نتایج جستجو برای: periapical radiography parallel film holder
تعداد نتایج: 344406 فیلتر نتایج به سال:
The purpose of the study was to compare the segmental measurement tool from the Shick Technologies CDR digital system with the conventional film radiography measurement technique to determine preoperative working length. Natural extracted human teeth with varying degrees of root curvature were used. All teeth were imaged using the Shick Technologies CDR direct digital system and conventional E-...
Background: Radiation doses associated with the conventional dental radiographies are relatively low, but their number is high. Therefore, justification is necessary to ensure that radiation doses to patients, particularly children, are kept as low as reasonably achievable. Materials and Methods: The exposure factors applied for real patients in four age groups (5, 10, 15-year-old and adult) we...
OBJECTIVE To investigate the influence of radiographic film and tube positioning, the presence and the size of brackets on in vitro measurements of proximal enamel thickness of mandibular incisors on periapical radiographs aimed to aid planning of interproximal enamel reduction procedures in orthodontics. MATERIALS AND METHODS Eighty human mandibular incisors were assigned to sets of four and...
Periapical radiography is a routine radiographic procedure performed by dentists on daily basis. It can be taken with two techniques, the paralleling technique (P tech) and bisecting angle (B tech). This systematic review aimed to identify relevant literature, compare use of P B techs across various dental specialties, determine most appropriate used for different purposes in taking periapical ...
Introduction: Dental caries is dramatically common among people. The aim of this study was to evaluate the agreement of paper prints and film prints and monitor in detection of dentinal caries in digital panoramic radiography. Materials and methods: In this analytical study, radiographic images of 150 patients referred to a private clinic and who needed panoramic radiographs for various rea...
Digital radiography is earning its place in the NDT market, as specialists realize this technology surpasses Film and Film Replacement. Portable digital Radiography provides many benefits to users. Fast images upon request for immediate analysis mean there is no compromise on image quality and no repositioning. Vidisco flat panel systems enable the reduction of working time and costs while enla...
Background and purpose: Assessment of tooth length has an important role in success and failure of dental treatments. As yet periapical radiography has been used for the assessment of tooth length causing high x-ray exposure, long time and patient discomfort. Using panoramic radiography can resolve these problems. The major disadvantage of panoramic radiography is monotonous magnification. The ...
Although ultrasound, computed tomography, magnetic resonance imaging and nuclear medicine are digital, they have been displayed in analogue format in the form of films. Other modalities like digital radiography units and scanning of conventional films (computed radiography) are accepted technologies with resolution similar to the conventional film/screen. This advancement in technology is criti...
background: increasing the x-ray focus to film distance (ffd) has been advocated as an effective method to reduce the patients’ radiation dose. the aim of this study was to investigate the efficacy of this technique in patients' dose and image quality in pediatric chest x-ray.material and methods: sixty pediatric patients were x-ray imaged at ffds of 100 and 130 cm. dose measurements were ...
The selection and use of any method to be used for radiography depends on a number of considerations, these in general being: a) The size, shape, orientation and distribution of imperfection in the weld. b) The dimensions, geometry and physical properties of the weld and material. c) The radiographic sensitivity required by the Standard, Code or Specification. d) Cost of radiography. e) The loc...
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