RESUMO
Panoramic radiographs used alone were ineffective diagnostic aids in the detection of early interproximal carious lesions, particularly enamel lesions. The best radiographic survey in terms of numbers of enamel interproximal carious lesions detected was the combination of periapical plus posterior bitewing radiographs. For interproximal lesions extending through the enamel and into the dentin, all combinations except panoramic radiographs used alone showed comparable usefulness. For lesions involving the enamel and dentin, and extending half way or more from the dentinoenamel junction to the pulp, there generally were no significant differences between any of the combinations.
Assuntos
Cárie Dentária/diagnóstico por imagem , Radiografia Panorâmica , Adolescente , Adulto , Idoso , Humanos , Pessoa de Meia-Idade , Radiografia Panorâmica/instrumentaçãoRESUMO
Four lateral cephalometric radiographs of a skull phantom, each made with a different screen/film combination, were compared for usefulness in making orthodontic measurements of the skull and jaws. The four screen/film combinations ranged in speed from 1 to 4. One combination was used with a grid. One of the screens incorporated "rare earth" phosphors. Seven orthodontists separately viewed the radiographs, identified eight selected landmarks, and determined the adequacy of their radiographic images. They also evaluated each radiograph taken as a whole. The results showed that, either for landmark visualization or for over-all value, there was little difference in ratings. All were found to be adequate. It was concluded that cephalometric radiographs made with the faster screen/film combinations, including those incorporating rare earth screens, were both usable and useful for orthodontic measurements of the skull.
Assuntos
Cefalometria/métodos , Intensificação de Imagem Radiográfica , Radiografia Dentária/métodos , Ecrans Intensificadores para Raios X , Intensificação de Imagem Radiográfica/instrumentação , Filme para Raios XRESUMO
Six panoramic radiographs, each made with a different screen/film combination, were compared for "periapical visibility" by fourteen dentists. Two combinations (a par-speed and a high-speed) used calcium tungstate screens, and three used rare earth screen systems four times faster than par-speed. One other combination consisted of a single rare earth screen plus a single-coated detail film. The radiographs produced by the faster rare earth screen/film combinations were found to be similar in quality to those produced by calcium tungstate screens. Rare earth screens could be used for panoramic radiography while maintaining quality and reducing exposure.