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:
Dec. 11, 2018
Filed:
May. 24, 2017
Shenzhen Superline Technology Co., Ltd., Shenzhen, CN;
Zhong Wang, Shenzhen, CN;
SHENZHEN SUPERLINE TECHNOLOGY CO., LTD., Shenzhen, CN;
Abstract
A NiTi alloy root canal file with a flexibility gradient, having a tip, middle portion and rear portion divided along the longitudinal direction. The internal microstructure of the tip is martensite, of the rear portion is austenite, and of the middle portion is a combination of martensite and austenite. The microstructure of martensite is continuously reduced and the microstructure of austenite is continuously increased as the distance from the tip increases. A manufacturing method for the NiTi alloy root canal file with a flexibility gradient. As the internal microstructure of the NiTi alloy root canal file with a flexibility gradient gradually changes along the axial direction and the strength also gradually changes, the flexibility and strength show a gradient change along the axial direction of the root canal file, providing excellent cutting property, high anti-fatigue life and significantly improving operation performance, safety, and life of the root canal files.