# US 9,750,582 B1 · Endodontic therapy system, apparatus and method making use of a disposable CT registration tray device with pre-set radiographic registration markers

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- Number: US 9,750,582 B1
- Document ID: US9750582B1
- Status: Granted
- Kind: B1
- Application number: 14/734,811
- Filed: 2015-06-09
- Granted: 2017-09-05
- Earliest claimed: 2014-06-09
- Applicants: L. Stephen Buchanan
- Inventors: L. Stephen Buchanan
- Web page: https://patentgrep.com/patent/US9750582B1

## CPC

- A61C 9/0006: {Impression trays}
- A61B 90/39: {Markers, e.g. radio-opaque or breast lesions markers}
- A61C 1/082: {Positioning or guiding, e.g. of drills}
- 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 9/004: {Means or methods for taking digitized impressions}
- A61B 6/032: {Transmission computed tomography [CT]}
- A61B 6/0492: {using markers or indicia for aiding patient positioning}
- A61B 6/51: for dentistry
- A61B 2090/3966: {Radiopaque markers visible in an X-ray image}
- A61C 1/084: {of implanting tools}
- A61C 19/05: for determining occlusion
- 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A system for endodontic therapy includes a radio-opaque tray having three or more fiduciary markers embedded in the tray, a leveling device, and one or more bite stops arranged to ensure maintenance of adequate bite registration or impression material between opposing teeth to allow 3D reconstruction of occlusal surfaces.

## Claims

### Claim 1

A system for endodontic therapy, the system comprising:
a scanning appliance including a radio-opaque tray including three or more fiduciary markers embedded in the tray, a leveling device arranged to limit a height of an artifacted coronal zone, and one or more bite stops, and
a virtual endodontic treatment plan including a scan of the scanning appliance and at least one access path to a root canal,
the bite stops arranged to ensure maintenance of adequate bite registration or impression material between opposing teeth.

### Claim 2 (depends on 1)

A system according to claim 1 wherein the three or more fiduciary markers are located on an inside or outside surface of the tray.

### Claim 3 (depends on 1)

A system according to claim 1 wherein each fiduciary marker, the leveling device, and the one or more bite stops do not artifact or appear on a scanned image.

### Claim 4 (depends on 1)

A system according to claim 1 wherein the leveling device is a bubble.

### Claim 5 (depends on 1)

A system according to claim 1 further comprising an aiming device arranged to show a boundary of a canal volume.

### Claim 6

A system for endodontic therapy, the system comprising:
a scanning appliance including a radio-opaque tray including three or more fiduciary markers embedded in the tray, a leveling device, and one or more bite stops;
a virtual endodontic treatment plan including a scan of the scanning appliance and at least one access path to a root canal; and
an aiming device arranged to provide a starting point to a canal orifice in an axial plane and elongate each of those starting points as lines in X and Y-slice angles to form the access path,
the bite stops arranged to ensure maintenance of adequate bite registration or impression material between opposing teeth.

### Claim 7 (depends on 6)

A system according to claim 6 wherein the three or more fiduciary markers are located on an inside or outside surface of the tray.

### Claim 8 (depends on 6)

A system according to claim 6 wherein each fiduciary marker, the leveling device, and the one or more bite stops do not artifact or appear on a scanned image.

### Claim 9 (depends on 6)

A system according to claim 6 wherein the leveling device is a bubble.