Dental filling composition
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United States of America Patent
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Sep 27, 1994
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N/A
app pub date -
Sep 4, 1992
filing date -
Sep 6, 1991
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Expired
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Abstract
A dental filling composition comprising a polymerizable monomer and an inorganic filler, characterized in that the inorganic filler comprises (A) 20 to 80% by weight of spherical inorganic oxide particles with an average particle size of from 1.0 to 5.0 .mu.m, and (B) 80 to 20% by weight of spherical inorganic oxide particles which have a particle size range of at least 0.05 .mu.m and less than 1.0 .mu.m and at least 5% by weight of which is in a particle size range of from 0.05 to 0.2 .mu.m. The dental filling composition may have a high content of the inorganic filler and, upon curing, has good mechanical strength, good surface glass and smoothness, low water absorption, and transparency compared to that of natural teeth, in which smaller particles are sufficiently packed in interstices among larger particles, and smaller particles serve also for the good transparency.
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