Ultrasonic tip assembly

Patent metadata

Field	Value
Publication number	US-9820834-B2
Application number	US-201414162793-A
Country	US
Kind code	B2
Filing date	Jan 24, 2014
Priority date	Jan 24, 2013
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

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 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;
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; and
wherein the aspiration needle and irrigation needle are connected together at a point or along a portion therebetween to achieve a first predetermined resonant frequency of the aspiration needle.

2. The tip assembly according to claim 1 , wherein the dental tool has an L-T mode ultrasonic energy generator positioned therein.

3. The tip assembly according to claim 1 , wherein the energy generated by the ultrasonic energy generator is translated into movement of the aspiration needle to provide optimum cleaning of the root canal.

4. The tip assembly according to claim 1 , wherein the energy generated by the ultrasonic energy generator is translated into movement of the irrigation needle inside the coronal aspect of the tooth to provide optimum cleaning of the root canal and/or pulp chamber.

5. The tip assembly according to claim 1 , wherein the at least one irrigation needle is a plurality of irrigation needles is between 2-5.

6. The tip assembly according to claim 1 , wherein the at least one aspiration needle is a plurality of aspiration needles is between 2-5.

7. The tip assembly according to claim 1 , wherein the at least one irrigation needle is connected to the at least one aspiration needle at a point or along a portion therebetween inside the housing.

8. The tip assembly according to claim 1 , wherein the at least one irrigation needle dampen vibrations and allow the at least one aspiration needle to vibrate on its own at the first predetermined resonant frequency.

9. The tip assembly according to claim 1 , wherein the at least one irrigation needle vibrates at a second predetermined resonant frequency inside the coronal opening of a tooth, the first predetermined resonant frequency of the at least one aspiration needle being different than the second predetermined resonant frequency of the at least one irrigation needle.

10. The tip assembly according to claim 1 , wherein at a tip portion of the at least one irrigation needle is bent or curved away from the at least one aspiration needle.

11. The tip assembly according to claim 1 , wherein at a tip portion of the at least one aspiration needle is bent or curved away from the at least one irrigation needle.

12. The tip assembly according to claim 1 , wherein the at least one irrigation needle is shorter than the at least one aspiration needle.

13. The tip assembly according to claim 12 , wherein the at least one aspiration needle and the at least one irrigation needle include a working portion such that a ratio of the working portion of the at least one aspiration needle to the working portion of the at least one irrigation needle ranges from about 0.5 to about 5, preferably from about 2 to about 4, and most preferably from about 2.5 to about 3.5.

14. The tip assembly according to claim 1 , wherein the at least one aspiration needle is shorter than the at least one irrigation needle.

15. The tip assembly according to claim 14 , wherein the at least one irrigation needle and the at least one aspiration needle include a working portion such that a ratio of the working portion of the at least one irrigation needle to the working portion of the at least one aspiration needle ranges from about 0.5 to about 5, preferably from about 2 to about 4, and most preferably from about 2.5 to about 3.5.

16. The tip assembly according to claim 1 , wherein the at least one irrigation needle includes a plurality of irrigation needles having a working portion, the working portions varying in length.

17. The tip assembly according to claim 1 , wherein the at least one aspiration needle includes a plurality of aspiration needles having a working portion, the working portions varying in length.

18. The tip assembly according to claim 1 , wherein the plurality of irrigation needles have a working portion, the working portions having the same lengths or of varying lengths relative to each other so that they reach different depths of the coronal opening.

19. The tip assembly according to claim 1 , wherein the plurality of aspiration needles have a working portion, the working portions having the same lengths or of varying lengths relative to each other so that they reach different depths of the coronal opening.

20. The tip assembly according to claim 1 , wherein the at least one irrigation needle includes an inner irrigation needle and the at least one aspiration needle is a plurality of outer aspiration needles surrounding the inner irrigation needle.

21. The tip assembly according to claim 1 , wherein the at least one irrigation needle is only one irrigation needle and the at least one aspiration needle is only one aspiration needle juxtaposed to the only one irrigation needle.

22. The tip assembly according to claim 1 , wherein the at least one aspiration needle and/or the at least one irrigation needle includes a working portion having a length that ranges from about 5 to about 40 mm.

23. The tip assembly according to claim 1 , wherein the at least one aspiration needle and/or the at least one irrigation needle includes a working portion having a length that ranges from about 15 to about 30 mm.

24. The tip assembly according to claim 1 , wherein the at least one aspiration needle and/or the at least one irrigation needle includes a working portion having a length that ranges from about 2 to about 10 mm.

25. The tip assembly according to claim 1 , wherein the at least one aspiration needle and/or the at least one irrigation needle includes a working portion and a proximal portion such that a ratio of the working portion to the proximal portion ranges from about 0.25 to about 3.0.

26. 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 irrigation needle having a passageway extending at least partially through needle, substantial length of the needle, or at least from one end to the other end, the passageway providing a single continuous flow path for delivering fluid/irrigant from a reservoir at the proximal end of the irrigation needle to a root canal/coronal opening of a tooth at the distal end of the irrigation needle;
a plurality of outer aspiration needles, surrounding inner irrigation needle, each having a passageway extending at least partially through the plurality of aspiration needles, substantial length of the plurality of aspiration needles, or at least from one end to the other end, the passageway providing a single co

Assignees

• Dentsply Int Inc

Inventors

• Maxwell Randall
• Wilkinson Kevin

Classifications

• A61C17/0202 Primary

  Hand-pieces · CPC title

• A61C5/42

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

• A61C3/03

  Instruments operated by vibration · CPC title

• A61C17/02

  Rinsing or air-blowing devices, e.g. using fluid jets {or comprising liquid medication} (combined with receptacles for spittle A61C17/14; combined with power-driven cleaning or polishing devices A61C17/16) · CPC title

• A61C17/043

  Human Necessities · mapped topic