Stock material or miscellaneous articles – Composite – Of silicon containing
Reexamination Certificate
2001-10-12
2003-07-22
Dawson, Robert (Department: 1712)
Stock material or miscellaneous articles
Composite
Of silicon containing
C623S023590, C525S477000, C528S031000, C528S032000
Reexamination Certificate
active
06596403
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to coatings on hard tissue surfaces or surfaces of the oral environment. More specifically, this invention relates to substantive coatings for hard tissue surfaces or surfaces of the oral environment.
BACKGROUND OF THE INVENTION
Plaque is a common factor in caries, gum disease and discoloration of teeth and greatly contributes to their development. Plaque is initiated when cariogenic bacteria adhere to pellicle, a proteinaceous film on the surface of teeth. Plaque, in turn, acts as a nucleus for the formation of calculus. As calculus matures and hardens it tends to stain due to the absorption of dietary chromagens. Additionally, oral restorative materials may be inherently susceptible to build-up of stain from dietary chromagens. It is desirable to have a means to avoid stain absorption and adherence of bacteria to hard tissue and surfaces of the oral environment.
Silicone oils, because of their hydrophobic nature, have been suggested for inclusion in dentrifices to inhibit the staining process. However their adhesion and retention on tooth surfaces is typically quite low.
U.S. Pat. No. 5,078,988 to Lin et al. discloses dentifrices including modified aminoalkyl silicones. The modified silicones are said to form a hydrophobic layer on the teeth for prevention of caries and stain. PCT patent application number WO 91/13608 to Rolla et al. discloses dentifrices comprising a liquid silicone oil and a fat-soluble antibacterial agent, which is described as being useful for protection of teeth against plaque formation due to a slow release of antibacterial agent into the saliva.
U.S. Pat. No. 4,981,903 to Garbe et al. discloses pressure-sensitive or non-pressure sensitive adhesive compositions comprising a vinyl polymeric backbone with grafted pendant siloxane polymeric moieties. These compositions are disclosed to be useful as good topical application binding materials for application in cosmetics and medicaments, and also as sealant compositions for porous materials such as paper and wood. See col. 3, lines 25 through 31. U.S. Pat. No. 4,972,037 to Garbe et al. discloses compositions useful as an adhesive at room temperature which comprise a copolymer having both pendant fluorochemical groups and pendant polysiloxane grafts. These compositions are also useful in topical applications, including the application of cosmetics and medicaments and for sealant compositions for porous materials such as paper and wood. See col. 3, lines 25 through 33. U.S. Pat. No. 4,981,902 to Mitra, et. al. discloses non-pressure-sensitive adhesive acrylate or methacryate polymers having pendant polysiloxane grafts. The polymers comprise monomers having polar functionality, and are described as useful in coating compositions for animal bodies.
U.S. Pat. No. 4,693,935 to Mazurek discloses pressure-sensitive adhesive compositions comprising a copolymer having a vinyl polymeric backbone having grafted thereto polysiloxane moieties. U.S. Pat. No. 4,728,571 to Clemens et al. discloses release coating compositions comprising polysiloxane grafted copolymer and blends thereof on sheet materials.
SUMMARY OF THE INVENTION
The present invention provides coatings on hard tissue surfaces or surfaces of the oral environment, which coating comprises a polymer comprising repeating units
A) 1-80% by weight of a polar or polarizable group
B) 0-98% by weight of a modulating group
C) 1-40% by weight of a hydrophobic graft polysiloxane chain having molecular weight of at least 500.
The present invention also provides dental compositions suitable for coating human oral surfaces comprising a polymer comprising repeating units
A) 1-80% by weight of a polar or polarizable group
B) 0-98% by weight of a modulating group
C) 1-40% by weight of a hydrophobic graft polysiloxane chain having molecular weight of at least 500,
wherein said polymer additionally contains at least one silane moiety that is capable of undergoing a condensation reaction.
These compositions optionally may also comprise catalysts to promote the silane condensation reaction, and optionally an additional compound comprising at least two condensation silicone reaction sites that are capable of undergoing a condensation reaction. This additional compound acts as a bridging compound between the polymers described above after completion of the condensation reaction.
Additionally, it has surprisingly been found that significant enhancement of resistance to stain and bacterial adhesion may be provided by treatment of surfaces having the above coating with a surfactant.
The present invention also provides in another embodiment polymers for coating hard tissue surfaces or surfaces of the oral environment that are crosslinkable on the surface.
In yet another embodiment, dental devices are provided that have a coating comprising the polymer system as noted above.
REFERENCES:
patent: 4161518 (1979-07-01), Wen et al.
patent: 4400159 (1983-08-01), Orlowski et al.
patent: 4564557 (1986-01-01), Ohgushi et al.
patent: 4663202 (1987-05-01), Causton
patent: 4693935 (1987-09-01), Mazurek
patent: 4728571 (1988-03-01), Clemens et al.
patent: 4769431 (1988-09-01), Ratkowski
patent: 4846165 (1989-07-01), Hare et al.
patent: 4872936 (1989-10-01), Engelbrecht
patent: 4910252 (1990-03-01), Yonehara et al.
patent: 4950479 (1990-08-01), Hill et al.
patent: 4972037 (1990-11-01), Garbe et al.
patent: 4981902 (1991-01-01), Mitra et al.
patent: 4981903 (1991-01-01), Garbe et al.
patent: 4985155 (1991-01-01), Yamada et al.
patent: 5021477 (1991-06-01), Garbe et al.
patent: 5032387 (1991-07-01), Hill et al.
patent: 5032455 (1991-07-01), Dana et al.
patent: 5039735 (1991-08-01), Arai et al.
patent: 5078988 (1992-01-01), Lin et al.
patent: 5086107 (1992-02-01), Arai et al.
patent: 5154762 (1992-10-01), Mitra et al.
patent: 5188822 (1993-02-01), Viccaro et al.
patent: 5219899 (1993-06-01), Panster et al.
patent: 5244696 (1993-09-01), Hazan et al.
patent: 5322890 (1994-06-01), Ando et al.
patent: 5364693 (1994-11-01), Moren et al.
patent: 5401528 (1995-03-01), Schmidt
patent: 5725882 (1998-03-01), Kumar et al.
patent: 5888491 (1999-03-01), Mitra et al.
patent: 0 352 339 (1990-01-01), None
patent: 0 412 770 (1991-02-01), None
patent: 0 412 771 (1991-02-01), None
patent: 0 528 457 (1993-02-01), None
patent: 1104786 (1965-10-01), None
patent: WO91/13608 (1991-09-01), None
patent: WO93/23009 (1993-11-01), None
A Gaffar, et al., “Toothbrush Chemistry” Am. Chem. Soc. pp. 38-42 (Jul. 1993).
Kedrowski Brant L.
Mitra Sumita B.
Rozzi Sharon M.
Shelburne Charles E.
3M Innovative Properties Company
Dawson Robert
Keehan Christopher M
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