阅读说明：本技术 一种基于恒流源的口腔种植体检测定位装置和方法 (Oral implant detection positioning device and method based on constant current source ) 是由 张倜然 郭丹 于 2020-12-29 设计创作，主要内容包括：本发明涉及一种基于恒流源的口腔种植体检测定位装置和方法,属于口腔种植体检测和定位装置技术领域；包括探测传感器、探测传感器插座和种植体定位装置,探测传感器插座两端分别连接探测传感器与种植体定位装置。所述的种植体定位装置主要包括由电源供电的CPU、恒压源模块、状态显示控制模块和变频模块。所述的恒压源模块、状态显示控制模块和变频模块与CPU连接,PCB通过探测传感器插座与CPU连接。具有高灵敏、操作方便、定位准确的特点,解决了现有方法周期长、定位不准确以及定位速度慢等问题,保证了医生快速、精准地找到种植体并实施手术,降低了医疗事故。(The invention relates to an oral implant detection and positioning device and method based on a constant current source, belonging to the technical field of oral implant detection and positioning devices; the device comprises a detection sensor, a detection sensor socket and an implant positioning device, wherein the two ends of the detection sensor socket are respectively connected with the detection sensor and the implant positioning device. The implant positioning device mainly comprises a CPU powered by a power supply, a constant voltage source module, a state display control module and a frequency conversion module. The constant voltage source module, the state display control module and the frequency conversion module are connected with the CPU, and the PCB is connected with the CPU through the detection sensor socket. The method has the characteristics of high sensitivity, convenience in operation and accuracy in positioning, solves the problems of long period, inaccuracy in positioning, low positioning speed and the like of the conventional method, ensures that a doctor can find the implant and perform the operation quickly and accurately, and reduces medical accidents.)

1. An oral implant detection and positioning device based on a constant current source is characterized by comprising a detection sensor, a detection sensor socket and an implant positioning device, wherein two ends of the detection sensor socket are respectively connected with the detection sensor and the implant positioning device;

the detection sensor consists of a PCB and copper track-shaped coils attached to the upper surface and the lower surface of the PCB;

the implant positioning device mainly comprises a CPU powered by a power supply, a constant voltage source module, a state display control module and a frequency conversion module;

one end of the detection sensor socket is used for inserting and installing the detection sensor, the other end of the detection sensor socket is used for inserting and installing the detection sensor at the front end of the implant positioning device, and the PCB is connected with a power supply through the detection sensor socket;

the constant voltage source module, the state display control module and the frequency conversion module are connected with the CPU, and the PCB is connected with the CPU through a detection sensor socket;

the frequency conversion module automatically outputs a required frequency range under the control of the CPU according to the difference of the selected frequency gears, and performs frequency conversion scanning from low to high in a set frequency range.

2. The oral implant detection and positioning device based on the constant current source as claimed in claim 1, wherein: the CPU adopts a patch type singlechip microprocessor.

3. The oral implant detection and positioning device based on the constant current source as claimed in claim 1, wherein:

the detection sensor socket rotates in the range of 0-90 degrees, 90-180 degrees and 180-270 degrees in the implant positioning device; the detection sensor socket is arranged in a jack of the implant positioning device through the insertion end;

the plug-in end of the detection sensor socket is of a cylindrical structure, and a limit boss is arranged at the 0-degree position; the outer side of the insertion end is coated with a rhombic elastic sheet, the elastic sheet is fixed in the insertion hole through a limiting step on the inner wall of the insertion hole, and the insertion hole also comprises positioning grooves for accommodating four corners of the rhombic elastic sheet; the included angle between the limiting steps is 90 degrees;

the detection sensor is of a hollow structure and is internally provided with a cable.

4. The oral implant detection and positioning device based on the constant current source as claimed in claim 1, wherein:

the state display control module is arranged at the bending position of the implant positioning device and is divided into eight areas, and red and green LED lamps are arranged in the eight areas; the display device specifically comprises a display area from 0 to 5, a first key and a second key; the circular 0 display area is arranged at the center of a circle; the periphery of the 0 display area is a ring structure formed by the first key and the second key, and the outermost periphery is a ring structure formed by the 1-5 display areas.

5. The oral implant detection and positioning device based on the constant current source as claimed in claim 1, wherein: the power supply is a battery, is arranged in a battery bin at the tail end of the implant positioning device and provides working electric energy for the detection sensor and the implant positioning device.

6. The oral implant detection and positioning device based on the constant current source as claimed in claim 5, wherein:

when the voltage of the battery is close to a critical point, the constant voltage module starts to start under the control of the CPU; the normal clinical use of the device is ensured, and the low-efficiency working time of the device is reduced; when the voltage of the battery is lower than the working threshold value, the host cannot be started, and the battery replacement is prompted.

7. The oral implant detection and positioning device based on the constant current source as claimed in claim 1, wherein:

the frequency conversion module comprises three frequency gears, wherein the high frequency gear is 8-12 MHz, the medium frequency gear is 4-8 MHz, and the low frequency gear is 0.1-4 MHz.

8. The oral implant detection and positioning device based on the constant current source as claimed in claim 1, wherein: the inner wall of the implant positioning device is also embedded with a 300um metal copper mesh shielding layer.

9. An oral implant position detection method based on a constant current source is characterized by comprising the following steps:

step 1, a battery is arranged in a battery bin of an implant positioning device, and then a detection sensor and a detection sensor socket are integrally inserted into the front end of the implant positioning device;

step 2, pressing a second key, enabling the buzzer to emit short-time beeping sounds, enabling each green light in the display areas of 0, 1, 2, 3, 4 and 5 to be on, and enabling the green lights to be off after 0.5 second; then the implant positioning device enters a self-checking state; if the self-test is failed, the red lamps in the display areas 1, 2, 3, 4 and 5 are annularly lighted, namely the five red lamps are sequentially and respectively lighted for 0.2 second, and the automatic shutdown is carried out after 1 second; if the self-test is passed, the green light in the 0, 1, 2, 3, 4 and 5 areas is always on;

step 3, after the first button is pressed, the system enters a treatment state, at the moment, green lamps in display areas of 0, 1, 2, 3, 4 and 5 are flashed, and are respectively turned on and off for 0.5 second, and the operation is carried out in a circulating manner; when the detection sensor enters the middle and weak detection areas, the green light and the red light of the 0, 1, 2, 3, 4 and 5 display areas are both bright and present orange; when the detection sensor enters a strong detection area, a green light of the area 0 is on, and the buzzer sends out two long-time beep sounds to indicate that the implant is found; after marking, the next implant is continuously searched.

10. The method for detecting the position of the oral implant based on the constant current source as claimed in claim 9, wherein the step 3 further comprises the following frequency conversion operations:

the detection sensor is deeply inserted into the oral cavity, and the detection sensor socket is rotated to facilitate detection; pressing the treatment key, namely pressing the first key; the frequency gear is in the lowest gear, then the detection sensor is moved on the tooth surface of the tooth, if the detection sensor enters the planting area, the lamps in the display areas 1, 2, 3, 4 and 5 are orange, namely, the red lamp and the green lamp are simultaneously on; then, the movement is continued, when the detection sensor is positioned at the center of the implant, the green light of the 0 display area is on, and the other lights are not on; if the implant is not detected in the whole process, the frequency gear is gradually adjusted from the medium frequency gear to the high frequency gear under the control of the CPU through the frequency conversion processing of the frequency conversion module according to the selected gear until the implant is detected.

Technical Field

The invention relates to an oral implant detection and positioning device and method based on a constant current source, and belongs to the technical field of oral implant detection and positioning devices.

Background

With the improvement of life of people, more and more patients with tooth defects and tooth loss can select to use the implant and the dental crown to recover the tooth chewing function of the oral cavity; however, after the implant is implanted into the oral cavity, the dental crown falls off once the implant is used for a long time; the wound healing and growing muscle can completely cover the implant; it is impossible to distinguish where the implant is implanted on the jaw bone by naked eyes. How to find these implant embedded in the jaw bone and covered by muscle, which is a technical problem, is going to be worn out for a long time; at present, some doctors can find the approximate position of an implant in the oral cavity by taking an X-ray picture of the oral cavity by using X-ray machine equipment; however, the detection result is often inaccurate, because the oral cavity photographed by the X-ray machine can only be scanned and imaged for the teeth with the right cross section, if the adjacent positions of the oral cavity are provided with the implant nail and the anchorage nail; or when the outer teeth are provided with the implants, the inner teeth are also provided with the implants, and the like, when a plurality of implants are arranged in the oral cavity; the photographed implant images are overlapped or deformed, and it is difficult to determine the exact position of the implant, thereby easily causing medical accidents during surgery. Therefore, how to accurately and inexhaustibly find the specific position of the implant in the oral cavity before the operation is a problem to be solved urgently.

Disclosure of Invention

The invention provides an oral implant detection and positioning device and method based on a constant current source, which have the characteristics of high sensitivity, convenience in operation and accurate positioning, solve the problems of long period, inaccurate positioning, low positioning speed and the like of the conventional method, ensure that a doctor quickly and accurately finds an implant and performs an operation, and reduce medical accidents.

The invention is realized by the following technical scheme that the device comprises a detection sensor, a detection sensor socket and an implant positioning device, wherein two ends of the detection sensor socket are respectively connected with the detection sensor and the implant positioning device.

The detection sensor consists of a PCB and copper track-shaped coils attached to the upper surface and the lower surface of the PCB; the detection sensors are of different types, namely the size of the PCB is unchanged, but the number of turns of the coils attached to the upper surface and the lower surface of the PCB can be changed, so that the requirements of different people can be met.

The implant positioning device mainly comprises a CPU powered by a power supply, a constant voltage source module, a state display control module and a frequency conversion module.

One end of the detection sensor socket is used for inserting and installing the detection sensor, the other end of the detection sensor socket is used for inserting and installing the detection sensor at the front end of the implant positioning device, and the PCB is connected with a power supply through the detection sensor socket;

the constant voltage source module, the state display control module and the frequency conversion module are connected with the CPU, and the PCB is connected with the CPU through the detection sensor socket.

The frequency conversion module automatically outputs a required frequency range under the control of the CPU according to the difference of the selected frequency gears, and performs frequency conversion scanning from low to high in a set frequency range.

The CPU adopts a patch type singlechip microprocessor. The working voltage range is 1.3V-1.5V, and the microprocessor is an ultra-low power consumption microprocessor and is directly powered by a battery.

The detection sensor socket rotates in the range of 0-90 degrees, 90-180 degrees and 180-270 degrees in the implant positioning device; the detection sensor socket is arranged in a jack of the implant positioning device through the insertion end;

the plug-in end of the detection sensor socket is of a cylindrical structure, and a limit boss is arranged at the 0-degree position; the outer side of the insertion end is coated with a rhombic elastic sheet, the elastic sheet is fixed in the insertion hole through a limiting step on the inner wall of the insertion hole, and the insertion hole also comprises positioning grooves for accommodating four corners of the rhombic elastic sheet; the included angle between the limiting steps is 90 degrees;

the detection sensor is of a hollow structure and is internally provided with a cable.

The detection sensor socket can rotate within the range of 0-270 degrees, the upper and lower jaw tooth implants can be conveniently detected, electrodes are arranged at the upper end and the lower end of the detection sensor socket, the whole device can normally work no matter the detection sensor is inserted in the positive direction or the negative direction, the detection sensor can be conveniently replaced, and time is saved. The detection sensor socket is manually adjusted to rotate around the implant positioning device, so that the detection operation is convenient to carry out.

The state display control module is arranged at the bending position of the implant positioning device and is divided into eight areas, and red and green LED lamps are arranged in the eight areas; the display device specifically comprises a display area from 0 to 5, a first key and a second key; the circular 0 display area is arranged at the center of a circle; the periphery of the 0 display area is a ring structure formed by the first key and the second key, and the outermost periphery is a ring structure formed by the 1-5 display areas.

The power supply is a battery and is arranged in a battery bin at the tail end of the implant positioning device. And working electric energy is provided for the detection sensor and the implant positioning device.

When the voltage of the battery is close to a critical point, the constant voltage module starts to start under the control of the CPU; the normal clinical use of the device is ensured, and the low-efficiency working time of the device is reduced; when the voltage of the battery is lower than the working threshold value, the host cannot be started, and the battery replacement is prompted.

The frequency conversion module comprises three frequency gears, wherein the high frequency gear is 8-12 MHz, the medium frequency gear is 4-8 MHz, and the low frequency gear is 0.1-4 MHz.

The inner wall of the implant positioning device is also embedded with a 300um metal copper mesh shielding layer. To reduce interference of external signals; the circuit part in the device also takes corresponding measures during design, a low-speed chip meeting requirements is adopted, the optical coupler device is utilized to isolate crosstalk of electric signals, and anti-interference measures are taken for parts such as a power supply, a PCB wiring part, a grounding part and an interface position, so that the whole positioning device has excellent anti-interference capability.

The invention comprises the following steps:

step 1, a battery is arranged in a battery bin of a positioning device, and then a detection sensor and a detection sensor socket are integrally inserted into the front end of an implant positioning device;

step 2, pressing a second key, enabling the buzzer to emit short-time beeping sounds, enabling each green light in the display areas of 0, 1, 2, 3, 4 and 5 to be on, and enabling the green lights to be off after 0.5 second; then the implant positioning device enters a self-checking state; if the self-test is failed, the red lamps in the display areas 1, 2, 3, 4 and 5 are annularly lighted, namely the five red lamps are sequentially and respectively lighted for 0.2 second, and the automatic shutdown is carried out after 1 second; if the self-test is passed, the green light in the 0, 1, 2, 3, 4 and 5 areas is always on;

step 3, after the first button is pressed, the system enters a treatment state, at the moment, green lamps in display areas of 0, 1, 2, 3, 4 and 5 are flashed, and are respectively turned on and off for 0.5 second, and the operation is carried out in a circulating manner; when the detection sensor enters the middle and weak detection areas, the green light and the red light of the 0, 1, 2, 3, 4 and 5 display areas are both bright and present orange; when the detection sensor enters a strong detection area, a green light of the area 0 is on, and the buzzer sends out two long-time beep sounds to indicate that the implant is found; after marking, the next implant is continuously searched. The on-off state and the combined state of the two light-emitting diodes with different colors are related to the state of the detection sensor, so that the rapid positioning is facilitated.

The step 3 further comprises the following frequency conversion operations:

the detection sensor is deeply inserted into the oral cavity, and the detection sensor socket is rotated to facilitate detection; pressing the treatment key, namely pressing the first key; the frequency gear is in the lowest gear, then the detection sensor is moved on the tooth surface of the tooth, if the detection sensor enters the planting area, the lamps in the display areas 1, 2, 3, 4 and 5 are orange, namely, the red lamp and the green lamp are simultaneously on; then, the detector is moved continuously, when the detector is positioned at the center of the implant, the green light of the 0 display area is on, and the other lights are not on; if the whole process does not detect the implant, the frequency gear is gradually adjusted from the medium-frequency gear to the high-frequency gear under the control of the single chip microcomputer microprocessor according to the selected gear through the frequency conversion processing of the frequency conversion module until the implant is detected.

The method has the advantages that (1) the measures can save energy consumption as much as possible due to different energy consumption of different frequency gears. (2) The positioning device is provided with a frequency conversion device, can automatically output a required frequency range under the control of the single chip microcomputer microprocessor according to different selected frequency gears, and can perform frequency conversion scanning from low to high in a set frequency range. (3) The metal copper mesh-shaped shielding layer is used for reducing the interference of external signals; the circuit part in the device also takes corresponding measures during design, a low-speed chip meeting requirements is adopted, the optical coupler device is utilized to isolate crosstalk of electric signals, and anti-interference measures are taken for parts such as a power supply, a PCB wiring part, a grounding part and an interface position, so that the whole positioning device has excellent anti-interference capability. (4) The detection sensors have different types and can be replaced according to the requirements of different tooth patients. (5) The on-off state and the combined state of the two light-emitting diodes with different colors are related to the state of the detection sensor, so that the rapid positioning is facilitated. (6) The sensor socket on the positioning device can be manually adjusted to rotate around the positioning device, so that the detection operation is facilitated. (7) The output of the positioning device adopts a low-frequency alternating current signal, and radiation damage to any part in the oral cavity can not be caused.

Compared with the prior art, the invention provides the handheld tooth implant positioning device which is high in sensitivity, convenient to operate and accurate in positioning, and has the following advantages: (1) low cost, high positioning accuracy and less pain for patient. (2) The operation period is short, and the waiting time of the patient for a longer time is saved. (3) The device is hand-held type structure, and the rotating head can 270 rotate, convenient to carry, flexible operation. (4) The location is accurate, has reduced medical malpractice. (5) The working frequency of the device is in a low frequency band, and the device cannot cause any radiation damage to a body in the oral cavity detection process.

Drawings

Fig. 1 is a block diagram of an implant positioning device.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic diagram of a PCB structure of the detection sensor.

FIG. 4 is a diagram of a status display control module.

Fig. 5 is a schematic view of a detection sensor socket.

Fig. 6 is a cross-sectional view of a detection sensor socket.

FIG. 7 is a flow chart of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 7 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The device comprises a detection sensor 1, a detection sensor socket 2 and an implant positioning device 3, wherein two ends of the detection sensor socket 2 are respectively connected with the detection sensor 1 and the implant positioning device 3;

the detection sensor 1 consists of a PCB and copper track-shaped coils attached to the upper surface and the lower surface of the PCB; the detection sensor 1 has different types, namely the size of the PCB is unchanged, but the number of turns of the coil attached to the upper surface and the lower surface of the detection sensor can be changed so as to meet the requirements of different people.

The detection principle is as follows: the inductance of the coil of the detecting sensor isA resistance ofEffective voltage value E and effective current valueAngular frequency ofThe equivalent eddy current inductance of the oral metal implant isA resistance ofEffective value of eddy current ofThe corresponding relation between the coil of the detection sensor and the mutual inductance of the oral metal implant is as follows:

the formula (1) and the formula (2) can be used for obtaining:

when the detection sensor 1 is close to the oral metal implant, the equivalent inductance and the equivalent resistance of the detection sensor coil are changed due to the eddy current effect, so that the purpose of the metal implant can be achieved by detecting the change of the coil voltage.

The implant positioning device 3 mainly comprises a CPU32 powered by a power supply 31, a constant voltage source module 33, a state display control module 34 and a frequency conversion module 35; the implant positioning device 3 is the core of the whole device, and has a structure of a handheld type, a length of 12 cm, a cylindrical shape and a diameter of 2 cm. The detection sensor socket 2 is bent by 30 degrees integrally at a position 2 cm away from the top end, the diameter is gradually reduced, the diameter of the port is 1.8 cm, the detection sensor interface is mounted on the port, and the detection sensor socket is of a rotary structure, can rotate within a range of 270 degrees and is convenient to operate.

Rubber bulges are embedded on the front side and the rear side of the shell of the implant positioning device 3 to increase friction force and prevent the positioning device from sliding off.

One end of the detection sensor socket 2 is used for inserting and installing the detection sensor 1, the other end of the detection sensor socket is used for being inserted at the front end of the implant positioning device 3, and the PCB is connected with the power supply 31 through the detection sensor socket 2.

The constant voltage source module 33, the state display control module 34 and the frequency conversion module 35 are connected with the CPU32, and the PCB is connected with the CPU32 through the detection sensor socket 2.

When in use, after the detection sensor 1 entering the oral cavity detects the implant, the detection electromagnetic signal is immediately converted into a level signal and transmitted to the CPU 32; the CPU32 processes and analyzes the information after receiving the detection signal, and after eliminating the interference information, confirms that the implant is detected, and drives the status display control module 34 to display the corresponding status through the power supply 31.

The frequency conversion module 35 automatically outputs the required frequency range under the control of the CPU32 according to the different selected frequency steps, and performs frequency conversion scanning from low to high within the set frequency range.

The CPU32 adopts a patch type singlechip microprocessor. The working voltage range is 1.3V-1.5V, and the microprocessor is an ultra-low power consumption microprocessor and is directly powered by a battery.

The detection sensor socket 2 rotates in the range of 0-90 degrees, 90-180 degrees, 180-270 degrees in the implant positioning device 3; the detection sensor socket 2 is arranged in the jack 36 of the implant positioning device 3 through the plug-in end 21;

the plug-in end 21 of the detection sensor socket 2 is of a cylindrical structure, and a limit boss 22 is arranged at the 0-degree position; the outer side of the inserting end 21 is coated with a rhombic spring piece 23, the spring piece 23 is fixed in the inserting hole 36 through a limiting step 361 on the inner wall of the inserting hole 36, and the inserting hole 36 further comprises positioning grooves 362 for accommodating four corners of the rhombic spring piece 23; the included angle between the 361 steps of the limiting platform is 90 degrees;

the detection sensor socket 2 is of a hollow structure, and a cable 24 is arranged in the detection sensor socket.

The detection sensor socket 2 can rotate in the range of 0-270 degrees, the detection of the upper and lower jaw tooth implants is facilitated, electrodes are arranged at the upper end and the lower end of the detection sensor socket 2, the whole device can normally work no matter the detection sensor socket 2 is inserted in the positive direction or in the reverse direction, the detection sensor socket 2 is convenient to replace, and the time is saved.

The state display control module 34 is arranged at the bending position of the implant positioning device, the state display control module 34 is divided into eight areas, and red and green LED lamps are arranged in the eight areas; specifically, the display area 343, the first button 341 and the second button 342 are 0 to 5; the circular 0 display area is arranged at the center of a circle; the periphery of the 0 display area is a ring structure formed by a first key 341 and a second key 342, and the outermost periphery is a ring structure formed by 1 to 5 display areas;

the power source 31 is a battery and is arranged in a battery compartment at the tail end of the implant positioning device 3. Supplying operating power to the detection sensor 1 and the implant positioning device 3.

When the battery voltage approaches a critical point, the constant voltage source module 33 starts the constant voltage module circuit under the control of the CPU 32; the normal clinical use of the device is ensured, and the low-efficiency working time of the device is reduced; when the voltage of the battery is lower than the working threshold value, the host cannot be started, and the battery replacement is prompted. Compared with the existing method for positioning the implant by adopting X-ray oral scanning imaging, the device is more convenient and faster, and has no radiation damage to the human body.

The frequency conversion module 35 comprises three frequency gears, wherein the high frequency gear is 8-12 MHz, the medium frequency gear is 4-8 MHz, and the low frequency gear is 0.1-4 MHz.

The inner wall of the implant positioning device 3 is also embedded with a 300um metal copper mesh shielding layer. To reduce interference of external signals; corresponding measures are also taken when the circuit part in the implant positioning device 3 is designed, a low-speed chip meeting requirements is adopted, crosstalk of electric signals is isolated by using an optical coupler, and anti-interference measures are taken for parts such as a power supply, a PCB wiring part, a grounding part and an interface position, so that the whole positioning device has excellent anti-interference capability.

The invention comprises the following steps:

step 1, a section of AA battery is arranged in a battery bin of an implant positioning device 3, and then a detection sensor 1 and a detection sensor socket 2 are integrally inserted into the front end of the implant positioning device 3;

step 2, pressing a second button 342, enabling the buzzer to emit short-time beeping sound, enabling each green light in a display area 343 of 0, 1, 2, 3, 4, 5 to be on, and enabling the green lights to be off after 0.5 second; then the implant positioning device 3 enters a self-checking state; if the self-test is failed, the red lamps in the display areas 343 of 1, 2, 3, 4 and 5 are in ring-motion light emission, namely, the five red lamps are sequentially and respectively lighted for 0.2 second, and after 1 second, the automatic shutdown is carried out; if the self-test is passed, the green light of the display area 343 of 0, 1, 2, 3, 4, 5 is always on;

step 3, after the first key 341 is pressed, the system enters a treatment state, at this time, the green light of the display area 343 of 0, 1, 2, 3, 4, 5 flashes, and turns on and off for 0.5 seconds respectively, and the process is carried out in a circulating way; when the detection sensor 1 enters the middle and weak detection areas, the green light and the red light of the display area 343 of 0, 1, 2, 3, 4, 5 are both on and appear orange; when the detection sensor 1 enters a strong detection area, a green light of a display area 0 is on, and a buzzer sends out two long-time beep sounds to indicate that the implant is found; after marking, the next implant is continuously searched.

The step 3 further comprises the following frequency conversion operations:

the detection sensor 1 is deeply inserted into the oral cavity, and the detection sensor socket 2 is rotated to facilitate detection; pressing the treatment key, namely pressing a first key 341; the frequency gear is in the lowest gear, then the detection sensor 1 is moved on the tooth surface of the tooth, if the detection sensor 1 enters the planting area, the lamps of the display areas 343 of 1, 2, 3, 4 and 5 are orange at the moment, namely, the red lamp and the green lamp are simultaneously on; then, the movement is continued, when the detection sensor 1 is positioned at the center of the implant, the green light of the display area 0 is on, and the other lights are not on; if no implant is detected in the whole process, the frequency shift is gradually adjusted from the medium frequency shift to the high frequency shift under the control of the CPU32 through the frequency conversion processing of the frequency conversion module 35 according to the selected shift until the implant is detected.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.