US3827146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthodontic coil and retaining device utilizing the same
Assignee: Individual
•
Filing: 1972-11-29
•
Granted: 1974-08-06
•
Expires: 1992-11-29
Abstract
Abstract An orthodontic retaining device in the form of a removable partial denture or active orthodontic appliance that cooperates with teeth includes an acrylic member having an external peripheral portion configurated in the general arch-shape of a normal dentition of the teeth. A plurality of coils in the form of springs are at least partially embedded in the acrylic and positioned adjacent to the peripheral portion of the acrylic member. A portion of the spring, which may be of the same or a different pitch than the embedded portion, extends exteriorly of the acrylic member and is provided at its free end with a clasp or rest. The clasp is preferably in the form of a ball clasp or a bar clasp which engages the teeth when the partial denture or appliance is fully positioned interiorly of the arch of the teeth. The rest is so configurated so that it abuts the crown of a tooth and is securely lodged in a groove thereof when the partial denture is positioned lingually or palatally of the arch of the teeth. In each case, the exposed portion of the coil has limited freedom of movement. Turning of the coil about its axis within the acrylic member is limited by an extension at the free end of the embedded portion which defines a pitch other than the pitch of the embedded portion of the coil.
Inventors
- 👤 M Wallshein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:00
CPC Classifications
A; A61; A61C; A61C7/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
181 words
Orthodontic device comprising a removable dental plate adapted to cooperate with a dentition of teeth and having an external peripheral portion configurated in the general archshape of the dentition and having at least one threaded hole in said peripheral portion, said peripheral portion of said dental plate substantially following and being adjacent to the dentition when normally disposed in an operative position relative to the corresponding arch; coil means having an internal portion comprising a plurality of turns threadedly receivable in said threaded hole, whereby said coil means is axially movable in response to rotation thereof about the axis of the same and resulting threaded engagement between said internal portion turns and the internal screw thread formed in said hole, and having an external portion projecting from said dental plate; and engaging means connected to said coil external portion and configurated to releasably engage one tooth of the dentition when said dental plate is disposed in the operative position, whereby said dental plate is maintained in the normal or operative position by the action of said coil means and engaging means.
Claim 2
Dependent Claim
181 words
Orthodontic device comprising a removable dental plate adapted to cooperate with a dentition of teeth and having an external peripheral portion configurated in the general archshape of the dentition and having at least one threaded hole in said peripheral portion, said peripheral portion of said dental plate substantially following and being adjacent to the dentition when normally disposed in an operative position relative to the corresponding arch; coil means having an internal portion comprising a plurality of turns threadedly receivable in said threaded hole, whereby said coil means is axially movable in response to rotation thereof about the axis of the same and resulting threaded engagement between said internal portion turns and the internal screw thread formed in said hole, and having an external portion projecting from said dental plate; and engaging means connected to said coil external portion and configurated to releasably engage one tooth of the dentition when said dental plate is disposed in the operative position, whereby said dental plate is maintained in the normal or operative position by the action of said coil means and engaging means.
Claim 3
Dependent Claim
20 words
Orthodontic retaining device as defined in claim 1, wherein said dental plate is in the form of a partial denture.
Claim 4
Dependent Claim
16 words
Orthodontic retaining device as defined in claim 1, wherein said dental plate is an active appliance.
Claim 5
Dependent Claim
15 words
Orthodontic retaining device as defined in claim 1, wherein said dental plate is substantially flat.
Claim 6
Dependent Claim
20 words
Orthodontic retaining device as defined in claim 1, wherein said internal and external portions comprise turns having the same pitch.
Claim 7
Dependent Claim
19 words
Orthodontic retaining device as defined in claim 1, wherein said internal and external portions comprise turns having different pitch.
Claim 8
Dependent Claim
28 words
Orthodontic retaining device as defined in claim 6, wherein the pitch of the turns of said external portion is greater than the corresponding pitch of said internal portion.
Claim 9
Dependent Claim
16 words
Orthodontic retaining device as defined in claim 1, wherein said engaging means comprises a ball clasp.
Claim 10
Dependent Claim
16 words
Orthodontic retaining device as defined in claim 1, wherein said engaging means comprises a bar clasp.
Claim 11
Dependent Claim
32 words
Orthodontic retaining device as defined in claim 1, wherein said engaging means comprises an extension, and a rest member configurated and arranged to engage a groove in the crown of a tooth.
Claim 12
Dependent Claim
80 words
Orthodontic retaining device as defined in claim 1, wherein said engaging means comprises a wire curved substantially in the form of a U-shape so as to bridge the arch of teeth from the lingual towards the facial side of the mouth, and a clasp at the free end of the wire on the facial side, said wire being so configurated so as to bias said clasp lingually to thereby permit said clasp to penetrate a space between two adjacent teeth.
Claim 13
Dependent Claim
36 words
Orthodontic retaining device as defined in claim 1, wherein said internal portion comprises substantially parallel turns and has a free end portion provided with an extension which extends in a direction other than said parallel direction.
Claim 14
Dependent Claim
45 words
Orthodontic retaining device as defined in claim 12, wherein said dental plate is provided with a screw thread configurated to meshingly receive said parallel turns, said internal portion being prevented from freely turning due to the frictional engagement of said extension with said screw thread.
Claim 15
Dependent Claim
41 words
Orthodontic retaining device as defined in claim 1, wherein said dental plate is provided with cut-out portions in the regions of said periphery where said coil means is supported so that said external portions may flex without interference with said member.
Claim 16
Dependent Claim
64 words
Orthodontic retaining device as defined in claim 1, wherein adjacent teeth form spaces, and wherein said coil means is so positioned along said peripheral portion so that said engaging means is positioned in the region of at least one of the spaces, whereby said engaging means can enter the space and retain said dental plate in position relative to the teeth forming the space.
Claim 17
Dependent Claim
85 words
Orthodontic retaining device as defined in claim 1, wherein at least one of the lower teeth of the dentition has a crown with a groove, and wherein said coil means is so positioned along said peripheral portion so that said engaging means is positioned in the region of at least one groove; said engaging means comprising a rest configurated to abut against the crown as to be securely positioned in the groove, whereby said rest supports said dental plate on the tooth having the groove.
Claim 18
Dependent Claim
16 words
Orthodontic retaining device as defined in claim 1, wherein said dental plate is made from plastic.
Claim 19
Dependent Claim
13 words
Orthodontic retaining device as defined in claim 17, wherein said plastic is acrylic.
References Cited (Backward Citations)
US360695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |