Dental cement composition containing composite particles with grafted polyacidic polymer chains
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United States of America Patent
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app pub date -
Sep 19, 2008
filing date -
May 26, 2004
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Abstract
A dental cement composition comprising (i) a particulate reactive inorganic filler capable of leaching metal ions in the presence of an acid, and (ii) composite particles with grafted polyacidic polymer chains, which are obtainable by a process comprising the following steps: (a) polymerizing one or more free radically polymerizable monomers containing optionally protected acidic groups in the presence of (a1) an initiatior system comprising initiator particles displaying a moiety comprising a radically transferable atom or group as a polymerization initiation site; and (a2) a catalyst facilitating controlledliving polymerisation, and (a3) optionally further polymerizable monomers, for forming a composite particle with grafted optionally protected polyacidic polymer chains; and (b) optionally deprotecting protected acidic groups, for forming composite particles with grafted polyacidic polymer chains.
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