JP4811645B2 - Medical angle detector - Google Patents

Description

The present invention dentistry, with respect to the angle detector employed in the medical field, such as orthopedics.

  In the medical field, the angle may be measured for various purposes. For example, in the dental field, in order to form the abutment tooth in an appropriate shape, it is necessary to accurately grasp the cutting angle of the tooth. The abutment tooth is a tooth on both sides of the extracted tooth that serves as a foundation for forming a bridge that supplements the extracted tooth. For example, when the crown C shown in FIG. 1 (a) or the bridge B shown in FIG. 1 (b) is put into teeth, the shaft surface of the abutment tooth S is ideally tapered by 6 ° as shown in FIG. Need to form. In reality, since it is difficult to measure such an accurate angle, the angle is visually determined to be about 10 to 20 °. However, when many teeth are connected by the bridge B, it is necessary to keep all the teeth parallel to each other, and it is difficult to confirm only by visual observation. It can happen.

  In addition to parallel measurement of the abutment tooth axis surface in the crown and bridge and confirmation of the forming direction, there are many uses that require an angle for dental treatment. For example, during implant treatment, as shown in FIG. 3, an implant cavity is formed for drilling into a bone and implanting the implant. In this case as well, the direction of formation is important, and an accurate angle is required. 3A is a schematic cross-sectional view showing an implant cavity, and FIG. 3B is a perspective view showing a state in which the implant cavity is formed. On the other hand, during denture treatment, the occlusal plane (solid line) is parallel with reference to the straight line from the ear to the nose as viewed from the side of the patient as shown in FIG. 4 (a) (indicated by the alternate long and short dash line in FIG. 4 (a)). As shown in FIG. 4B, the straight line passing through both eyes as viewed from the front of the patient (shown by the alternate long and short dash line in FIG. 4B) and the occlusal plane (solid line) are adjusted to be parallel to each other. There is a need to. Furthermore, as shown in FIG. 5, it is also necessary to measure the jaw movement (tilt).

Furthermore, not only in dentistry but also in fields such as orthopedics and rehabilitation, the angle of bending of elbow joints and knee joints and the inclination from the body axis may be measured. For example, as shown in FIG. 6, body distortion is determined with reference to a straight line passing through both shoulders. In such a case, since it is troublesome to make an objective and accurate measurement, conventionally, it has often relied on visual measurement, and as a result, individual differences among doctors in charge may occur or it may become inaccurate. .
JP 2003-329748 A

The present invention has been made in view of such a situation. A main object of the present invention is to provide a medical angle detector capable of measuring a tilt easily and accurately.

  In order to achieve the above object, a first medical angle detector of the present invention includes a magnetic impedance element capable of detecting a change in geomagnetism and detecting an inclination angle, a main body portion including the magnetic impedance element, and a main body. And a mounting means for mounting the unit on the medical instrument in a predetermined posture, and the main body unit can define a reference axis for angle detection of the magneto-impedance element. As a result, the tilt angle can be accurately detected in various medical applications. Further, positioning when mounting the medical angle detector on the medical instrument can be easily and reliably performed by matching the axis of the main body.

  In the second medical angle detector of the present invention, the main body is formed in a substantially rectangular parallelepiped shape, and the sides constituting the rectangular parallelepiped and the axis serving as a reference for detecting the angle of the magnetic impedance element are defined. is doing. As a result, the reference position can be determined by the outer shape of the rectangular parallelepiped main body, so that alignment can be easily performed.

  Furthermore, the third medical angle detector of the present invention has a single-axis measurement mode capable of detecting a single-axis angle, a two-axis measurement mode capable of detecting a two-axis angle, and continuous angles as operation modes. A tracking mode capable of detecting and outputting a change, and a memory reading mode capable of confirming a history of recorded detection angles are provided, and any one of the operation modes can be selected by the input means. Thereby, it can be used by switching the operation mode according to the application.

  Furthermore, the fourth medical angle detector of the present invention further includes an input unit for setting a predetermined allowable angle in advance, and a detection angle detected by the magneto-impedance element is set at the input unit. Warning means for issuing a warning when the angle is exceeded. As a result, when the angle is measured, the user is warned when the angle exceeds a predetermined angle, thereby providing an environment that is easy to operate.

  Furthermore, in the fifth medical angle detector of the present invention, the mounting means is configured in a hollow cylindrical shape that can be mounted on a cylindrical portion of a tooth or bone cutting device, and the magneto-impedance element includes a cutting tool. The angle of the apparatus can be continuously measured. As a result, angle measurement can be easily performed especially in dental use, for example, at the time of tooth formation, and accurate dental restoration treatment is possible.

  Furthermore, the sixth medical angle detector of the present invention can be configured such that the detected angle detected by the magneto-impedance element can be displayed numerically on an externally connected display unit.

  Furthermore, a seventh medical angle detector of the present invention is a medical angle detector including a magnetic impedance element capable of detecting a tilt angle by detecting a change in geomagnetism, and detecting a change in geomagnetism. A magnetic impedance element capable of detecting an inclination angle and a main body portion including the magnetic impedance element are provided, and the main body portion can define an axis serving as a reference for angle detection of the magnetic impedance element. As a result, the tilt angle can be accurately detected in various medical applications.

According to the medical angle detector of the present invention as described above, the accurately detectable tilt angle in various medical applications.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments shown below are intended to illustrate the medical angle detector for embodying the technical idea of the present invention, the present invention does not specify a medical angle detector to the following. Moreover, the member shown by the claim is not what specifies the member of embodiment. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.

  In this specification, a medical angle detector, a medical angle detector operating method, a medical angle detector operating program, a computer-readable recording medium, and a stored device are used for operations related to angle detection of a medical angle detector. It is not limited to a system and a method for performing display / setting, the input / output, display, calculation, communication and other processes related to the operation, display, and setting of the medical angle detector in hardware. . An apparatus and method for realizing processing by software are also included in the scope of the present invention. For example, the angle detection itself of a medical angle detector by incorporating software, programs, plug-ins, objects, libraries, applets, scriptlets, compilers, modules, macros that operate on specific programs, etc. into general-purpose circuits or computers, or General-purpose or dedicated computers, workstations, information terminals, portable electronic devices and other electronic devices capable of processing related thereto are also used in the medical angle detector, medical angle detector operating method, and medical use of the present invention. It is included in at least one of an angle detector operation program, a computer-readable recording medium, and a stored device. In addition, this program is not limited to the one used alone, but is provided as a service in an environment that functions as a part of a specific computer program, software, service, etc., an aspect that is called and functions when necessary, and an environment such as an OS. It can also be used as a mode, a mode that operates resident in the environment, a mode that operates in the background, and other support programs.

  Also, information terminals such as computers used in the embodiments of the present invention, servers, computers connected to these, computers for operation, control, input / output, display, various processing, etc., or other peripheral devices such as printers For example, IEEE1394, RS-232x, RS-422, USB, etc., serial connection, parallel connection, or 10BASE-T, 100BASE-TX, 1000BASE-T, etc. It can be performed. The connection is not limited to a physical connection using a wire, but may be a wireless connection using radio waves such as IEEE802.1x, OFDM, etc., Bluetooth (registered trademark), infrared rays, optical communication, or the like. Furthermore, a memory card, a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like can be used as a recording medium for exchanging data or storing settings.

In the following example, an example in which a medical angle detector is mounted on a dental micromotor or turbine as a medical instrument will be described. However, the present invention is not limited to dental use and can be applied to other medical instruments. is there.
(Embodiment 1)
(Block Diagram)

7 is a perspective view of the medical angle detector according to the first embodiment of the present invention, FIG. 8 is a perspective view showing a state in which the medical angle detector is mounted on the dental micromotor M, and FIG. Block diagrams of this medical angle detector are shown respectively. The medical angle detector 100 shown in these drawings includes a magneto-impedance element 10, a main body 20, and a mounting means 30. The medical angle detector 100 is connected to the computer 40 as an external device, outputs detected angle information to the computer 40, and displays a measurement result on a display unit 50 such as a display connected to the computer 40. . As will be described later, a medical angle detector operation program is installed in the computer 40 and can be operated by an input device constituting the input means 60. The input means 60 is connected to the computer 40 by wire or wireless, or is fixed to the computer 40. Examples of general input means include various pointing devices such as a mouse, keyboard, slide pad, track point, tablet, joystick, console, jog dial, digitizer, light pen, numeric keypad, touch pad, and accu point. Further, these input means are not limited to the operation of the medical angle detector operation program, but can also be used for the operation of hardware such as a medical angle detector. Furthermore, using a touch screen or touch panel on the display itself that displays the interface screen, the user can directly input and operate the screen by hand, or use voice input or other existing input means, Or these can also be used together.
(Magnetic impedance element 10)

The magneto-impedance element 10 is an element that can detect a tilt angle by detecting a change in geomagnetism. As the magneto-impedance element 10, the present inventor can use the MI sensor previously developed. For example, the technique disclosed in Patent Document 1 can be applied to an electronic compass using an MI sensor. As shown in FIG. 10, this electronic compass detects an external magnetic field, and is a first composed of an amorphous wire having a diameter of 30 μm arranged to detect a first axis component and a second axis component of the external magnetic field. A first MI element 11 and a second MI element 12 having an inner diameter of 200 μm wound around an insulating material around each of the magnetic sensitive body and the second magnetic sensitive body; an oscillating means for supplying a pulse current or a high frequency current; Switch means for alternately energizing the one MI element 11 and the second MI element 12, detection means for detecting an output voltage between the terminals of the first MI element 11 and the second MI element 12, and the detection means The amplifier has an amplifier for amplifying the output voltage. In the example of FIG. 10, the oscillating means, the switch means, the detecting means, and the amplifier are configured by an integrated circuit 13. This makes it possible to realize an electronic compass that is ultra-compact, thin, low power consumption, and has a wide magnetic measurement range, and angle detection is possible.
(Single axis display)

The magneto-impedance element 10 can measure 1 to 6 axes. Depending on the measurement axis, the measurable range may be limited, so that a wide range of measurements can be performed using a plurality of axes. FIG. 11 shows an example of uniaxial display. In this example, the angle of the inclined surface can be measured with reference to the vertical surface as shown in FIG. 11A, or the angle at which the extension lines of the tapered side surfaces intersect as shown in FIG. 11B can be detected. FIG.11 (c) shows the example of a display of a measurement result. In this example, as the measurement result of FIG. 11A, the detection angle is displayed numerically, the vertical line which is the reference plane is indicated by a solid line, and the measurement plane is indicated by a wavy line to visually grasp the state of inclination. it can.
(2-axis display)

On the other hand, an example of biaxial display is shown in FIG. FIG. 12A shows tooth pitching and rolling as measurement objects, and FIG. 12B shows a display example of measurement results. In the example of FIG. 12B, as a measurement result, the pitching angle and the rolling angle are indicated by numerical values, and the pitching angle and the rolling angle with respect to the reference plane are indicated by a wavy line and a thick line, respectively.
(Angle detection execution timing)

In addition to detecting the angle at a predetermined timing, the angle can be detected in a tracking mode in which continuously detected values are displayed in real time. In the tracking mode, an angle, a warning sound, etc. are displayed on the screen in real time. As for the angle detection timing, for example, an external trigger is input from an external device such as the computer 40 to the medical angle detector, angle detection is executed at the timing when the trigger signal is input, and the angle is output to the outside. In place of an external trigger, a detection execution button, a foot switch, or the like can be connected to a medical angle detector, and angle detection can be executed at the timing when these buttons or switches are operated.
(Main body 20)

The main body 20 is a member having an outer shape including members such as the magnetic impedance element 10. For example, the main body 20 can be a package in which the magnetic impedance element 10 is enclosed. The main body 20 preferably defines a reference axis for angle detection of the magneto-impedance element 10. For example, the outer shape is formed in a rectangular parallelepiped shape, and the sides constituting the rectangular parallelepiped and the axis serving as a reference for detecting the angle of the magnetic impedance element 10 can be defined. Or the structure which displays the axis | shaft used as a reference | standard, such as marking an axis | shaft, on the surface of the main-body part 20 is also employable. As a result, the reference position can be determined by the outer shape of the rectangular parallelepiped main body 20, so that the positioning can be easily performed.
(Mounting means 30)

The attachment means 30 is a member for attaching the main body 20 to a medical instrument in a predetermined posture, and various configurations are possible depending on the shape of the medical instrument to be attached. In the example of FIG. 8, the mounting means 30 is configured in a hollow cylindrical shape that can be mounted on a cylindrical portion of a tooth cutting device. A cylindrical medical device is inserted into the hollow cylindrical mounting means 30 and fixed with a fastening member such as a screw, or the hollow cylindrical mounting means 30 is divided into semicircular shapes, between the semicircular inner surfaces. For example, a configuration in which a cylindrical medical device is sandwiched and fixed can be employed. Thereby, it can be easily attached to and detached from the cylindrical medical instrument. Moreover, if it is a prismatic medical instrument, it can also be set as an L-shaped mounting means. Further, a detachable structure such as a hook-like locking structure, a screw, a magnet, a belt, a buckle, or a hook-and-loop fastener can be used as appropriate. Furthermore, without attaching the main body part 20 to a medical instrument or the like, it is possible to measure the inclination of the face or the joint by directly pressing it against the patient. In this case, the mounting means 30 can be dispensed with.
(Medical angle detector operation program)

In the configuration of FIG. 9, a medical angle detector operation program is installed in a computer 40 externally connected to the medical angle detector 100 mounted on the medical instrument, and the angle detected by the medical angle detector 100 is calculated. Obtained by this medical angle detector operation program and displayed on the display unit 50. In this way, a medical angle detector operating program can be installed in a general-purpose or dedicated computer 40 to realize a medical angle detection system in terms of software.
(Warning function)

  Furthermore, the medical angle detector can be provided with a warning function in which an angle range is set in advance by the input means 60 and a warning is issued by the warning means 70 when the range is exceeded. For example, in the crown forming operation, an angle of 6 ° to 20 ° is set as the allowable range with the input means 60, and a warning is given when the angle detected by the magnetic impedance element 10 is 6 ° or less, or 20 ° or more. , The operator can be informed that the angle is abnormal, and necessary corrections can be made. As a result, when the angle is measured, the user is warned when the angle exceeds a predetermined angle, thereby providing an environment that is easy to operate.

  This warning function can be suitably used particularly when the angle is detected in real time in the tracking mode. For example, the tracking mode is executed during the crown forming operation, the angle is displayed in real time, and when the angle exceeds the set range, a warning is issued to notify the user, so that the user is prompted to correct the operation and promptly Therefore, the necessary processing can be taken, so that erroneous formation can be avoided and the operation can be performed safely and efficiently.

Hereinafter, an example in which the input unit 60 and the warning unit 70 are implemented by software as shown in FIG. 9 will be described. However, it goes without saying that the input means and the warning means can be configured by dedicated hardware.
(Warning means 70)

  The input means 60 is a member for setting a predetermined allowable angle. In this example, the input means 60 is set by operating the input means 60 on a medical angle detector operation program installed in the computer 40.

  The warning means 70 issues a warning when the detected angle detected by the magnetic impedance element 10 exceeds the allowable angle set by the input means 60. For the warning, for example, it is possible to use a configuration such as generating a warning sound, announcing “the angle is too large” by voice guidance, or displaying a warning message on the display unit 50.

  It is also possible to give a two-stage warning. For example, by setting the first warning range and the second warning range with the input means 60 and changing the warning when exceeding the first warning range and the warning when exceeding the second warning range, how much It is possible to make an operator distinguish whether a warning is issued at a level.

  With the above configuration, the magneto-impedance element 10 can continuously measure the angle of the cutting device, and the result is displayed on the display unit 50. When the predetermined angle is exceeded, the warning means 70 issues a warning.

The warning means 70 is realized by the computer 40 externally connected to the main body 20 in the example of FIG. 9, but the warning means 70 can also be incorporated in the main body. For example, a warning output can be performed via the output terminal of the warning means 70 by integrating a control means such as an IC into the main body.
(action mode)

This medical angle detector has a uniaxial measurement mode, a biaxial measurement mode, a tracking mode, and a memory read mode as operation modes, and any one of the operation modes can be selected from the input means 60. The 1-axis measurement mode and the 2-axis measurement mode are operation modes in which an angle is detected and output at a designated timing. In the 1-axis measurement mode, only the angle of 1 axis is detected, and in the 2-axis measurement mode, the angle of 2 axes is detected simultaneously. The number of axes that can be detected can be three or more, and depends on the detection capability of the magnetic impedance element 10. The tracking mode is an operation mode for continuously measuring the angle change. Further, the memory read mode is an operation mode in which stored data is read and redisplayed, such as confirming a history of recorded detection angles.
(how to use)

  This medical angle detector can be used, for example, for checking the angle of an axial surface when it is mounted on a dental micromotor M and a separate tooth such as a crown or bridge is formed as shown in FIG. In this case, a measurement mode with a single measurement direction or a tracking mode can be used.

It can also be used when working directly on the patient, such as when implanting or drilling into bone. In this case, a measurement mode in which the measurement direction is biaxial or a tracking mode can be used. In particular, when working directly on the patient's body, it is difficult to accurately detect the posture and angle, and it is necessary to rely on visual inspection, resulting in individual differences between doctors and workers. It was difficult to obtain uniform and objective results. On the other hand, by applying the first embodiment, the inclination angle can be easily confirmed by a numerical value, so that an accurate and uniform work result can be obtained on an objective basis regardless of the operator.
(flowchart)

Next, the procedure for angle detection by the medical angle detector will be described based on the flowchart shown in FIG. First, in step S1, an operation mode of operation is selected. Here, as the operation mode, one of the one-axis measurement mode, the two-axis measurement mode, the tracking mode, and the memory read mode is selected from the input unit 60.
(Single axis measurement mode)

When the single-axis measurement mode is selected in step S1, the process proceeds to step S101 and a reference position is input. Here, a surface to be a measurement reference, for example, a horizontal surface or a vertical surface is designated from the input means 60. In step S102, the angle is measured, and an output such as displaying the detected angle on the display unit 50 as necessary is performed. In step S103, an interrupt instruction is determined. The interrupt command is issued when the current measurement value is saved during measurement or when the reference position is input again. In response to the interrupt command, the process proceeds to step S104, the measured angle is stored in a storage unit such as a memory, and the process returns to step S102 to repeat the angle detection operation. Alternatively, in response to the interrupt command, the process is stopped and the process returns to step S101 to input the reference plane again.
(2-axis measurement mode)

On the other hand, when the biaxial measurement mode is selected in step S1, the process proceeds to step S201, and the reference position is input. Since two-axis measurement mode is used here, two reference positions are also designated. In step S202, the angle is detected, and the detected angle is displayed on the display unit 50 as necessary. The process further proceeds to step S203 to determine an interrupt command, and the process proceeds to step S204 according to the interrupt command. After the measured angle is stored in a storage unit such as a memory, the process returns to step S202 and the angle detection operation is repeated. Alternatively, in response to the interrupt command, the process is stopped and the process returns to step S201 to input the reference plane again.
(Tracking mode)

On the other hand, if the tracking mode is selected in step S1, the process proceeds to step S301, and an allowable range is input from the input means 60. For example, in the case of crown creation, a taper angle range of 6 ° to 20 ° is specified. In step S302, the reference position is input from the input unit 60. Further, in step S303, it is determined whether or not to start tracking. If not, this step is repeated. If the execution is started, the process proceeds to step S304 to start tracking. In step S304, the angle is measured in real time, the angle is displayed as necessary, and the warning means 70 executes a warning operation. In the warning operation, the warning means 70 monitors whether or not the detection angle is within the set range, and outputs a warning sound according to this. Thus, the user can determine from the warning sound that the angle has exceeded a predetermined range during the creation of the crown. For example, if the angle range is in the range of 6 ° to 20 °, the sound is silenced. If the angle range is 0 ° to 6 °, or more than 20 °, the first warning sound indicating that the angle is out of the range is generated. . Further, when the angle is 0 ° or less, that is, the direction of the taper is reversed, a second warning sound is emitted to notify the user of a serious abnormality. In this way, by changing the warning sound according to the angle range, the user can determine the seriousness of the warning from the warning sound. Similarly to the above, an interrupt instruction is determined in step S305, and the process returns to steps S304 and S301 according to the interrupt instruction.
(Memory read mode)

On the other hand, when the memory reading mode is selected, the history of detection angles stored in the storage unit is called up and displayed on the display unit 50.
(Embodiment 2)

  As described above, it is possible to add an angle detection function while using an existing medical instrument by adopting a configuration that can be attached to the medical instrument by the mounting means, so that an accurate angle detection can be performed using the existing instrument. Functions can be provided at low cost.

  However, the present invention is not limited to an example using such mounting means, and a medical angle detector in a form in which an angle detection function is built into a medical instrument from the beginning can also be used. FIG. 15 shows a block diagram of a medical angle detector as a second embodiment of the present invention, in which the medical angle detector is incorporated into a medical instrument and integrated. The medical angle detector shown in this figure includes a magneto-impedance element 10, a control unit 22, and an interface unit 24. Since the magneto-impedance element 10 can adopt the same configuration as that of the first embodiment, detailed description thereof is omitted. The control means 22 inputs the angle detected by the magneto-impedance element 10, outputs it through the interface unit 24, and outputs a warning output when exceeding a preset angle range as necessary. It also functions as the means 70. Such a control means 22 can be realized by an ASIC such as an FPGA. The interface unit 24 constitutes an interface for outputting the output signal of the control means 22 to the outside. For example, an electrical signal such as a cable connected to the interface unit 24 is used for necessary processing such as connecting to an external device to display on a display or storing data.

  Further, the connection form is not limited to wired communication, and wireless communication using RF, infrared communication, or the like can be used.

  The medical angle detector, the medical angle detector operating method, the medical angle detector operating program, the computer-readable recording medium, and the stored device according to the present invention can be used for confirmation of a forming angle at the time of tooth drilling, etc. It can use suitably for a use. Moreover, it can utilize suitably for the use which needs to detect an angle continuously not only in this.

FIG. 1A is a perspective view showing a crown of a tooth, and FIG. 1B is a perspective view showing a bridge. It is sectional drawing which shows the angle of the axial surface of an abutment tooth, and a taper surface. It is explanatory drawing which shows a mode that the implant cavity which implants an implant is formed. It is the side view explaining a mode that a patient's occlusal plane was confirmed. It is the side view explaining a mode that the inclination of a jaw is confirmed. It is a figure explaining a mode that distortion of a body is measured. It is a perspective view which shows the medical angle detector which concerns on Embodiment 1 of this invention. It is a perspective view which shows the state which mounted | wore the dental micromotor with the medical angle detector of FIG. It is a block diagram of the medical angle detector of FIG. It is a top view which shows the electronic compass using a magneto-impedance element. FIGS. 11A and 11B are diagrams for explaining uniaxial display, FIGS. 11A and 11B are diagrams for explaining an inclination angle between a reference surface and an inclined surface, and FIG. 11C is a diagram showing a display example of a measurement result. It is. FIG. 12A is a diagram illustrating biaxial display, FIG. 12A is a diagram illustrating pitching and rolling, and FIG. 12B is a diagram illustrating a display example of measurement results. It is a perspective view which shows the example which utilizes the medical angle detector which concerns on Embodiment 1 for the angle check of the axial surface of a crown. It is a flowchart which shows the procedure which performs angle detection with a medical angle detector. It is a block diagram which shows the medical angle detector which concerns on Embodiment 2 of this invention.

DESCRIPTION OF SYMBOLS 100 ... Medical angle detector 10 ... Magnetic impedance element 11 ... 1st MI element 12 ... 2nd MI element 13 ... Integrated circuit 20 ... Main-body part 22 ... Control means 24 ... Interface part 30 ... Mounting means 40 ... Computer 50 ... Display Unit 60 ... Input means 70 ... Warning means C ... Crown B ... Bridge S ... Abutment tooth M ... Dental micromotor

Claims (7)

A magneto-impedance element capable of detecting a tilt angle by detecting a change in geomagnetism,
A main body including the magneto-impedance element;
An attachment means for attaching the main body to a medical instrument in a predetermined posture;
The medical angle detector, wherein the main body defines a reference axis for angle detection of the magneto-impedance element. The medical angle detector according to claim 1,
The medical angle detector, wherein the main body portion is formed in a substantially rectangular parallelepiped shape, and defines a side constituting the rectangular parallelepiped and a reference axis for angle detection of the magnetic impedance element. . The medical angle detector according to claim 1 or 2,
As operation modes, a single-axis measurement mode that can detect the angle of one axis, a two-axis measurement mode that can detect the angle of two axes, a tracking mode that can detect and output angle changes continuously, and a recorded detection A medical angle detector comprising a memory read mode capable of confirming an angle history. The medical angle detector according to any one of claims 1 to 3, further comprising:
Input means for setting a predetermined allowable angle in advance;
A medical angle detector, comprising: warning means for issuing a warning when a detection angle detected by the magnetic impedance element exceeds an allowable angle set by the input means. The medical angle detector according to any one of claims 1 to 4,
The mounting means is configured in a hollow cylindrical shape that can be mounted on a cylindrical portion of a tooth or bone cutting device,
The medical impedance detector, wherein the magneto-impedance element is configured to continuously measure the angle of the cutting device. The medical angle detector according to any one of claims 1 to 5,
A medical angle detector, wherein a detection angle detected by the magneto-impedance element can be displayed numerically on an externally connected display unit. A medical angle detector comprising a magneto-impedance element capable of detecting a tilt angle by detecting a change in geomagnetism,
A magneto-impedance element capable of detecting a tilt angle by detecting a change in geomagnetism,
A main body including the magneto-impedance element;
With
The medical angle detector, wherein the main body defines a reference axis for angle detection of the magneto-impedance element.