Jr. Tamburus et Mas. Lavrador, RADIOGRAPHIC CONTRAST - A COMPARATIVE-STUDY OF 3 DENTAL-X-RAY FILMS, Dento-maxillo-facial radiology, 26(4), 1997, pp. 201-205
Objective: To investigate the radiographic contrast of three dental X-
ray films (Ultra-speed, Ektaspeed and Ektaspeed Plus, Eastman-Kodak, R
ochester, NY, USA). Methods: An aluminium stepwedge was radiographed f
or the objective assessment and a dried human mandibular segment inclu
ding the teeth for the subjective evaluation: In the objective assessm
ent, contrast was evaluated from the measured optic densities and the
results analysed statistically by the Kruskal-Wallis one-way Anova and
Mann-Whitney U test. Subjective evaluation was performed by 12 dentis
ts with a range of clinical experience and scores were assigned to fiv
e dental and bony structures. Results: In the objective evaluation the
re was no significant difference in contrast obtained with the Ultra-s
peed and Ektaspeed Plus films: both had significantly better contrast
than Ektaspeed film. The subjective assessment revealed that the major
ity of the dentists preferred either Ultra-speed or Ektaspeed Plus fil
ms for contrast. Conclusion: Radiographic contrast of Ektaspeed Plus d
id not differ significantly from Ultra-speed and both were superior to
Ektaspeed film.