# US 10,245,128 B2 · Damping dental root post key

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- Number: US 10,245,128 B2
- Document ID: US10245128B2
- Status: Granted
- Kind: B2
- Application number: 15/254,281
- Filed: 2016-09-01
- Published: 2018-03-01
- Granted: 2019-04-02
- Earliest claimed: 2016-09-01
- Applicants: National Guard Health Affairs; King Saud bin Abdulaziz University for Health Sciences; King Abdullah International Medical Research Center
- Inventors: Bassam Nawaf Srayeddin
- Web page: https://patentgrep.com/patent/US10245128B2

## CPC

- A61C 13/30: Fastening of peg-teeth in the mouth
- A61C 8/0022: {Self-screwing (A61C8/0028 takes precedence)}
- A61C 8/0089: {Implanting tools or instruments}
- 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)

## Abstract

A damping dental post key configured to implant a dental root post for restoration of a tooth is described. The dental post key includes a body for handling and a post carrier having a key shape with respect to a head portion of the dental root post. During implantation of the dental post, rotation of the body compresses a set of springs in contact with the post carrier reducing a reaction force to a tooth root. In this way a limited force will be applied and a root fracture can be prevented. Further, the dental post key can be configured to have a fixed movement in a counterclockwise direction to remove the dental post and a free quarter-cycle movement with effort in a clockwise direction.

## Claims

### Claim 1

A dental post key to implant a dental root post in a tooth root, the dental post key comprising: a body having an exterior surface and an abutment on an inner surface; and a post carrier having a distal end configured to have an opening having a shape configured to receive the dental root post, a proximal end having a rigid elongated shape that is configured to be in contact with a first side of the abutment of the body, a flexible elongated shape that is configured to be in contact with a second side of the abutment of the body, the post carrier further having a second flexible elongated shape, wherein the flexible elongated shape is configured to have a first spring constant and the second flexible shape is configured to have a second spring constant that is different than the first spring constant, wherein, when the body is rotated, a combination of both flexible elongated shapes is configured to create a dynamic reaction force to implant the dental root post into the tooth root.

### Claim 2 (depends on 1)

The dental post key of claim 1, the body having a second abutment, wherein the rigid elongated shape of the post carrier is configured to be in contact with the first side of the abutment of the body, wherein the flexible elongated shape of the post carrier is configured to be in contact with the second abutment of the body.

### Claim 3

A method for implanting a dental root post, the method comprising:
matching a post carrier to a shape of the dental root post;
assembling a dental post key using the post carrier; and
rotating a body of the dental post key,
wherein a spring and a second spring are located between the post carrier and the body of the dental post key,
wherein, during the rotating, the post carrier is in direct contact with the dental root post, and the dental root post is in direct contact with a tooth root,
wherein the spring is configured to have a first spring constant, and the second spring is configured to have a second spring constant that is different than the first spring constant, and
wherein, during the rotating, each spring is configured to create a dynamic reaction force between the dental root post and the tooth root.