نتایج جستجو برای: dental x

تعداد نتایج: 771194  

Background: Fear of dental care prevents dental cleaning behavior and increases the prevalence of dental caries. This study was conducted to determine the effect of Trans-Theoretical Model constructs and fear of dental care on the dental cleaning behavior of students. <span style="font-family...

Journal: :The Journal of the American Dental Association 2019

2012
SULTAN A. MEO M. Phil

The dental professionals including dental X-ray technicians compass a variety of occupational risks including X-ray radiation. Therefore, the aim of the present study was to determine the effects of X-ray radiations on the phagocytic activity of Polymorphonuclear neutrophils (PMNs) in dental X-ray

Journal: :journal of dentomaxillofacil radiology, pathology and surgery 0
aliehsadat javad zadeh dept of maxillofacial radiology, school of dentistry, guilan university of medical sciences,rasht, iran. zahra dalili dept of oral &amp; maxillofacial radiology, school of dentistry, guilan university of medical sciences,rasht, iran. seyedeh tahereh mohtavipoor dept of maxillofacial radiology, school of dentistry, guilan university of medical sciences,rasht, iran. somayeh nemati dept of maxillofacial radiology, school of dentistry, guilan university of medical sciences,rasht, iran. iman saeidipouya orthodontics, school of dentistry, mashhad university of medical sciences, mashhad, iran. fatemeh shahsavari department of oral &amp; maxillofacial pathology, dental branch, islamic azad university, tehran, iran zahra pourhabibi

introduction: the image quality as well as film speed is influenced by the film processing conditions. different combinations of films and processing methods affect the diagnostic accu-racy. temperature and developer exhaustion result in different image quality. the purpose of this study was to evaluate the influence of film type and processing conditions on caries detec-tion.  material and met...

Journal: :iranian journal of radiation research 0
v. changizi department of radiology technology, school of allied medical sciences, tehran university of medical sciences, tehran, iran e. jazayeri department of radiology technology, school of allied medical sciences, tehran university of medical sciences, tehran, iran a. talaeepour department of oral radiology, school of dentistry, tehran university of medical sciences, tehran, iran

abstract background: the radiographic image accuracy depends on the x-ray film information visibility. good visibility is found by good contrast. radiation exposure parameters (kvp, mas) and film processing conditions have impact on contrast. in dentistry radiography machines, exposure time and processing procedure are set by radiographer. no optimized exposure time and processing conditions ma...

Journal: :International Journal of Orthodontia and Oral Surgery (1919) 1921

Journal: :iranian endodontic journal 0
mohammad mahdi aghdasi associate professor of radiology, dental school, shahid beheshti university of medical science mohammad asnaashari 2. associate professor of endodontics, dental school, shahid beheshti university of medical science, tehran, iran alireza aliari 3. dental student, dental research center, shahid beheshti university of medical sciences, tehran, iran farahnaz fahimipour 3. dental student, dental research center, shahid beheshti university of medical sciences, tehran, iran sepideh soheilifar 3. dental student, dental research center, shahid beheshti university of medical sciences, tehran, iran

introduction: inappropriate condensation of gutta-percha or improper use of sealer can lead to voids in root canal filling material and consequent failure of the treatment. timely detection of voids within root canal filling may prevent complications. in this study, we compared the accuracy of digital and conventional radiograph for detecting voids within root canal fillings . materials & metho...

2013
Abdolvahab Ehsani Rad Mohd Shafry Mohd Rahim Alireza Norouzi

The process of analysis of such images is important in order to improve quantify medical imaging systems. It is significant to analysis the dental x-ray images we need features of image. In this paper we present a method for segmentation and feature extraction of dental x-ray images. The proposed method has been implemented by using level-set method for segmentation after image enhancement and ...

Journal: :journal of craniomaxillofacial research 0
alireza parhiz department of oral and maxillofacial surgery, dental school, and craniomaxillofacial research center, shariati hospital, tehran university of medical sciences, tehran, iran

klinefelter syndrome includes a group of chromosomal disorders with at least one  additional  x  chromosome  in  male  karyotype  (46,xy).  up  to  now, different dental manifestations such as taurodontism, congenital absence of permanent teeth, shovel incisors, occlusal anomalies and increased permanent tooth size have been reported. a case of klinefelter syndrome with very rare dental feature...

Journal: :SADJ : journal of the South African Dental Association = tydskrif van die Suid-Afrikaanse Tandheelkundige Vereniging 2010
A R Le Roux N Lachman

INTRODUCTION Flexure of a dental composite can be detrimental to the success of a restoration. Flexibility considerations are thus important when comparing dental materials to optimize the success of resin restorations. AIMS AND OBJECTIVES Flexibility of 5.6 x 18.0 x 2.0 mm3 experimental alumina/feldspar and SR ADORO dental composites specimens were compared. It was hypothesized that alumina/...

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