Method and apparatus for repositioning teeth

• US 20070065771A1
• Filed: 09/19/2005
• Published: 03/22/2007
• Est. Priority Date: 09/19/2005
• Status: Active Grant

• Current Assignee: JOE Dentist Incorporated
• Original Assignee: JOE Dentist Incorporated
• Inventors: Kohani, Kambiz
• Granted Patent: US 7,377,779 B2
• Time in Patent Office: Days
• US Class Current: 433/74
• CPC Class Codes: A61C 7/00 Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
• CPC Class Codes: A61C 9/00 Impression cups, i.e. impression trays; Impression methods computer-assisted sizing A61C13/0004; instruments for determining occlusion A61C19/05
• CPC Class Codes: G09B 23/283 for dentistry or oral hygiene G09B23/286 takes precedence
• CPC Class Codes: G09B 23/32 with moving parts
• CPC Class Codes: G09B 23/34 with removable parts

Abstract

A system for straightening teeth includes a casting of teeth that is made of a rigid material, and a gum casting made of a flexible material that is joined to the teeth casting. A respective articulating tool for each tooth is provided with a post that is embedded into the tooth. Tooth moving components, accessible through the gum casting, are mounted on each post to selectively provide for left-right, fore-aft, and rotational tooth movements. In its operation, the system involves selectively orienting individual teeth in the teeth casting, to prepare a series of sequentially useable appliances that will straighten teeth in accordance with a pre-planned procedure.

Claims

1. A device for reconfiguring a model dental structure which comprises:

a casting of a plurality of teeth, wherein the teeth casting is made of a rigid material;

a casting of a gum, wherein the gum casting is made of a flexible material and is positioned in contact with the teeth casting;

a plurality of elongated posts, with each post having a first end and a second end, wherein the first end of each post is embedded in a respective tooth of the teeth casting with the second end of the post extending therefrom and into the gum casting; and

an articulating tool respectively engageable with the second end of each of the posts for selectively and independently orienting each post and the tooth therewith, to reconfigure the dental structure.

2. A device as recited in claim 1 further comprising a support casting made of the rigid material, wherein the support casting is positioned in contact with the gum casting, and wherein the gum casting is positioned between the teeth casting and the support casting, and further wherein the support casting contacts each articulating tool to stabilize the plurality of posts on the device.

3. A device as recited in claim 1 wherein the articulating tool comprises:

a main shaft having a proximal end and a distal end, and defining an axis;

a first component mounted on the distal end of the main shaft for back and forth movement in a first radial direction;

a first means for selectively moving the first component to a predetermined position;

a second component mounted distally on the first component for back and forth movement in a second radial direction, wherein the second radial direction is substantially perpendicular to the first radial direction, and wherein the second end of the post is mounted on the second component for universal rotation thereon;

a second means for selectively moving the second component to a predetermined position; and

a clamping means for fixedly holding the second end of the post on the second component to orient the prosthetic tooth.

4. A device as recited in claim 3 wherein the first moving means is a lead screw.

5. A device as recited in claim 3 wherein the second moving means is a rack and pinion.

6. A device as recited in claim 3 wherein said first moving means is the second moving means.

7. A device as recited in claim 1 wherein the rigid material is a hard durable urethane.

8. A device as recited in claim 1 wherein the flexible material is a polyurethane elastomer.

9. A system for orienting a prosthetic tooth in a model dental structure, the system having an articulating tool which comprises:

a main shaft having a proximal end and a distal end, and defining an axis;

a first component mounted on the distal end of the main shaft for back and forth movement in a first radial direction;

a first means for selectively moving the first component to a predetermined position;

a second component mounted distally on the first component for back and forth movement in a second radial direction, wherein the second radial direction is substantially perpendicular to the first radial direction;

a second means for selectively moving the second component to a predetermined position;

a post for holding the prosthetic tooth, the post having an end thereof swivel mounted on the second component for universal rotation about a point thereon; and

a clamping means for fixedly holding the post at the point on the second component to orient the prosthetic tooth.

10. A system as recited in claim 9 wherein the model dental structure includes a teeth casting made of a rigid material having a plurality of teeth, with a respective articulating tool for each tooth in the teeth casting.

11. A system as recited in claim 10 further comprising:

a casting of a gum, wherein the gum casting is made of a flexible material and is positioned in contact with the teeth casting; and

a support casting made of the rigid material, wherein the support casting is positioned in contact with the gum casting, and wherein the gum casting is positioned between the teeth casting and the support casting, and further wherein the support casting contacts each articulating tool to stabilize the plurality of posts on the device.

12. A system as recited in claim 11 wherein the rigid material is a hard, durable urethane and the flexible material is a polyurethane elastomer.

13. A system as recited in claim 9 wherein the first moving means is a lead screw.

14. A system as recited in claim 9 wherein the second moving means is a rack and pinion.

15. A method for manufacturing a system for orienting prosthetic teeth in a model dental structure which comprises the steps of:

creating an impression of a plurality of teeth in a dental structure of a patient;

positioning a plurality of articulating tools in the impression, wherein each tool includes a post and each post is positioned relative to a respective tooth defined in the impression;

making a teeth casting of the plurality of teeth, wherein the teeth casting is made of a rigid material, and wherein each post is embedded in a respective tooth of the teeth casting;

forming a gum casting, wherein the gum casting is made of a flexible material and is positioned in contact with the teeth casting to surround portions of each articulating tool; and

establishing a support casting made of the rigid material, wherein the support casting is positioned in contact with the gum casting, and wherein the gum casting is positioned between the teeth casting and the support casting, and further wherein the support casting contacts each articulating tool to stabilize the plurality of posts on the device.

16. A method as recited in claim 15 wherein the rigid material is a hard durable urethane and the flexible material is a polyurethane elastomer.

17. A method as recited in claim 15 wherein an articulating tool comprises:

a main shaft having a proximal end and a distal end, and defining an axis;

a first component mounted on the distal end of the main shaft for back and forth movement in a first radial direction;

a second component mounted distally on the first component for back and forth movement in a second radial direction, wherein the second radial direction is substantially perpendicular to the first radial direction;

a post for holding the prosthetic tooth, the post having an end thereof swivel mounted on the second component for universal rotation about a point thereon; and

a means for fixedly holding the post at the point on the second component to orient the prosthetic tooth.

18. A method as recited in claim 17 further comprising the steps of:

selectively moving the first component to a predetermined position;

selectively moving the second component to a predetermined position; and

clamping the post holding means.

19. A method as recited in claim 17 wherein the first moving means is a lead screw.

20. A method as recited in claim 17 wherein the second moving means is a rack and pinion.