Dental filling materials and methods of use
AssigneePentron Clinical Technologies, LLC
InventorWeitao Jia
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Abstract
A dental filling material comprising an inner core and outer layer of material disposed and surrounding the inner core, both the inner core and outer layer of material each containing a thermoplastic polymer. The thermoplastic polymer may be biodegradable. A bioactive substance may also be included in the filling material. The thermoplastic polymer acts as a matrix for the bioactive substance. The composition may include other polymeric resins, fillers, plasticizers and other additives typically used in dental materials. The filling material is used for the filing of root canals.
Claims40
A method for restoring the root canal of a tooth comprising:
- preparing the root canal;
- applying a sealant into the root canal;
- inserting a filling material into the canal,
- wherein the filling material comprises an inner core section comprising a first thermoplastic polymer matrix material, an outer layer of material disposed on and surrounding the inner core section, wherein the outer layer of material comprises a second thermoplastic polymer matrix material, wherein the filling material has a bond strength when bonded to a root canal sealant equal to or greater than about 3 MPa, and
- wherein the first and second thermoplastic polymeric matrices optionally comprise a bioactive filler,
- wherein the first thermoplastic polymer matrix material and the second thermoplastic polymer matrix material comprise polymers having different melt flow indices, and
- wherein the polymer in the first thermoplastic polymer matrix has a lower melt flow index than the polymer in the second thermoplastic matrix.
Dependencies are inferred from the claim text.