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Article
Computed tomography bone density in Hounsfield units at dental implant receiving sites in different regions of the jaw bone

Author: Lamia H. Al-Nakib لمياء حامد النقيب
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 1 Pages: 92-97
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Determination of local bone mineral density (BMD) with cortical thickness and bone height may offer acomprehensive description of the bone the surgeon will encounter when he or she actually sets the implant.Quantitative computed tomography (CT) (i.e., quantitative interpretation of values derived from Hounsfield units witha suitable calibration procedure) is the modality of choice to determine BMD. The aim of the present clinical study isto determine the local bone density in dental implant recipient sites using computerized tomography.Material and method: The sample consisted of (72) Iraqi patients whom referred to Al-Kharkh General hospital, SpiralCT scan Department for bone quality and quantity assessment after one week of dental implants insertion, theaverage of bone density was measured for 120 areas indifferent sectors of maxilla and mandible in Hounsfield unite.Results: As a mean, males show higher bone density than females, decreased with increased age significantly,mandible show significantly higher bone density than maxilla. Maxilla revealed no significant difference between thethree sectors, while in the mandible there was significant difference between posterior sector (613.1HU)and bothanterior (821.3 HU) and premolar sectors (779.6 HU) with no significant difference between anterior and premolarsectors.Conclusion: CT-Scan may provide a valuable aid to predict bone quality at potential implant sites and could beused to assess the change of bone density around dental implants

مع سماكة القشرة العظمية و ارتفاع العظم قد تقدم وصفا شاملا للعظم للجراح ليحدد امكانية زراعة الأسنان بالاعتماد على قياس ) BMD( معلومات أساسية : تحديد كثافة العظامإن الهدف من هذه الدراسة السريرية الحالية هو تحديد كثافة العظام المحلية في بعد غرز الزرعات السنية .)CT( الكثافة العظمية بوحدة هاونسفيلد بواسطة التصوير المقطعيبأسبوعبوحدةهاونسفيلد باستخدام التصوير المقطعي.طرق البحث: تم قياس متوسط كثافة العظام ل 27 مريض بوحدة الهاونسفيلد باستخدام الأشعة المقطعية في مستشفى الكرخ العام ، قسم الاشعة المقطعية ل 071 لمنطقة ما حولالزرعهفي مختلف مناطق الفكين العلوي والسفلي .النتائج:كثافة العظم تكون اكبر عند الرجال والأصغر سنا وفي الفك السفلي اكثر من لعلوي. ولا توجد فروقات محسوسة بين مناطق الفك العلوي, لكن في الفك السفلي هناك فرق بينالمقطع الخلفي عن المقطعين الأمامي والضواحك.الخلاصة: الأشعة المقطعية قد توفرمساعدة قيمة للتنبؤ بجودة العظام في مواقع زرع المحتملة ويمكن أن تستخدم لتقييم التغيرفي كثافةالعظم حول الزرعات السنية.


Article
Validity of computed tomographic in assessment of genial tubercle and anterior mandible as a reference guide to locate osteotomy in genioglossus advancement

Authors: Hanan J. Kadem --- Ahlam A. Fatah
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 3 Pages: 63-65
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Genioglossus advancement is a surgical procedure to advance the tongue in some patients withobstructive sleep apnea syndrome.The important step in this procedure is that of accurately capturing the bonesegment attached to the genioglossus muscle to avoid complications such as mandibular fracture, devitalization ofthe inferior incisor roots, and incomplete incorporation of the genioglossusMaterials and Method: Computed tomography scans were taken for 53 Iraqi adult patients (28 male and 25 female)range from (18-35) years with skeletal class I classification and intact anterior mandible dentition included in this studyusing sagittal and axial sections. The measurements were done for genial tubercle and anterior mandibular region.Results: The mean values of some measurements weresignificantly higher in males than in females. The effect ofgender difference was evaluated as a strong effect. The mean value of the other measurements slightly higheramong males compared to females, but the difference fail to reach the level of statistical significance. The effect ofgender difference on this parameter was evaluated as a moderately strong effect.The results showed that there wasno effect of age on all selected measurements in male and female. All selected measurements showed nostatistically significant linear correlation with the age.Conclusions: The variable position and dimensions of this bone segment among patients suggest the need for CTbefore attempting genioglossus advancement for exact localization, avoiding the expected surgical complication


Article
Assessment of bone density after six months from dental implants placement using Computed Tomography

Author: Resha J. Al-Sudani رشا جميل السوداني
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 4 Pages: 126-128
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Determination of local bone mineral density (BMD) immediately after implant insertion play animportant role in implant success rate, may offer comprehensive description of the bone, and give enoughinformation to the surgeon prior to implant insertion and at follow up status. The aim of the present study is toevaluate the changes of local bone density in the dental implant recipient sites by using computerized tomography.Material and method: The sample consisted of (20) dental implants recipient sites, bone density assessment was donetwice, immediately after implants insertion and after six months.Results: The mean HU of the bone around the implant insertion site, immediately after implant placement was 552.28HU, and increased to761.33HU after six months. According to gender, with females, it was 539,54HU, and increased to765.65HU after six months from implant insertion while with males, it was 565.02HU, and increased to 757.02HU after sixmonths from implant insertion.Conclusion: There was an increased in bone density around dental implant by time with non-significant differencesaccording to the gender.

الخلفیة: تحدید كثافة العظام قبل وبعدغرزالزرعات السنیة من الامور المھمة جدا في نجاح زراعة الاسنان. إن الھدف من ھذه الدراسة السریریة الحالیة ھو تحدیدكثافة العظام بعد عملیة زراعة الاسنان.طرق البحث: تم قیاس متوسط كثافة العظام ل 20 زرعة بوحدة الھاونسفیلدباستخدام الأشعة المقطعیة ، ا لمنطقة ما حول الزرعھفي مختلف مناطق الفكین العلويوالسفلي.بعد الزراعة مباشرة وبعد مرور 6 اشھر من زراعة الاسنان.النتائج: متوسط كثافة العظم حول الزرعة السنیة مباشرة بعد غرز الزرعة كان ما یعادل 552.28 وحدة قیاس الكثافة, حیث انھا ازدادت لتصل الى 761.33 وحدةبعد ستة اشھر من غرز الزرعة, معدل كثافة العظم بعد غرز الزرعة مباشرة عند الرجال 565.02 وحدة وبعد مرورستة اشھر ازدادت لتصل 757.02 وحدة اماعند النساء 539.54 وحدة مباشرة بعد الغرز وبعد ستة اشھر ازدادت لتصل 765.65 وحدة.الاستنتاج :كثافة العظم تزداد بعد مرور 6 اشھر من زراعة الاسنان وتكون نسبة الزیادة متساویة عند الرجال والنساء بفارق غیر محسوس احصائیا.


Article
Comparison of Three Dimensional Dental Software Computed Tomography Findings with Real Time Surgical Approaches for Impacted Teeth

Authors: Nazhat M. Abdlkareem --- Shefaa H. AL-Nuome --- Haider A. Rassul --- Taha Y.Hamad
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2014 Volume: 3 Issue: 1 Pages: 113-122
Publisher: Tikrit University جامعة تكريت

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Abstract

An exact localization of impacted teeth is often difficult to assume by using two dimensional conventional radiological techniques like OPG or dental films. In contrast to these two dimensional imaging method, the Dental slice Software Computed Tomography offers a three-dimensional imaging of maxilla-facial region, providing the opportunity to study objectives in all standard plans with three-dimension, reconstructed and multisection views. The aim of this study is to prove the effectiveness of the Dental slice Software Computed Tomography in evaluating the position of impacted teeth as a presurgical diagnostic aid. 25 patients with total of 40 impacted teeth were classified and evaluated by three sets .The first set of radiographs consist of traditional two dimensional images(per apical , occlusal films and OPG).The second set comprised three-dimensional views obtained from a Dental slice Soft ware Computed Tomography and a third set which was surgical interventions results. Teeth crowns were classified into: type I (buccal or labial), type II (palatal or lingual), type III (half distance of the labio-palatal or bucco-palatal ,labio-lingual or bucco-lingual) according to their position within dental arches. The dental soft ware Computed Tomography succeeded to identify the exact situations of whole 40(100%) impacted teeth crowns that were confirmed surgically in the same anatomical locations. On the other hand there was a Failure of 33(82.5%) crowns that could not be determine their positions by two dimensional images and proved surgically in opposite sides. Three dimensional Computed Tomography is a helpful and stimulating tools by providing the surgeons a perfect mulitislices: axial, coronal, sagital, two dimensional and three dimensional images in one visit and once exposure and permits the oral surgeons to visualize the position and surgical anatomy of the tooth as it will be in the operating theatre, thus establishing sufficient patterns for adequate surgical planning ,reduce of need for exploratory procedures with less morbidity to the osseous structure and time saving.


Article
An evaluation of canal transportation and centering ability at different levels of root canals prepared by self-adjusting file using computed tomography (A comparative study)

Authors: Farah Salahalden Abbas فرح صلاح الدين عباس --- Hikmet A. Sh. Al-Gharrawi حكمت الغراوي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 1 Pages: 16-23
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The new concepts and technologies continue to change the dynamics of endodontic practices in the world. Rapid and significant changes in techniques, instrument design, and the type of metals used to manufacture endodontic instruments which have been made during the last few years in an attempt to overcome canal preparation errors. The purpose of this study is to measure and compare canal transportation and centering ability of Self Adjusting File with two rotary nickel-titanium (Ni-Ti) systems, ProTaper and BioRaCe at different levels.Material and Methods: Forty five distal roots of mandibular first molars with moderate curvature were selected using Schneider method. Roots were divided randomly into 3 groups of 15 each and were scanned using Computed Tomography (Initial scan). After canal preparation with ProTaper (group A), BioRaCe (group B), and Self Adjusting File (group C) the roots were rescanned (Final scan), the degree of canal transportation and centering ability were assessed at apical (4 mm), middle (6 mm), coronal (9 mm) sections using computed tomography. The collected data were statistically analyzed using ANOVA and Least Significant Difference tests.Results: There were no statistically significant differences among the groups at level 4 mm and level 9 mm (P ˃ 0.05). However, at level 6 mm there was a highly significant difference between (A) and (B) groups (P ˂ 0.01) and there was a significant difference between (A) and (C) groups (P ˂ 0.05). There were no statistically significant differences among different levels of (A) and (C) groups (P ˃ 0.05), while (B) group showed a highly significant difference between 4 mm and 9 mm levels and between 6 mm and 9 mm levels (P ˂ 0.01). Regarding canal centering ability, there was no statistically significant difference among the three groups at different levels (P ˃ 0.05)., while (B) group showed a significant difference between 4 mm and 9 mm levels (P ˂ 0.05), and a very highly significant difference between 6 mm and 9 mm levels (P ˂ 0.001).Conclusion: The study demonstrated that canal preparation with the three designs of Ni-Ti instruments produced canal transportation. Self Adjusting File group showed less canal transportation than ProTaper group. There was a comparable value of canal centering ability among different levels in each group except in BioRaCe group


Article
Accuracy of spiral computed tomography in evaluation of maxillary sinus septa among dentate and edentulous Iraqi subjects (Comparative study)

Authors: Farah Abdul Salam Hadi فرح عبد السلام هادي --- Ahlam A. Fatah احلام فتاح
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2014 Volume: 26 Issue: 2 Pages: 64-68
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Presence of maxillary sinus septa has been known to be a complicating factor for sinus elevationprocedure and implant placement in posterior maxilla. The maxillary sinuses septa are thin walls of cortical boneinside the sinus. They vary in number, location, and height. This study aimed to discover the accuracy of SpiralComputed Tomographic Scan in evaluation the maxillary sinus septa (prevalence, location, height) in subjects withdentate, partially edentulous and completely edentulous maxilla.Material and method: This study included (267) subjects ranged from (20-70 years), (132) male and (135) femaledivided into three groups, (97) fully dentate group, (102) partially edentulous group and (68) completely edentulousgroup who admitted to Spiral Computed Tomography Scan in Al-Karkh General Hospital in Baghdad to haveComputed Tomography Scan of the brain and paranasal sinuses for different diagnostic purposes from November2012 to April 2013. The maxillary sinus septa were evaluated in the axial and sagittal views and the data weresubjected to statistical analysis using Statistical Package for Social Sciences version 20.Result: The prevalence rate of septa was 77.3% among fully dentate maxilla sample. Almost the same prevalencerate was obtained in the other two study sample (partially edentulous maxilla 77.5% and completely edentulousmaxilla 76.5%).No important or statistically significant difference in prevalence was observed between the threestudy groups. Age and gender showed no important or statistically significant difference in prevalence rate in eachstudy group, the mean septal height was slightly higher in fully dentate group (7mm) compared to partiallyedentulous maxilla group (6.2 mm) and completely edentulous maxilla group (6.5 mm). The difference in meanbetween the 3 groups however was not significant statistically. The rate of septa at floor position was significantlylowest in fully dentate maxilla group (36.1%) compared to partially edentulous maxilla group (52.1%) and completelyedentulous maxilla group (53.3%).Conclusion: Spiral Computed Tomography is a precise diagnostic tool for the examination of this zone capable forinvestigating their location and height during different maxillary sinus surgical procedures. In the posterior maxilla,regardless of type of ridge (atrophy/edentulous or non-atrophy/dentate), the anatomical variation of sinus septa isdiverse in its prevalence and location


Article
Evaluation of Density and Homogeneity of Three Different Root Canal Obturation Techniques: A Three –Dimensional Computed Tomography In Vitro Study

Author: Ahmed S. Mustafa
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2014 Volume: 3 Issue: 1 Pages: 17-23
Publisher: Tikrit University جامعة تكريت

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Abstract

The aim of this in vitro study was to compare three dimensionally the density and homogeneity of cold lateral compaction, warm vertical compaction and guttaflow root canal obturation techniques using computed tomography. Thirty canals of 12 mm from extracted lower single canal premolars were selected then instrumented and divided randomly into 3 groups with 10 roots in each group. Group I was obturation with cold lateral compaction technique, group II was obturated with warm vertical compaction technique and group III was obturated with guttaflow system. The specimens were then analyzed for the density and homogeneity in both vertical and horizontalsections in apical, middle and coronal third with 1 mm section thickness using computed tomography. The data obtained in hounsefield units were subjected to statistical analysis. In conclusionguttaflow was superior in the apical part and none of the tested obturation techniques can achieve three dimensional dense and homogenous obturation from apical to coronal parts of root.


Article
Automated ovarian masses extraction in CT images based on division of image

Author: Amel Hameed Khaleel امل حميد خليل
Journal: Journal of Al-Qadisiyah for Computer Science and Mathematics مجلة القادسية لعلوم الحاسوب والرياضيات ISSN: 20740204 / 25213504 Year: 2014 Volume: 6 Issue: 1 Pages: 11-27
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

Medical image processing is the most challenging field now a days. Processing of CT ovarian images is one of the part of this field.The goal of this work is to present a method for detection of ovarian mass from Computed Tomography Image and determine location as well as calculation area of it. Preprocessing of the CT image includes image resizing, conversion to gray and enhancement makes it ready for applying the processing phase which applied operations on processed image by histogram and marker controlled watershed segmentation to segment it to a set of segment that collectively cover the entire image ,then apply morphological operations to visualize only parts of masses in CT images. Because of the nature of ovarian CT images which contain left and right lobes, a proposed algorithm to division the images after extraction the masses into two images and then apply algorithm to calculate the area of mass in each parts of image. when execute the proposed method, the results obtained are good compared with calculation area of the mass of the ovarian extracted by the region of interest algorithm (ROI) using cursor. A detailed procedure using Matlab (R2010a) software is written to extract mass region in CT Scan ovarian Image.


Article
Accuracy of ultrasound versus computed tomography in diagnosis of maxillary sinusitis
فعالية فحص الأمواج فوق الصوتية بالمقارنة مع المفراس الحلزوني في تقييم أمراض الجيب الوجني

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Abstract

Background: ultrasound offers non-invasive, rapid and simple method for confirming the clinical diagnosis of maxillary sinus pathologies.Objective: to evaluate the accuracy of real time ultrasound compared with the computed tomography in evaluation of maxillary sinusitis.Patients and materials: This comparative cross-sectional study was done on 42 patients referred for computed tomography examination of paranasal sinuses in Al-Yarmook Teaching Hospital-Baghdad, from October 2012 to February 2013 with patients clinically suggesting an underlying maxillary sinusitis. Ultrasound and computed tomography examinations were carried out on the same day, the ultrasound being the first investigation. The sample of this study consisted of 26 men and 16 women. The age of patients ranged between 20-60 years, mean age equal to 38 years. Our patients were randomly selected.Results: The results are based on the data analysis of total forty two [84 sinuses] patients with symptoms and/or signs of maxillary sinus diseases. In this study, real time B-mode ultrasonography of maxillary compared with computed tomography had a 81.8% sensitivity, 100 % specificity and 90.4% accuracy. The present study showed that total opacity of the maxillary sinus on computed tomography frequently gave a positive full sinus scan [77.7%] while the rest shows partial sinus scan [22.3%]. All patients with positive full sinus scan on ultrasound of maxillary sinuses have total opacity on computed tomography.Conclusion: Ultrasound can help as one of primary investigations of maxillary sinusitis. A positive full sinus scan appeared specific for total opacity of the maxillary sinus on computed tomography. A postural adjustment of the patient slightly bent foreword reduces the false negative results.Key words: ultrasound, computed tomography, maxillary sinus.

خلفية البحث: فحص الأمواج فوق الصوتية للجيب الوجني يوفر معلومات هامة للطبيب السريري عن تشريح الجيب الوجني وأمراضه من خلال فحص سريع وغير اجتياحي.هدف البحث: تقييم فعالية فحص الامواج فوق الصوتية لأمراض الجيب الوجني بالمقارنة مع مشاهدات المفراس الحلزوني.الطرق والمرضى: دراسة وصفية مقارنة بين فحص الأمواج فوق الصوتية للجيب الوجني والمفراس الحلزوني، أجريت على 42 مريضا للفترة من تشرين الأول 2012 إلى شباط 2013 في مستشفى اليرموك التعليمي في بغداد. اجري فحص الأمواج فوق الصوتية والمفراس الحلزوني للجيب الوجني في نفس اليوم على ان يكون فحص الامواج فوق الصوتية في البداية. يشمل البحث 26 مريضا ذكرا و 16 مريضا انثى وان معدل عمر المرضى يتراوح ما بين 20-60 عاما علما ان اختيار المرضى كان عشوائيا. النتائج: أظهرت نتائج مقارنة مشاهدات فحص الامواج فوق الصوتية مع مشاهدات المفراس الحلزوني التالي: الحساسية 81.8% الخصوصية 100% الدقة 90.4%. كما بينت هذه الدراسة بأن العتمة الكلية للجيب الوجني في المفراس الحلزوني تظهر غالبا عتمة كاملة في فحص الامواج فوق الصوتية بنسبة 77.7 % بينما تظهر عتمة جزئية في 22.3% من الحالات، وان كل مريض اظهر عتمة كلية في فحص الأمواج فوق الصوتية دائما يعطي عتمة كلية في فحص المفراس الحلزوني. الاستنتاجات: فحص الأمواج فوق الصوتية للجيب الوجني ممكن اعتماده واحدا من الفحوصات الابتدائية للكشف عن أمراض الجيب الوجني. العتمة الكلية في فحص الامواج فوق الصوتية تظهر خصوصية عالية للعتمة الكلية للجيب الوجني في فحص المفراس الحلزوني. تغيير وضعية فحص المريض نحو الأمام قليلا يقلل من النتائج السلبية الكاذبة.مفتاح الكلمات: الامواج فوق الصوتية، المفراس الحلزوني، الجيب الوجني


Article
Abbas Khalaf ALI, Mohammed Al-Hilli & Abdullateef Aliasghar: THE ROLE OF COMPUTED TOMOGRAPHY IN THE EVALUATION OF GASTROINTESTINAL STROMAL TUMORS.

Authors: Abdullateef Aliasghar --- Mohammed Al-Hilli --- Abbas Khalaf ALI
Journal: Basrah Journal of Surgery مجلة البصرة الجراحية ISSN: 16833589 / ONLINE 2409501X Year: 2014 Volume: 20 Issue: 2 Pages: 95-101
Publisher: Basrah University جامعة البصرة

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Abstract

Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal neoplasms of the digestive tract and Computed tomography (CT) is an imaging modality of choice for the detection and evaluation of GISTs. This study aimed to describe the computed-tomographic imaging features of gastrointestinal stromal tumors in our clinical work and to evaluate and improve our CT protocols in the diagnosis of GIST. This is a cross-sectional study conducted in the period of October 2011–December 2012 in the Radiology Institute and the GIT Center of Medical City in Baghdad. Twenty cases of GIST were analyzed by multidetector abdominal CT including fifteen male and five female patients of age (20-70) years. Images were analyzed for tumor location, size, definition, diameter, shape and other features. The results showed that 13 (59%) of tumors were located in the stomach and five (23%) were located in the mesentery. GISTs were extraluminal in 13 (59%) patients. The tumor margins of 13 (59%) tumors were well defined, and irregular in eight (36%). Location of GISTs did not correlate with their definition, diameter or shape; while a significant correlation had been found with the hemorrhage and enhancement. In conclusion, CT scan is the most common imaging technique for the detection, localization and initial evaluation of GIST extension. The stomach was the commonest location of GIST occurrence among our patients. The CT features of GISTs were well-defined tumor margins, extraluminal site and fungating morphology.

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