Frederick C Eichmiller

US Patent:

6334775, Jan 1, 2002

Filed:

Feb 16, 1999

Appl. No.:

09/250690

Inventors:

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

Assignee:

American Dental Association Health Foundation - Chicago IL

International Classification:

A61C 500

US Classification:

4332281, 433220, 433224

Abstract:

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.

US Patent:

6375894, Apr 23, 2002

Filed:

May 9, 1995

Appl. No.:

08/437650

Inventors:

David S. Lashmore - Lebanon NH
Moshe P. Dariel - Rockville MD
Christian E. Johnson - MIddletown MD
Menahem B. Ratzker - Silver Spring MD
Anthony A. Guiseppetti - Frederick MD
Frederick C. Eichmiller - Ijamsville MD
Glenn L. Beane - Plymouth NH
David R. Kelley - Martinsburg WV

Assignee:

The United States of America as represented by the Secretary of Commerce - Washington DC
American Dental Association Health Foundation - Gaithersburg MD

International Classification:

A61C 500

US Classification:

419 64, 264 16, 433226, 4332281

Abstract:

A metallic composite solid, containing alloys and/or intermetallics, is formed by compacting at moderate pressure a mixture of powder particles, foils or sheets at a temperature close to room temperature, well below the melting temperature of the constituent components and without the addition of low melting metals such as mercury, indium or gallium acting as a sintering agent. This low temperature consolidation of the powder mixture is enhanced by having the surface oxide of the powder particles removed, prior to consolidation, and/or by coating the particles with an oxide-replacing metal such as silver or gold. The coating process may be replacement reactions, autocatalytic reduction or electrolytic reduction. The composite formation is assisted by the addition of a liquid acid such as fluoroboric acid, sulfuric acid, fluoric acid, adipic acid, ascorbic acid, or nitric acid. A preferred embodiment of the process for metal solid composite formation is a process for forming dental restorative materials at ambient temperatures and under pressure exerted by manual dental instrumentation.

US Patent:

6458869, Oct 1, 2002

Filed:

Mar 30, 2000

Appl. No.:

09/537703

Inventors:

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

Assignee:

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

International Classification:

A61K 724

US Classification:

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

Abstract:

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.

US Patent:

6871550, Mar 29, 2005

Filed:

Aug 14, 2003

Appl. No.:

10/640774

Inventors:

Frederick C. Eichmiller - Ijamsville MD, US

Assignee:

American Dental Association Foundation - Chicago IL

International Classification:

G01N003/008

US Classification:

73827

Abstract:

An apparatus and method for measuring the characteristics of curing polymers. The apparatus and method utilize cantilever beam technology to determine characteristics of polymers during the curing process, including but not limited to, stress-related forces that develop during the polymer curing process. The apparatus and method also provide for controlling and monitoring environmental conditions during the curing process.

US Patent:

6955716, Oct 18, 2005

Filed:

Mar 1, 2002

Appl. No.:

10/086484

Inventors:

Huakun Xu - Gaithersburg MD, US
Laurence C. Chow - Potomac MD, US
Shozo Takagi - Gaithersburg MD, US
Frederick C. Eichmiller - Ijamsville MD, US

Assignee:

American Dental Association Foundation - Gaithersburg MD

International Classification:

C04B012/02

US Classification:

106 35, 106690, 106691, 106792, 423308, 423309, 423311, 623 16

Abstract:

A bone replacement material and therapy comprises the combination of calcium phosphate compounds and two or more soluble fillers in the form of fibers, mesh or other materials which have the dual functions of reinforcing an in vivo implant while dissolving at a programmed rate to form macropores capable of receiving natural bone ingrowth.

US Patent:

7018460, Mar 28, 2006

Filed:

Oct 28, 2004

Appl. No.:

10/975190

Inventors:

Huakun Xu - Gaithersburg MD, US
Laurence C. Chow - Potomac MD, US
Shozo Takagi - Gaithersburg MD, US
Frederick C. Eichmiller - Ijamsville MD, US

Assignee:

American Dental Association Health Foundation - Chicago IL

International Classification:

C04B 12/02

US Classification:

106 35, 106690, 106691, 106692, 423308, 423309, 423311, 623 2356, 623 2361

Abstract:

A bone replacement material and therapy comprises the combination of calcium phosphate compounds and two or more soluble fillers in the form of fibers, mesh or other materials which have the dual functions of reinforcing an in vivo implant while dissolving at a programmed rate to form macropores capable of receiving natural bone ingrowth.

US Patent:

7619016, Nov 17, 2009

Filed:

Jul 2, 2004

Appl. No.:

10/883011

Inventors:

Sabine H. Dickens - Montgomery Village MD, US
Frederick C. Eichmiller - Ijamsville MD, US

Assignee:

ADA Foundation - Chicago IL

International Classification:

A61K 6/083
A61C 5/00

US Classification:

523117, 523118, 433 2, 4332281

Abstract:

Remineralizing dental cements contain source(s) of calcium and phosphate ions, adhesive resin monomers, reinforcing base resin monomers, and catalysts able to initiate the polymerization of the adhesive and reinforcing base resin monomers. Such dental cements can be used as orthodontic cements, crown and bridge cements, adhesives, sealants, cavity liners, and protective coatings. The release of calcium and phosphate ions and, optionally, fluoride ions, protects tooth structure from demineralization, a precursor of tooth decay.

US Patent:

20020127130, Sep 12, 2002

Filed:

Dec 27, 2001

Appl. No.:

10/034861

Inventors:

David Lashmore - Lebanon NH, US
Moshe Dariel - Rockville MD, US
Christian Johnson - Middletown MD, US
Menahem Ratzker - Silver Spring MD, US
Anthony Guiseppetti - Frederick MD, US
Frederick Eichmiller - Ijamsville MD, US
Glenn Beane - Plymouth NH, US
David Kelley - Martinsburg WV, US

Assignee:

US, as Represented by the Secretary, Dept. of Commerce, National Inst. of Standards &Technology - Washington DC

International Classification:

B22F001/00

US Classification:

419/064000

Abstract:

A metallic composite solid, containing alloys and/or intermetallics, is formed by compacting at moderate pressure a mixture of powder particles, foils or sheets at a temperature close to room temperature, well below the melting temperature of the constituent components and without the addition of low melting metals such as mercury, indium or gallium acting as a sintering agent. This low temperature consolidation of the powder mixture is enhanced by having the surface oxide of the powder particles removed, prior to consolidation, and/or by coating the particles with an oxide-replacing metal such as silver or gold. The coating process may be replacement reactions, autocatalytic reduction or electrolytic reduction. The composite formation is assisted by the addition of a liquid acid such as fluoroboric acid, sulfuric acid, fluoric acid, adipic acid, ascorbic acid, or nitric acid. A preferred embodiment of the process for metal solid composite formation is a process for forming dental restorative materials at ambient temperatures and under pressure exerted by manual dental instrumentation.