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An evaluation of ektaspeed plus film versus ultraspeed film for endodontic working length determination
Ist Teil von
Journal of endodontics, 1998, Vol.24 (1), p.54-56
Ort / Verlag
United States: Elsevier Inc
Erscheinungsjahr
1998
Link zum Volltext
Quelle
MEDLINE
Beschreibungen/Notizen
Thirteen teeth in human cadaver sections were accessed and #15 K-files were placed at various lengths in one root canal of each tooth. Using a positioner to ensure duplicate views, radiographs were taken with both Ultraspeed and Ektaspeed Plus X-ray film. Each of the 26 radiographs was coded and then placed in random order. Six endodontic specialists measured the distance from the file tip to the radiographic apex on each film. The results were analyzed by analysis of variance and Cronbach's generalizability theory. It was found that 94% of the variance in measurements was due to differences among the viewers, whereas 5% was due to a combination of viewers and tooth. Only 1% was due to differences between the two types of film. It was concluded that Ektaspeed Plus film may be used for working length radiographs because it requires only ∼50% of the radiation needed for Ultraspeed film.