پوسیدگی دندان Dental Caries

پوسیدگی دندان Dental Caries

اسلاید 1: Dental Caries پوسیدگی دندان

اسلاید 2:

اسلاید 3: IntroductionThe most commonly used radiographic method for detectingcaries is the bitewing technique. The purposeis to detect lesions that are clinically‘hidden’, estimate the depth of this lesion&bitewingradiographs should always be examined for occlusal caries indentin. This examination will not determine whether a cavity is present.

اسلاید 4: Technical and quality aspectsHow is the radiograph taken?The central beam of X-rays pass at rightangles to the long axis of the tooth, and tangentially throughthe contact. In the fully dentate patient the central beam should be directed at the contact between the second premolar and first molar. teenage populations with low caries prevalence, one radiographon each side is sufficient, while in adults two films oneach side are recommended.

اسلاید 5: Bitewing with film and with digital receptorsDigital radiography is now increasingly used.advantages of digital radiography :• The facilities for density and contrast can optimize the quality and reduce retakes.• The radiation dose is lower.• No wet chemicals are involved in processing.• The technique is less.

اسلاید 6: disadvantages:thickness of the sensor and the cable make the system bulky resulting in positioning problems, particularly in children.