاني للعينات العامّة والذكور بينما، كُلّ المقاييس الزاوية والخطيّة إستعملتْ في هذا الدراسةِ لا إختلافَ هامَّ بين الصنفِ الهيكليِ الأول والثّاني إناث، ماعدا الجانب ألوجهي أكثر محدّبةُ ُ في الصنفِ الهيكليِ الثّاني للعينات النسائية. إنّ القواطعَ السفلية procline أكثر بروزا في الصنفِ الثّاني مِنْه في الصنفِ الاول للعينةُ عموماً لكن هذا الإختلافِ لَيسَ هامَّ بشكل إحصائي في العيناتِ الذكورِ والنساء. لا إختلافَ هامَّ يُمْكِنُ أَنْ يُلاحظَ بين أجناسِ الصنفِ الهيكليِ الثّاني في المقاييسِ الزاويةِ. معظم المقاييسِ الخطيّةِ كَانتْ أكبر في الذكورِ مِنْ صنفِ الإناث لسوء الطباق الثّاني قسم الاول ماعدا مقياسي طول القاعدة القحفية الخلفية وطول جسمِ الفَكَّ السفلي لا إختلافَ هامَّ بين ذكورِ وإناث الصنفِ الثّاني القسم الأول.

Keywords


Article
Effect of Time and Intensity of Curing Unit on Bond Strength of Stainless Steel Orthodontic Brackets (in vitro study)

Authors: Issam Merzah Abdullah --- Kasem Ahmed Abeas --- Lamis Khidher Mohammed --- Arkan Muslim Al-Azzawi
Journal: Medical Journal of Babylon مجلة بابل الطبية ISSN: 1812156X 23126760 Year: 2017 Volume: 14 Issue: 3 Pages: 532 -536
Publisher: Babylon University جامعة بابل

Loading...
Loading...
Abstract

This in vitro study was aimed to evaluate the shear bond strength of orthodontic brackets that be cured with two types of light emitting diode (LED).Thirty extracted premolar teeth were divided arbitrarily into two groups. Each one of these groups consisted of 15 teeth framed in an acrylic block. After standard enamel etching procedure, each orthodontic brackets were cured on the first group of teeth with low intensity curing unit (1000-1200mW/cm2) for 20 second, the second group with high intensity curing unit (5000-6000 mW/cm2) for 6 second. For each bracket, its strength of shear bond was tested with a universal computerized testing machine. The results showed that brackets cured with low intensity LED produced the highest shear bond strengths (36.6 MPa) while with high intensity show (33 MPa) with no significant difference was found between them. the study can recommend the high intensity LED curing units as this can save time and decrease chair time.

Listing 1 - 5 of 5
Sort by
Narrow your search

Resource type

article (5)


Language

English (4)


Year
From To Submit

2017 (1)

2016 (3)

2011 (1)