Method for removal of dental cement
CA 2398907 C · Owner: Dentsply International Inc. · Inventors: Jefferies, Steven R.; Pameijer, Cornelis; Fortin, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method of restoring a tooth, the present invention provides a technique for the removal of cement after bonding a dental construct to a tooth. The effect of 5 cement removal techniques were determined by means of an in vitro study, using extracted human teeth. The best results in terms of leakage scores and interface contour were obtained by the technique disclosed comprising the following steps: after placement of the construct on the tooth removing excess cement with a soft, pointed brush brushing the dental margins , with a photocurable dental resin cement which is the same as or different from the dental cement used to bond the construct to the tooth; and light curing , the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 8, 2001 and granted July 5, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.