# US 11,439,486 B2 · Root canal treatment apparatus

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- Number: US 11,439,486 B2
- Document ID: US11439486B2
- Status: Granted
- Kind: B2
- Application number: 16/690,492
- Filed: 2019-11-21
- Published: 2020-03-19
- Granted: 2022-09-13
- Earliest claimed: 2017-05-24
- Assignees: Seoul National University R&Db Foundation
- Applicants: Seoul National University R&Db Foundation
- Inventors: Ho-Young Kim; Shin Hye Chung; Dohyun Jung; Won Jun Shon; Junhee Choi
- Web page: https://patentgrep.com/patent/US11439486B2

## CPC

- A61C 17/02: 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)
- A61C 5/40: Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots
- A61C 5/50: Implements for filling root canals; Methods or instruments for medication of tooth nerve channels
- A61C 17/0208: {combined with means providing suction (A61C17/0211 takes precedence)}
- A61C 17/20: using ultrasonic waves
- A61K 6/00: Preparations for dentistry
- A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00)
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)

## Abstract

The present invention relates to a root canal treatment apparatus for cleaning a root canal, a root canal treatment apparatus for charging a root canal, or a root canal treatment apparatus for cleaning and charging a root canal. The root canal treatment apparatus for cleaning a root canal according to the present invention comprises: a storage container for storing a cleaning liquid or a filler supplied from the outside; an ultrasonic oscillator for applying ultrasonic waves to the cleaning liquid or the filler stored in the storage container; an injection port for injecting, around the root canal, the cleaning liquid or the filler to which the ultrasonic waves have been applied in the storage container; and a nozzle having a suction port for sucking the cleaning liquid or bubbles in the root canal or the bubble.

## Claims

### Claim 1

A root canal treatment apparatus, comprising:
a storage container configured to store a cleaning liquid which is supplied from the outside of the root canal treatment apparatus;
an ultrasonic oscillator configured to apply ultrasonic waves to the cleaning liquid stored in the storage container and adjust a frequency of the ultrasonic oscillator to generate bubbles in the cleaning liquid stored in the storage container; and
a nozzle including an injection line, wherein a first end of the injection line is connected to the storage container and a second end of the injection line is configured to output the cleaning liquid, including the generated bubbles, the outside of the root canal treatment apparatus,
wherein a cross sectional area of the injection line is smaller than a cross sectional area of the storage container such that sizes of the bubbles in the cleaning liquid at the second end of the injection line are smaller than sizes of the bubbles in the cleaning liquid stored in the storage container,
wherein the root canal treatment apparatus is capable of cleaning the root canal,
wherein the nozzle further includes an inclined line in which an inclined port for injecting the cleaning liquid from the injection port, at an inclined angle from 0° to 90° is formed and which is formed to protrude from one end of the injection line, and
wherein the inclined port is provided as a plurality of holes formed at an end of the inclined line.

### Claim 2 (depends on 1)

The root canal treatment apparatus of claim 1, wherein:
the second end of the injection line includes an injection port;
the nozzle includes a suction port;
the injection port of the nozzle is formed as a hole passing straight through the nozzle; and
the suction port of the nozzle is formed in an annular shape to surround the injection port.

### Claim 3

A root canal treatment apparatus, comprising:
a storage container configured to store a filling material for filling of a root canal;
an ultrasonic oscillator configured to apply ultrasonic waves to the filling material stored in the storage container; and
a nozzle including an injection line, wherein a first end of the injection line is connected to the storage container and a second end of the injection line is configured to discharge the filling material toward a root canal;
a suction line with a suction port for suctioning air in the root canal; and
a pressurizing part configured to pressurize the filling material in the storage container and to discharge the filling material through the nozzle,
wherein the root canal treatment apparatus is configured to simultaneously operate the ultrasonic oscillator to apply ultrasonic waves to the filling material to lower the viscosity of the filing material, operate the pressurizing part to pressurize the filling material with lowered viscosity to be discharged through the nozzle, and operate the suction line to suction air in the root canal,
wherein the nozzle further includes an inclined line with an inclined port for injecting the filling material, which is injected from the injection port at an inclined angle from 0° to 90°, and wherein the injected port protrudes from one end of the injection,
wherein the inclined port is provided as one or more inclined ports which are radially formed from a center of one end of the injection port, and
wherein the inclined port is provided as a plurality of holes formed at an end of the inclined line.

### Claim 4 (depends on 3)

The root canal treatment apparatus of claim 3, wherein the filling material is formed of flowable root canal filling materials.

### Claim 5 (depends on 3)

The root canal treatment apparatus of claim 3, wherein:
the second end of the injection line includes an injection port;
the nozzle includes a suction port;
the injection port of the nozzle is formed as a hole passing straight through the nozzle; and
the suction port of the nozzle is formed in an annular shape to surround the injection port.