An evaluation of Ektaspeed Plus film versus Ultraspeed film for endodontic working length determination.

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 approximately 50% of the radiation needed for Ultraspeed film.

Filmless radiology--now and in the future.

Many changes have occurred in the technology used to acquire dental images. Most of the research has been directed to reducing radiation to the patient while maintaining excellent diagnostic quality. With the introduction of computer technology and monitors, the patient is exposed to less radiation while diagnostic capabilities for the dental practitioner are enhanced. When this exciting, emerging technology is more fully utilized in practice, there will be great benefits to the patient and the dental profession alike.

Chorda tympani nerve injury following inferior alveolar injection: a review of two cases.

Permanent nerve injury following the injection of local anesthetic during dental procedures is rare. Two cases of chorda tympani nerve injury shown by ageusia are presented.