Patent · US Expired

Dental tomography apparatus

US4418419A · kind A · utility

8Cited by

6References

10Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Peter Schreiber · Jena, DE
Eberhard Steenfadt · Stade, DE
Gerard P. M. Bergman · Eindhoven, NL

Key dates

Filing date	Sep 10, 1982
Grant date	Nov 29, 1983
Priority date	—
Expiry date	Sep 10, 2002

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B6/51
WIPO fieldControl
WIPO sectorInstruments

Abstract

A dental tomography apparatus comprises three drive motors for displacing the film and the X-ray source in two mutually perpendicular directions in a horizontal plane and for pivoting the carrier which connects the film and the X-ray source. The control signals for the motor drives are derived from the contour of the dentition by means of a plate which is covered by contacts on which the patient exerts a pressure by biting, so that the contacts whose position corresponds to the shape of the dentition are actuated. Therefrom, the contour of the dentition is determined by an arithmetic unit which supplies the control signals for the drive motors.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.