What's the angle: a study of the angle bisected in intraoral radiography.
Intraoral radiographs were made via the bisecting-the-angle technique on patients of different ages, sexes, and races. The tooth-film angles for various areas of the mouth were measured and found to be close to 30 degrees for all areas of the mouth except the mandibular posterior regions. The study was conducted to assist in quick positioning of the x-ray beam in difficult cases.
D000293:Adolescent; D000328:Adult; D002648:Child; D003748:Dental Equipment; D005260:Female; D006801:Humans; D008297:Male; D011856:Radiographic Image Enhancement; D011861:Radiography, Dental / Q000295:instrumentation / Q000379:methods*; D013679:Technology, Radiologic; D014070:Tooth / Q000000981:diagnostic imaging