title: Radiopacity of root canal sealers.
abstract: A standardized and reproducible method of radiopacity measurements of dental materials is presented. The method entails densitometric comparison of standard-sized specimens with an aluminum step wedge under controlled conditions for exposure and film processing. Methodologic aspects have been evaluated and discussed. Measurements of forty root canal sealers demonstrated wide variations among the different types. Visual examination could not provide reproducible measurements of the radiopacity of the materials.
mesh_terms: D015502:Absorptiometry, Photon / Q000295:instrumentation; D003287:Contrast Media; D011861:Radiography, Dental / Q000295:instrumentation / Q000379:methods; D012387:Root Canal Filling Materials
chemical_list: D003287:Contrast Media; D012387:Root Canal Filling Materials