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PubMedDate not supplied

[The Ultradent apparatus for removing dental calculus].

New device for removal of dental calculus "Ultradent" is considered. Base functional units and their interaction are described. Technical specification of the device is reported. Serial production of the device was started from 1987.

Dental Calculus↗
PubMed1998

Simple X-ray film holder for lateral view of the anterior jaws using dental X-ray apparatus.

A new X-ray apparatus, the occlusal X-ray film holder, was devised so that the lateral view of the jaw could be studied. This apparatus could easily be adjusted to a dental X-ray cone. In 21 cases of impacted teeth, cysts or foreign body in the maxilla and mandible and 6 cases that necessitated examination before or after implantation, the efficacy of this apparatus was confirmed. Its advantages are: it is applicable to dental X-ray equipment; it is cheap; there is no need for image intensifying to get a clear image; and follow-up examination is possible. We believe that this film holder would be useful for the diagnosis of lesions in the anterior maxilla and mandible as well as in the general dental clinic.

Foreign Bodies↗
PubMed1992

A method for experimental dental radiography.

An apparatus was designed for experimental dental radiography, which permitted separate adjustment of the subject, target and film. The precision of the apparatus was tested by radiographing a test subject, consisting of small steel globes embedded in a plastic plate. The subject was placed in the apparatus and exposed 30 times on dental X-ray film with different adjustments of angles and distances. All exposures were repeated after readjustment of the same form. Three linear distances between pairs of the projected steel globes were selected and measured on each radiograph. Depending on the different orientations of film, target and subject, the distances measured ranged from 9.0-11.1 mm, from 7.0-10.7 mm and from 12.7-17.3 mm, respectively. From the measurements on the radiographs the error of method was calculated to be 0.07-0.08 mm and the error of measurement to be 0.05-0.06 mm. The precision of the apparatus was thus found to be adequate for measurement of differences in small, but clinically relevant, distances.

Dental Pulp Cavity↗