Ultrasonic tip assembly

Patent metadata

Field	Value
Publication number	US-10130451-B2
Application number	US-201715785621-A
Country	US
Kind code	B2
Filing date	Oct 17, 2017
Priority date	Jan 24, 2013
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

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.

First claim

What is claimed is:

1. A tip assembly for use with a dental tool, the tip assembly comprising:
a housing having a conduit for attaching to the dental tool;
an inner aspiration needle having a passageway extending at least partially through needle, a substantial length of the needle, or at least from one end to the other end the passageway providing a single continuous path to aspirate the irrigant and debris from the root canal cavity of the tooth; and
a plurality of outer wires, surrounding inner aspiration needle; and
wherein the inner aspiration needle and outer wires are connected together at a point or along a portion therebetween to achieve a first predetermined resonant frequency of the inner aspiration needle, and
wherein the plurality of outer wires extend spirally around the aspiration needle;
wherein the plurality of outer wires includes a first outer wire and a second outer wire, the first outer wire extending spirally around the aspiration needle and a tip portion of the second outer wire being bent or curved away from the aspiration needle.

2. A tip assembly for use with an ultrasonic transducer comprising:
an abrading needle operatively connected to the ultrasonic transducer;
said abrading needle having a working tip and a connecting end;
at least one groove on the exterior of said needle; and
a sleeve at least partially covering said at least one groove;
such that a fluid passageway is effectively formed between said at least one groove and said sleeve.

3. A tip assembly as in claim 2 , wherein said sleeve is formed from a tube.

4. A tip assembly as in claim 3 wherein said tube is metal, plastic or rubber.

5. A tip assembly as in claim 3 wherein said tube is made from a medical grade, shrink tube material.

6. A tip assembly as in claim 2 further comprising a conduit positioned between said abrading needle and the ultrasonic transducer.

7. A tip assembly as in claim 6 , wherein said conduit includes a fluid passageway fluidly connecting a source of pressurized fluid with said at least one groove.

Assignees

• Dentsply Sirona Inc

Inventors

• Maxwell Randall
• Wilkinson Kevin

Classifications

• A61C3/03

  Instruments operated by vibration · CPC title

• A61C17/043

  Human Necessities · mapped topic

• A61C17/0208

  combined with means providing suction (A61C17/0211 takes precedence) · CPC title

• A61C17/0202 Primary

  Hand-pieces · CPC title

• A61C5/42

  Files for root canals; Handgrips or guiding means therefor · CPC title