# US 2014/0197575 A1 · Device for injecting a filling material in the fluid phase into a canal space

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- Number: US 2014/0197575 A1
- Document ID: US20140197575A1
- Status: Published application
- Kind: A1
- Application number: 14/143,813
- Filed: 2013-12-30
- Published: 2014-07-17
- Earliest claimed: 2008-07-17
- Inventors: Stephen KOUBI
- Web page: https://patentgrep.com/patent/US20140197575A1

## CPC

- A61C 9/0026: {Syringes or guns for injecting impression material; Mixing impression material for immediate use}
- A61C 5/50: Implements for filling root canals; Methods or instruments for medication of tooth nerve channels
- A61C 5/64: for multi-component compositions
- A61C 2201/007: using shape memory effect
- Y10T 29/49567: Dental appliance making
- 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)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method is for fabricating a device for injecting a filler material in the fluid phase into a root canal space, the device including an adapter nozzle, an auto-mixer connected to the adapter nozzle, an intra-oral injection nozzle positioned at the upper end of the auto-mixer. The method includes using a shape memory material to make the injection nozzle so as to be bendable according to a desired orientation. The method also includes arranging on the exterior surface of the injection nozzle, circular ribs defining a groove, and moulding the upper end of the auto-mixer in this groove so that the injection nozzle is lodged in position in the upper end while retaining a degree of freedom in rotation around its axis of symmetry, or one or multiple circular ribs parallel to each other.

## Claims

### Claim at position 1

1-11. (canceled)

### Claim 12

A method for fabricating a device for injecting a filler material in the fluid phase into a root canal space, the device comprising an adapter nozzle, an auto-mixer connected to the adapter nozzle, an intra-oral injection nozzle positioned at the upper end of the auto-mixer, the method comprising the steps of:
using a shape memory material to make the injection nozzle so as to be bendable according to a desired orientation,
arranging on the exterior surface of the injection nozzle:
circular ribs defining a groove, and mold the upper end of the auto-mixer in this groove so that the injection nozzle is lodged in position in the upper end while retaining a degree of freedom in rotation around its axis of symmetry, or
one or multiple circular ribs parallel to each other, and mold the upper end of the auto-mixer on this circular rib so that the injection nozzle is lodged in position in the upper end while retaining a degree of freedom in rotation around its axis of symmetry.

### Claim 13 (depends on 12)

A method according to claim 12 wherein using includes making the injection nozzle have a constant external diameter less than or equal to 1.5 mm and greater than or equal to 0.75 mm, over a length greater than or equal to 8 mm.

### Claim 14

A method of making a device for injecting a filler material in the fluid phase into a root canal space, the method comprising:
making an injection nozzle by using a shape memory material, so that the injection nozzle is bendable to a desired orientation; and
molding an auto-mixer on the injection nozzle, so that the injection nozzle is lodged in position in the auto-mixer while retaining a degree of freedom in rotation around an axis of symmetry.

### Claim 15 (depends on 14)

A method according to claim 14 wherein making the injection nozzle includes making the injection nozzle to include
a groove on a external surface; and
molding includes molding an upper end of the auto-mixer the groove.

### Claim 16 (depends on 14)

A method according to claim 14 wherein making the injection nozzle includes
making the injection nozzle to include a circular rib; and
molding includes molding an upper end of the auto-mixer on the circular rib.

### Claim 17 (depends on 16)

A method according to claim 16 wherein making the injection nozzle further includes making a plurality of circular ribs parallel to each other.

### Claim 18 (depends on 14)

A method according to claim 14 further including directly molding the auto-mixer on an outlet of a cartridge, the cartridge including two compartments configured to contain respectively a base and a catalyst.

### Claim 19 (depends on 18)

A method according to claim 18 wherein the cartridge 14 is configured to enable ejection, on demand of a practitioner, of the base and catalyst to the outlet.

### Claim 20 (depends on 14)

A method according to claim 14 wherein making includes making the injection nozzle have a constant external diameter less than or equal to 1.5 mm and greater than or equal to 0.75 mm, over a length greater than or equal to 8 mm.