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US 11,109,944 B2Granted
Device for providing endodontic material having a cartridge including an electrically conductive heating layer
AssigneeDENTSPLY SIRONA Inc.
InventorNathan Y. Li
Life of this patent
Estimating the term…
Abstract
A cartridge includes a chamber structure configured to contain endodontic material. An electrically conductive heating layer is provided adjacent to the chamber structure. A first electrode is positioned at one side of the cartridge, with the first electrode being in electrical contact with the heating layer, and a second electrode is positioned at a second side of the cartridge, with the second electrode being in electrical contact with the heating layer. An outer sleeve encases the chamber structure, the heating layer, and the electrodes, with an air gap being formed between the outer sleeve and the heating layer.
Claims22
A cartridge comprising:
- an endodontic material unit having a chamber structure configured to contain endodontic material;
- an electrical insulation layer provided on an outer surface of the chamber structure along a length of the endodontic material unit;
- and
- an electrically conductive heating layer having at least two zones of different resistive values provided on the electrical insulation layer, along a length of the endodontic material unit;
- a first electrode positioned at one side of the endodontic material unit, the first electrode being in electrical contact with the heating layer;
- a second electrode positioned at a second side of the endodontic material unit, the second electrode being in electrical contact with the heating layer;
- an outer sleeve encasing the endodontic material unit including the chamber structure, the heating layer, and the electrodes;
- a thermal insulation layer provided on the heating layer and between the electrodes;
- wherein an air gap is provided between the thermal insulation layer and the outer sleeve.
6 more elements
An endodontic application device comprising:
- a cartridge that includes:
- an endodontic material unit having a chamber structure configured to contain endodontic material;
- an electrical insulation layer provided on an outer surface of the chamber structure along a length of the endodontic material unit;
- and
- an electrically conductive heating layer having at least two zones of different resistive values provided on the electrical insulation layer, along a length of the endodontic material unit;
- a first electrode positioned at one side of the endodontic material unit, the first electrode being in electrical contact with the heating layer;
- a second electrode positioned at a second side of the endodontic material unit, the second electrode being in electrical contact with the heating layer;
- an outer sleeve encasing the endodontic material unit including the chamber structure, the heating layer, and the electrodes;
- a thermal insulation layer provided on the heating layer and between the electrodes;
- and
- a needle extending from an end of the cartridge such that the endodontic material may move from the chamber structure to the needle;
- wherein an air gap is provided between the thermal insulation layer and the outer sleeve;
- and
- a handle assembly to which the cartridge is attached, handle assembly including a plunger configured to act on part of the cartridge to force endodontic material contained in the chamber structure out of the cartridge through the needle.
11 more elements
A cartridge comprising:
- an endodontic material unit having a chamber structure configured to contain endodontic material;
- an electrically conductive heating layer provided to an outer surface of the chamber structure along a length of the endodontic material unit;
- a first electrode positioned at one side of the endodontic material unit, the first electrode being in electrical contact with the heating layer;
- a second electrode positioned at a second side of the endodontic material unit, the second electrode being in electrical contact with the heating layer;
- a third electrode positioned between the first electrode and the second electrode along a length of the endodontic material unit;
- and
- an outer sleeve encasing the endodontic material unit including the chamber structure, the heating layer, and the electrodes.
4 more elements
An endodontic material application device comprising:
- a handle assembly;
- and
- a cartridge for containing an endodontic material, the cartridge being mounted to the handle assembly, and the cartridge comprising:
- an endodontic material unit having a chamber structure configured to contain endodontic material;
- an electrically conductive heating layer provided to an outer surface of the chamber structure along a length of the endodontic material unit;
- a first electrode positioned at one side of the endodontic material unit, the first electrode being in electrical contact with the heating layer;
- a second electrode positioned at a second side of the endodontic material unit, the second electrode being in electrical contact with the heating layer;
- a third electrode positioned between the first electrode and the second electrode along a length of the endodontic material unit;
- and
- an outer sleeve encasing the endodontic material unit including the chamber structure, the heating layer, and the electrodes,
- wherein the device is configured such when a current is applied between the electrodes, more heat is generated in the heating layer between the first electrode and the third electrode than between the third electrode and the second electrode.
8 more elements
A cartridge comprising:
- an endodontic material unit having a chamber structure configured to contain endodontic material;
- an electrical insulation layer provided on an outer surface of the chamber structure along a length of the endodontic material unit;
- an electrically conductive heating layer provided on the electrical insulation layer along a length of the endodontic material unit;
- a first electrode positioned at one side of the endodontic material unit, the first electrode being in electrical contact with the heating layer;
- a second electrode positioned at a second side of the endodontic material unit, the second electrode being in electrical contact with the heating layer;
- an outer sleeve encasing the endodontic material unit including the chamber structure, the heating layer, and the electrodes,
- an insulating sheath provided between the endodontic material unit and the outer sleeve;
- a first plurality of spacer pegs provided on an outer surface of the endodontic material unit, such that a first thermally insulating air gap is created between the endodontic material unit and the insulating sheath;
- a second plurality of spacer pegs provided on an outer side of insulating sheath, such that a second thermally insulating air gap is created between the insulating sheath and the outer sleeve;
- and
- a needle extending from an end of the chamber structure such that the endodontic material may move from the chamber structure to the needle;
- wherein the outer sleeve includes an electrode in electrical contact with the first electrode and another electrode in electrical contact with the second electrode;
- wherein the insulating sheath further comprises a locking ring to secure the endodontic material unit;
- and
- wherein some of the first plurality of spacer pegs provided on the outer surface of the endodontic material unit is set to the locking ring as the endodontic material unit is inserted into the insulating sheath, with the spacers pegs then being set in a locked position by the locking ring when the endodontic unit is rotated in the insulating sheath.
12 more elements
Dependencies are inferred from the claim text.