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:
Jun. 06, 2000
Filed:
May. 06, 1999
Beat Kilcher, Bosco Luganese, CH;
Beat A von Weissenfluh, Gentilino, CH;
Hawe Neos Dental Dr. H. von Weissenfluh AG, Bioggio, CH;
Abstract
The adhesion of dental restorative materials, more particularly of composite materials containing an organic binder, to dental instruments can be reduced, essentially independently of the material of which the dental instrument is made, by providing the working surfaces with impressions. These impressions result in a reduction of the contact surface of the composite material on the working surface and thus in a reduction of the component of the adhesion which is due to physical attraction, e.g. to the van der Waals force. If the impressions are sufficiently small, a penetration of the composite material into the impressions is prevented by the high viscosity of the latter alone. If additionally the impressions are capable of being sealed by the tooth replacement material in contact therewith, an air cushion forms in the impressions which additionally counteracts a penetration of the tooth replacement material.