CN113229980A - Interdental contact strength measuring system - Google Patents
Interdental contact strength measuring system Download PDFInfo
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- CN113229980A CN113229980A CN202110497534.XA CN202110497534A CN113229980A CN 113229980 A CN113229980 A CN 113229980A CN 202110497534 A CN202110497534 A CN 202110497534A CN 113229980 A CN113229980 A CN 113229980A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/04—Measuring instruments specially adapted for dentistry
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Abstract
The invention relates to an interdental contact strength measuring system, comprising: the device comprises an interdental contact strength measuring device, a pressure measuring connecting rod, a bearing seat, a pressure sensor and a signal processing device; the interdental contact strength measuring device is arranged at one end of the pressure measuring connecting rod and is used for collecting the interdental contact strength; the pressure sensor is arranged at the other end of the pressure measuring connecting rod and used for acquiring the pressure transmitted from one end of the pressure measuring connecting rod to the other end of the pressure measuring connecting rod; the bearing seat is arranged at a position close to the other end of the pressure measuring connecting rod and used as a rotating fulcrum of the pressure measuring connecting rod; the signal processing device is connected with the pressure sensor and used for processing the pressure signal acquired by the pressure sensor. The invention is suitable for dentists to detect the contact strength between teeth, saves time and labor, quantifies the contact strength between teeth, and is beneficial to the memory and comparison of the dentists.
Description
Technical Field
The invention relates to an oral cavity measuring device, in particular to an interdental contact strength measuring system.
Background
In the fixed restoration of the oral cavity, the adjacent surface contact relationship is not negligible to finish a restoration with good function, and the ideal adjacent surface contact is helpful to maintain the stability of the dental arch and healthy periodontal tissues. Too loose of this contact will cause food impaction, and too tight of a contact will cause tooth movement and hence bite trauma. The correct adjacent contact relationship is not only related to the size and relative position of the contact area, but also to the contact tightness between two teeth, i.e. the force (contact strength) of the material fibers to push the teeth on both sides through the contact area. The clinical examination of the adjacent surface contact relationship of the prosthesis is generally performed by using dental floss or a forming piece, and doctors judge according to hand feeling, which is a practical and simple method, but each doctor has different feeling, no specific force value and duration, and cannot record, which brings great trouble to clinical work. The existing device for measuring the contact strength between teeth consists of a stainless steel belt, a rack, a sliding bearing, a handle and other complex link mechanisms, and the matching precision of all the components brings great challenges to the machining and manufacturing process and the production and assembly; meanwhile, the interdental contact strength measuring device consisting of the connecting parts cannot meet the requirements of portability and convenience, and the long-time operation of a doctor easily causes hand fatigue, thereby seriously affecting the working efficiency and hand health of the doctor.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a system for facilitating measurement of interdental contact strength by a doctor, which is independent of judgment of the hand feeling of the doctor, can facilitate measurement by the doctor, and can quantitatively display the measurement result, thereby facilitating quantitative recognition of the interdental contact strength of the same patient by different doctors.
In order to achieve the purpose, the invention adopts the following technical scheme: an interdental contact strength measurement system, comprising: the device comprises an interdental contact strength measuring device, a pressure measuring connecting rod, a bearing seat, a pressure sensor and a signal processing device;
the interdental contact strength measuring device is arranged at one end of the pressure measuring connecting rod and is used for collecting the interdental contact strength;
the pressure sensor is arranged at the other end of the pressure measuring connecting rod and used for acquiring the pressure transmitted from one end of the pressure measuring connecting rod to the other end of the pressure measuring connecting rod;
the bearing seat is arranged at a position close to the other end of the pressure measuring connecting rod and used as a rotating fulcrum of the pressure measuring connecting rod;
the signal processing device is connected with the pressure sensor and used for processing the pressure signal acquired by the pressure sensor.
Said interdental contact strength measurement system, preferably said interdental contact strength measurement device comprises a dental floss pick and a dental floss pick connector;
the dental floss rod connector is used for connecting the dental floss rod with one end of the pressure measuring connecting rod;
the dental floss stick is used for measuring the contact strength between teeth.
The interdental contact strength measuring system, preferably, the dental floss rod is an F-shaped steel wire arch; the steel wires of the steel wire arch are embedded between adjacent tooth gaps so as to obtain the contact strength between teeth.
Preferably, the pressure sensor is arranged at one side of the cylinder surface of the pressure measuring connecting rod, and an included angle of 180 degrees is formed between the position of the pressure sensor and the stress direction of the steel wire arch.
The interdental contact strength measuring system, preferably, the bearing housing comprises a shaft, a bearing and a bearing connector;
the shaft is connected with the pressure measuring connecting rod and used as a pivot for the rotation of the pressure measuring connecting rod, and the axis of the shaft is vertical to the direction of the column axis of the pressure measuring connecting rod; the bearing receives the shaft;
the bearing connector bears the bearing.
The interdental contact strength measuring system preferably, the bearing seat is provided at a position away from one end of the pressure measuring connecting rod by a distance of four fifths of the total length of the pressure measuring connecting rod.
The system for measuring the contact strength between the teeth preferably comprises a main control module, a power management module, a pressure sensor acquisition module and a display module;
the pressure sensor acquisition module transmits acquired interdental contact strength data to the main control module;
the power management module supplies power to the main control module, the pressure sensor acquisition module and the display module;
the display module is used for displaying the interdental contact strength acquired by the pressure sensor acquisition module;
the main control module controls the power management module, the pressure sensor acquisition module and the display module to work and communicate with each other.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the structure and the manufacturing process are simple, the whole device is light and convenient to use, and the operation of a doctor is convenient;
2. the interproximal contact strength is quantitatively displayed, so that the doctor can conveniently memorize and compare the interproximal contact strength.
Drawings
FIG. 1 is a schematic view of an interproximal contact strength measurement system of the present invention;
FIG. 2 is a perspective view of the device for measuring the strength of interproximal contact according to the present invention;
FIG. 3 is a top view of the interdental contact strength measuring apparatus of the present invention;
fig. 4 is a side view of the interdental contact strength measuring apparatus of the present invention.
Reference numerals:
1 dental floss rod 2 steel wire
3 dental floss rod connector 4 pressure measuring connecting rod
5 bearing connecting piece 6 bearing
7 pressure sensor 8 signal processing device
9 Battery 10 shaft
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few 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.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used to define elements only for convenience in distinguishing between the elements, and if not otherwise stated, are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the invention adopts the following technical scheme: an interdental contact strength measurement system, comprising: the device comprises an interdental contact strength measuring device, a pressure measuring connecting rod 4, a bearing seat, a pressure sensor 7 and a signal processing device 8; the interproximal contact strength is an important index for measuring the closeness between two teeth, and before the present invention is put forward, the contact strength is measured by dentists according to hand feeling. For the same doctor, when treating the same patient or different patients, the hand feeling of the doctor is different due to the factors of environment and time, so that the hand feeling generated by different doctors when treating the same patient or even different patients is more different. If this problem is not solved, it becomes impractical to measure the strength of the interproximal contact in practice.
As shown in fig. 2 and 3, the interdental contact strength measuring device is disposed at one end of the pressure measuring connecting rod 4 for collecting the interdental contact strength; at this time, one end of the pressure measurement connecting rod 4, namely the interdental contact strength measuring device, extends into the oral cavity, and the interdental contact strength can be acquired.
The pressure sensor 7 is arranged at the other end of the pressure measuring connecting rod 4 and is used for acquiring the pressure transmitted from one end of the pressure measuring connecting rod 4 to the other end of the pressure measuring connecting rod 4; the pressure sensor 7 receives pressure data, which is obtained by the lever principle.
The bearing seat is arranged at a position close to the other end of the pressure measuring connecting rod 4 and is used as a pivot for the rotation of the pressure measuring connecting rod 4; the lever principle described above requires a fulcrum, which is provided by the bearing block.
The signal processing device 8 is connected with the pressure sensor 7 and is used for processing the pressure signal acquired by the pressure sensor 7. The pressure sensor 7 converts the pressure data into an electric signal, and the electric signal is processed by the signal processing device 8 and then displayed, so that the electric signal is converted into a format which can be read and understood by a doctor.
The signal processing device 8 is also connected with a battery 9. The battery 9 is used to supply power to the signal processing device 8.
The interdental contact strength measuring system, preferably, the interdental contact strength measuring device comprises a dental floss rod 1 and a dental floss rod connector 3;
the dental floss rod connector 3 is used for connecting the dental floss rod 1 with one end of the pressure measuring connecting rod 4; the flosser wand connector 3 and the flosser 1 are removable components. After being used by a patient A, the medical instrument can be detached. When the dental floss rod connector is used by a patient B, a new dental floss rod 1 with the dental floss rod connector 3 can be replaced, so that one dental floss rod 1 can be replaced by one person, and the aims of sanitation and cleanness are fulfilled.
The dental floss stick 1 is used for measuring the contact strength between teeth.
The interdental contact strength measuring system, preferably, the dental floss rod 1 is an F-shaped steel wire arch; the steel wire 2 of the steel wire arch is used for being embedded between adjacent tooth gaps so as to obtain the contact strength between teeth. The steel wire 2 of the steel wire bow is made of stainless steel. For example, the F-shaped steel wire arch is integrally formed with a stainless steel wire with a diameter of 0.05mm at the open end, and has a length of 15mm and an arch height of 5 mm.
The system for measuring the contact strength between teeth preferably comprises a pressure sensor 7 arranged at one side of the cylinder surface of the pressure measuring connecting rod 4, and the stress direction of the steel wire arch forms an included angle of 180 degrees. When no force measurement is performed, the pressure sensor 7 has an initial value of 0 newton. The pressure sensor 7 can be wrapped on the other end of the pressure connecting rod 4, so that the pressure sensor 7 can receive the pressure transmitted by the steel wire arch through the pressure connecting rod 4 no matter the stress direction of the steel wire arch. In the present embodiment, the pressure sensor 7 is provided at only one of two positions at the other end of the pressure measuring connection rod 4. The two positions differ depending on the position of the wire 2 in the wire bow. As shown in fig. 4, when viewed from the side of the interdental contact strength measurement system: the pressure sensor 7 is arranged at the lower side of the other end of the pressure measuring connecting rod 4 when the steel wire 2 in the steel wire arch faces to the lower position; the pressure sensor 7 is provided on the upper side of the other end of the pressure measuring connection rod 4 when the wire 2 in the wire bow is directed to the upper position. The arrangement ensures that the pressure sensor 7 can completely receive the force sensed by the steel wire.
The system for measuring the contact strength between teeth preferably comprises a shaft 10, a bearing 6 and a bearing connector 5;
the shaft 10 is connected with the pressure measuring connecting rod 4 and used as a pivot for the rotation of the pressure measuring connecting rod 4, and the axis of the shaft 10 is vertical to the direction of the column axis of the pressure measuring connecting rod 4; the bearing 6 receives the shaft 10;
the bearing connection 5 receives the bearing 6. The shaft 10 acts here as a fulcrum, and the force to which the wire 2 is subjected cannot be transmitted to the pressure sensor 7 without the shaft 10. Assuming that the horizontal distance from the center of contact of the pressure measuring connecting rod 4 and the pressure sensor 7 to the fulcrum is L2, and the horizontal distance from the contact point of the steel wire 2 and the tooth to the fulcrum is L1; when the pressure sensor 7 is located at the lower side of the other end of the pressure measuring bar 4 as viewed from the side of the system for measuring the contact strength between teeth, the pressure measuring bar 4 can rotate around the center of the two bearings 6 when the pressure measuring bar 4 is subjected to an upward force, and a downward force F2 is applied to the pressure sensor 7.
When the steel wire 2 of the steel wire arch is placed between two adjacent teeth, namely, between teeth, the steel wire 2 is subjected to an upward force F1, namely, an interdental force, according to the lever principle: f1, L1, F2, L2, and therefore F1, F2, L2/L1, it is known that the force between the teeth and the force measured by the pressure sensor 7 are in a linear relationship, with a coefficient of L2/L1;
similarly, when the pressure sensor 7 is located at the upper side of the other end of the pressure measuring connecting rod 4, and when the pressure measuring connecting rod 4 is subjected to a downward force, the pressure measuring connecting rod 4 can rotate around the centers of the two bearings 6, so as to apply an upward force F3 to the pressure sensor 7.
When the steel wire 2 of the steel wire arch is placed between two adjacent teeth, namely, between teeth, the steel wire 2 can be subjected to a downward force F4, namely, an interdental force, according to the lever principle: F4L 1 ═ F3L 2, and therefore F4 ═ F3L 2/L1, it can be seen that the interdental force and the force measured by the pressure sensor 7 are in a linear relationship, with a coefficient of L2/L1.
The interdental contact strength measuring system preferably includes a bearing seat disposed at a position away from one end of the pressure measuring connecting rod 4 by a distance of four fifths of the total length of the pressure measuring connecting rod 4. I.e., L2/L1 ═ 1/4. The position of the bearing seat, namely the position of the fulcrum is set at 1/4 of L2/L1, so that the dentist can conveniently extend one end of the pressure measuring connecting rod 4 into the oral cavity, and the accurate F2 or F3 can be obtained by applying a smaller force F1 or F4. If L2/L1 is larger than 1, the force F1 or F4 is larger, so that the precise F2 or F3 can be obtained and the gum is easy to hurt.
The system for measuring the contact strength between teeth preferably comprises a signal processing device 8, a main control module, a power management module, a pressure sensor acquisition module and a display module;
the pressure sensor acquisition module transmits acquired interdental contact strength data to the main control module; the pressure sensor acquisition module transmits acquired interdental force data to the main control module for reading, and the main control module transmits the read data to the display module for displaying; the pressure sensor acquisition module is powered by +/-5V voltage output by the +/-5V voltage boosting and reducing module, and in addition, a voltage reference value output to the outside is set through the voltage division of the 3.3V voltage reference module;
the power management module supplies power to the main control module, the pressure sensor acquisition module and the display module; the power management system comprises a battery charging module, a key detection module, a power switch module, a +/-5V buck-boost module, a 3.3V LDO module and a 3.3V voltage reference module. The battery charging module realizes the protection of battery charging and long-time overcharge, and is connected with the charging USB port; the key detection module controls the discharge of the battery and monitors the voltage of the battery through a single key switch, and the battery is powered off when the voltage of the battery is too low; the power switch module is connected with the battery and the whole circuit, the level of the key detection module is identified, and when the high level is output, the power switch is closed, so that the power supply of the battery to the whole circuit of the device is realized. The power switch module is connected with the +/-5V voltage boosting and reducing module and converts the 3.7V-4.2V voltage output by the lithium battery into +/-5V voltage; the +/-5V buck-boost module outputs high-precision 3.3V voltage and 3.3V voltage for a digital circuit through the 3.3V voltage reference module and the 3.3V LDO module respectively, and is used for supplying power for a singlechip digital circuit in the display module and the main control module. The high-precision 3.3V voltage is used for setting the reference voltage of the pressure sensor, the power supply acquired by the single chip microcomputer ADC in the main control module and the power supply of the sensor acquisition module;
the display module is used for displaying the interdental contact strength acquired by the pressure sensor acquisition module;
the main control module controls the power management module, the pressure sensor acquisition module and the display module to work and communicate with each other. The main control module is responsible for coordinating the work among all modules, wherein the main control module comprises a key switch for man-machine interaction, and when a single key switch is pressed down, the main control module starts to acquire data and sends the data to the display module; when the single-key switch is released, the main control module controls to stop collecting and sending data; and the display module displays the maximum value of the interdental force in the period from the pressing of the key switch to the releasing of the key switch.
The battery charging module is realized by a TI company BQ21040DBVR charging chip,
the BQ21040DBVR is a highly integrated lithium ion and lithium polymer linear battery charger for space-constrained portable applications, with a high input voltage range for input overvoltage protection. The charger has high-precision current and voltage regulation loop functions, charging state display and charging termination functions. A charging indicator lamp is arranged in the peripheral circuit to indicate whether power supply is completed.
STM6601CQ2BDM6F intelligent switch control chip of ST company is selected as the key detection module, which is a simplified low-power consumption intelligent button switch controller, and the power supply of the whole circuit is controlled by a single key switch. The standby current of the key detection module is only 0.6uA, and the key detection module is suitable for power supply of a lithium battery.
The power switch module selects a TI company TPS22918DBVR load switch chip which is a single-channel load switch, can configure the rise time and the fast output discharge, can operate in the input voltage range of 1V to 5.5V and can support the maximum continuous current of 2A. The switch is controlled by a level signal input.
The +/-5V voltage boosting and reducing module selects TPS65133 dual-output power supply chips of TI company, can convert 2.9-5V voltage into fixed +/-5V voltage and supplies power for the 3.3V voltage reference module, the 3.3VLDO module and the pressure sensor acquisition module.
The 3.3V voltage reference module selects a TI REF3433IDBVR voltage reference chip which is a low-temperature drift (6pp m/DEG C), low-power consumption and high-precision CMOS voltage reference, and has +/-0.05% initial precision, low running current and power consumption less than 95 mu A. The small size and low operating current (95 μ a) characteristics of the device make it well suited for portable and battery powered applications.
The 3.3V LDO module selects a TI company TPS7B6925QDBVRQ1 linear regulator (LDO), which is a low-dropout linear regulator, the quiescent current of the device under light load is only 15 muA (typical value), the device is suitable for a standby micro control unit system, and the device has integrated short circuit and overcurrent protection functions.
The display module selects a display screen of ZJY091I0400WG01 of a middle view garden electronic, which is a 0.91-inch OLED, is internally provided with an SSD1306 control chip, and is communicated with the main control chip through an I2C interface to display the measured interdental force value. The OLED display screen has the characteristic of low power consumption and is suitable for a circuit powered by a battery.
The main control module adopts STM32F051K6U6 singlechip of ST company, and the singlechip comprises high performance
MO32 bit RISC core, running at maximum 48MHz, with high speed embedded memory, and extensive enhanced peripherals and I/O ports. Analog quantity output by the sensor module is acquired through the ADC, and the ADC of the sensor module is powered by 3.3V reference voltage so as to realize high-precision voltage sampling; communicate with the display module through an I2C interface; the display module displays the maximum value of the key switch in the period of pressing and loosening when the single key switch is loosened, and the upper computer is effectively prevented from displaying redundant interdental force data.
The sensor is an LA-S4 pressure sensor of Zhongxintai, has the characteristics of small volume and high precision, has the measuring range of 0- +/-50N, and supports 5V low-voltage power supply. The sensor outputs a differential signal to an AD8427 operational amplifier of an ADI company to realize voltage amplification of 900 times, meanwhile, the amplifier is provided with a voltage reference, the voltage reference is provided by adopting the partial pressure of an OPA376A operation, amplification and voltage reference module of the TI company, then the partial pressure is output through a first-order low-pass active filter (RC filter) circuit, and finally the single-chip ADC driving is realized by the OPA376A operation, amplification and voltage reference module of the TI company. The sensor provides high-precision 5V voltage power supply through an ADI REF195 voltage reference chip, and the output precision of the interdental force value measured by the sensor is ensured. The OPA376A op amp is powered directly through the 3.3V voltage reference block.
The technical scheme well solves the problem of measuring the contact strength between teeth, and the measuring system is simple in structure. This technical scheme is based on lever principle, will measure the power conduction of interdental contact intensity and give pressure sensor to send for signal processing device through pressure sensor, show at last. The interproximal contact strength sensed by the doctor through the interproximal measuring device is displayed in a quantized mode, so that the contact strength between the teeth of the same doctor or even different doctors can be conveniently quantized, and the doctor can fully know the illness state of the patient.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. An interdental contact strength measurement system, comprising: the device comprises an interdental contact strength measuring device, a pressure measuring connecting rod (4), a bearing seat, a pressure sensor (7) and a signal processing device (8);
the interdental contact strength measuring device is arranged at one end of the pressure measuring connecting rod (4) and is used for collecting the interdental contact strength;
the pressure sensor (7) is arranged at the other end of the pressure measuring connecting rod (4) and is used for acquiring the pressure transmitted from one end of the pressure measuring connecting rod (4) to the other end of the pressure measuring connecting rod (4);
the bearing seat is arranged at a position close to the other end of the pressure measuring connecting rod (4) and is used as a rotating fulcrum of the pressure measuring connecting rod (4);
the signal processing device (8) is connected with the pressure sensor (7) and used for processing the pressure signal acquired by the pressure sensor (7).
2. The interdental contact strength measurement system according to claim 1, wherein the interdental contact strength measurement device comprises a dental floss bar (1) and a dental floss bar connector (3);
the dental floss rod connector (3) is used for connecting the dental floss rod (1) with one end of the pressure measuring connecting rod (4);
the dental floss stick (1) is used for measuring the contact strength between teeth.
3. The interdental contact strength measurement system according to claim 2, wherein the dental floss bar (1) is an F-shaped steel wire arch; the steel wire (2) of the steel wire arch is used for being embedded between adjacent teeth gaps so as to obtain the contact strength between teeth.
4. The system for measuring the contact strength between teeth as claimed in claim 3, wherein the pressure sensor (7) is arranged at one side of the column surface of the pressure-measuring connecting rod (4) and forms an included angle of 180 degrees with the force-bearing direction of the steel wire arch.
5. The interdental contact strength measurement system according to claim 1, wherein the bearing housing comprises a shaft (10), a bearing (6) and a bearing connector (5);
the shaft (10) is connected with the pressure measuring connecting rod (4) and used as a pivot of the rotation of the pressure measuring connecting rod (4), and the axis of the shaft (10) is vertical to the direction of the cylinder axis of the pressure measuring connecting rod (4); the bearing (6) bears the shaft (10);
the bearing connecting piece (5) bears the bearing (6).
6. The interdental contact strength measurement system according to claim 1 or 5, wherein the bearing seat is provided at a position which is four fifths of the total length of the pressure-measuring connecting rod (4) from one end of the pressure-measuring connecting rod (4).
7. The interdental contact strength measurement system according to claim 1, wherein the signal processing device (8) comprises a main control module, a power management module, a pressure sensor acquisition module and a display module;
the pressure sensor acquisition module transmits acquired interdental contact strength data to the main control module;
the power management module supplies power to the main control module, the pressure sensor acquisition module and the display module;
the display module is used for displaying the interdental contact strength acquired by the pressure sensor acquisition module;
the main control module controls the power management module, the pressure sensor acquisition module and the display module to work and communicate with each other.
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| CN113229980B (en) | 2022-09-27 |
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