Patent US3675328A successfully refreshed from Google Patents.
US3675328A
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US
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Dental anchor
Assignee: IPCO Corp
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Filing: 1970-12-21
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Granted: 1972-07-11
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Expires: 1990-12-21
Abstract
Abstract A dental anchor comprising an elongate member for anchoring a superstructure to a tooth. The elongate member includes at least two longitudinally spaced weakened portions which are defined by respective reduced thicknesses therein. Furthermore, the elongate member is provided with anchoring means or threaded portions spaced from one another by at least one of the weakened portions of reduced thickness. There is also provided a manipulating head which is spaced from one of the threaded portions by the other of the weakened portions of reduced thickness. The weakened portion of reduced thickness most remote from the manipulating head is of greater reduced thickness i.e., of lesser diameter than that of a weakened portion of reduced thickness most proximate the manipulating head. As a result, when the elongate member is inserted into a channel formed in the tooth, the threaded portion most remote from the manipulating head, severs automatically without overstressing the tooth thereby leaving the threaded portion most proximate the manipulating head in tact with the latter so that the latter threaded portion can be immediately inserted into a successive channel in the tooth without reloading the dental tool.
Inventors
- 👤 Bernard Weissman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:19
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/30; A61C5/35
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
171 words
A dental anchor for insertion into a channel in a tooth, said dental anchor comprising an elongated body, said elongated body including weakened areas of reduced thicknesses to define spaced first and second fracture portions, first anchoring means disposed between said first fracture portion and one end of said elongated body, second anchoring means disposed between said first and second fracture portions, manipulating means disposed at an opposite end of said elongated body, said manipulating means including opposing faces terminating in a marginal edge, said manipulating means being spaced from said second anchoring means by said second fracture portion, said first fracture portion being of greater reduced thickness than any portion of said elongated body disposed between said first fracture portion and said manipulating means which includes said second fracture portion to provide said first fracture portion with a greater tendency to fracture than said second fracture portion, whereby said first anchoring means upon being seated in the tooth channel severs from said second anchoring means at said first fracture portion.
Claim 2
Dependent Claim
171 words
A dental anchor for insertion into a channel in a tooth, said dental anchor comprising an elongated body, said elongated body including weakened areas of reduced thicknesses to define spaced first and second fracture portions, first anchoring means disposed between said first fracture portion and one end of said elongated body, second anchoring means disposed between said first and second fracture portions, manipulating means disposed at an opposite end of said elongated body, said manipulating means including opposing faces terminating in a marginal edge, said manipulating means being spaced from said second anchoring means by said second fracture portion, said first fracture portion being of greater reduced thickness than any portion of said elongated body disposed between said first fracture portion and said manipulating means which includes said second fracture portion to provide said first fracture portion with a greater tendency to fracture than said second fracture portion, whereby said first anchoring means upon being seated in the tooth channel severs from said second anchoring means at said first fracture portion.
Claim 3
Dependent Claim
17 words
A dental anchor as claimed in claim 1, wherein said elongated body is a generally cylindrical rod.
Claim 4
Dependent Claim
23 words
A dental anchor as claimed in claim 1, wherein said anchoring means are constituted by threaded outer surfaces provided on said elongated body.
Claim 5
Dependent Claim
32 words
A dental anchor as claimed in claim 1, wherein said manipulating means includes guide means and torque transferring means for inducing torque in said elongated body through intermediary of said guide means.
Claim 6
Dependent Claim
48 words
A dental anchor as claimed in claim 4, wherein said guide means is constituted by a smooth cylindrical surface, and said torque transferring means is constituted by an extreme end portion including said opposing faces to define two laterally opposite flat surfaces extending from said smooth cylindrical surface.
Claim 7
Dependent Claim
29 words
A dental anchor as claimed in claim 5, wherein said extreme end portion is of laterally reduced thickness and of laterally increased width transversely of said laterally reduced thickness.
Claim 8
Dependent Claim
109 words
A dental anchor as claimed in claim 5, in combination with a dental attachment, said dental attachment comprising means for operative association with a power tool, and control means for operative association with said manipulating means, said control means including a pair of longitudinally extending extreme end limbs laterally spaced from one another, said extreme end limbs having mutually opposing partially cylindrical inner surfaces respectively for cooperatively receiving the smooth cylindrical surface of said guide means, said extreme end limbs further having mutually opposing flat inner surfaces laterally extending from said partially cyLindrical surfaces thereof for receiving and applying torque against the flat surfaces of said torque transferring means.
Claim 9
Dependent Claim
44 words
The combination as claimed in claim 7, wherein said extreme end limbs are spaced from one another over a longitudinal length which is less than the longitudinal length of said manipulating means such that the latter protrudes partially when fully seated in said attachment.
Claim 10
Dependent Claim
30 words
A dental anchor as claimed in claim 1, wherein said first and second fracture portions of said elongated body are constituted by peripherally extending reduced thicknesses in said elongated body.
References Cited (Backward Citations)
US2289785A
Cited
US3434209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |