Multi-planar pre-curved rotary endodontic file
US-10136962-B2 · Nov 27, 2018 · US
Endodontic instruments
US9901418B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9901418-B2 |
| Application number | US-201414311134-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 20, 2014 |
| Priority date | Jun 20, 2013 |
| Publication date | Feb 27, 2018 |
| Grant date | Feb 27, 2018 |
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- Title
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Abstract
Official abstract text for this publication.
A rotatable endodontic file for cleaning/shaping a tooth root canal, comprising: an elongated shaft having a proximal end portion, a distal end and a tapered working portion having a rotational axis, the working portion extending from said proximal portion to said distal end; the external surface of said shaft working portion having a plurality of at least two spirals, a parallelogram-shaped cross section that has an axis of rotation that is asymmetric such that the center of mass (centroid) is not along the file axis.
First claim
Opening claim text (preview).
The invention claimed is: 1. A rotatable endodontic file for cleaning/shaping a tooth root canal, comprising: an elongated shaft having a proximal end, a proximal end portion, a distal end and a tapered working portion having a file axis, the working portion extending from said proximal end portion to said distal end; an external surface of said shaft working portion being defined by at least two spirals that define at least two opposing curved side walls of a plurality of parallelogram-shaped cross sections along the working portion, at least two of the plurality of parallelogram-shaped cross sections having an acute angle and an axis of rotation that is asymmetric such that a center of mass is not along the file axis, wherein a first parallelogram-shaped cross section has a first center of mass and a second parallelogram-shaped cross section has a second center of mass being different from the first center of mass of said first parallelogram-shaped cross section, both the first center of mass of the first parallelogram-shaped cross section and the second center of mass of the second parallelogram-shaped cross section are not along the file axis. 2. An endodontic file according to claim 1 , wherein the first parallelogram-shaped cross section has an acute angle that is larger towards the proximal end portion than an acute angle of the second parallelogram-shaped cross section towards the distal end. 3. An endodontic file according to claim 2 , wherein the acute angles range between 50 degrees and 85 degrees. 4. An endodontic file according to claim 1 wherein the acute angles range between 50 degrees and 85 degrees. 5. An endodontic file according to claim 1 , wherein the file is composed of a material selected from the group consisting of a Nitinol based material, Cu based material, titanium based material and a stainless steel based material. 6. An endodontic file according to claim 5 , wherein the material is processed by high temperature, cold temperatures and/or strain. 7. An endodontic file according to claim 1 , wherein the endodontic file is a variable tapered file. 8. An endodontic file according to claim 1 , wherein the endodontic file is a constant tapered file.
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- What does patent US9901418B2 cover?
- A rotatable endodontic file for cleaning/shaping a tooth root canal, comprising: an elongated shaft having a proximal end portion, a distal end and a tapered working portion having a rotational axis, the working portion extending from said proximal portion to said distal end; the external surface of said shaft working portion having a plurality of at least two spirals, a parallelogram-shaped cr…
- Who is the assignee on this patent?
- Dentsply Int Inc, Dentsply Sirona Inc
- What technology area does this patent fall under?
- Primary CPC classification A61C5/42. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Feb 27 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).