Root canal length measuring apparatus and root canal therapy apparatus
First Claim
1. A root canal length measuring apparatus comprising:
- a measurement electrode which is configured to be inserted into a root canal;
an oral electrode which is configured to be held in an oral cavity;
a measuring section which applies an electric measuring signal between said measurement electrode and said oral electrode and specifies an apex position so as to measure a root canal length;
a memory means configured to store a reference position in the root canal other than said apex position in response to an input by an operator made at a time that a tip of the measurement electrode reaches the reference position; and
a display section which displays said reference position.
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Accused Products
Abstract
The present invention provides a root canal length measuring apparatus and a root canal treatment apparatus which can acquire a position of a measurement electrode with high reproducibility in the same root canal. The root canal length measuring apparatus includes a measurement electrode which is inserted into a root canal, an oral electrode which is held in an oral cavity, a measuring section which applies an electric measuring signal between the measurement electrode and the oral electrode and specifies an apex position so as to measure a root canal length, a memory means which stores position data corresponding to a position of the measurement electrode in a root canal acquired by the measuring section, and an operating means which instructs the memory means to store the position data.
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Citations
18 Claims
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1. A root canal length measuring apparatus comprising:
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a measurement electrode which is configured to be inserted into a root canal; an oral electrode which is configured to be held in an oral cavity; a measuring section which applies an electric measuring signal between said measurement electrode and said oral electrode and specifies an apex position so as to measure a root canal length; a memory means configured to store a reference position in the root canal other than said apex position in response to an input by an operator made at a time that a tip of the measurement electrode reaches the reference position; and a display section which displays said reference position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 17, 18)
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13. A root canal treatment apparatus, comprising:
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a root canal length measuring apparatus having a measurement electrode configured for being inserted into a root canal, an oral electrode configured for being held in an oral cavity, a measuring section for applying an electric measuring signal between said measurement electrode and said oral electrode and for specifying an apex position for measuring a root canal length, a memory means for storing a reference position in the root canal other than the apex position in response to an input by an operator made at a time that a tip of the measurement electrode reaches the reference position; a root canal treatment tool which is configured to treat a root canal; a driving section which drives said root canal treatment tool; and a control section which controls said driving section based on said reference position stored in said memory means; and a display section which displays said reference position; and
whereinsaid measurement electrode works as said root canal treatment tool. - View Dependent Claims (14, 15)
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16. A root canal length measuring apparatus comprising:
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a measurement electrode which is configured to be inserted into a root canal; an oral electrode, which is configured to be held in an oral cavity; a measuring section which applies an electric measuring signal between said measurement electrode and said oral electrode and specifies an apex position so as to measure a root canal length; a memory means configured to store a reference position in said root canal other than that of the apex position in response to an input by an operator made at a time that a tip of the measurement electrode reaches the reference position; and a display section which displays said reference position; and wherein said apex position is determined using at least one of an impedance value of the root canal, a difference in the impedance value of the root canal during said procedure and a ratio of said difference in said impedance value and said impedance value of said root canal.
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Specification