US4685969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and separating substance for removing a cavity-polymerized inlay consisting of a dental filling composite
Assignee: Coltene Holding AG
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Filing: 1985-11-26
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Granted: 1987-08-11
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Expires: 2005-11-26
Abstract
Abstract Process for separating a pre-polymerized composite dental filling, such as an inlay, from the hard substance of the tooth using a separating substance consisting of a sol formed from a substance swollen and dissolved in alcohol and forming an organic or inorganic gel. The separating substance is applied as a separating layer to the cavity prior to introducing the composite into the cavity and this facilitates the removal of the composite after hardening in the cavity. The separating layer is removed from the cavity, and the inlay is then cemented into the cavity after being tempered.
Inventors
- 👤 Adalbert Schmid
- 👤 Alfons Kiener
- 👤 Stephan Kagi
- 👤 Jean P. Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:14
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
114 words
A process for filling a tooth cavity with a composite dental filling, said process comprising the steps of: preparing the tooth cavity; introducing a separating substance into said cavity to form a separating layer in said cavity, said separating substance decomposing at body temperature into a sol; introducing a dental filling composite into said cavity; partly hardening said composite in said cavity and roughly fitting said composite in said cavity to form a partly hardened filling; removing said partly hardened filling from said cavity; completing the hardening of the partly hardened filling to form a completely hardened filling; removing said separating layer from said cavity; and bonding said completely hardened filling in said cavity.
Claim 2
Dependent Claim
114 words
A process for filling a tooth cavity with a composite dental filling, said process comprising the steps of: preparing the tooth cavity; introducing a separating substance into said cavity to form a separating layer in said cavity, said separating substance decomposing at body temperature into a sol; introducing a dental filling composite into said cavity; partly hardening said composite in said cavity and roughly fitting said composite in said cavity to form a partly hardened filling; removing said partly hardened filling from said cavity; completing the hardening of the partly hardened filling to form a completely hardened filling; removing said separating layer from said cavity; and bonding said completely hardened filling in said cavity.
Claim 3
Dependent Claim
19 words
A process according to claim 1, wherein a female mold is fastened to the cavity to shape the tooth.
Claim 4
Dependent Claim
14 words
A process according to claim 1, wherein said composite is a light-hardening hybrid composite.
Claim 5
Dependent Claim
27 words
A separating substance for use in the process as claimed in claim 1, said separating substance comprising a solution which decomposes into a sol at body temperature.
Claim 6
Dependent Claim
19 words
A separating substance according to claim 4, wherein the sol consists of a gel-forming component and a hydrophilic solution.
Claim 7
Dependent Claim
14 words
A separating substance according to claim 5, wherein said hydrophilic solution is an alcohol.
Claim 8
Dependent Claim
13 words
A separating substance according to claim 6, wherein said alcohol is ethyl alcohol.
Claim 9
Dependent Claim
16 words
A separating substance according to claim 5, wherein said gel-forming component is an organic swelling means.
Claim 10
Dependent Claim
14 words
A separating substance according to claim 8, wherein the organic swelling means is agar.
Claim 11
Dependent Claim
28 words
A separating substance according to claim 9, wherein the agar is present in a 1:1 alcohol water mixture in an amount of about 0.5 to 5% by weight.
Claim 12
Dependent Claim
16 words
A separating substance according to claim 5, wherein the gel-forming component is an inorganic swelling means.
Claim 13
Dependent Claim
15 words
A separating substance according to claim 11, wherein the inorganic swelling means is aluminum hydroxide.
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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |