# US 9,872,742 B1 · Orthodontic hand instrument

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- Number: US 9,872,742 B1
- Document ID: US9872742B1
- Status: Granted
- Kind: B1
- Application number: 15/384,177
- Filed: 2016-12-19
- Granted: 2018-01-23
- Earliest claimed: 2016-12-19
- Assignees: King Saud University
- Applicants: King Saud University
- Inventors: Sahar Faisal Albarakati; Bader Khalid Albalkhi
- Web page: https://patentgrep.com/patent/US9872742B1

## CPC

- A61C 7/02: Tools for manipulating or working with an orthodontic appliance {(tools for placement of brackets A61C7/146; instruments for attaching elastic bands A61C7/306)}
- A61C 7/026: {for twisting orthodontic ligature wires}
- 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

The orthodontic hand instrument includes a handle portion having a first end and an opposing second end, as well as a first shaft extending outward from the first end and a second shaft extending outward from the second end, each shaft having a working end. The working end of each shaft includes a stoop having a gingival head and an occlusal head, and a vertical slot extending between the gingival head and the occlusal head. Both the gingival head and the occlusal head of the stoop of each working end have a rectangular shape. The handle portion may have a knurled surface or other suitable griping surface for preventing the hand instrument from slipping out of the orthodontist's hand. Further, each shaft can include a tapered portion adjacent to the corresponding working end.

## Claims

### Claim 1

An orthodontic hand instrument configured for making distal cinch back bends on dental arch wires, comprising:
a handle portion having a first end and an opposing second end;
a first shaft extending from the first end of the handle portion, the first shaft having a tapered distal end;
a first stoop extending from the tapered distal end of the first shaft, the first stoop having a bifurcated head portion defining a rectangularly-shaped gingival head having a length of about 1 mm, a height of about 1 mm and a width of about 2 mm, a rectangularly-shaped occlusal head having a length of about 1 mm, a height of about 1 mm and a width of about 2 mm overlying and projecting beyond the gingival head, and a 1 mm vertical slot between the gingival head and the occlusal head, the slot being dimensioned and configured for engaging an arch wire of a dental appliance;
a second shaft extending from the second end of the handle portion, the second shaft having a tapered distal end; and
a second stoop extending from the tapered distal end of the second shaft, the second stoop having a bifurcated head portion defining a rectangularly-shaped gingival head having a length of about 1 mm, a height of about 1 mm and a width of about 2 mm, a rectangularly-shaped occlusal head having a length of about 1 mm, a height of about 1 mm and a width of about 2 mm overlying and projecting beyond the gingival head, and a 1 mm vertical slot between the gingival head and the occlusal head, the slot being dimensioned and configured for engaging an arch wire of a dental appliance, the second stoop being a mirror image of the first stoop.

### Claim 2 (depends on 1)

The orthodontic hand instrument according to claim 1, wherein the handle portion includes at least one knurled surface configured for enhancing an orthodontist's grip on the handle.

### Claim 3 (depends on 1)

The orthodontic hand instrument according to claim 1, wherein the handle portion has a length of about 10 cm and a diameter of about 5 mm.

### Claim 4 (depends on 1)

The orthodontic hand instrument according to claim 1, wherein each said first stoop and said second stoops have bends extending in opposite directions.

### Claim 5 (depends on 1)

The orthodontic hand instrument according to claim 1, wherein the instrument is made from stainless steel.

### Claim 6 (depends on 1)

The orthodontic hand instrument according to claim 1, wherein the instrument is made from a nickel-titanium alloy.