# US 9,517,117 B2 · Fiber-reinforced composite post

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- Number: US 9,517,117 B2
- Document ID: US9517117B2
- Status: Granted
- Kind: B2
- Application number: 13/209,826
- Filed: 2011-08-15
- Published: 2011-12-08
- Granted: 2016-12-13
- Earliest claimed: 2008-03-25
- Assignees: Pentron Clinical Technologies, LLC
- Applicants: Ajit Karmaker
- Inventors: Ajit Karmaker
- Web page: https://patentgrep.com/patent/US9517117B2

## CPC

- A61C 13/30: Fastening of peg-teeth in the mouth
- A61L 15/24: Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof {(A61L15/225 takes precedence)}
- A61C 5/35: Pins; Mounting tools or dispensers therefor
- A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00)
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)

## Abstract

A fiber-reinforced composite post having an inner core section or rod fabricated of fibers impregnated in a resin matrix and an outer sheath of fibers arranged in the form of a mesh. The outer sheath comprises an interior and an exterior surface, the exterior surface is dry and unembedded fibers, and the outer sheath is attached to the inner core. In an embodiment of the dental post, the interior surface of the mesh is embedded in the resin matrix of the inner core with the inner core fibers.

## Claims

### Claim 1

A fiber-reinforced composite post comprising:
an inner core comprising fiber-reinforced composite having a first plurality of fibers impregnated in a resin matrix;
an outer sheath comprising a second plurality of fibers arranged in a mesh, wherein the mesh has an interior surface portion and a dry and unembedded exterior surface portion; and
an interface layer comprising the interior surface portion of the mesh embedded in the resin matrix of the inner core with the first plurality of fibers.

### Claim 2 (depends on 1)

The post of claim 1 wherein the resin matrix comprises acrylics, methacrylics, polyamides, polyester, polyolefins, polyimides, polyarylates, polyurethanes, vinyl esters or epoxy-based materials, styrenes, styrene acrylonitriles, ABS polymers, polysulfones, polyacetals, polycarbonates, polyphenylene sulfides, polyarylsulfides, acrylonitrile-butadiene-styrene copolymers, polyurethane dimethacrylates (“PUDMA”), the condensation product of bisphenol A and glycidyl methacrylate, 2,2′-bis [4-(3-methacryloxy-2-hydroxy propoxy)-phenyl]propane (“BIS-GMA”), hexanediol dimethacrylate (“HDDMA”), 1,6-bis (methacrylethyloxy carbonylamino) trimethyloxane (“UDMA”) or a mixture thereof.

### Claim 3 (depends on 1)

The post of claim 1 wherein the first plurality of fibers and the second plurality of fibers are each selected from glass, ceramic, metal, carbon, graphite, polymeric, cellulose, polyamide, aramid, polyester, polyaramid, acrylic, vinyl, modacrylic, polyolefin, or polytetrafluorethylene fibers, or mixtures thereof.

### Claim 4 (depends on 3)

The post of claim 3 wherein the first plurality and second plurality of fibers comprise the same material.

### Claim 5 (depends on 1)

The post of claim 1 wherein the dry and unembedded exterior surface portion of the mesh is functionalized with silane, titanate, zirconate and/or aluminate.

### Claim 6 (depends on 1)

The post of claim 1 wherein the rod has a longitudinal dimension and a lateral dimension and wherein the first plurality of fibers is aligned substantially along the longitudinal dimension of the rod.

### Claim 7 (depends on 1)

The post of claim 1 wherein the dry and unembedded exterior surface portion of the outer sheath has not been subjected to a solvent.