research centers


Search results: Found 43

Listing 1 - 10 of 43 << page
of 5
>>
Sort by

Article
Magnification in panoramic radiography

Author: Lamia H. AL-Nakib لمياء حامد النقيب
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2005 Volume: 17 Issue: 3 Pages: 45-47
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: It is known that the image of panoramic radiograph is larger than the structure it represents.Materials and methods: To quantify the magnification of the machine used in this study (Cranex 3+), horizontal curved wire of 150 mm. was fixed by wax on a dry skull between maxilla & mandible. Other 30 mm. long wires were fixed vertically, one in the midline & the others in the canine, premolar & molar regions bilaterally. The skull was positioned as the patient's head positioned so the area to be exposed is precisely within the zone of sharpness, the films were processed & the radiographs were viewed.Results: A comparison between real & radiographic wires length was done. The result revealed that horizontal magnification was 6.6-10%, while the vertical magnification was 26.6-30%, but the machine rotation was symmetrical.Conclusion: Carnex 3+ X-ray machine had a symmetrical rotation with 26.6-30% vertical magnification &6.6-10% horizontal magnification


Article
An evaluation of the Film–Based and Digital Panoramic Radiographic Quality

Author: Rand Shaker Al–Ani
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2008 Volume: 8 Issue: 15 Pages: 67-71
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Aims: To compare the image quality of panoramic radiographs obtained with charge–coupled device
(CCD) and screen–film systems. Materials and methods: True Panoramic radiographs were taken in
26 patients each with both screen–film and CCD systems. The images were obtained with TRATO
2000, CE by VILLA SISTEMI MEDICALIS–ITALY with regular intensifying screen type
Kodak Lanex and 6 x 12 inch screen type film used for film–based projection, while Dimax3
digital system pan/ceph, PLANMECA, Helsinki, Finland with CCD X–ray image sensor (the
size of the panoramic sensor was 15 x 30 cm and the resolution of the panoramic image was around
230 dpi, used for digital projection. Both X–ray machines were operated at range of 70–80
kV and 10–12 mA, according to the patient age. Altogether, the digital images files were
displayed on 17 inch monitor, brightness and contrast were fixed and no enhancement was
made before the digital images files were saved. While the film–based images after processing
were viewed on the viewer box. Image quality was assessed by rating the visibility
of five anatomical landmarks commonly found on panoramic radiographs: The superior and
inferior cortex of the mandibular canal, the superior and inferior margin of the mental
foramen, the lower and anterior border of the maxillary sinus, the lower border of the
mandible, and the articular eminence. For each image, the given landmark was rated as good
(image of excellent diagnostic quality), acceptable (image of diagnostic quality but should
be improved), or unacceptable (image not of diagnostic quality). Each image was then given
an overall evaluation rating of good, acceptable, or unacceptable. Results: The data collected
from the evaluation of the digital and film–based images by the three examiners, were analyzed
by t–test. The image quality, as represented by each of the five anatomical landmarks,
and the overall rating for each system were expressed as the mean scores of the three
examiners. The difference between the film–based and the digital images systems was not statistically
significant (P>0.05). Conclusions: It was concluded that digital panoramic radiographs are equivalent
to film–based images for the five anatomical landmarks.

Keywords

Digital --- film–based --- panoramic


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

Loading...
Loading...
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
Accuracy of digital and film panoramic radiograph for assessment the sites of periapical bone lesions (comparative study )

Author: Dr.Amal Raouf S. Mohammed, B.D.S.,H.D.D.,M.Sc. د. أمل رؤوف
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2011 Volume: 8 Issue: 1 Pages: 55-58
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

The dental pulp is a delicate connective tissue , it react to bacterial infection or toother stimuli by an inflammatory response .Once infection has been established in thepulp , spread of the process can be through the root canals and into the periapicallesions.The aim of this study was to evaluate the accuracy of digital and film panoramicradiographs in detection the periapical bone lesion in different sites ,which detectedpreviously by periapical radiographs .In this study 106 teeth were examined by intraoral periapical radiographs which indicated that only 60 teeth were with periapicalbone lesion , then by both digital and film panoramic the teeth with periapical lesionwere examined .The results show significant advantage of digital panoramic whichshow the same mean of periapical lesion like conventional periapical radiographs ,also the study show significant differences between digital and film panoramicradiographs in incisor region for the detection of periapical bone lesion .


Article
Inter Observer Agreement in Evaluat-ing the Position, Shape and Appear-ance of Mental Foramen by Panoramic Radiography

Author: Shahrazad Sami
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2010 Volume: 10 Issue: 20 Pages: 383-389
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Aims : the study aims is to examine the inter- observer variability in radiographic interpretation of the variable position , shape and appearance of mental foramen. Materials and Methods: Four examiners, two dental radiologists and two oral surgeons evaluated 30 panoramic radiographs to evaluated the position, shape and appearance of mental foramen. Results: The most frequent position of mental fo-ramen was between first and second premolars then followed by those below the apices of the first and second premolars and the most frequent shape of mental foramen was irregular where separated type is the frequent appearance of mental foramen. For agreement there was no significant difference between two radiologist for position ,shape and appearance of mental foramen , but with a significant difference was found between four observer, for the position of mental foramen. Conclusions: The study concluded that the position of mental foramen is most commonly below and between the pre-molar teeth and the most frequent shape are irregular and appearance separated type


Article
Radiographic findings of oral and dental aspects of chronic renal failure of Iraqi patients under hemodialysis therapy

Loading...
Loading...
Abstract

Background: Chronic renal failure can give rise to a wide spectrum of oral manifestations, affecting the hard or softtissues of the mouth. The majority of affected individuals have disease that does not complicate oral health care. Themain aim of this study is to assess the response to therapy and to determine the radiographic manifestations in teethand jaws of individuals with chronic renal failure undergoing hemodialysis and to find possible preventive andtherapeutic strategies.Materials and methods: Thirty male patients with chronic renal failure who were continuously receiving therapy withongoing hemodialysis were included in this study and were divided into two subgroups according to the period oftherapy (those who had renal dialysis for less than a year, and 1 to 2 years). All patients were requested forpanoramic (OPG) radiographs with standardized parameters according to user manual of the machine thenquantify the frequency of abnormal dental and periodontal radiographic findings in both arches i.e. the alveolarbone resorption, presence of hypercementosis of the roots, lamina dura reduction or loss and dental condition, thenthe data were analyzed statistically by comparison with control normal subjects.Results: It has been established that the duration with the increase the abnormality in dental and periodontalradiographic findings as alveolar bone resorption, presence of hypercementosis of the roots, lamina dura reductionor loss, as well as other dental diseases.Conclusion: Panoramic radiographic view used in this study considers as a good monitor for jaw and dental changesassociated with patients affected with chronic renal failure treated with hemodialysis, and the results showed strongcorrelation between duration of hemodialysis and all studied variables. Clinicians should use oral health assessmenttools to determine individual treatment and approaches to promote the oral health of patients undergoinghemodialysis and improve their quality of life


Article
New Approach in Estimation of Dental Development

Author: Hayder A. Kadhim
Journal: Medical Journal of Babylon مجلة بابل الطبية ISSN: 1812156X 23126760 Year: 2015 Volume: 12 Issue: 1 Pages: 317-322
Publisher: Babylon University جامعة بابل

Loading...
Loading...
Abstract

This study aimed to estimate the mature root length of first premolar by using the root of first molar as a reference through the panoramic radiograph.The sample of this study included 102 panoramic radiographs of Iraqi Arab subjects with an age ranged between 17-25 years. The root length of both the first premolars and first molars are measured on good diagnostic quality panoramic radiographs by using the Planmeca Romexis Viewer software. Pearson’s correlation coefficientwas used to determine the relation between the root length of first premolar and that of permanent first molar. Regression equation was used to determine the questions that predict the length of mature root of first premolars. Paired t-test was used to compare between the actual and predicted root length.The findings showed high correlation between the root length of first premolars and that of permanent first molars. Hence, the root length of permanent first molar can be used as predictors for root length of first premolars.


Article
Panoramic Radiography, Diagnosis and Abnormalities.

Author: Amera K Khalil
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2008 Volume: 8 Issue: 16 Pages: 205-212
Publisher: Mosul University جامعة الموصل

Loading...
Loading...
Abstract

Aim: To find the importance of panoramic radiograph as aid in iagnosis, prognosis and determination of treatment complexity.Materials and Methods: This study was conducted among (132) panoramic radiographs of males and females which were nearly equal in numbers.The mean age of males was (36.73) years and the mean age of the females was ( 29.82) years. Result: Among these radiographs (0.75%) showed edentulous upper and lower ridges, ( 0.75%) showed multiple dental implants, (1.51%) showed fixative appliance, ( 8.33%) showed fixed bridges, ( 9.84%) showed retained roots, (16.66%) showed endodonticallytreated teeth, (5.3%) showed radiopaque lesions. The dental caries experience of the total patients were (6.92) for D3MFT and (4.07) for D3FS. The majority of caries experience was found in permanent molars. The percentage of radiograph that showed microdontia and congenitalmissing teeth were (4.54%) and (10.6%) respectively, the number of males was higher than that of females and mostly related to third molars. The percentage of hyperdontia (0.75%), dilacerations (4.54%), concrescence (0.75%). The number of impacted teeth in femaleswas higher than that in males with statistically significant difference. Conclusion:The panoramic survey is necessary for all patients.


Article
Evaluation of dental health and thickness of mandibular inferior cortex among menopaused Iraqi cigarette smokers sample by the aid of using digitapanoramic radiography

Authors: Dr. Dujanah S. Al-Abboushi, B.D.S., M.Sc.** د. دجانة العبوسي --- Assist. Prof. Dr. Lamia H. Al-Nakib, B.D.S., M.Sc د. لمياء النقيب
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2010 Volume: 7 Issue: 2 Pages: 235-244
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

AbstractSmoking is linked to osteoporosis through its anti-estrogenic effect in womenwhich results in premature menopause in smokers and increased bone resorption iscorrelated with estrogen loss in menopause women. The aim of this study is toevaluate the effects of smoking and hormonal changes on the thickness of mandibularinferior cortex and the dentition status in both maxilla and mandible (DMFT) inmenopausal females and to estimate the value of panoramic radiographic findings inassessing the possibility of latent osteoporosis. Panoramic images for 80 healthy,median stature, smokers and non-smokers Iraqi female subjects aged (20-35) yearspremenopausal and (45-60) years menopause was done, then the thickness ofmandibular inferior cortex and (DMFT) was evaluated. The results showed thatpanoramic radiographic measurements are considered as indicator of bone turnoverand the dentist is able to identify smokers and non-smokers postmenopausal femaleswith increase risk of osteopenia and osteoporosis by using dental panoramicradiography which is a simple valuable screening tool.


Article
Computer measurement of image shift of intracoronal pins viewed on bite-wing and panoramic radiographs

Author: Anas F. M. Al-Aubaydi انس فلاح العبيدي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2005 Volume: 17 Issue: 3 Pages: 17-22
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Background: The image shift can be measured from a combination of bite-wing and panoramic radiographs, so the aim of this study was measuring the relative image shift of intracoronal pins viewed on bite-wing and panoramic radiographs by using computer.Material and methods: Sixteen pins were placed in the dentin of three molars and one premolar on the left side of a dried mandible. Panoramic and bitewing radiographs were obtained.Results: Measurements of the image of pins on the radiographs were obtained by using special computer software and these measurements were compared with measurements on the mandible.Conclusion: The bite-wing radiograph shows little distortion of the relative distances between pins. In panoramic radiograph magnification and parallax shift of the pin images were obtained. The horizontal magnification of interpin images between pins placed mesially and distally was greatest at the third and least at the first molar. For diagonally related pins in a tooth the images showed magnification and parallax shift so that the relative distance between pins placed mesiobuccally and distolingually increased from premolar to third molar, where as distobuccally and mesiolingually placed pins showed reverse trend.

Listing 1 - 10 of 43 << page
of 5
>>
Sort by
Narrow your search

Resource type

article (43)


Language

English (39)

Arabic and English (1)


Year
From To Submit

2017 (6)

2016 (8)

2015 (3)

2014 (1)

2013 (2)

More...