Patent US5284443A successfully refreshed from Google Patents.
US5284443A
Expired / Lapsed
US
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Method of forming dental restorations
Assignee: Coltene Whaledent Inc
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Filing: 1992-08-28
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Granted: 1994-02-08
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Expires: 2012-08-28
Abstract
Abstract A canal in a tooth is reinforced by forming a lining within the canal. The canal is reamed to a desired size and depth. A light transmitting mandrel is next inserted into the canal and seated in the reamed-out area. A light curable composite is placed around the mandrel. Alternatively, the mandrel is withdrawn, the canal is filled with a light curable composite, and the mandrel is reinserted through the composite into the canal. Thereafter, light is shined on the mandrel to cure the composite. When cured, the mandrel is withdrawn to expose a precise canal in the composite lining.
Inventors
- 👤 Eberhard Weil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:16
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/225; A61C13/30; A61C5/00; A61C5/50; A61C19/00; A61C19/003
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
89 words
A method of forming a lining in the canal of a tooth stub, the method comprising the steps of: reaming the canal to a desired size and depth; positioning a mandrel in the canal with the lower end of the mandrel in the reamed out section of the canal; the mandrel being made of a light transmitting material; filling the canal in the tooth stub around the mandrel with a light curable composite; and shining light on the mandrel to cause the composite to cure to form a lining.
Claim 2
Independent Claim
89 words
A method of forming a lining in the canal of a tooth stub, the method comprising the steps of: reaming the canal to a desired size and depth; positioning a mandrel in the canal with the lower end of the mandrel in the reamed out section of the canal; the mandrel being made of a light transmitting material; filling the canal in the tooth stub around the mandrel with a light curable composite; and shining light on the mandrel to cause the composite to cure to form a lining.
Claim 3
Dependent Claim
26 words
A method as in claim 1, further including the step of removing the mandrel from the composite to expose a precise canal in the composite lining.
Claim 4
Dependent Claim
19 words
A method as in claim 2, further including the step of forming indentations in the exposed precise canal wall.
Claim 5
Dependent Claim
24 words
A method as in claim 2, wherein said mandrel is made of a material preventing a strong bond between the mandrel and the composite.
Claim 6
Dependent Claim
24 words
A method as in claim 2, wherein said mandrel is provided with a coating preventing a strong bond between the mandrel and the composite.
Claim 7
Independent Claim
73 words
A method of forming a lining in the canal of a tooth stub, the method comprising the steps of: reaming the canal to a desired size and depth; filling the canal in the tooth stub with a light curable composite; inserting a mandrel into the canal through the composite, the mandrel being made of a light transmitting material; shining light on the mandrel to cause the composite to cure to form a lining.
Claim 8
Independent Claim
73 words
A method of forming a lining in the canal of a tooth stub, the method comprising the steps of: reaming the canal to a desired size and depth; filling the canal in the tooth stub with a light curable composite; inserting a mandrel into the canal through the composite, the mandrel being made of a light transmitting material; shining light on the mandrel to cause the composite to cure to form a lining.
Claim 9
Dependent Claim
26 words
A method as in claim 6, further including the step of removing the mandrel from the composite to expose a precise canal in the composite lining.
Claim 10
Dependent Claim
19 words
A method as in claim 7, further including the step of forming indentations in the exposed precise canal wall.
Claim 11
Dependent Claim
24 words
A method as in claim 7, wherein said mandrel is made of a material preventing a strong bond between the mandrel and the composite.
Claim 12
Dependent Claim
24 words
A method as in claim 9, wherein said mandrel is provided with a coating preventing a strong bond between the mandrel and the composite.
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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) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |