The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1993
Filed:
Jan. 15, 1991
Willi Schulte, Tubingen, DE;
Freimut Vizethum, Schwetzingen, DE;
Walter Hund, Oberkirch-Stadelhofen, DE;
Friedrichsfeld AG Keramik- und Kunststoffwerke, Mannheim, DE;
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.