Patent · US Expired

Dental implant

US5199873A · kind A · utility

96Cited by

7References

20Claims

0Family size

Assignee

Friedrichsfeld AG Keramik- und Kunststoffwerke · DE

Inventors

Willi Schulte · Chemnitz, DE
Freimut Vizethum · Mannheim, DE
Walter Hund · Hollfeld, DE

Key dates

Filing date	Jan 15, 1991
Grant date	Apr 6, 1993
Priority date	—
Expiry date	Jan 15, 2011

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61C8/0045
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A dental implant including a post which can be anchored in the jawbone of a dental patient and a replacement tooth head fastenable to said post. The post has at its crown end a recess for mounting a replacement tooth. The outside surface of the post is stepped down in at least two, and preferably three or four, steps to an apical root end opposite said crown end. At least one of the steps carries an external screw thread, and of two adjacent steps, the step closer to the apical root end has a thread crest diameter which is not larger than the base diameter of the adjacent step situated closer to the crown end of the implant.

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