TWI505818B - Method and system of monitoring abnormal usage state of a medical drill element - Google Patents

Description

Method and system for detecting abnormal use state of medical drill pieces

The present invention generally relates to a method and system for detecting an abnormal usage state of a drill element, and more particularly to detecting an abnormal use state of a medical drill element. Method and system.

In the prior art, the crack monitoring of a large mechanical structure is mainly carried out by a signal received by a sensor embedded in a large mechanical structure and further analyzed by a processing system. Implemented.

However, in the field of dentistry root canal treatment, it is more difficult to monitor cracks in smaller endodontic files. Because the root canal is small in size, it is not sufficient to accommodate the embedded sensor or to have the sensor disposed thereon. In addition, even if the sensor can be barely placed on the root canal, the bending and vibration of the root canal may cause the sensor to peel off during root canal modification or cutting. Or damaged.

At present, the observation of the root canal fissure crack is usually the time point at which the fracture surface can be detected by a scanning electron microscope after the root canal needle fracture. However, since the analysis of the fracture surface differs depending on the experience of the observer, and the bending manner of the root canal varies from person to person, the time at which the fracture surface is observed by the scanning electron microscope and the crack is retracted may occur. The technology is still limited in practical applications.

In addition, another conventional method for observing the crack of the root canal needle is to move the root canal needle to another machine for further rigidity test after each time the root canal needle is actually operated for a period of time (stitfness test) ). Through the change of rigidity, it is possible to know whether there is damage such as crack occurrence, but the time required for the rigidity test is ten times the actual operation of the root canal needle, and once the crack occurs, it may run for a few seconds to several tens of seconds. Completely broken, so the technique of rigid testing to summarize the point in time at which the fracture may occur is still considerably limited in practical applications.

Moreover, the above prior art techniques are not techniques for instant detection.

The present invention provides a method and system for detecting an abnormal use state of a medical drill member, which can instantly detect an abnormal state of a medical drill member in use.

The present invention provides a method of detecting an abnormal use state of a medical drill member, which includes the following steps. First, a sensor is configured in a manner that is not directly disposed in the medical drill, such that the sensing range of the sensor encompasses at least a portion of a medulated object. Next, the sensor receives a plurality of detectable signals generated when the medical drill bit is drilled into the medical object to be treated. Then, a processing system determines whether the abnormal use state of the medical drill member is detected according to the sensible signals received by the sensor.

In an embodiment of the invention, the method further comprises: if the processing system determines that the abnormal use state of the medical drill member is detected, the medical drill member stops operating.

In an embodiment of the invention, the sensible signals are vibration waves. Number (vibrational wave signal).

In an embodiment of the invention, the sensor is an acoustic wave sensor, a fiber sensor, a piezoelectric sensor or a strain sensor.

In an embodiment of the invention, the above method further comprises the following steps. First, an optical signal generator generates a plurality of first optical signals. The sensor converts a portion of the first optical signals into a plurality of second optical signals when receiving the sensible signals. Then, a photo detector receives the energy of the coupled optical signals of one of the second optical signals and the other of the first optical signals, and converts the energy of the coupled optical signals into a voltage signal. The processing system determines, according to the sensible signals received by the sensor, whether the abnormal use state of the medical drill member is detected, and the processing system determines whether the medical drill is detected according to the voltage signals. The abnormal use status of the piece.

The present invention provides a system for detecting an abnormal use state of a medical drill member, comprising a sensor and a processing system. The sensor is adapted to be configured in a manner that is not directly configurable to the medical drill, such that the sensing range of the sensor encompasses at least a portion of a medical object to be treated. The processing system is coupled to the sensor. The sensor is adapted to receive a plurality of sensible signals generated when the medical drill member is drilled into the medical object to be treated, and the processing system is adapted to determine whether the medical device is detected according to the sensible signals received by the sensor. The abnormal use state of the drill.

In an embodiment of the invention, the sensor is an acoustic wave sensor, a fiber optic sensor, a piezoelectric sensor or a strain sensor.

In an embodiment of the invention, the system for detecting an abnormal use state of the medical drill member further includes an optical signal generator and a photo detector. The optical signal generator is adapted to generate a plurality of first optical signals. The sensor converts one of the first optical signals into a plurality of second optical signals when receiving the sensible signals. The photodetector is adapted to receive energy of the coupled optical signals of one of the second optical signals respectively coupled to the other of the first optical signals, and convert the energy of the coupled optical signals into a voltage signal. The processing system determines whether the abnormal use state of the medical drill is detected based on the voltage signals.

The method and system of the present invention for detecting an abnormal use state of a medical drill member has the following or other advantages. Because the sensor detects the sensible signal of the medical drill in use in the method and system for detecting the abnormal use state of the medical drill, the processing system can immediately determine whether to detect based on the sensible signal. Unusual use of medical drills to avoid further damage to medical drills.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a flow chart of a method for detecting an abnormal use state of a medical drill member according to an embodiment of the invention. 2 is a schematic diagram showing a configuration relationship between a medical drill, the object to be treated, and a sensor. Referring to FIG. 1 and FIG. 2, the method for detecting an abnormal use state of the medical drill member of the embodiment includes the following steps. First, step P11 is performed to configure a sensor 110 in a manner not directly disposed on the medical drill 130, so that the sensing range of the sensor 110 covers a medical object to be treated. At least part of T1. In the present embodiment, the medical drill member 130 is, for example, a root canal for the treatment of a root canal, and the medical object T1 is, for example, a tooth.

In this embodiment, the sensor 110 can be a fiber optic sensor that can be disposed on the driving device T1 or the driving device 132 of the medical drill 130. A sensor 110, such as a fiber optic sensor, can sense stress wave signals. In another embodiment, the sensor 110 is an acoustic wave sensor that is adjacent to the medical object T1 but not directly disposed on the object T1 to be treated. The configuration of the sensor 110 is configured in such a manner that the sensing range of the sensor 110 covers at least a portion of the medical object T1 to be treated. In addition, in another embodiment, the sensor 110 can be a piezoelectric detector or a strain sensor.

Next, in step P12, the sensor 110 receives a plurality of sensible signals generated when the medical drill 130 is drilled into the object T1 to be treated. In the present embodiment, the medical drill member 130, such as a root canal needle, is drilled into a root canal T12, such as a tooth to be treated T1, and the sensor 110 receives these vibration wave signals. The vibration wave signals include vibration wave signals generated when the medical drill member 130 is rotationally biased to the medical object T1 to be treated (for example, the rotating medical drill member 130 contacts the medical object T1 by cutting, rubbing, etc.). The vibration wave can be expressed as a vibration stress wave and transmitted through the solid medium, and the vibration wave can also be expressed as a vibration sound wave and transmitted through the air medium.

Then, in step P13, a processing system 120 determines whether the abnormal use state of the medical drill member 130 is detected according to the sensible signals received by the sensor 110.

Then, step P14 can be selectively performed. If the processing system 120 determines that the abnormal use state of the medical drill member 130 is detected, the medical drill member 130 stops operating or the processing system 120 issues a warning message.

The above method of detecting the abnormal use state of the medical drill member will be supplemented by a simulation experiment in the laboratory. In the following simulation experiment, the medical drill 130 was selected as a root canal.

FIG. 3 is a schematic diagram showing the configuration of a system for simulating a simulated experiment in which the abnormality of the root canal is used. Referring to FIG. 3, the system 200 for detecting the abnormal use state of the root canal includes a sensor 210, a processing system 220, an optical signal generator 250, an optical coupler 270, and a light detection. 260. The optical signal generator 250 includes an optical filter 255, a laser light source 252, an Erbium-Doped Fiber (EDF) 251, an isolator 253, and an optical coupler 254. With a circulator 256. The sensor 210 is, for example, a fiber optic sensor, such as a fiber bragg grating sensor (FBG sensor). The optical filter 255 is, for example, a fiber bragg grating filter (FBG filter). The sensor 210, the optical filter 255, the laser source 252, the erbium doped fiber 251, the optical isolator 253, the optical coupler 254, the circulator 256, the photodetector 260, and the optical coupler 270 are optically optically 290 Sexually coupled to form an optical arrangement structure PA1. The photodetector 260 is electrically coupled to the processing system 220. It must be noted here that the fiber grating sensor and the fiber grating filter can have two identical structures, but the purpose of use is different, as will be described later.

The sensor 210 is disposed on one of the two jigs J1. The rotating root canal needle 230 is clamped by the two clamps J1 to form a curved shape to simulate the dentist's root canal 230 when the root canal needle 230 is drilled into the root canal of the tooth in the root canal treatment practical application. The displayed bending state. The root canal needle 230 is rotated by the drive unit 232 at 400 rpm to simulate the rotational speed of the root canal 230 rotated by the driver (not shown) by the dentist in the actual application of the root canal treatment.

An optical filter 255, such as a fiber grating filter, is used to filter the optical signals transmitted to the optical filter 255 to form optical signals having a narrow bandwidth. In other words, after the optical signal transmitted to the optical filter 255 passes through the optical filter 255 such as a fiber grating filter, the optical filter 255 reflects the optical signal having a narrow bandwidth. In addition, after all the components of the optical signal generator 250 are operated for a period of time, the optical signal generator 250 generates a plurality of narrow-band optical signals S12 to optical couplers 270 having a narrow bandwidth and a large intensity. A portion of these narrowband optical signals S12 are transmitted to a sensor 210, such as a fiber grating sensor.

The vibration stress wave generated when the sensor 210 receives the rotation of the root canal 230 by one of the clamps J1 (for example, the rotating root canal 230 contacts one of the clamps J1 by cutting, friction, etc.) At the time of the signal, the grating of the sensor 210, such as a fiber grating sensor, is subjected to vibration stress waves. At this time, after the narrow-band optical signal S12 transmitted to the sensor 210 is applied by the sensor 210, the narrow-band optical signals S13 reflected by the sensor 210 generate frequency drift relative to each other. In other words, when receiving the sensible vibration wave signals, the sensor 210 converts the narrow-band optical signals S12 transmitted to the sensor 210 into narrow-band optical signals S13 that generate a frequency drift phenomenon with respect to each other.

At least a portion of the narrowband optical signals S13 are coupled to the other portion of the narrowband optical signals S12 as coupling optical signals S14. The photodetector 260 receives the energy of the coupled optical signal S14 and converts the energy of the coupled optical signal S14 into a voltage signal. In other words, if a certain narrow-band optical signal S13 is spectrally overlapped with a certain narrow-band optical signal S12, the photodetector 260 extracts the energy of the overlapping portions and converts it into a voltage signal.

After the voltage signal is processed by the processing system 220 to remove noise, further filtering, and mathematical conversion (such as Fourier transform or Hilbert transform), the voltage amplitude is related to time in a specific frequency range, such as Figure 4 shows. It must be noted here that in this simulation experiment, the specific frequency range selected is 20 to 40 Hz, and the mathematical conversion is a Fourier transform. Since the rotational speed of the root canal needle 230 is 400 rpm, and the root canal 230 of the experiment has three peaks in cross section, the root canal 230 cuts the frequency of the clamp J1 where the sensor 210 is located. It is 1200 rpm, which is 20 Hz. Based on the above, the change in voltage amplitude with respect to time at a frequency of 20 Hz or an appropriate multiple thereof should be significant. Therefore, the selected specific frequency range of 20 to 40 Hz is determined based on the number of peaks of the root canal 230 and the rotational speed, but the selected frequency range is not necessarily the only available frequency range.

Referring to FIG. 4, when the peak A1 appears in the change diagram, the processing system 220 can determine that the root canal 230 is in an abnormal use state. The peak A1 is selected based on the difference between the amplitude of the peak A1 and the amplitude of the previous peak, or the amplitude of the peak A1 is higher than the average of the previous peak amplitudes by another difference. And selected. In another embodiment, the selection of the peak A1 may also be based on other criteria, which is not limited herein. It must be emphasized here that For this simulation experiment, the abnormal use state of the root canal needle 230 can be interpreted as a crack in the root canal needle 230. As can be seen from Fig. 4, after the root canal needle 230 continues to be used for about 20 seconds at the time point B1 of the abnormal use state, the root canal needle 230 is broken at the time point B2. Therefore, according to the simulation experiment, it can be further designed that if the processing system 220 determines that the abnormal use state of the root canal needle 230 is detected, the root canal needle 230 stops operating or the processing system 220 issues a warning message. For example, the processing system 220 can control the drive device 232 to stop rotation of the root canal needle 230 or to issue a warning sound. According to the experimental result, the time interval between the time point B1 of the abnormal use state and the time point B2 at which the root canal needle 230 is broken is sufficient for the root canal needle 230 to stop rotating or the user receiving the warning message has a certain reaction. A flowchart of the method of the above simulation experiment can be seen in steps P21 to P26 of FIG.

It should be noted that, in this simulation experiment, the sensible vibration wave signal generated when the root canal needle 230 is rotationally applied to the clamp J1 is converted into a voltage signal by the operation of the optical path configuration structure PA1. The processing system 220 is enabled to determine whether the abnormal use state of the root canal needle 230 is detected based on the voltage signals. In other words, in this simulation experiment, the processing system 220 indirectly determines whether the abnormality of the root canal needle 230 is detected according to the sensible vibration wave signal generated by the clamp J1 when the root canal needle 230 rotates. status of use.

The advantage of the system 200 is that since the energy intensity of the narrow-band optical signal S12 generated by the optical signal generator 250 is large, the sensor 210, such as a fiber grating sensor, senses some microwave motion, and the light detector The 260 can receive large energy changes, which in turn increases the sensitivity of the detection.

6 is a schematic view showing the configuration of a system for detecting another abnormal experiment of the abnormal use state of the root canal. Referring to FIG. 6, the system 300 for detecting an abnormal use state of the root canal includes a sensor 310 and a processing system 320. The sensor 310 is, for example, an acoustic wave sensor, such as a microphone. A sensor 310, such as a sonic sensor, is adjacent to these jigs J2 but is not directly disposed on these jigs J2. When the root canal needle 330 is rotatably biased to the clamp J2, the sensor 310, for example, the acoustic wave sensor receives the sensible vibration sound wave signal and converts the sensible signals into voltage signals.

After the voltage signal is processed by the processing system 320 to remove noise, further filtering, and mathematical conversion (such as Fourier transform or Hilbert transform), the voltage amplitude is related to time in a specific frequency range, such as Figure 7 shows. It must be noted here that in this simulation experiment, the specific frequency range selected is 40 to 60 Hz, and the mathematical conversion is a Fourier transform. Since the root canal needle 330 rotates at 400 rpm, and the experimental root canal needle 330 has three peaks in cross section, the root canal needle 330 cuts one of the clamps J2 at a frequency of 1200 rpm. That is 20 Hz. However, the sensor 310, which is, for example, an acoustic wave sensor, can receive the vibration sound wave signals transmitted from these jigs J2, so the voltage amplitude at a frequency around 40 Hz should be more significant with respect to time. Therefore, the specific frequency range selected is 40 to 60 Hz, which is also determined by the number of peaks and the number of revolutions of the root canal 230, but the selected frequency range is not necessarily the only available frequency range. As can be seen from Fig. 7, after the root canal needle 330 continues to be used for about 10 seconds at the time point B3 of the abnormal use state, the root canal needle 330 is broken at the time point B4.

An advantage of system 300 is that its configuration is in contrast to the configuration of system 200. It's simpler and the cost is cheaper.

In summary, the method and system for detecting an abnormal use state of a medical drill member of the present invention have the following or other advantages. Because the sensor detects the sensible signal of the medical drill in use in the method and system for detecting the abnormal use state of the medical drill, the processing system can immediately determine whether to detect based on the sensible signal. Unusual use of medical drills to avoid further damage to medical drills.

The present invention may be embodied in other specific forms without departing from the spirit and scope of the invention. The aspects of the specific embodiments are to be considered as illustrative and not restrictive. Accordingly, the scope of the invention is indicated by the appended claims rather All changes that fall within the meaning and scope of the patent application are deemed to fall within the scope of the patent application.

110, 210, 310‧‧‧ sensors

120, 220, 320‧ ‧ processing system

130‧‧‧Medical drill parts

132, 232‧‧‧ drive

200, 300‧‧‧ system

230, 330‧‧‧ root canal needle

250‧‧‧Optical signal generator

251‧‧‧Doped fiber

252‧‧‧Laser light source

253‧‧‧Optical isolator

254, 270‧‧‧Optocoupler

255‧‧‧ optical filter

256‧‧ Circulator

260‧‧‧Photodetector

290‧‧‧ fiber optic

J1, J2‧‧‧ fixture

A1‧‧‧Crest

B1, B2, B3, B4‧‧‧ time points

P11, P12, P13, P14, P21, P22, P23, P24, P25, P26‧‧

PA1‧‧‧ optical path configuration structure

S12, S13, S14‧‧‧ optical signals

T1‧‧‧ medical objects

T12‧‧‧ root canal

1 is a flow chart of a method for detecting an abnormal use state of a medical drill member according to an embodiment of the invention.

2 is a schematic diagram showing a configuration relationship between a medical drill, the object to be treated, and a sensor.

FIG. 3 is a schematic diagram showing the configuration of a system for simulating a simulated experiment in which the abnormality of the root canal is used.

Figure 4 illustrates the relationship of voltage amplitude versus time over a particular frequency range.

Figure 5 is a flow chart showing the method of the simulation experiment.

Figure 6 shows another simulation experiment for detecting the abnormal use state of the root canal needle Schematic diagram of the system configuration.

Figure 7 illustrates the relationship of voltage amplitude versus time over a particular frequency range.

P11, P12, P13, P14‧‧ steps

Claims (8)

A method for detecting an abnormal use state of a medical drill member, comprising: configuring a sensor in a manner not directly disposed on the medical drill member, such that the sensing range of the sensor covers a medical object to be treated At least a portion of the optical signal generator generates a plurality of first optical signals, wherein a portion of the first optical signals is transmitted to the sensor; the sensor receives the medical drill member into the medical object to be implanted Generating a plurality of sensible signals, and converting the portions of the first optical signals into the plurality of second optical signals by the sensible signals; and receiving, by the optical detectors, the second optical signals a plurality of coupling optical signals respectively coupled to the other portion of the first optical signals; and a processing system determining whether the abnormal use state of the medical drill is detected according to the coupled optical signals. The method for detecting an abnormal use state of a medical drill member according to the first aspect of the patent application, further comprising: if the processing system determines that the abnormal use state of the medical drill member is detected, the medical drill member stops operating. . For example, in the method of claim 1, the method for detecting an abnormal use state of a medical drill member, wherein the sensible signals are vibration wave signals. The method of claim 1, wherein the sensor is an acoustic wave sensor, a fiber optic sensor, a piezoelectric sensor, or a strain sensing method. Device. For example, in the abnormal use state of the medical drill for detecting the medical item No. 1 The method further includes: the photodetector converting the coupled optical signals into a plurality of voltage signals; wherein the processing system determines whether the abnormal use state of the medical drill is detected according to the coupled optical signals The step is that the processing system determines whether the abnormal use state of the medical drill member is detected according to the voltage signals. A system for detecting an abnormal use state of a medical drill member, comprising: a sensor adapted to be configured not directly disposed in the medical drill member, such that the sensing range of the sensor covers a waiting period At least a portion of the medical object; an optical signal generator coupled to the sensor and adapted to generate a plurality of first optical signals, wherein one of the first optical signals is adapted to be transmitted to the sensor, the sense The detector is adapted to receive a plurality of sensible signals generated when the medical drill member is drilled into the object to be treated, and convert the portion of the first optical signals into a plurality of signals by the sensible signals a second optical signal; a photodetector coupled to the sensor and the optical signal generator, and adapted to receive a portion of the second optical signals respectively coupled to another portion of the first optical signals And a plurality of coupled optical signals; and a processing system coupled to the photodetector and adapted to determine whether the abnormal use state of the medical drill is detected according to the coupled optical signals. The system for detecting an abnormal use state of a medical drill member according to the sixth aspect of the patent application, wherein the sensor is an acoustic wave sensor, a fiber optic sensor, a pressure sensor or a strain sensing Device. A system for detecting an abnormal use state of a medical drill member according to claim 6 wherein the photodetector is adapted to convert the coupled optical signal into a plurality of voltage signals. No. The processing system determines whether the abnormal use state of the medical drill is detected according to the voltage signals.