US3765091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthodontic onlay for light-wire technique
Assignee: Individual
•
Filing: 1972-07-31
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Granted: 1973-10-16
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Expires: 1992-07-31
Abstract
Abstract An orthodontic onlay for use with a single arch wire in a lightwire technique. The onlay is an integral plastic member for direct cementing to a tooth. It has a curved base portion whose rear surface conforms to the cheek surface of a tooth and has a series of cement-holding openings leading therefrom. The front surface of this base portion provides a bracket portion having a snap-in notch with a narrow, generally circular seat for an arch wire. An entrance portion of the notch is formed by a pair of facing walls resilient enough so that while the entrance opening is normally substantially smaller in diameter than the arch wire, its walls spread apart when the arch wire is pressed against them, to admit the arch wire to the seat, and the walls then spring back to lock the arch wire in the seat. The onlay also has one or more vertical openings for anchoring control auxiliaries. In one form, notches adjacent the top and bottom of each opening enables tying ligature wires for additional control.
Inventors
- 👤 M Northcutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:36
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
103 words
An orthodontic onlay for use with an arch wire in a lightwire technique comprising a plastic member having a base portion for attachment to a tooth and an outwardly projecting bracket portion with a narrow seat for an arch wire, said bracket portion having a slot deFined by a pair of walls for a snap-in entrance to said seat, said walls defining a slot narrower than said seat so that they may be forced apart by the wire when a wire is inserted or removed, the horizontal width of said bracket at said slot being substantially greater than the width of said seat.
Claim 2
Dependent Claim
103 words
An orthodontic onlay for use with an arch wire in a lightwire technique comprising a plastic member having a base portion for attachment to a tooth and an outwardly projecting bracket portion with a narrow seat for an arch wire, said bracket portion having a slot deFined by a pair of walls for a snap-in entrance to said seat, said walls defining a slot narrower than said seat so that they may be forced apart by the wire when a wire is inserted or removed, the horizontal width of said bracket at said slot being substantially greater than the width of said seat.
Claim 3
Dependent Claim
22 words
The orthodontic onlay of claim 1 wherein the width of said seat is substantially the same as the diameter of the wire.
Claim 4
Dependent Claim
21 words
The orthodontic onlay of claim 1 having at least one vertical opening through said bracket portion for anchoring a control auxiliary.
Claim 5
Dependent Claim
43 words
The orthodontic onlay of claim 3 having a shelf at the top and bottom of said vertical opening and wings on each side of said bracket forward of said shelf and extending vertically therebeyond and separated from each other, for tying ligatures thereto.
Claim 6
Dependent Claim
26 words
The orthodontic onlay of claim 1 wherein said slot comprises an outer portion having converging surfaces leading to two parallel surfaces that lead into said seat.
Claim 7
Dependent Claim
21 words
The orthodontic onlay of claim 1 wherein said bracket portion includes tapered surfaces that converge toward each side of said seat.
Claim 8
Dependent Claim
57 words
The orthodontic onlay of claim 6 wherein the surface on each side of said seat slopes away therefrom in all directions at an angle of about 20*, thereby resulting in imparting a braking force of friction to the arch wire when it enters or leaves the seat in either direction at an angle of the same amount.
Claim 9
Dependent Claim
21 words
The orthodontic onlay of claim 1 wherein said bracket portion diverges laterally from each end of the walls defining said slot.
Claim 10
Dependent Claim
127 words
An orthodontic onlay for use with an arch wire in a light-wire technique comprising a plastic member to be directly cemented to a tooth and having a base portion with a rear surface that conforms substantially to the forward surface of the tooth to which it is to be cemented and a bracket portion with a generally circular narrow seat for an arch wire, said bracket portion having a slot defined by a pair of walls for a snap-in entrance to said seat, said walls defining a slot narrower than said seat so that they may be forced apart by the wire when a wire is inserted or removed, the horizontal width of said bracket at said slot being substantially greater than the width of said seat.
Claim 11
Dependent Claim
127 words
An orthodontic onlay for use with an arch wire in a light-wire technique comprising a plastic member to be directly cemented to a tooth and having a base portion with a rear surface that conforms substantially to the forward surface of the tooth to which it is to be cemented and a bracket portion with a generally circular narrow seat for an arch wire, said bracket portion having a slot defined by a pair of walls for a snap-in entrance to said seat, said walls defining a slot narrower than said seat so that they may be forced apart by the wire when a wire is inserted or removed, the horizontal width of said bracket at said slot being substantially greater than the width of said seat.
Claim 12
Dependent Claim
22 words
The orthodontic onlay of claim 9 wherein the width of said seat is substantially the same as the diameter of the wire.
Claim 13
Dependent Claim
21 words
The orthodontic onlay of claim 9 having at least one vertical opening through said bracket portion for anchoring a control auxiliary.
Claim 14
Dependent Claim
43 words
The orthodontic onlay of claim 11 having a shelf at the top and bottom of said vertical opening and wings on each side of said bracket forward of said shelf and extending vertically therebeyond and separated from each other, for tying ligatures thereto.
Claim 15
Dependent Claim
27 words
The orthodontic onlay of claim 9 wherein said slot comprises an outer portion having converging surfaces leading to two parallel surfaces that lead into said circular seat.
Claim 16
Dependent Claim
21 words
The orthodontic onlay of claim 9 wherein said bracket portion includes tapered surfaces that converge toward each side of said seat.
Claim 17
Dependent Claim
57 words
The orthodontic onlay of claim 14 wherein the surface of each side of said seat slopes away therefrom in all directions at an angle of about 20*, thereby resulting in imparting a braking force of friction to the arch wire when it enters or leaves the seat in either direction at an angle of the same amount.
Claim 18
Dependent Claim
21 words
The orthodontic onlay of claim 9 wherein said bracket portion diverges laterally from each end of the walls defining said slot.
Claim 19
Dependent Claim
12 words
The orthodontic onlay of claim 9 wherein said plastic is clear plastic.
Claim 20
Dependent Claim
12 words
The orthodontic onlay of claim 9 wherein said plastic is tooth color.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |