Endodontic system and method
AssigneeDENTSPLY SIRONA Inc.
InventorMarkus Borgschulte
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Abstract
The present invention provides a system for the endodontic treatment of a root canal that includes (i) an endodontic instrument; (ii) an endodontic handpiece having a drive motor for rotating the endodontic instrument releasably attached to the handpiece; (iii) a control unit for controlling the rotation of the endodontic instrument according to one or more predetermined rotational sequences.
Claims13
A system for the endodontic treatment of a root canal, comprising
- (i) an endodontic instrument;
- (ii) an endodontic handpiece having a drive motor for rotating the endodontic instrument releasably attached to the handpiece;
- (iii) a control unit for controlling the rotation of the endodontic instrument according to one or more predetermined rotational sequences;
- the rotational sequences comprising reciprocating the endodontic instrument by continuously sequentially rotating the endodontic instrument in a first direction followed by reversing the direction of rotation so that 0.5×ψ≦α<ψ and 3≦α/β≦20,
- wherein α represents a rotational angle in a direction in which the rotating endodontic instrument removes debris from the root canal, β represents a rotational angle in the opposite direction, and ψ represents the elastic angle of the endodontic instrument at which plastic deformation occurs in the direction of α;
- and
- wherein the control unit controls a frequency of reciprocation (Fr) in a range of from 5 to 30 Hz.
The system for the endodontic treatment of a root canal according to claim 1, 4≦α/β≦10, and α and β are as defined in claim 1.
A method for operating the system for the endodontic treatment of a root canal, the method comprising the steps of:
- reciprocating an endodontic instrument in a first rotational direction when a control parameter is less than or equal to a threshold value, wherein the control parameter is a number of reciprocation cycles;
- and further when the control parameter is greater than the threshold value reciprocating the endodontic instrument by continuously sequentially rotating the endodontic instrument in the first direction followed by a rotational direction opposite of the first rotational direction so that 0.5×ψ≦α≦ψ and 3≦α/β≦20, wherein α represents a rotational angle in a direction in which the rotating endodontic instrument removes debris from the root canal, β represents a rotational angle in the opposite direction, and ψ represents the elastic angle of the endodontic instrument at which plastic deformation occurs in the direction of α.
Dependencies are inferred from the claim text.