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:
Jan. 02, 1996
Filed:
Mar. 22, 1994
Farrokh Farzin-Nia, Inglewood, CA (US);
William R Otsen, Glendora, CA (US);
Ormco Corporation, Glendora, CA (US);
Abstract
Orthodontic appliances having improved bonding characteristics and methods of making such orthodontic appliances are disclosed. The appliances have a metal bonding base and tooth contact surface. A primary mechanical interlock retention surface is applied to the tooth contact surfaces. The primary retention surface may be 1) a mesh, 2) a layer of metallic or non-metallic particles, or 3) grooves, including undercuts, formed in the tooth contact surface. The appliances may also include a secondary mechanical bond strength enhancement treatment. Suitable secondary enhancement treatments include 1) surface toughening, 2) particles applied to the primary retention surface, and 3) a chemically activatable material, such as SiO.sub.2, deposited on the primary retention surface. Chemical activation may also be used to activate the chemically activatable material, such as silanation of SiO.sub.2.