US4021916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental dowel pin positioner
Assignee: Individual
•
Filing: 1975-08-20
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Granted: 1977-05-10
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Expires: 1995-08-20
Abstract
Abstract A dental appliance for maintaining axis parallelism of dental dowel pins when positioning replicas of teeth taken from impressions in a model of the mouth, which employs a plate, connected pivoting links, or a rail, having a plurality of apertured seats for mounting the dowel pins therein in positions conforming to the configurations of the teeth and for maintaining axis parallelism of the dowel pins, said apertured seats being permanently mounted to each other in predetermined transverse positions, to provide a simplified structure for locating the mounted dowel pins with respect to the impressions of the teeth.
Inventors
- 👤 Robert Spalten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:30
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
In a dental appliance for maintaining axis parallelism of dental dowel pins when positioning replicas of the teeth taken from impressions in a model of the patient's mouth, the combination of dowel pins and a positioning means having a plurality of apertured seats for mounting the dowel pins therethrough in positions conforming to the configuration of the patient's teeth; and apertured means for maintaining axis parallelism of the dowel pins to each other; and means for seating each dowel pin in the longitudinal axis of a replica; said apertured seats being mounted to each other in predetermined transverse relationships to provide a connected unitary structure at all times.
Claim 2
Dependent Claim
108 words
In a dental appliance for maintaining axis parallelism of dental dowel pins when positioning replicas of the teeth taken from impressions in a model of the patient's mouth, the combination of dowel pins and a positioning means having a plurality of apertured seats for mounting the dowel pins therethrough in positions conforming to the configuration of the patient's teeth; and apertured means for maintaining axis parallelism of the dowel pins to each other; and means for seating each dowel pin in the longitudinal axis of a replica; said apertured seats being mounted to each other in predetermined transverse relationships to provide a connected unitary structure at all times.
Claim 3
Dependent Claim
17 words
The dental appliance of claim 1, wherein the positioning means can be shaped into the desired configuration.
Claim 4
Dependent Claim
16 words
The dental appliance of claim 1, wherein the postioning means comprises a plurality of connecting links.
Claim 5
Dependent Claim
20 words
The dental appliance of claim 1, wherein the positioning means and the dowel pins are embedded in a cast material.
Claim 6
Dependent Claim
27 words
In the dental appliance of claim 1 a dowel pin provided with a seat for engaging the positioning means in a predetermined longitudinal position with respect thereto.
Claim 7
Dependent Claim
49 words
The method of employing the dental appliance of claim 1, which comprises the step of inserting a dowel pin into a seat on the positioning means which corresponds to the nearest position of the seat which will support the dowel pin over the tooth impression in the mouth model.
Claim 8
Dependent Claim
29 words
The method of claim 6, in which the positioning means and seated dowel pins are embedded in a layer of hardenable casting material, permanently affixing the positioning means therein.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |