Method and apparatus for recording medical objects, in particular for recording models of prepared teeth

US6614538B1 · kind B1 · utility

Assignee

• SIRONA Dental Systems GmbH · DE

Inventors

• Franz Basler · Hemsbach, DE
• Thomas Hasenzahl · Darmstadt, DE
• Joachim Pfeiffer · Bensheim, DE
• Axel Schwotzer · Groß-Gerau, DE

Key dates

• Filing date: Oct 18, 2000
• Grant date: Sep 2, 2003
• Expiry date: Feb 23, 2021

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61C9/0053
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An apparatus for recording medical objects, in particular for recording models of prepared teeth, comprising a position-sensitive sensor (2), which is movable in the projection direction, with a projection unit and a receiving unit (13-15; 18-21), and with a certain triangulation angle (&agr;) located between the projection path of the rays (10) of the projection unit (13-15) and the observation path of the rays (11) of the receiving unit (18-21), and with the projection path of the rays (10) aligned parallel to the direction of movement of the sensor (2), is realized for the accurate recording action of edges and steep surfaces of the type that occur in tooth cavities with a triangulation angle (&agr;) that is smaller than 10°, preferably smaller than 5°.