DR. GARY EDWARD SCHUMACHER, D.D.S.
Dentist at Bureau Dr, Gaithersburg, MD

6458869, Oct 1, 2002

Mar 30, 2000

09/537703

Joseph M. Antonucci - Kensington MD
Frederick C. Eichmiller - Ijamsville MD
Gary E. Schumacher - Gaithersburg MD

National Institute of Standards of Technology - Gaithersburg MD
American Dental Association Health Foundation - Chicago IL

A61K 724

523118, 252 791, 252 792, 106 35, 424 55, 424 49, 427307, 433216

The present invention is directed to an etchant/primer composition, an etchant/primer/adhesive monomer composition, kits using the same and methods using the same for improved bonding to dental structures. The etchant/primer composition comprises a compound having the formula: wherein R=R or R ; R =an aromatic group; R =a conjugated unsaturated aliphatic group; Y=a single bond, CH , CHCH or C CH ; and each M is independently H, an alkali metal, an alkaline earth metal, aluminum, a transition or redox metal or an alkyl group having 1 to 18 carbon atoms, with the proviso that when both M groups are alkyl groups, said compound is capable of being easily hydrolyzed, displaced, or exchanged with other reagents present in the etchant/primer composition, a polar solvent system, and nitric acid. The etchant/primer/adhesive monomer composition comprises a compound having the formula (I) as noted above, a polar solvent system, an acid selected from the group consisting of nitric acid, hydrochloric acid, citric acid, lactic acid, glycolic acid, formic acid, pyruvic acid and combinations thereof, and adhesive monomer resin, and an initiator. The above-noted compositions are applied to dental structures requiring dental restoration for improved bonding of adhesive resins and polymers to dental structures.

6334775, Jan 1, 2002

Feb 16, 1999

09/250690

Huakun Xu - Gaithersburg MD
Frederick C. Eichmiller - Ijamsville MD
Gary E. Schumacher - Gaithersburg MD

American Dental Association Health Foundation - Chicago IL

A61C 500

4332281, 433220, 433224

Continuous fibers, resin-fiber pastes, or continuous fiber-reinforced preforms are inserted into tooth cavities to form high-strength dental restorations. The fibers may be mixed or coated with a resin monomer and may be used with fillers such as fluoride-releasing fillers and colorants. The resin-fiber mixture may be hardened into preforms suitable for inserting into tooth cavities. Conventional filling materials such as composite resins and glass ionomers may be used to complete the restoration. Other applications include endodontic posts, retention pins, provisional restorations, and indirect restorations. Fiber reinforcement results in strength, toughness and elastic modulus (stiffness) several times greater than those of currently available direct-filling composite resins. The fiber performs are easily handled and placed into tooth cavities; the restorations are aesthetic and wear compatible, and release fluoride. The final restoration has significantly reduced polymerization shrinkage because the fiber preform can be pre-hardened and therefore will shrink little during hardening of the final restoration.