[ comparative evaluation of the stability of four processing solutions [Champion, Cronex, Teifsaz, Novin] in processing of intraoral films after time intervals]

ABSTRACT

In order to obtain good radiographs having optimum processing solution is important. Generallyafter a period of time the solutions will be oxidized and loose their efficacy. The goal of present research iscomparison of the quality stability of four processing solutions available in market "Champion, Teifsaz, Cronex andNovin".One hundred and twenty eight intraoral radiographic films of one type withspecific speed were exposed under identical exposure factors. A metal step wedge was used for the image.Each 4 days two periapical films were exposed and processed this was continued for two months. Finallyoptical density of radiographs processed in each solution were measured and compared according to the dayof investigation.All of the four solutions created acceptable density on the radiographs on the first day but there was adecrease in optical density after a period of time. Generally the Champion solution made the best density andafter that were Cronex, Teifsaz and Novin. There was a decrease in the quality ofTeifsaz, Cronex, Champion andNovin in order.As the composition and percentage of these four solutions are different, the stability of them arealso different. Champion was found to have the best quality among three other processing solutions