نتایج جستجو برای: panoramic x

تعداد نتایج: 626942  

Journal: :journal of dental school, shahid beheshti university of medical sciences 0
m hajipour y safi dept. of oral & maxillofacial radioligy, dental school, shahid beheshti university of medical sciences, tehran, iran. m kadkhodazadeh dept. of periodontics, dental school, shahid beheshti university of medical sciences, tehran, iran. m mirakhori students research committee, dental school, shahid beheshti university of medical sciences, tehran, iran r amid dept. of periodontics, dental school, shahid beheshti university of medical sciences, tehran, iran. a dehghan dept. of romatology, medical school, shahid sadoughi university of medical sciences, yazd, iran.

objective: osteoporosis is the most common metabolic disease of the bone decreasing bone mineral density (bmd) particularly in postmenopausal women. on the other hand, panoramic radiography has several applications in dentistry. it appears that by calculating some indices on panoramic radiographs, we may be able to predict the risk of osteoporosis in high-risk individuals. the present study was...

2017
Evelyn Louise Antonio Aguinaldo José do Nascimento Antonio Adilson Soares de Lima Maria Suely Soares Leonart Ângela Fernandes

OBJECTIVE To assess the genotoxicity and cytotoxicity produced by X-rays in the epithelium of the oral mucosa of infants exposed to panoramic radiography. METHODS The sample consisted of 30 healthy children, 19 females and 11 males, ranging in age from 4 to 10 years (average of 7 years of age). Oral mucosa cells were collected by liquid-based cytology immediately before and after seven days f...

Journal: :Medicina oral, patologia oral y cirugia bucal 2008
Cristina Madrigal Ricardo Ortega Cristina Meniz Juan López-Quiles

OBJECTIVES To analyze the availability of bone in the interforaminal region and to demonstrate the variation in diagnosis between panoramic x-ray and cone-beam computed tomography (CBCT). MATERIAL AND METHODS In 50 patients and in 5 areas of each, a series of parameters concerning available bone were measured on both the panoramic and the CT images. RESULTS Panoramic images underestimate th...

2017
Shambulingappa Pallagatti Priyanka Parnami Soheyl Sheikh Deepak Gupta

OBJECTIVE It is a well-known fact that osteoporosis affects the people with old age and remains unnoticeable until the patient presents with fracture. Various studies in the literature reveal that panoramic radiographs may prove to be beneficial in the detection of Osteoporosis in patients. Henceforth this present study was aimed to validate the use of Klemetti Index (KI) on panoramic radiograp...

Journal: :Acta medica Iranica 2012
Mohammad Taghi Bahreyni Toossi Fateme Akbari Shahram Bayani Roodi

Nowadays, radiography is a necessary procedure in diagnosis and treatment of patients with dental problems. According to the ALARA (as low as reasonably achievable) principle, dentists must take radiographs of sufficient quality at the lowest possible radiation dose to the patients. The assessment of patient dose on panoramic radiography is difficult because of dynamic nature of the imaging pro...

ژورنال: مجله دندانپزشکی 2017

Background and Aims: In the field of orthodontics, gaining comprehensive information around dento-skeletal complex is necessary to choose the best treatment plan for each patient. The aim of this study was to investigate the linear and angular parameters in panoramic radiographs to find a path to correlate transvers to sagittal dimensions. Materials and Methods: Total number of sixty two, ...

Journal: :Dento maxillo facial radiology 2010
K Ogawa R P Langlais W D McDavid M Noujeim K Seki T Okano T Yamakawa T Sue

The objective of this study was to develop a new practical method to reconstruct a high-quality panoramic image in which radiographers would be free from the onerous task of correctly locating the patient's jaws within the image layer of the panoramic unit. In addition, dentists would be able to freely select any panoramic plane to be reconstructed after the acquisition of the raw scan data. A ...

2007
Robert Y.L. Chu Tin Lam Yongguang Liang

The location and field size of the incident X-ray beam in panoramic dental radiography cannot be ascertained visually most of the time. However, these parameters are needed for quality control and dosimetry determination. To alleviate this problem, we tested GafChromic XR-QA film on two panoramic systems. For each system, we used the length of a cross-sectional image of the incident beam and th...

Journal: :journal of dentistry, tehran university of medical sciences 0
l. khojastehpour associate professor, department of oral and maxillofacial radiology, school of dentistry, shiraz uni sh. shahidi associate professor, department of oral and maxillofacial radiology, school of dentistry, shiraz uni s. barghan oral radiologist, private practice el. aflaki professor, department of romatology, school of medicine, shiraz university of medical sciences, shir

objective: in this study, the usefulness of panoramic mandibular index (pmi) on panoramic radiographs in diagnosis of osteoporosis was evaluated and its correlation with bone mineral density (bmd) of the neck of femur and spine was determined. materials and methods: in this cross-sectional study, 140 patients (all females) were categorized as either normal, osteopenic or osteoporotic according ...

Journal: :Dento maxillo facial radiology 2013
L Vazquez Y Nizamaldin C Combescure R Nedir M Bischof D M Dohan Ehrenfest J-P Carrel U C Belser

OBJECTIVES Conventional panoramic radiography, a widely used radiographic examination tool in implant treatment planning, allows evaluation of the available bone height before inserting posterior mandibular implants. Image distortion and vertical magnification due to projection geometry is well described for rotational panoramic radiographs. To assess the accuracy of vertical height measurement...

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