Dental composite restorative material and method of restoring a tooth
AssigneeDentsply DeTrey GmbH
InventorsGrodon B. Blackwell, Karen Utz
Life of this patent
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Abstract
A composite material is provided which, while having an unusually high filler content may be extruded from a dental syringe and remains easily adaptable in the dental cavity. When materials of the present invention are cured, dental restorations are provided which have unusually high surface hardness and yield strength, as well as a low volume shrinkage on curing. This is achieved by use of a mixture of filler particles with a specific size, size range, and size relationship. Such a combination of properties makes the material of the present invention particularly useful for restoring cavities in posterior teeth.
Claims13
An intra-oral or extra-oral dental restorative material comprising:
- a) at least one polymerizable monomer
- b) a first solid filler component with a mean particle size between about 0.1 and about 5 microns
- c) a second solid filler component with a mean particle size at least twenty times greater than the largest particle in the first solid filler component, and a particle size distribution such that at least about 80 percent of the particles in this second filler component are within the range of 75 to 125 percent of its mean size, determined by sieving.
Dependencies are inferred from the claim text.