Other

Lanxide Technology Company, LP

W. L. Gore & Associates, Inc.

Dentsply International Inc.

Brunswick Corporation

Dentsply Sirona Inc.

Gore Enterprise Holdings, Inc.

Tulsa Dental Products Inc.

Outdoor Innovations, L.l.c.

Dentsply Research & Development Corp.

W.l. Gore & Associates, Co., Ltd.

Japan Gore-tex Inc.

Voltea B.v.

Johnson, William B.

William B Johnson

Terry D Claar

Gerhard H Schiroky

Danny R White

Wen K Liu

Paul D Drumheller

Xin Kang Chen

Jack J Hegenbarth

Rachel Radspinner

Ping Xu

Marc S Newkirk

Kevin P Pochopien

Carl J Berendt

Steven M Mason

Michael K Aghajanian

Robert A Rapp

Rayford A Cockerham

James C Wang

Mahmoud Torabinejad

David K Creber

Donald P Ripa

Christopher R Kennedy

Robert C Kantner

Michael A Rocazella

Jerry G Weinstein

Birol Sonuparlak

Eugene S Park

Ali S Fareed

David Zuckerbrod

Carl H Jones

Keiichi Yamakawa

Thomas Berta

Steve Hardwick

John M Blaha

E Scott Johnson

Michael F Priesnitz

Mahesh Murthy

James P Sullivan

Simon J C Cleghorn

Wen Liu

Ronald Reid

An endodontic instrument of this disclosure has less torque strength but greater flexibility and enlarged chip space compared to the prior art. In embodiments. only two flutes are spiraled about the instrument's length L to form two non-landed cutting edges between Dand D, the cutting edges merging to form a land at about D. The tip end is rounded. The helical angle α increases from the handle end toward the tip end, a number of spirals per unit length being at least two times greater toward the tip end than toward the handle end, a cross-section of the length L consisting of two convex portions intersecting at each cutting edge or a wave-shape having one concave portion and one convex portion intersecting at each cutting edge, the cross-section occupying less total area than would a same size endodontic instrument having a triangular cross-section and providing greater chip space.

Endodontic instrument with enlarged chip space and reduced torque strength

An endodontic instrument of this disclosure has less torque strength but greater flexibility and enlarged chip space compared to the prior art. In embodiments. only two flutes are spiraled about the instrument's length L to form two non-landed cutting edges between Dand D, the cutting edges merging to form a land at about D. The tip end is rounded. The helical angle &#x3b1; increases from the handle end toward the tip end, a number of spirals per unit length being at least two times greater toward the tip end than toward the handle end, a cross-section of the length L consisting of two convex portions intersecting at each cutting edge or a wave-shape having one concave portion and one convex portion intersecting at each cutting edge, the cross-section occupying less total area than would a same size endodontic instrument having a triangular cross-section and providing greater chip space.

An improved rotary endodontic file includes a multi-planar pre-curved apical portion having a first and a second curvature. The pre-curved apical portion begins at about one-third to one-quarter of the working length as measured from the tip end of the endodontic instrument. The first and second curvature permit the file to continually search and engage the walls of a tooth root canal in a forced inside-forced outside manner. As the file works its way down, it breaks free of any ledges encountered, probes lateral- and delta-type openings, and does not allow the file to stray from the curvature of the canal.

Multi-planar pre-curved rotary endodontic file

A fatigue-resistant Nitinol instrument has a working portion in the deformed monoclinic martensitic state and an austenite finish temperature in the range of 40&#xb0; to 60&#xb0; C. Because the operating environment of the instrument is about 37&#xb0; C., the working portion remains in the monoclinic martensitic state during its use. The relatively high austenite finish temperature and fatigue resistance is achieved by subjecting the nickel-titanium alloy to a final thermal heat treat in a temperature range of about 410&#xb0; to 440&#xb0; C. while the nickel-titanium alloy is under constant strain of about 3 to 15 kg. Further, the high austenite finish temperature is achieved without subjecting the alloy to thermal cycling to produce shape memory. Additionally, there are no intermediate processing steps occurring between obtaining a finished diameter of the wire or blank through cold working and the final thermal heat treat under constant strain.

Fatigue-resistant Nitinol instrument

A composite membrane and moisture adjustment module using the same is disclosed. The composite membrane includes a moisture-permeable resin layer interposed between porous membranes that constitute a pair; and the mean thickness of the moisture-permeable resin layer is 5 &#x3bc;m or less.

Composite membrane and moisture adjustment module using same

A functional TFE copolymer fine powder is described, wherein the TFE copolymer is a polymer of TFE and at least one functional comonomer, and wherein the TFE copolymer has functional groups that are pendant to the polymer chain. The functional TFE copolymer fine powder resin is paste extrudable and expandable. Methods for making the functional TFE copolymer are also described. The expanded functional TFE copolymer material may be post-reacted after expansion.

Expandable functional TFE copolymer fine powder, expanded products and reacted products therefrom

A method of producing an endodontic file that involves grinding in a plane substantially parallel to the longitudinal axis of a rotating dental instrument blank. By grinding the dental instrument blank in this manner, the torsional strength of the resulting endodontic file is not eroded during its production, thereby providing a file that is less susceptible to breakage during its use.

Longitudinally ground file having increased resistance to torsional and cyclic fatigue failure

Expandable functional TFE copolymer fine powder, the expanded functional products obtained therefrom and reaction of the expanded products

Methods for disinfecting and removing smear layer from prepared tooth surfaces are provided. The methods involve irrigating the tooth surface with a disinfectant solution containing doxycycline or tetracycline, a surfactant such as polysorbate, and organic acid such as citric acid. The methods can be used in various dental treatments including, for example, endodontic and periodontic procedures as well as tooth restoration and reconstruction.

Methods for disinfecting and removing smear layer from tooth surfaces

Growing community of inventors

Tulsa, OK, United States of America

William B Johnson