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US 7,018,205 B2Granted
Barbed endodontic instrument
AssigneeAbelity, LLC
InventorMichael Abel
Life of this patent
Estimating the term…
Abstract
A process for producing an endodontic instrument by selectively hacking burr-like cutting projections or barbs into an elongated metal rod. A cylindrical hacking blade or other suitable blade having a convex cutting edge is preferably used to produce generally cup-shaped or concave barbs for greater strength and cutting efficiency. The barbs may be formed in a variety of shapes, sizes, orientations and patterns, such as regular or irregular helical or linear patterns, on the instrument.
Claims43
An endodontic instrument comprising:
- a rod formed from a predetermined length of superelastic material, said rod having a distal end comprising a working length of said endodontic instrument and a proximal end comprising a manipulation device;
- said working length further comprising a plurality of substantially discrete cutting projections formed thereon, said cutting projections being generally concave or cup-shaped and formed by the steps of:
- (i) striking the rod with a convex cutting edge hacking blade with sufficient force to penetrate the outer surface of said rod (ii) translating and/or rotating the rod relative to said hacking blade;
- and (iii) repeating steps (i) and (ii) to form a desired pattern or arrangement of said cutting projections.
1 more element
An endodontic instrument comprising:
- a rod formed from a predetermined length of superelastic material, said rod having a distal end comprising a working length of said endodontic instrument and a proximal end comprising a manipulation device and wherein said rod comprises a hollow rod;
- said working length further comprising a plurality of substantially discrete cutting projections formed thereon, said cutting projections being formed by the steps of:
- (i) striking the rod with a hacking blade;
- (ii) translating and/or rotating the rod relative to said hacking blade;
- and (iii) repeating steps (i) and (ii) to form a desired pattern or arrangement of said cutting projections.
2 more elements
A method for forming an endodontic instrument comprising the following steps:
- (i) supporting a rod of nickel titanium material in a rotatable chuck;
- (ii) providing a support bearing under the rod;
- (iii) impacting the rod with a convex cutting edge blade having a sufficient cutting force to create a concave barb-like cutting projection;
- (iv) translating and/or rotating the rod relative to said blade;
- and
- (v) repeating steps (iii) and (iv) to form a desired pattern or arrangement of said cutting projections along said rod.
3 more elements
A method of forming an endodontic instrument comprising the following steps:
- (i) supporting a tapered rod of nickel titanium material in a rotatable chuck:
- (ii) providing a support bearing under the rod;
- (iii) impacting the rod with a blade having a sufficient cutting force to create a barb-like cutting projection and wherein the cutting force of said blade is proportional to the diameter of said rod at the point of impact thereof,
- (iv) translating and/or rotating the rod relative to said blade;
- and
- (v) repeating steps (iii) and (iv) to form a desired pattern or arrangement of said cutting projections along said rod.
3 more elements
An endodontic instrument comprising:
- a rod formed from a predetermined length of material, said rod having a distal end comprising a working length of said endodontic instrument and a proximal end comprising a manipulation device;
- said working length further comprising a plurality of substantially discrete cutting projections formed thereon, said cutting projections being generally concave or cup-like in shape and formed by the steps of:
- (i) striking the rod with a hacking blade having a convex cutting edge;
- (ii) translating and/or rotating the rod relative to said hacking blade;
- and (iii) repeating steps (i) and (ii) to form a desired pattern or arrangement of said cuffing projections.
2 more elements
An endodontic instrument comprising:
- a rod formed from a predetermined length of material, said rod having a distal end comprising a working length of said endodontic instrument and a proximal end comprising a manipulation device and wherein said rod comprises a hollow rod;
- said working length further comprising a plurality of substantially discrete cutting projections formed thereon, said cutting projections being formed by the steps of:
- (i) striking the rod with a hacking blade having a convex cuffing edge;
- (ii) translating and/or rotating the rod relative to said hacking blade;
- and (iii) repeating steps (i) and (ii) to form a desired pattern or arrangement of said cutting projections.
2 more elements
Dependencies are inferred from the claim text.