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Simplified and standardized intraoral radiography with reduced tissue irradiation.

Because the conventional circular beam used in dental radiography irradiates more tissue per exposure than necessary, instruments and techniques for use with a rectangular beam have been developed. Use of the rectangular beam, which is s lightly larger than the X-ray film, can reduce the amount of tissue being irradiated by up to 58%. Positioning instruments ensure positive alignment of the X-ray beam and the film. Radiographs made with the technique have greater clarity, improved contrast, and better tissue differentiation than those taken with the circular beam.