Brett R Cohen, 5218434 Indian Oaks Ln, Davidson, NC 28036

D377218, Jan 7, 1997

Oct 25, 1995

D/045631

Brett I. Cohen - Nanuet NY
Barry L. Musikant - New York NY

Essential Dental Systems, Inc. - South Hackensack NJ

D24176

5185386, Feb 9, 1993

Apr 1, 1992

7/860279

Brett I. Cohen - Nanuet NY
Barry Musikant - New York NY

Essential Dental Systems, Inc. - So. Hackensack NJ

A61K 600
C08K 534

523105

A composition for preventing the build-up of plaque and other debris along the surface of dentures and dental implants is provided. The composition includes a solvent in an amount between about 46 and 98 weight percent, an evaporation promoting compound such as N-methylpyrrolidone in an amount between about 0. 5 and 25 weight percent, a polyurethane resin in an amount between about 1 and 35 weight percent and a poly(fluoro) compound such as polytetra-flluoroethylene in an amount between about 0. 5 and 20 weight percent.

6042376, Mar 28, 2000

Mar 1, 1999

9/258931

Brett I. Cohen - Nanuet NY
Barry Musikant - Tenafly NJ

Essential Dental Systems, Inc. - South Hackensack NJ

A61C 502

433102

A non-circular endodontic instrument is provided for reduced stress to the tooth and to the cutting instrument during the removal of dentin from a root canal. The non-circular endodontic instrument includes at least one area of non-contact, i. e. one portion of the instrument does not contact and does not cut the dentin material. The non-contact area extends the length of the endodontic instrument, about a portion of the circumference of the instrument, and interrupts a generally circular cutting face of the instrument. This non-contact area reduces stress and provides a place for debris to gather during cutting so as to not interfere with the cutting face, and serves to direct the debris out of the root canal. The endodontic instrument can be D-shaped in cross-section, it could have circumferentially opposing non-contact areas and/or can be elliptical in cross-sectional shape.

5263861, Nov 23, 1993

Apr 23, 1993

8/052562

Brett I. Cohen - Nanuet NY
Barry L. Musikant - New York NY

Essential Dental Systems, Inc. - South Hackensack NJ

A61C 502

433224

A composition for endodontically treating a root canal is provided. The composition uses a thermoset resin based material adapted for insertion into the root canal of a dental patient and an adhesive material suitable for maintaining the polymer based material in the root canal. Either one or both of the thermoset resin based material and the adhesive material is conductive. As a result, the dental practitioner is able to determine where the apex of the root canal is located by means of measuring the conductance between the thermoset resin based material and the oral mucosa and periodontal ligament. This facilitates the filling of the root canal with the polymer based material.

5968039, Oct 19, 1999

Oct 3, 1991

7/771173

Allan S. Deutsch - New York NY
Brett I. Cohen - Nanuet NY

Essential Dental Systems, Inc. - South Hackensack NJ

A61N 506

606 17

A laser apparatus for removing hard and soft tissue from a narrow channel has at its cutting end a configuration that causes the laser light to emerge in an annular region and not apically.

5236362, Aug 17, 1993

Jul 27, 1992

7/920157

Brett I. Cohen - Nanuet NY
Barry L. Musikant - New York NY

Essential Dental Systems, Inc. - South Hackensack NJ

A61C 500
A61K 608

4332281

A composition for endodontically treating a root canal is provided. The composition uses a thermoset resin based material adapted for insertion into the root canal of a dental patient and an adhesive material suitable for maintaining the polymer based material in the root canal. Either one or both of the thermoset resin based material and the adhesive material is conductive. As a result, the dental practitioner is able to determine where the apex of the root canal is located by means of measuring the conductance between the thermoset resin based material and the oral mucosa and periodontal ligament. This facilitates the filling of the root canal with the polymer based material.

5034433, Jul 23, 1991

Apr 10, 1990

7/508095

Brett I. Cohen - Nanuet NY
Allan S. Leutsch - New York NY
Brahma D. Sharma - Louisville CO

Essential Dental Systems, Inc. - South Hackensack NJ

A61K 608
C08J 312
C08K 340
C08L 6300

523400

A composite dental cement composition that is suitable for application with dental posts for either post insertion in a tooth or during core formation is provided. The cement composition includes a polymer matrix in an amount between about 15 and 50 weight percent, a filler in an amount between about 35 and 80 weight percent, and titanium in an amount between about 1 and 15 weight percent. The titanium ingredient chemically interacts with the polymer matrix in order to increase compressive strength of the cement composition. A fluoride compound may be added in order to substantially eliminate caries and further tooth decay.

5413480, May 9, 1995

Sep 8, 1993

8/118509

Barry L. Musikant - New York NY
Allan S. Deutsch - New York NY
Brett I. Cohen - Nanuet NY

Essential Dental Systems, Inc. - South Hackensack NJ

A61C 800
A61C 1312
A61C 13225

433173

An overdenture attachment system for selectively attaching a denture element to a post in a tooth or a root canal is provided. The system includes a keeper element which is designed to be permanently affixed to the denture element and a cap element that is designed for attachment to the post of the tooth or root canal and which is coupled to or received by the keeper element. In the preferred embodiment, the keeper element is formed with a flange portion in which the insert element is selectively received. The interior of the flange portion of the keeper element is threaded and the exterior of the cap element is correspondingly threaded in order to enable threaded engagement of the cap element inside the keeper element.