Caries-resistant composite resin
AssigneeDen-Mat Holdings, LLC
InventorsJeff MacDonald, Alvin Kobashigawa
Life of this patent
Estimating the term…
Abstract
A direct filling composite resin restorative featuring a CTE that is similar to dentin and an antimicrobial is disclosed. The exemplary anti-microbial compound is zinc oxide. The CTE of the direct filling composite resin restorative is in the range of 12-15 ppm/° C. The low CTE is achieved by high filler loading of a trimodal distribution of low CTE filler. By maintaining a CTE substantially similar to that of dentin, the “Marginal Percolation” phenomenon is minimized, which decreases the incidence of secondary caries.
Claims19
A direct fill composite restorative composition comprising of:
- an antimicrobial agent;
- at least one resin;
- a photo initiator;
- a trimodal filler distribution with a filler load of at least or greater than 79%;
- wherein said trimodal filler distribution is comprised of 15-25% by w/w % submicron filler glass, 1-15% by w/w % 1 micron filler glass and 50-80% by w/w % 5 micron filler glass all having a coefficient of thermal expansion of less than 1 ppm/C;
- and
- whereas said trimodal filler distribution allows for greater particle-to-particle interaction and particle flow resulting in the coefficient of thermal expansion of said direct fill composite restorative composition to be in the range of 10-17 ppm/° C. and be used in direct fill dental restorative procedures to fill dental caries.
A dual component direct fill composite restorative composition comprising:
- a first component;
- said first component comprises of a first component of a binary curing system, a filler comprising of a trimodal filler distribution,
- said filler has a filler load at least or greater than 79%, at least one resin and an anti-microbial agent;
- and
- a second component;
- said second component comprises of a second component of a binary curing system, a filler comprising of a trimodal filler distribution, said filler has a filler load at least or greater than 79%, an anti-microbial, at least one resin;
- wherein said trimodal filler distribution is comprised of 15-25% by w/w % submicron filler glass, 1-15% by w/w % 1 micron filler glass and 50-80% by w/w % 5 micron filler glass all having a coefficient of thermal expansion of less than 1 ppm/C;
- and
- wherein both components are admixed prior to use to form said direct fill composite restorative composition with a coefficient of thermal expansion in the range of 10-17 ppm/° C. and used in direct fill dental restorative procedures to fill dental caries.
A method of manufacturing a direct fill composite restorative composition comprising the steps of:
- dissolving soluble components comprising of photoinitiators, inhibitors, and stabilizers into at least one resin;
- blending together a trimodal filler distribution comprised of 15-25% by w/w % submicron filler glass, 1-15% by w/w % 1 micron filler glass and 50-80% by w/w % 5 micron filler glass all having a coefficient of thermal expansion of less than 1 ppm/° C. to form a trimodal distribution of filler glasses;
- adding said trimodal distribution of filler glasses, fumed silica and at least one anti-microbial to said at least one resin to form said direct fill composite restorative composition;
- and said direct fill composite restorative composition is placed in a roll mill;
- wherein said direct fill composite restorative composition has a coefficient of thermal expansion in the range of 10-17 ppm/° C. for use in direct fill dental restorative procedures.
Dependencies are inferred from the claim text.