Evaluation of drying period and quality of image of radiographs submitted to immersion in ethyl alcohol at different concentrations / Avaliação do tempo de secagem e da qualidade da imagem de radiografias submetidas a banho em alcool etilico em diferentes concentraçãoes

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

This study evaluated the action of ethyl alcohol at concentrations of 46ºGL, 70ºGL and 92ºGL as an accelerator of drying of dental radiographs, with a view to reduce the time required for processing. Also, it was observed whether this product might cause alterations in the density, sensitometric properties and quality of these radiographs after a 6- month storage period. For that purpose, intraoral radiographic films D-speed, E-speed and E/F (Insight) of Kodak were employed, which were divided into groups according to the utilization and concentration of the alcoholic substance. All films were developed manually by the time-temperature method in a portable dark room, to simulate the clinical conditions. The radiographs were submitted to densitometric and clinical analyses, besides construction of characteristic curves for achievement of contrast and sensitivity, at periods corresponding to one and six months after accomplishment of the study, simulating conditions of storage. It was observed that the utilization of ethyl alcohol accelerated the drying of radiographs, regardless of the type of film; the shortest time was achieved with utilization of the alcoholic substance of highest concentration. However, the density, contrast and speed of radiographs were altered when concentrations of 70ºGL and 92ºGL were used; being that the latter also altered the visual quality of images. Such alterations could be observed at the two evaluations and study periods. Thus, it was concluded that, even though the ethyl alcohol may accelerate the drying of radiographs, its utilization caused alterations able to impair the quality of image, even after a short period of storage

ASSUNTO(S)

filme para raios x processing processamento densitometria x-ray film densitometry

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