US3835538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthodontic onlay and method for exerting corrective traction on an impacted tooth
Assignee: Individual
•
Filing: 1972-05-08
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Granted: 1974-09-17
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Expires: 1992-05-08
Abstract
Abstract An orthodontic onlay which is cemented directly to an impacted tooth to aid in exerting corrective traction thereon. A curved base surface has a curvature substantially the same as an incisal portion of the tooth involved. The onlay has a series of openings or recesses leading from that surface toward the opposite surface for receiving and holding cement, thereby increasing the bond between the tooth and the onlay when the cement is applied. Bonding strength is increased further by plasma processing the surface, especially when the onlay is made from plastic. On its opposite surface the onlay has means for attaching a ligature.
Inventors
- 👤 M Northcutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:59
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
142 words
An orthodontic onlay adapted to be cemented to an impacted tooth to aid in exerting corrective traction thereon, comprising a curved base surface having a curvature essentially the same as that of a lower portion of such a tooth and having a lower edge of a configuration that conforms essentially to the profile of the lower edge of the tooth, a series of openings leading from said surface toward the opposite surface, for receiving and holding cement and thereby increasing the bond between the tooth and the onlay when cement is placed thereon and anchor means consisting of a single closed loop on said opposite surface for attaching a ligature thereto, whereby the anchor means may be attached to an exposed portion of an impacted tooth, a ligature may be attached to said loop and corrective forces applied to the impacted tooth.
Claim 2
Dependent Claim
142 words
An orthodontic onlay adapted to be cemented to an impacted tooth to aid in exerting corrective traction thereon, comprising a curved base surface having a curvature essentially the same as that of a lower portion of such a tooth and having a lower edge of a configuration that conforms essentially to the profile of the lower edge of the tooth, a series of openings leading from said surface toward the opposite surface, for receiving and holding cement and thereby increasing the bond between the tooth and the onlay when cement is placed thereon and anchor means consisting of a single closed loop on said opposite surface for attaching a ligature thereto, whereby the anchor means may be attached to an exposed portion of an impacted tooth, a ligature may be attached to said loop and corrective forces applied to the impacted tooth.
Claim 3
Dependent Claim
22 words
The onlay of claim 1 wherein said base surface corresponds in shape and size to the lower front surface of The tooth.
Claim 4
Dependent Claim
22 words
The onlay of claim 1 wherein said base surface corresponds in shape and size to the lower rear surface of the tooth.
Claim 5
Dependent Claim
26 words
The onlay of claim 1 which is cap shaped and is shaped and sized to inclose both front, rear, and bottom edge surfaces of the tooth.
Claim 6
Dependent Claim
14 words
The onlay of claim 1 wherein said anchor means comprises an integral plastic ring.
Claim 7
Dependent Claim
20 words
The onlay of claim 1 wherein said anchor means comprises a separate metal member held to said onlay by grommets.
Claim 8
Dependent Claim
18 words
The onlay of claim 1 wherein said onlay is plastic and is substantially the color of the tooth.
Claim 9
Dependent Claim
20 words
The onlay of claim 7 wherein said base surface is a surface that has been plasma treated to enhance adhesion.
Claim 10
Dependent Claim
15 words
The onlay of claim 1 wherein said openings go all the way through the bracket.
Claim 11
Dependent Claim
15 words
The onlay of claim 1 wherein said openings extend only part way through the bracket.
Claim 12
Dependent Claim
86 words
The process of exerting corrective traction on an impacted tooth comprising a. exposing a small area of the lower portion of said impacted tooth; b. cementing to said exposed portion an orthodontic onlay having a base surface with openings leading from said surface toward the opposite surface and anchor means on said opposite surface for attaching a ligature thereto; and c. attaching a ligature to said anchor means and applying tension to said ligature whereby said impacted tooth is caused to move toward an erupted position.
Claim 13
Dependent Claim
86 words
The process of exerting corrective traction on an impacted tooth comprising a. exposing a small area of the lower portion of said impacted tooth; b. cementing to said exposed portion an orthodontic onlay having a base surface with openings leading from said surface toward the opposite surface and anchor means on said opposite surface for attaching a ligature thereto; and c. attaching a ligature to said anchor means and applying tension to said ligature whereby said impacted tooth is caused to move toward an erupted position.
Claim 14
Dependent Claim
13 words
The process of claim 11 wherein said onlay is made from tooth-colored plastic.
Claim 15
Dependent Claim
15 words
The process of claim 12 wherein said onlay base surface is a plasma pretreated surface.
Claim 16
Dependent Claim
15 words
The process of claim 12 wherein said anchor means is integral with the onlay plastic.
Claim 17
Dependent Claim
15 words
The process of claim 12 wherein said anchor means is metal secured to the plastic.
Claim 18
Dependent Claim
16 words
The process of claim 11 wherein said onlay openings go all the way through the onlay.
Claim 19
Dependent Claim
12 words
The process of claim 11 wherein said onlay openings are blind recesses.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |