Patrick L Roetzer

6386865, May 14, 2002

Aug 10, 1999

09/371737

Byoung I. Suh - Oak Brook IL
Patrick L. Roetzer - Benicia CA
Rich Nagel - West Chicago IL

Bisco Inc. - Schaumburg IL

A61C 100

433 27, 433223, 264 16

A process for the fabrication of indirect dental restoratives includes the making of a first, pre-operative impression of a tooth to be restored using a first polyvinyl silicone (PVS) material disposed in a clear tray, followed by the preparation of the tooth. A second, final post-operative impression of the tooth is taken utilizing a second PVS material. A tooth model is then made by pouring a low viscosity and suitably rigid, third PVS material into the final impression. Prior to the complete setting of the low viscosity PVS material, a higher viscosity, fourth PVS material is applied onto the model PVS material to form a completed model with base. The model is then fitted into the pre-operative impression matrix made from the first PVS material. Layers of composite are packed onto the impression in the clear matrix. The model (with attached base) is then inserted into the composite disposed in the first PVS material and the resulting matrix is placed in a single apparatus for conducting both light and heat cure of the dental composite.

6752630, Jun 22, 2004

Apr 9, 2002

10/120318

Patrick L. Roetzer - Benicia CA, 94510

A61C 500

433140, 600242

A dental retractor system used to manipulate positioning of the cheeks and to control saliva flow. The system includes a handle connected to first and second legs that are extended from the handle in a fork or horseshoe configuration. A pair of flaps distend from the legs and are angularly arranged to lie adjacent inner cheeks of the patient with or without interaction with a dry angle.

6817861, Nov 16, 2004

Apr 9, 2002

10/120292

Patrick L. Roetzer - Benicia CA, 94510

A61C 900

433 37, 433 38

A dental impression dam system utilizing an open tray forming a basin for dental impression material. The basin of the tray includes a gap at an extremity of the same. A flexible band of material bridges the gap of the tray basin and interacts with the dental material to form unit. The band adheres to the external wall portions of the tray when in place.

6902400, Jun 7, 2005

Oct 18, 2002

10/274568

Patrick L. Roetzer - Benicia CA, US

A61C003/02

433165, 606 80, 408200

A dental bur structure including a rotatable shaft turned by a motor. The shaft possesses a proximal portion having a fluted surface. The bur also possesses a distal portion with a smooth surface tip which generates heat to melt a composite post matrix upon activation of the shaft. The fluted surface removes a composite material while the smooth tip serves as a guide for the bur.

7137813, Nov 21, 2006

Nov 19, 2004

10/994702

Patrick L. Roetzer - Benicia CA, US

A61C 9/00

433 37, 433 38

A dental impression dam system utilizing an open tray forming a basin for dental impression material. The basin of the tray includes a gap at an extremity of the same. A flexible band of material bridges the gap of the tray basin and interacts with the dental material to form unit. The band adheres to the external wall portions of the tray when in place.

7347692, Mar 25, 2008

Dec 3, 2003

10/729572

Patrick L. Roetzer - Benicia CA, US
Michael Feldman - Lakewood NJ, US

A61C 3/02

433165

A dental bur structure including a rotatable shaft turned by a motor. The shaft possesses a proximal portion having a fluted surface. The bur also possesses a distal portion with a smooth surface tip which generates heat to melt a composite post matrix upon activation of the shaft. The fluted surface removes a composite material while the smooth tip serves as a guide for the bur.

8070490, Dec 6, 2011

Apr 29, 2010

12/799729

Patrick L. Roetzer - San Ramon CA, US
Craig Bruns - San Ramon CA, US

Danville Materials, Inc - San Ramon CA

A61C 3/12
A61C 5/12
A61C 15/00

433149, 433 75, 433142

An apparatus for separating teeth utilizing a base member having a first end portion, a second end portion, and an intermediate portion. A first spring extends outwardly from the first end portion while a second spring extends outwardly from the second portion of the base member. A lingual shield spans the distal portions of the first and second springs extending from the base member. A pair of tines overlap one another, one tine extending from the base member, the other extending from the shield. The first and second springs urge the meeting or overlapping of the first and second tines in the vicinity of gap for meeting place between a pair of teeth.

57794766, Jul 14, 1998

Apr 30, 1997

8/846793

Patrick Roetzer - Benicia CA
Ron Verner - Scottsdale AZ

A61C 306

433166

A self-limiting dental composite restoration sculpting bur particularly adapted for sculpting occlusal resins. Because of the cuspal angle of its cutting surface, the bur will make cuts that closely match the naturally occurring topography of human teeth as well as provide a visual stop that indicates when the desired cutting depth has been reached. The apparatus also includes a diamond coated cutting surface that is of such a roughness that it creates a physical stop that sends a tactile response to the operator when the bur contacts enamel. This tactile response ensures that the operator can avoid overcutting the restoration. In addition, a non-diamond coated annular band can be provided on the cutting head to create a safe zone which serves a further limit stop. The bur is mounted on a straight shaft to allow maximum vertical adjustment when mounted to a standard dental drill. The advantages include a visual depth stop, a physical stop, a shape that matches naturally occurring topography, and using a straight shaft to maximize vertical adjustability.