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Root canal locator and method for measuring length of root canal

A locator and root canal technology, applied in medical science, dentistry, impedance network, etc., can solve problems such as root canal locator measurement instability, and achieve the effect of improving stability and accuracy

Pending Publication Date: 2020-11-27
盈纬达(苏州)医疗器械有限公司
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Problems solved by technology

[0003] In order to solve the above problems, the present invention provides a method for measuring root canal length with a root canal locator, which can filter out random noise, thereby solving the problem of unstable measurement during the use of the existing root canal locator

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  • Root canal locator and method for measuring length of root canal

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the drawings and the following embodiments. It should be understood that the drawings and the following embodiments are only used to illustrate the present invention rather than limit the present invention.

[0049] figure 1 It is a structural schematic diagram of an embodiment of the root canal locator of the present invention. Such as figure 1 As shown, the root canal locator includes a liquid crystal display 1, a digital signal processor (DSP) 2 connected to the liquid crystal display, a digital-to-analog converter 4 connected to the digital signal processor 2, and a digital signal processor (DSP) 2 connected to the digital signal processor. The signal amplifying circuit 5 connected to the analog-to-analog converter 4 , the first electrode 6 and the second electrode 7 connected to the signal amplifying circuit 5 , and the Kalman filter module 3 arranged inside the digital signal processor 2 . ...

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Abstract

The invention discloses a root canal locator and a method for measuring the length of a root canal. A digital signal processor sends a double-frequency excitation signal to a digital-to-analog converter so as to convert the double-frequency excitation signal into an analog signal and send the analog signal to a signal amplification circuit; an analog signal is amplified through a signal amplification circuit and is applied to teeth of the oral cavity of a patient through a root canal file serving as a first electrode, the first electrode makes contact with root canals of the teeth of the patient, a second electrode makes contact with lips of the oral cavity of the patient, and therefore the analog signal generates a feedback signal after passing through the root canals of the teeth of thepatient and is collected by the second electrode; feedback signals are fed back to the signal amplification circuit to be amplified and then sent to a digital-analog sampling channel of the digital signal processor to be sampled and converted into digital signals; at the moment, the amplitude phase of the feedback signal is calculated, the impedance of the root canal of the tooth is calculated, the length of the root canal of the patient is calculated according to the fitting relation between the impedance of the root canal and the length, Kalman filtering processing is conducted, and the final root canal length is obtained and displayed on a display screen.

Description

technical field [0001] The invention relates to the field of dental medical instruments. Background technique [0002] The measurement principle of the existing root canal locator is based on the estimation model, specifically, the tooth root canal is equivalent to an impedance, the equivalent impedance and the root canal depth of the tooth sample are counted, and the tooth equivalent impedance and the root canal depth are calculated by using the least square method. The mathematical relationship between the root canal depths, and realize the mathematical relationship in the software of the device. When measuring the patient's root canal, the device first measures the equivalent impedance of the patient's root canal, and then uses the mathematical fitting relationship to estimate the patient's root canal depth. It is easy to introduce random noise during the doctor's use, resulting in unstable measurement and misjudgment. Contents of the invention [0003] In order to so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/66H03H17/02A61C19/04
CPCH03M1/66H03H17/0257H03H17/0213A61C19/041
Inventor 杨晓波谢承科
Owner 盈纬达(苏州)医疗器械有限公司
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