US5085586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for installing a post in a tooth having an existing endodontic obturator therein
Assignee: Dentsply Sirona Inc
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Filing: 1990-08-28
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Granted: 1992-02-04
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Expires: 2010-08-28
Abstract
Abstract Method of installing a post in a tooth having a metal obturator therein including the steps of drilling a borehole in the tooth with a tubular burr having a tubular opening therein of internal diameter at least slightly greater than the diameter of the obturator to thereby provide a borehole of selected internal diameter having the metal obturator remaining essentially therein, the obturator serving to assist in the guiding of the burr and inserting a tubular post into the borehole, the post receiving the metal obturator therein, the post extending partially above the top of the tooth for attachment of a crown or the like.
Inventors
- 👤 William B. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/02; A61C13/00; A61C13/225; A61C13/30
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
86 words
A method of installing a post in a tooth having a metal obturator therein comprising: drilling a borehole in the tooth with a tubular burr having a tubular opening therein of internal diameter at least slightly greater than the diameter of the obturator to thereby provide a borehole of selected internal diameter and having the metal obturator remaining centrally therein, the obturator serving to assist in guiding the tubular burr; and inserting a tubular post into the drilled borehole, the post receiving the metal obturator therein.
Claim 2
Independent Claim
86 words
A method of installing a post in a tooth having a metal obturator therein comprising: drilling a borehole in the tooth with a tubular burr having a tubular opening therein of internal diameter at least slightly greater than the diameter of the obturator to thereby provide a borehole of selected internal diameter and having the metal obturator remaining centrally therein, the obturator serving to assist in guiding the tubular burr; and inserting a tubular post into the drilled borehole, the post receiving the metal obturator therein.
Claim 3
Dependent Claim
117 words
The method of installing a post in a tooth having a metal obturator therein according to claim 1 wherein said step of drilling a borehole in the tooth includes drilling the hole with an elongated burr member having a cylindrical external configuration and having a distal and a proximal end, the burr being tubular at least in the portion thereof adjacent and encompassing said distal end providing a tubular opening, said distal end having cutting teeth formed theron, and said proximal end being configured to be received in a dental drill for the rotation of said burr member, the internal diameter of the tubular portion being at least slightly greater than the diameter of the metal obturator.
Claim 4
Dependent Claim
54 words
The method of installing a post in a tooth having a metal obturator therein according to claim 2 wherein said step of drilling a borehole in the tooth includes drilling the hole with a burr wherein said burr member has at least one lateral passageway therein adjacent to and spaced from said cutting teeth.
Claim 5
Dependent Claim
56 words
The method of installing a post in a tooth having a metal obturator therein according to claim 3 wherein said step of drilling a borehole in the tooth includes drilling the hole with a burr having a flat area formed on said burr member external cylindrical surface, said flat area penetrating the member internal tubular opening.
Claim 6
Dependent Claim
52 words
The method of installing a post in a tooth having a metal obturator therein according to claim 2 wherein said step of drilling a borehole in the tooth includes drilling the hole with a burr wherein said burr member has opposed lateral passageways therein adjacent to and spaced from said cutting teeth.
Claim 7
Dependent Claim
60 words
The method of installing a post in a tooth having a metal obturator therein according to claim 5 wherein said step of drilling a borehole in the tooth includes drilling the hole with a burr wherein said lateral passageway is formed by flat areas formed on the member external cylindrical surface, said flat area penetrating the member internal tubular opening.
Claim 8
Dependent Claim
61 words
The method of installing a post in a tooth having a metal obturator therein according to claim 2 wherein said step of drilling a borehole in the tooth includes drilling the borehole with a burr wherein the external diameter of the portion of the burr adjacent said proximal end is greater than the diameter of said portion having said tubular opening.
Claim 9
Dependent Claim
87 words
The method of installing a post in a tooth having a metal obturator therein according to claim 2 wherein said step of drilling a borehole in the tooth includes drilling the borehole with a burr wherein said burr member tubular opening extends from said distal end and terminates at a point intermediate said burr member distal and proximal ends, and including at least one radial opening in said burr member communicating said tubular opening with said burr member external cylindrical surface adjacent said tubular opening termination point.
Claim 10
Dependent Claim
110 words
The method of installing a post in a tooth having a metal obturator therein according to claim 1 wherein the step of inserting a tubular post into the drilled borehole includes inserting a post having the form of an elongated tubular member having a generally cylindrical external surface, having an internal tubular surface, having a proximal end and a distal end and having elongated slots therein each in a plane of the tubular member axis and communicating with said distal end, said external surface adjacent said proximal end having at least one circumferential recess therein and said external surface adjacent said distal end having at least one circumferential groove therein.
Claim 11
Dependent Claim
80 words
The method of installing a post in a tooth having a metal obturator therein according to claim 9 wherein the step of inserting a tubular post into the drilled borehole includes inserting a post having the form wherein said external surface adjacent said distal end has at least one groove, such groove having an inclined wall surface configured to permit insertion of the post in a borehole in a tooth but which resists extraction of the post from a borehole.
Claim 12
Dependent Claim
58 words
The method of installing a post in a tooth having a metal obturator therein according to claim 9 wherein the step of inserting a tubular post into the drilled borehole includes inserting a post including at least one lateral opening communicating said interior and exterior surface, such lateral opening being adjacent to and spaced from said proximal end.
Claim 13
Dependent Claim
41 words
The method of installing a post in a tooth having a metal obturator therein according to claim 9 wherein the step of inserting a tubular post into the drilled borehole includes inserting a post including a slot in said proximal end.
Claim 14
Dependent Claim
62 words
The method of installing a post in a tooth having a metal obturator therein according to claim 9 wherein the step of inserting a tubular post into the drilled borehole includes inserting a post wherein said elongated slots at said distal end are dimensioned to permit such slots to deflect inwardly as the post is installed in a borehole in a tooth.
Claim 15
Dependent Claim
125 words
A dental burr for use in preparing a borehole in a tooth to permit the tooth to receive a post implant in the borehole, the burr comprising: an elongated burr member having a cylindrical external configuration and having a distal and a proximal end, the burr being tubular at least in the portion thereof adjacent and encompassing said distal end providing a tubular opening distal end having cutting teeth formed thereon, and the proximal end being configured to be received in a dental drill for the rotation of the burr member, and having opposed flat areas formed on the member external cylindrical surface adjacent to said distal end, the flat areas penetrating the member external cylindrical surface and thereby providing opposed openings in said member.
Claim 16
Dependent Claim
125 words
A dental burr for use in preparing a borehole in a tooth to permit the tooth to receive a post implant in the borehole, the burr comprising: an elongated burr member having a cylindrical external configuration and having a distal and a proximal end, the burr being tubular at least in the portion thereof adjacent and encompassing said distal end providing a tubular opening distal end having cutting teeth formed thereon, and the proximal end being configured to be received in a dental drill for the rotation of the burr member, and having opposed flat areas formed on the member external cylindrical surface adjacent to said distal end, the flat areas penetrating the member external cylindrical surface and thereby providing opposed openings in said member.
Claim 17
Dependent Claim
40 words
A dental burr according to claim 14 wherein the portion thereof immediately adjacent said distal end, which portion includes said cutting teeth, is of slightly increased external diameter compared to the diameter of said portion having said opposed openings therein.
Claim 18
Dependent Claim
30 words
A dental burr according to claim 14 wherein the external diameter of the portion adjacent said proximal end is greater than the diameter of said portion having said tubular opening.
Claim 19
Dependent Claim
59 words
A dental burr according to claim 14 wherein said burr member tubular opening extends from said distal end and terminates at a point intermediate said burr member distal and proximal ends, and including at least one radial opening in said burr member communicating said tubular opening with said burr member external cylindrical surface adjacent said tubular opening termination point.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |