Fiber reinforced composite post
AssigneeJeneric/Pentron Incorporated
InventorsAjit Karmaker, Arun Prasad
Life of this patent
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Abstract
A dental post comprising a rod fabricated of fiber-reinforced composite material. The rod comprises a plurality of frustoconical sections arranged coaxially along the longitudinal axis of the rod. Preferably the rod has consistent width along the longitudinal axis wherein the frustoconical sections each have the same tapered width and same length. The number of frustoconical units per rod can vary. The frustoconical sections may vary in shape. Moreover, the rod may include a channel therein extending along the longitudinal axis thereof. The rod may also include one or more grooves extending along the surface thereof.
Claims18
A dental post comprising:
- a longitudinally extending rod;
- wherein the rod comprises a plurality of frustoconical units concentrically juxtaposed along the entire length of the longitudinal axis of the rod;
- wherein the rod is fabricated of fiber-reinforced composite material;
- wherein the frustoconical units comprise a pitch greater than about 1 mm and
- wherein the rod is rigid.
A dental post comprising:
- a longitudinally extending rod;
- wherein the rod comprises a plurality of frustoconical units concentrically juxtaposed along the entire length of the longitudinal axis of the rod;
- wherein the rod is fabricated of fiber-reinforced composite material;
- wherein the frustoconical units comprise a pitch greater than about 1 mm;
- wherein the rod is rigid;
- and
- wherein the post has a bond strength of greater than about 15 MPa, when the bond strength is measured between the post and a dental cement.
A dental post comprising:
- a longitudinally extending rod;
- wherein the rod comprises a plurality of frustoconical units concentrically juxtaposed along the length of the longitudinal axis of the rod;
- wherein the rod is fabricated of fiber-reinforced composite material;
- wherein a section of the rod is of a color darker than a color of a reminder of the rod;
- and
- wherein the section of the rod that is a darker color is centrally located with respect to the remainder of the rod.
A dental post comprising:
- a longitudinally extending rod;
- wherein the rod comprises a plurality of frustoconical units concentrically juxtaposed along the length of the longitudinal axis of the rod;
- wherein the rod is fabricated of fiber-reinforced composite material comprising a plurality of fibers impregnated with a polymeric matrix;
- wherein the plurality of fibers comprises one or more fibers of a color darker than the color of the remainder of the plurality of fibers;
- and
- wherein the one or more fibers of the darker color are centrally located with respect to the remainder plurality of fibers.
A dental post comprising:
- a longitudinally extending rod:
- wherein the rod comprises a plurality of frustoconical units concentrically juxtaposed along the entire length of the longitudinal axis of the rod:
- wherein the rod is fabricated of fiber-reinforced composite material;
- wherein the frustoconical units comprise a pitch greater than about 1 mm;
- wherein the rod is rigid;
- and
- wherein the dental post has a flexural strength of greater than about 800 MPa and less than about 1000 MPa.
Dependencies are inferred from the claim text.