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Article
Reverse Intra-oral Periapical Radiography For Mandibular Posterior Teeth

Author: Nazar Gh Jameel
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2010 Volume: 10 Issue: 19 Pages: 143-150
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To satisfy the newly reverse modified intra-oral periapical projection, in order to reduce the pa-tient discomfort and eliminate gagging reflex during periapical radiography of the lower posterior teeth. Materials and methods: Twenty voluntaries patients have been used in this research aged between 20-25 years, each patient subjected for two intra-oral periapical radiographic examinations for lower posterior teeth (premolars and molars). The first radiographic exami-nation has been made with ordinary principles of intra-oral periapical radiographic projec-tion, while the second radiograph has been made with reverse modified principles of intra-oral periapical radiographic projection. Five independent examiners (two oral radiographer, oral surgeon, oral diagnosis and oral medicine), rated the two radiographic images obtained from both radiographic examination methods. Image quality was assessed by rating the visi-bility of five anatomical landmarks: tooth structures identification (enamel, dentin and root can-al system), bone trabiculation, mental foramen borders, inferior dental canal borders and lamina du-ra. Results: The data collected from the evaluation of the radiographic images obtained from both radiographic projections were analyzed by paired samples chi-square test, which shown no significant difference (P>0.05) in image quality obtained from both techniques for five selected structures. The bone trabeculae and the lamina dura given higher rating of total score with ordinary technique (54, 49 points respectively) when compared with reverse radi-ographic technique (47, 41 points respectively). The highest percentage of unrecognized shadow of mental foramen and the inferior dental canal with use of ordinary radiographic technique (40%, 30% respectively), while the other examined anatomic structures (tooth structure, bone trabeculae and lamina dura) can be identified clearly with both radiographic techniques. Higher percentage of gag reflex and pain discomfort was observed with ordinary technique projection (45%, 40% respectively) in comparison with reverse technique projec-tion (0%, 5% respectively). Conclusion: the reverse intra-oral periapical radiographic technique can be used accurately in the radiographic projection of the mandibular posterior teeth; with minimal pain discomforted and with eliminated gagging reflex initiation.

Keywords


Article
Location of the mandibular foramen-Radiographic study

Author: Nazar GH JAMEEL
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2002 Volume: 2 Issue: 4 Pages: 214-219
Publisher: Mosul University جامعة الموصل

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Abstract

A comparison between the location of mandibular foramen on ten dry mandibles has been used in this study with its location on the two extraoral radiographic projections taken for each dry mandible. First projection with the use of panoramic radiograph and the second projection have been taken by lateral oblique jaw projection. The results are shown no significant difference between the measurements are taken from both radiographs. But still the lateral oblique jaw radiograph is more resoluted and accurate in the localization of the mandibular foramen.


Article
Radiographic evaluation of mental foramen on the panoramic radiography

Author: Nazar GH JAMEEL
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2002 Volume: 2 Issue: SpIss Pages: 349-359
Publisher: Mosul University جامعة الموصل

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Abstract

The appearance and the location of the mental foramen have been evaluated on the panoramic radiograph of(83) adult patients with complete dentition. The most frequent appearance was a separated type of mental foramen(50.61%) followed by continuous(24.09%), diffuse(19.28%) and unidentified type(6.02%). The most common location of mental foramen in relation to the lower bicuspid teeth was below the apex of second premolar(53.85%), and it lied lower than the midway between the upper and lower border of the body of the mandible, and some what it lied at one third of distance from the mandibular symphysis to the posterior border of the ramus of the mandible.


Article
Radiological accuracy in the interpretation of apical fitness in endodontics

Authors: Nazar Gh Jameel --- Nawfal A Zakaria
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2006 Volume: 6 Issue: 12 Pages: 151-154
Publisher: Mosul University جامعة الموصل

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Abstract

Aim: To compare the accuracy of right–angle paralleling and bisecting–angle radiographictechniques in the determination of apical fitness in endodontic therapy. Materials and Methods:Thirty three root canals of first upper and lower molar teeth have been used in this study. A K–filewas inserted into the canal until its tip was fit snuggly one millimeter shorter than the apex. Eachtooth then radiographed twice by the right–angle paralleling and bisecting–angle techniques. Thedistance between the file tip and the center of radiographical apex was directly measured by twoexaminers and the mean of each two measurements was recorded. Data were collected and analyzedstatistically by analysis of variance and Duncan’s Multiple Range test. Results: The mean valuerevealed that there were clear differences between the mean of measurements by the paralleltechnique (0.87mm) and that with the bisecting technique (0.39mm), when these two resultscompared with the mean of real measurements (1mm). One way analysis of variance revealed therewere significant differences in one of the three groups at p < 0.05 level. Duncan’ Multiple Range testshowed that the parallel measurements when compared with the real measurements the results showed that there was no significant difference but was significantly different from the bisecting measurements. Conclusion: It is preferable to the dentist to use the right–angle paralleling technique during root canal treatment, where it gives more accurate result for estimation of the working length.

Keywords

Parallel --- bisecting --- apical fitness


Article
The prevalence of root resorption in radiographically examined teeth

Authors: Nazar GH JAMEEL --- Zaydoon M KASIM
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2001 Volume: 1 Issue: 2 Pages: 148-152
Publisher: Mosul University جامعة الموصل

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Abstract

The aim of this study is to determine the prevalence of root resorption in radiographically examined teeth, (256) patients admitted for routine intraoral examination were included in the study. (16%) of the patients show root resorption in one or more teeth, and (5.64%) of all the examined teeth show evidence of external root resorption. The periapicalinflammation was the main cause of external root resorption, Two cases of internal root resorption were found in this study.

Keywords

External --- internal --- root resorption


Article
Temporomandibular Joint Assessment of Pre and Post Prosthetic Treatment of Par-tially Edentulous Patient (Radiographic Examination)

Authors: Marwah M Shehab --- Nazar Gh Jameel --- Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: 21 Pages: 12-23
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: This study investigates the condyle position in temporal fossa of completely and partially den-tated patients pre and post prosthetic treatment, and compares between right and left condyles in both groups by radiographic Examination. Materials and Methods: Twenty two completely dentate pa-tients (20-28) years old, and thirty partially dentate patients (35-65) years old meet the criteria of the study. For each patient a temporary removable acrylic partial denture was constructed. By using plan-meca digital radiography device (Finland), the radiograph for TMJ were taken by special panoramic technique in open and close mouth position for both groups (Pre, at, and Post insertion of dental pros-thesis). By using Dimaxis software program the linear measurements of the narrowest anterior and posterior joint spaces made by using program tools, the articular eminence inclination angle in closed mouth position also measured, and statistical analysis by using SPSS program version 11.5 for all data. Results: The results showed that in completely dentated patient, 76.5% had condyles in concentric po-sition, patients who had lost posterior teeth support showed a predominance of posterior condylar posi-tions and significant decreased in displacement after prosthodontic treatment (P=0.015 for right side and P=0.032 for left side) at significant level 0.05. Asymmetry in concentric position of condyle be-tween right and left side, but insignificant value P>0.05. There is significant difference in the inclina-tion of articular eminence angle between completely and partially dentate patients P=0.01 for the right side and P=.005for the left side. Conclusions: Posterior displacement of the condyle associated with loss of posterior teeth. Significant change in the condylar position occurred after prosthetic rehabilita-tion, patient's comfort obtained when the position of condyle in glenoid fossa is (concentric position + 0.35mm). The loss of teeth caused remodeling of articular eminence inclination.

Keywords


Article
The Effect of Laser Welding on the Ten-sile Strength and Radiographic Analysis of Co-Cr Repaired Joints

Authors: Abdullah J Mohammed --- Nazar Gh Jameel --- Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2012 Volume: 12 Issue: 23 Pages: 1-13
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To evaluate the effect of laser welding and arc welding on the ultimate tensile strength, radio-graphic appearance of the joints, and microscopic porosities in the fractographs. Four joining methods have been used, laser welding, and arc welding using three types of electrodes (iron, stainless steel, and brass). Effect of surface roughness on the aforementioned properties was evaluated. Materials and Methods: Three specimens as-cast control group, seventy two specimens were treated by polishing, laser, and sandblasting, and joined with the four joining methods. Joints examined by radiograph and porosities were measured by Dimax software program, their ultimate tensile strength, and strain was tested, and the microscopic porosities in the fractographs were measured using AutoCAD software program. Three cobalt chromium bars from the third group were joined to three stainless steel bars from the fourth group of the same diameter to test the ultimate tensile strength, and strain of the dissi-milar alloys. Results: Laser welded and brass soldered joints had significantly lower ultimate tensile strength and strain when compared to the control group, while the iron, and stainless steel soldered joints had insignificant differences in the ultimate tensile strength and strain when compared to the control group. Results shown that the iron and stainless steel soldered samples fractured in the heat affected zone while the brass soldered and laser welded samples fractured in the weld zone. The iron and stainless steel soldered joints had superior mechanical properties when compared with the control group. Laser welding of dissimilar alloys had the lowest mechanical properties among all techniques. Conclusions: revealed that laser welding was the most precise technique used in the current study. Weld fractures shown less tensile strength average and more brittle behavior. Radiographic properties had no influence on the mechanical properties of the joints.


Article
Biocompatibility of Soldering Materials Used for Repair of Cobalt Chromium Joints

Authors: Nadira A Hatim --- Nazar Gh Jameel --- Abdullah J Mohammed
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 25 Pages: 7-13
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The aim of this study is to evaluate the biological activities of three soldering materials used for joining Co-Cr joints (iron, stainless steel, and brass) on the tissue of the Rabbit. Materials and Meth-ods: Nine specimens of each iron, stainless steel, and brass where made as cylinders (3mm x 2.5mm). The middle part was made of the brazing materials and the upper and lower parts were made of Co-Cr. These specimens where implanted in the subcutaneous tissue of the rabbit, after two weeks the animals where sacrificed and biopsies where made and examined under microscope by three oral pathologists. Results: Stainless steel implants were the most biocompatible material among the three materials used as brazing materials. Stainless steel sites had insignificant differences with the control sites. Significant difference was found between the iron implanted sites and the control group. This result found by two viewers (A, and M), while the third viewer (Z) found no significant difference between the control group, and the iron implanted sites. Significant difference was found between the brass implanted sites and the control group, this result was found by the three viewers (A, M, and Z). Conclusions: The stainless steel had the most favorable tissue response among the three soldering materials, iron is in the second rank, and brass showed unfavorable tissue response due to release of Cu.


Article
Calibration Factor for Conventional Linear Cephalometric Measurements

Authors: Ruba J. Mohammed --- Nazar Gh. Jameel --- Mohammad N Al-Mallah
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2018 Volume: 18 Issue: 34 Pages: 31-41
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: the aim of this study is to determine a calibration factor to eliminate the distortion in the linear cephalometric measurements. Materials and Methods; the study was performed on the 5 dry skulls, the first skull contained 12 radiopaque markers fixed at different plains, and radiographed by digital cephalometric x-ray machine. The X and Y axes of the shadow of each radiopaque marker used to estimate the calibration factor. Eight linear distances measured directly and radiographically on the conventional cephalographs of the 5 skulls to evaluate the detected calibration factor. Results; the results showed no-significant difference (p > 0.05) between the direct and calibrated radiographic measurement on the digital and conventional cephalographs. whereas significant difference was found between the conventional cephalometric linear measurements as compared with direct anatomical linear and the conventional cephalometric linear measurements with those measurements manipulated with the estimated calibration factor (p < 0.05). Conclusions; this study found that the conventional cephalometric linear measurements could be reliable as that of digital cephalometric linear measurements, if it's calibrated by the calibration factor (1.08) which is estimated by the present study.


Article
Assessment of rabbit mandibular bone response to different amalgam implants radiographically

Authors: Nazar Gh Jameel --- Mohammad S Suleiman --- Ragheed M Basheer
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2004 Volume: 4 Issue: 7 Pages: 20-27
Publisher: Mosul University جامعة الموصل

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Abstract

The radiograghical interpretations can give an excellent indication about the biological response of hard tissue like bone to different foreign materials imp-lanted within it. This clinical study was carried out to evaluate radiographically the bone reaction of four different types of Iraqi manufactured amalgam alloys (in addition to Degussa alloys as a positive control) implanted within holes prepared in the mandibular bone of the rabbit, and additional negative control group in which the hole remained empty without any implanted materials was also included. The evaluation was done by careful verification of the presence or absence of the radiolucency at the periphery of the implanted amalgam at three different time intervals, the response varied from radio-lucency to radioopacity depending on the reaction of bone to different implanted amalgam alloys. Accordingly, the biocompatibility of the amalgam alloy was deter-mined depending on the radiographic pic-ture of bone response at the margin of the implanted alloys. The results showed no significant difference in bone response among the different types of alloy used.

Keywords

Amalgam --- bone --- implant --- biocompatibility

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