CA1069355A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Dental dowel pin unit and method using same
Assignee: Individual
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Filing: 1977-01-21
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Granted: 1980-01-08
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Expires: 1997-01-21
Abstract
Abstract ABSTRACT OF THE DISCLOSURE This invention provides an improved dental dowel pin unit in which a dowel pin to be embedded in a tooth die is encased in a jacket and provided with a flat planar floater designed to rest on the surface of the die stone material. The jacket portion embedded in the base material provides a tough resilient socket in which the dowel pin can be re-inserted and removed repeatedly for maintaining a precise positioning of the die. The apparatus provides an improved method for preparing die models.
Inventors
- 👤 Robert Diez D'aux
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-24 08:19
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A dental dowel pin unit for use in dental models having a tooth die portion and a base portion, said unit comprising: - a pin having an elongated configuration adapted to have one end thereof fixedly embedded in said tooth die material and the other end thereof adapted to be removably embedded in said base material; - a jacket encasing said pin substantially throughout its length; - at least one end of said pin unit being adapted to allow withdrawal of said pin from said jacket and replacement therein.
Claim 2
Dependent Claim
89 words
A dental dowel pin unit for use in dental models having a tooth die portion and a base portion, said unit comprising: - a pin having an elongated configuration adapted to have one end thereof fixedly embedded in said tooth die material and the other end thereof adapted to be removably embedded in said base material; - a jacket encasing said pin substantially throughout its length; - at least one end of said pin unit being adapted to allow withdrawal of said pin from said jacket and replacement therein.
Claim 3
Dependent Claim
29 words
A dental dowel pin unit as claimed in claim 1 and having a floater, said floater comprising a flat planar member extending outwardly from said jacket intermediate said ends.
Claim 4
Dependent Claim
47 words
A dental dowel pin unit as claimed in claim 2 in which said jacket has a series of ridges on the outer surface thereof adapted to structurally bond said jacket to said die stone material and said base material in which it is adapted to be embedded.
Claim 5
Dependent Claim
28 words
A dental dowel pin unit as claimed in claim 3 including ball and socket means releasably engaging said pin with said jacket at the base end portions thereof.
Claim 6
Dependent Claim
27 words
A dental dowel pin unit as claimed in claim 4 including notch and lug means engaging said pin with said jacket at the tooth die end thereof.
Claim 7
Dependent Claim
37 words
A dental dowel pin unit as claimed in claim 5 in which the cross-sectional area of said pin and the interior of said jacket are asymmetrical to permit only one orientation of said pin in said jacket.
Claim 8
Dependent Claim
28 words
A dental dowel pin unit as claimed in claim 6 in which said pin has at the die stone end thereof a dove-tailed anchor engaging said die stone.
Claim 9
Dependent Claim
43 words
A dental dowel pin unit as claimed in claim 7 in which said floater is adapted to engage firmly with said die stone material by anchor means extending from the underside of said floater and adapted to be embedded in said die stone.
Claim 10
Independent Claim
200 words
A method of preparing a dental model with tooth dies from an impression comprising the steps of: - filling said impression with die stone material; - placing in said die stone one end of a dental dowel pin unit adapted to be embedded therein; said dowel pin unit comprising a pin substantially surrounded throughout its length with a jacket and having a flat planar floater extending outward from said jacket intermediate its ends, so that said pin is co-axial with said tooth impression and said floater rests at the surface of said die stone material; - allowing said die stone material to harden; - providing means for separating said jacket immediately above the level of said floater; - preparing said surface of said die stone for non-adhesion to base material; - pouring a base material over said die stone material to surround the other end of said pin unit; - allowing said base material to harden; - cutting said die stone transversely on each side of said tooth die; - removing said tooth die by separating said die stone from said base and disengaging the end of said pin from the portion of said jacket embedded in said base material.
Claim 11
Independent Claim
200 words
A method of preparing a dental model with tooth dies from an impression comprising the steps of: - filling said impression with die stone material; - placing in said die stone one end of a dental dowel pin unit adapted to be embedded therein; said dowel pin unit comprising a pin substantially surrounded throughout its length with a jacket and having a flat planar floater extending outward from said jacket intermediate its ends, so that said pin is co-axial with said tooth impression and said floater rests at the surface of said die stone material; - allowing said die stone material to harden; - providing means for separating said jacket immediately above the level of said floater; - preparing said surface of said die stone for non-adhesion to base material; - pouring a base material over said die stone material to surround the other end of said pin unit; - allowing said base material to harden; - cutting said die stone transversely on each side of said tooth die; - removing said tooth die by separating said die stone from said base and disengaging the end of said pin from the portion of said jacket embedded in said base material.
References Cited (Backward Citations)
No citation records indexed.
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