Process for the optical distinction of a dental material and dental material for said process

US5102461A · kind A · utility

Assignee

• Ivoclar AG · LI

Inventors

• Volker Rheinberger · Vaduz, LI
• Ulrich Salz · Gettorf, DE
• Gilbert Ott · Nendeln, LI

Key dates

• Filing date: Nov 30, 1990
• Grant date: Apr 7, 1992
• Expiry date: Nov 30, 2010

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K6/65
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

In a method for the optical distinction of a dental material applied to a substrate from natural teeth, false teeth or parts thereof 0.00001 to 1% by wt. of a fluorescent substance having an absorption maximum in the wave length range of 360 to 480 nm and a fluorescence maximum in the wave length range of 480 to 600 nm is incorporated in the dental material, the dental material is applied to the substrate and irradiated with a light source emitting light of a wave length in the region of 360 to 480 nm and is then viewed through a light filter filtering out at least partially the light of a wave length in the region of 360 to 480 nm.