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:
Nov. 13, 2018
Filed:
Feb. 24, 2016
Chang Taek Lee, Gwangmyeong-Si, KR;
Rafael Wonjun Choi, Clarksburg, MD (US);
Chang Taek Lee, Gwangmyeong-Si, KR;
Rafael Wonjun Choi, Clarksburg, MD (US);
Other;
Abstract
A method and apparatus for producing a dental restoration with enhanced adhesive or bonding strength are disclosed. The dental restoration comprises a zirconia based crown and a porcelain layer built-up on a top surface of the zirconia based crown. The zirconia based crown is to be bonded to a top of an abutment tooth and has dimensions that are smaller than outer dimensions of the abutment tooth. A first surface of the zirconia based crown is configured to adhere to the abutment tooth and a second surface of the zirconia based crown is configured to receive the porcelain layer built-up. The first surface and the second surface of the zirconia based crown are treated with a surface treatment solution which includes at least nitric acid (HNO), hydrofluoric acid (HF) and hydrogen peroxide (HO). Further, the zirconia based crown may be treated with an ultrasonic impact treatment in addition to the surface treatment of the zirconia based crown.