It has been widely recommended that rectangular collimation devices be used to reduce the amount of scatter radiation during dental periapical and intraoral radiographs. The NCRP report No. 145 states the following: Rectangular collimation of the beam shall be used routinely for periapical and bitewing radiography and occlusal radiography for children. Receptor-holding devices shall be used whenever possible. By 2025, the California Dental Association will require the use of rectangular collimation for intraoral dental x-ray equipment. The following article describes the newest requirements for California, only time will tell if others states follow their example.

New X-Ray Requirements

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