US4526539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Palatal retention device
Assignee: MEDICAL MAGNETICS Inc 79 NORTH FRANKLIN TURNPIKE RAMSEY NJ 07446 A CORP OF NJ
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Filing: 1984-02-29
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Granted: 1985-07-02
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Expires: 2004-02-29
Abstract
Abstract A palatal body is custom configured and dimensioned to fit within the oral cavity with an outer edge conforming to and engaging the lingual faces of the teeth of the maxillary arch. The dimensions are chosen to retain the arch either in an expanded condition associated with separation of the mid-palatal suture, or in some other predetermined position following suitable prior treatment of a cleft palate patient. A plurality of diametrally or longitudinally polarized cylindrical magnets are arrayed in parallel and in parallel to the palate body, all oriented with their axes in the bucco-lingual direction, and individually mounted for rotation under the influence of intraoral activity for inducing therapeutic levels of voltage and current in the adjacent bone structure of the natural palate on either side of the palatal gap.
Inventors
- 👤 Abraham Blechman
- 👤 Eugene A. Pescatore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:54
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
112 words
An orthodontic device for inhibiting lingual movement of a maxillary arch bordering a natural palate with a gap therein while promoting osteogenesis to close said palatal gap, comprising a palate body having an outer edge contiguous to and in general conformance with the lingual contouring of the teeth of said maxillary arch, and a plurality of permanent magnets carried by said palate body, said magnets being movable relative to one another and subject to intra-oral lingual activity for developing a fluctuable magnetic flux field adapted to induce mild electric currents in the bone structure of the natural palate on either side of said gap sufficient to promote osteogenesis to close said gap.
Claim 2
Dependent Claim
112 words
An orthodontic device for inhibiting lingual movement of a maxillary arch bordering a natural palate with a gap therein while promoting osteogenesis to close said palatal gap, comprising a palate body having an outer edge contiguous to and in general conformance with the lingual contouring of the teeth of said maxillary arch, and a plurality of permanent magnets carried by said palate body, said magnets being movable relative to one another and subject to intra-oral lingual activity for developing a fluctuable magnetic flux field adapted to induce mild electric currents in the bone structure of the natural palate on either side of said gap sufficient to promote osteogenesis to close said gap.
Claim 3
Dependent Claim
57 words
The orthodontic device of claim 1, in which said permanent magnets each have a circular cylindrical body of magnetic material polarized in the diametral direction, said body being encased in a biocompatible material, and said encased magnet being mounted substantially parallel to said palate body by means enabling rotation about the longitudinal axis of said cylindrical body.
Claim 4
Dependent Claim
20 words
The orthodontic device of claim 2, in which said permanent magnets are arrayed with their longitudinal axes generally in parallel.
Claim 5
Dependent Claim
32 words
The orthodontic device of claim 3, in which said permanent magnets are each journalled at their respective ends in corresponding supports on opposite sides of said palate body in the bucco-lingual direction.
Claim 6
Dependent Claim
24 words
The orthodontic device of claim 2, in which said permanent magnets are journalled at their respective ends in corresponding supports on said palate body.
Claim 7
Dependent Claim
40 words
The orthodontic device of claim 1, in which a plurality of orthodontic wires are embedded in said palate body and are exposed along at least part of said outer edge for positive anchorage to corresponding teeth of the maxillary arch.
Claim 8
Dependent Claim
21 words
The orthodontic device of claim 1, in which said palate body includes means for outer-edge anchorage to molar and/or premolar teeth.
Claim 9
Dependent Claim
35 words
The orthodontic device of claim 1, in which said permanent magnets each have a circular cylindrical body including internal magnetic material and at least an outer layer of a biocompatible material on all exposed surfaces.
Claim 10
Dependent Claim
29 words
The orthodontic device of claim 8, in which said permanent magnets are mounted on said palate body by means enabling rotation about the longitudinal axis of said cylindrical body.
Claim 11
Dependent Claim
24 words
The orthodontic device of claim 1, in which said permanent magnets are all mounted with their respective dipoles in parallel to a common plane.
References Cited (Backward Citations)
US2732621A
Cited
US3259129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |