CHANGZHOU UNITED DENTAL MEDICAL INSTRUMENT CO.; LTD.
发明人:
SHUI, Yong,税勇,LONG, Yunfeng,龙云峰
申请号：
CNCN2018/088196
公开号：
WO2018/214937A1
申请日:
2018.05.24
申请国别(地区):
WO
年份:
2018
代理人:
摘要：
The present invention provides a root canal file with a non-continuous spiral cutting edge. The root canal file comprises a handle, a connecting part, a file body, and a spiral groove. The file body is connected to the handle via the connecting part. The file body has a conical shape. The spiral cutting edge is distributed on the file body. The spiral groove is provided at the periphery of the file body and runs in an axial direction. The spiral direction of the spiral groove runs opposite to the direction of the spiral cutting edge distributed on the file body. The present invention adopts a spiral groove so that an entire longitudinally cut portion forms a space for receiving debris. The space increases by 15-30% as the spiral groove deepens compared to the space produced by a file body in the prior art. Also, since the cutting edge is no longer continuous in a spiral direction the cutting edge is prevented from engaging continuously. The file body of the root canal file is significantly smaller than the file body in the prior art, allowing it to more easily enter the hole of an original root canal, achieving only enlargement of the root canal while performing continuous cutting and effectively avoiding perforation through side walls of the root canal and formation of steps in the root canal.La présente invention concerne une lime de canal radiculaire munie dun bord de coupe en spirale non continu. La lime de canal radiculaire comprend une poignée, un élément de liaison, un corps de lime et une rainure en spirale. Le corps de lime est relié à la poignée par lintermédiaire de lélément de liaison. Le corps de lime possède une forme conique. Le bord de coupe en spirale est réparti sur le corps de lime. La rainure en spirale est disposée à la périphérie du corps de lime et sétend dans une direction axiale. La direction en spirale de la rainure en spirale sétend à lopposé de la direction du bord de coupe en spirale réparti sur le corps de lime. Selon la présente invent
