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KMID : 0378219770070010027
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Dental Radiology
1977 Volume.7 No. 1 p.27 ~ p.30
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Abstract
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To insure accuracy in dental roentgenographs, it is important that the patient´s head position and angulation of the x-ray tube. In 1907 Ciexzynski applied the rule of isometry to dental radiography and established that in the production of an accurate image of tooth the central ray must be porjected perpendicularly to a plane bisecting angle formed by the lognitudinal axis of the tooth and the film plane. Proper exposure of the film is a part of the production of a good dental radiograph, and correct processing also makes an essential contribution to the quality of the radiograph.
The author analysed the failure of exposure and processing results, and recommended followings.
1. The patients head must be positioned that occlusal plane are parallel with the horizontla floor.
3. Central ray must be projected to the objective tooth and supporting structure and projected as perpendicularly to tooth axis and film surface as possible.
3. In processing, the temperature of the solution and the processing time must be correct.
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