公开(公告)号：US10351934B2

公开(公告)日：2019-07-16

申请号：US14541872

申请日：2014-11-14

Applicant: DENTSPLY SIRONA Inc.

Inventor： Dan Ammon ,  Vincent Shotton ,  Yong Gao ,  Randall Maxwell

IPC: C22F1/10 ,  C22C18/02 ,  C21D6/00 ,  C21D9/00 ,  C22C9/00 ,  C22C9/06 ,  C22C19/03 ,  C22C30/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/40 ,  C22F1/00 ,  C22F1/08 ,  A61C5/42

Abstract: A method for manufacturing a nonlinear superelastic file comprising the steps of: providing a superelastic file having a shaft and a file axis; providing a fixture including a file groove being defined by one or more displacement members, the file groove configured for receiving the shaft; inserting at least a portion of the shaft into the fixture along the file groove, the portion of the shaft including a first portion of the shaft; contacting the first portion of the shaft with a first displacement member of the one or more displacement members such that the first portion of the shaft is displaced from the file axis thereby forming a first offset portion of the shaft; heating the portion of the shaft while inserted in the fixture to a temperature of at least about 300° C. for a time period of at least about 1 minute to shape-set the portion of the shaft thereby forming a shape-set nonlinear file.

公开(公告)号：US10130451B2

公开(公告)日：2018-11-20

申请号：US15785621

申请日：2017-10-17

Applicant: DENTSPLY SIRONA Inc.

Inventor： Randall Maxwell ,  Kevin Wilkinson

IPC: A61C5/00 ,  A61C17/02 ,  A61C3/03 ,  A61C5/42 ,  A61C17/06

Abstract: A tip assembly for use with a dental tool, the tip assembly comprising a housing for attaching to the dental tool, at least one aspiration needle having a passageway extending at least partially through the aspiration needle, a substantial length of the aspiration needle, or at least from one end to the other end of the aspiration needle, the passageway providing a single continuous path to aspirate the irrigant and/or debris from the root canal cavity of the tooth, and at least one irrigation needle having a passageway extending at least partially through the irrigation needle, a substantial length of the irrigation needle, or at least from one end to the other end of the irrigation needle, the passageway provides a continuous flow path for delivering fluid/irrigant from a reservoir in communication with a proximal end of the irrigation needle to the distal end of the irrigation needle and into a root canal/coronal opening of a tooth.