Journal of Dental Medicine

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Normal 0 false false false EN-US X-NONE AR-SA Osteoporosis is one of the most important complications in the elderly. In Osteoporotic bone, The composition is normal but density is changed. In fact, in a specified volume the bone tissue is decreased. Likewise, radiogeraphic density of bone image would be increased. In this study, densitometry was used to evaluate the prevalence of osteoporosis in 250 cases.

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Normal 0 false false false EN-US X-NONE AR-SA Thalassemia is a chronic inherited anemia caused by abnormal hemoglobin synthesis in which some changes in bones, maxilla and zygomatic bone are developed.  Radiologic view of cranial bones shows marrow space widening , cortical thinning , "Hair on End" view in cranium and  "Honey comb" view in jaws. In present report, radiologic features of a typical thalassemic patient are mentioned and discussed.

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According to the direct confrontation of dentist to oral complications of patients receiving radiotherapy, this study was conducted in Cancer institute of Imam Khomeini hospital in 1376-1377. Through this study, 70 patients expecting more than 4500 CGY radiation in salivary gland area was examined for xerostomia signs and symptoms . Artificial saliva and placebo were prescribed for patients to assess the results on xerostomia. The obtained results showed VA-oralube is significantly more effective in decreasing radiation complications (mucositis, dorsal tongue surface atrophy, pain and burning sensation of mucosa, dysphagia, oral ulcers, mucosal necrosis and gingivitis) than placebo or water. Due to the other advantages of artificial saliva such as fluride content and minor side effects, it should be prescribed in patients suffering from xerostomia as it can increase their life expectancy by reducing pain and discomfort.

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Background and Aim: Image distortion is one of the major problems in panoramic radiography. Horizontal and vertical correction factors could be determined for more efficient clinical applications. The purpose of this study was to determine horizontal and vertical correction factors in panoramic radiography.

Materials and Methods: In this test evaluation study in which an asymetric mandibular phantom was constructed by plexiglass and aluminium as soft and hard tissue equivalents. The right half was slightly shorter than the left half. Steel markers were installed to make vertical and horizontal measurments possible.The length of the markers as well as the intermarker distances were measured by Mitutoyo digital micrometer which was accurate within ±0.05mm. The phantom was then positioned in PM 2002 cc proline (Planmeca, Finland) panoramic machine and panoramic images were obtained. 8 times for each half of the phan. The same length and inter marker distances were measured on digitized panoramic images by Cygnus software, which was accurate whitin ±0.01 mm. Magnification and correction factors were determined for the vertical and horizontal dimensions in each region of pantomograms.

Results: The mean vertical correction factor was 0.77±0.02 (range: 0.75-0.80) in the right and 0.77±0.05 (range: 0.75-0.85) in the left half jaw. The mean horizontal correction factor was calculated as 0.98±0.15 (range: 0.76-1.18) in the right and 1.02±0.14 (range: 0.90-1.25) in the left half jaw.

Conclusion: Dissimilarity of vertical and horizontal correction factors among left and right half jaws and also in different regions of a half jaw is relatively considerable. However, a constant correction factor, specialy in horizontal aspect, could not be applicable. Comparing with horizontal correction factors the vertical correction factors showed less variations between different regions as well as different samples.