Patent · US Expired

Artificial tooth

US5548000A · kind A · utility

8Cited by

9References

7Claims

0Family size

Assignee

HERAEUS KULZER GMBH · DE

Inventors

Joachim Nagel · Friedrichsdorf, DE
Albert Erdrich · Bad Nauheim, DE

Key dates

Filing date	Mar 23, 1995
Grant date	Aug 20, 1996
Priority date	—
Expiry date	Mar 23, 2015

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K6/887
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

An artificial tooth of polymethacrylate, barium aluminum silicate glass and microfine silicon dioxide is described that imitates the natural tooth in its essential properties, namely mechanical strength and abrasion performance as well as transparency and depth of color. The tooth contains 15 to 35 weight % polymethacrylate, 35 to 75 weight % barium aluminum silicate glass with a mean particle size of from 0.1 to 5 micrometers, and 5 to 25 weight % silicon dioxide with a mean particle size of from 0.01 to 0.2 micrometers. In addition pigments necessary to match cosmetic requirements, are normally added as necessary.

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