Coating processes – Medical or dental purpose product; parts; subcombinations;... – Implantable permanent prosthesis
Patent
1992-11-19
1995-03-28
Beck, Shrive
Coating processes
Medical or dental purpose product; parts; subcombinations;...
Implantable permanent prosthesis
4332171, A61K 600
Patent
active
054015286
DESCRIPTION:
BRIEF SUMMARY
The invention relates to the use of compositions based on organically modified silicic acid polycondensates for coating teeth and dental prostheses.
Teeth, and dental prostheses produced from a variety of different materials are subject to the risk of plaque deposits.
The aim of the invention is to protect teeth and dental prostheses from plaque deposits.
According to the invention, said aim is achieved by the use of compositions based on organically modified silicic acid polycondensates. Said compositions are deposited on the teeth or dental prostheses and cured. Adhesion is extraordinarily good; an adhesion promoter is not required.
Surprisingly, it has become apparent that compositions based on organically modified silicic acid polycondensates, after curing, give coatings on the teeth and the dental prostheses that are resistant to plaque deposits. This is surprising because silicic acid polycondensate compositions are described in German patent 27 58 414 as coatings of support materials, e.g., glass vessels for the culture of tissue and cell cultures.
It is stated in column 3, lines 32 ff of said patent that the cells are bound firmly to the substrate in this case-- presumably by chemical bonding forces--so that growth in the cell system is guaranteed. Consequently, it should have been expected that coatings based on silicic acid polycondensate are completely unsuitable for the present purposes.
The compositions to be used according to the invention based on organically modified silicic acid polycondensates comprise formula (I) alkoxy, acyloxy or a chelate ligand, and x means the valency of M, and or alkenylaryl, where said radicals may be interrupted by oxygen or sulfur atoms or --NH-- groups, X means hydrogen, halogen, hydroxy, alkoxy, acyloxy or the group --NR.sub.2 ' (R'=hydrogen and/or alkyl) and n has the value 1, 2 or 3, and/or phenylene, alkylene phenylene or alkenylene, where said radicals may be interrupted by oxygen or sulfur atoms or --NH-- groups, Y means halogen atoms, hydroxy, mercapto, polyol, e.g., glycyl or glyceryl, optionally substituted amino, quaternary ammonium, amide, polyamide, aldehyde, keto, carboxy, carboxylic acid alkylester, sulfonic acid, phosphoric acid, epoxy, acryloxy or methacryloxy groups and m has the value 0, 1 or 2.
The compositions may optionally contain another component (d): element of the main groups Ia to Va or of the sub-groups IVb or Vb of the Periodic System, with the exception of titanium, zirconium, silicon, germanium, tin and aluminum, or compounds of one of said elements that are soluble in the reaction medium and form a sparingly volatile oxide under the reaction conditions.
Compositions containing the components (a), (b) and (c) and optionally (d) are known from European patent 78 548. The entire disclosed content thereof should be included here.
In the above-mentioned formulae (I), (II) and (III), radicals R, R', R", R'", X or Y present several times may each have the same or a different meaning in one compound.
The alkyl radicals mean, e.g., straight-chain, branched or cyclic radicals with 1 to 20, preferably 1 to 10 carbon atoms and in particular low alkyl radicals with 1 to 6, preferably 1 to 4 carbon atoms. Special examples are methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, pentyl, n-hexyl and cyclohexyl. The aryl radicals contain e.g., 6 to 25, preferably 6 to 14 and in particular 6 to 10 carbon atoms. Special examples are phenyl and naphthyl, phenyl being preferred.
The alkenyl radicals are e.g., straight-chain, branched or cyclic radicals with 2 to 20, preferably 2 to 10 carbon atoms and in particular low alkenyl radicals, such as vinyl, allyl and 2-butenyl.
The alkoxy, acyloxy, alkylamino, arylalkyl, alkylaryl, arylalkenyl, alkenylaryl, alkylene, alkylene phenylene, keto, carboxylic acid alkyl ester and substituted amino radicals are derived e.g., from the above-mentioned alkyl, alkenyl and aryl radicals. Special examples are methoxy, ethoxy, n- and i-propoxy, n-, sec- and tert-butoxy, acetyloxy, propionyloxy, monomethyl
REFERENCES:
patent: 4161518 (1979-07-01), Wen et al.
patent: 4243658 (1981-01-01), Chang
patent: 4243692 (1981-01-01), Scholze et al.
patent: 4504231 (1985-03-01), Koblitz et al.
patent: 5078988 (1992-01-01), Lin et al.
patent: 5112640 (1992-05-01), Warunek et al.
patent: 5112884 (1992-05-01), Hanke
patent: 5132337 (1992-07-01), Panster et al.
Patent Abstract of Japan; vol. 004, No. 159 (C-030), Nov. 6, 1990 & JP, A, 5 105 608 (Takeuchi Mitsuhara) Aug. 13, 1980.
Beck Shrive
Cameron Erma
Thera Patent GmbH & Co. KG Geselleschaft fur industrielle Schutz
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