Showing papers by "Aetna published in 1979"
TL;DR: The technical quality of radiographs in the sample is adequate for most criteria, and radiograph quality, number, and type of film submitted do not explain much of the variation in disagreements between the direct and indirect assessments of crown services.
Abstract: The purpose of the study was to assess the quality of radiographs accompanying claims submitted for pretreatment review, and to determine the relative importance of radiograph quality in dental consultants' decisions regarding the necessity and appropriateness of crown services. Findings indicate that: 1) the technical quality of radiographs in the sample is adequate for most criteria; and 2) radiograph quality, number, and type of film submitted do not explain much of the variation in disagreements between the direct and indirect assessments of crown services. The most important radiograph variables influencing pretreatment review decisions appear to be the number of periapical films submitted for review, and the density/contrast of the radiographs.
6 citations
Patent•
27 Mar 1979TL;DR: In this paper, a method and system for monitoring brake performance in part-revolution clutch presses and the like comprising an overrun cam coupled to a switch for indicating passage of the press die beyond the nominal desired stop position and entry into a danger range is presented.
Abstract: A method and system for monitoring brake performance in part-revolution clutch presses and the like comprising an overrun cam coupled to a switch for indicating passage of the press die beyond the nominal desired stop position and entry into a danger range indicative of impending brake failure. A control relay is coupled to the overrun cam switch for inhibiting press operation when impending brake failure is sensed. A time delay relay is coupled to a press operator responsive switch for inhibiting operation of the monitoring circuitry and permitting passage of the press die through the danger zone during normal press operation.
5 citations