JP2015188484A - Dental occlusal force measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-use dental occlusal force measuring apparatus capable of measuring an occlusal force with low dental burden in biting.SOLUTION: A dental occlusal force measuring apparatus includes a measuring device and an occlusal force meter. The occlusal force meter includes a protective cover covering an occlusal force meter body. The occlusal force meter body includes a sensor substrate that is provided with connection terminals and a ground terminal at one end and a circular pressure sensing part at the other end, the connection terminals and the pressure sensing part being connected with an electrode wire, the sensor substrate being laminated with a resin sheet. The occlusal force meter body further includes a shield film layered on both sides of the resin-laminated sensor substrate, the shield film being connected to the ground terminal provided between the connection terminals. The pressure sensing part is layered with a circular protection plate. The shield film is layered on its outer surface with a reinforcing plate. The occlusal force meter body is integrated with a socket of a connection code with a heat shrinkable cover. When the occlusal force meter is used, it is preferable to use a detachable disposable cover.

Description

  The present invention relates to a dental occlusal force measuring device performed in a dental field.

  Occlusal force at the time of mastication is closely related to human health, and measuring occlusal force is important not only for treatment of local sites but also for comprehensive treatment considering biting .

  By the way, it is supposed that the occlusal force is generally measured as a force of biting with the molar No. 6. As such an occlusal force meter, an occlusal force meter disclosed in Japanese Patent Laid-Open No. 08-252245 and an occlusal force meter disclosed in Japanese Patent Laid-Open No. 09-66048 are known.

  Each of the occlusal force meters includes an occlusal force detection unit that detects occlusal force and a main body unit that displays a measurement value, and the occlusal force detection unit includes a pressure transmission unit that encloses a pressure medium liquid therein. By providing diaphragms on the upper and lower surfaces of a part of the pressure transmission part, a bite part is provided, and a pressure detector is provided at the other end of the pressure transmission part to transmit the occlusal force acting on the occlusal part. It is configured to be added to the pressure detector via a liquid.

Japanese Patent Laid-Open No. 08-252245 Japanese Patent Laid-Open No. 09-66048

  In the above-described occlusal force meter, the occlusal force can be accurately measured by the action of the pressure detector. However, since the pressure medium liquid is enclosed inside the occlusal force, the thickness cannot be reduced and the thickness is reduced. There is a problem that the measurer is inferior in use when biting into the mouth during measurement.

  When the thickness of the pressure detection unit as the measurement unit increases, accurate meshing cannot be measured. Therefore, it is desirable that the gap between the meshing teeth is as small as possible. The portion of the pressure detector as an example of the occlusal force meter has a width dimension of 18 mm and a thickness dimension of 8.5 mm, and there is a problem that it is difficult to bite in actual use.

  The present invention has been made in view of the present situation, and an object of the present invention is to provide a dental occlusal force measuring device that is easy to bite and that takes into consideration the protection of the teeth of the measurement subject.

In order to achieve the above object, the present invention is configured as follows. That is, the dental occlusal force measuring device according to the present invention is
A dental occlusal force measuring device comprising a measuring instrument and an occlusal force meter,
The occlusal force meter consists of a protective cover that covers the occlusal force meter body,
The occlusal force meter main body is provided with two electrode wires made of a conductive material, a connection terminal and a ground terminal at one end, a circular pressure-sensitive part at the other end, and the connection terminal and the pressure-sensitive part as electrodes. A shield film is laminated on both sides of a sensor substrate formed by laminating a resin sheet connected by a wire, and the shield film is connected to a ground terminal provided between connection terminals,
A pressure-sensitive part is laminated with a circular protective plate, and a reinforcing plate is laminated on the outer surface of the shield film,
The protective cover is a heat-shrinkable tube, wherein the heat-shrinkable tube is shrunk to integrate the occlusal force meter main body and a connection cord socket connected to a measuring instrument.

  The shield film is formed of copper foil, and the ground terminal and the shield film are connected by connection wiring, or are connected by protruding a part of the tip of the shield film. The sensor substrate is a polyester sheet having a thickness dimension of 0.2 mm, a width dimension of 12 mm, and a length dimension of 100 mm, and the reinforcing plate on the outer surface of the shield film can be made of a hard resin. In addition, the pressure-sensitive part may be a planar circle, and a part of the protective cover that is located in the pressure-sensitive part may be provided with a circular protective plate that is slightly larger than the pressure-sensitive part.

  It is desirable to use the occlusal force meter with a removable disposable cover that is separately formed and marked with a mark indicating the position of the protective plate and the pressure-sensitive portion.

  The occlusal force measuring device for dental use according to the present invention is easy to hold and handle because the occlusal force meter constituting the dental occlusal force meter is reinforced by a hard resin reinforcing plate and the connection cord is integrally provided. In addition, a shield film made of copper foil is layered on the sensor board for centuries, and the shield film is connected to the ground terminal provided on the sensor board. Is possible.

  In addition, a protective plate that is the same as or slightly larger than the pressure sensitive part is provided on the outer surface of the sensor board where the pressure sensitive part is located, so that the pressure sensitive part can be protected and pressure can be applied uniformly throughout. Accurate occlusal force can be measured. Moreover, durability is improved by the protective plate, and it can be used repeatedly. Furthermore, when a disposable cover is used for the occlusal force meter, it is possible to prevent bacterial infection and damage to teeth when biting.

It is an explanatory upper surface perspective view showing one embodiment of an occlusal force measuring device. It is a perspective view which shows an example of the occlusal force meter of FIG. It is a disassembled perspective view of the occlusal force meter of FIG. It is decomposition | disassembly explanatory drawing before coat | covering a protective cover on an occlusal force meter. It is a top view of the state which covered the protective cover to the occlusal force meter. It is a perspective view of the disposable cover used at the time of a measurement. It is sectional drawing of a disposable cover similarly.

  Below, one Embodiment of the occlusal force measuring apparatus of this invention is described based on FIG. FIG. 1 shows an example of an occlusal force measuring device. The occlusal force measuring apparatus shown in FIG. 1 includes a measuring instrument 10 and an occlusal force meter 20. The measuring instrument 10 has a built-in battery, and various operation buttons such as a power button 12, a preset button 13, and a hold button 14 are provided on the upper surface side of the measuring instrument main body 11.

  Moreover, the display part 15 is provided in the upper surface side of the measuring device main body 11, and the insertion port 17 which connects the connection cord 16 of the biting force meter 20 which detects biting force is provided in the front side. The measuring instrument body 11 may be provided with a power cord instead of a battery, or may be connected to a printer with a connection cord.

  The occlusal force meter 20 includes an occlusal force meter body 20A and a protective cover 20B as shown in FIGS. The occlusal force meter body 20A includes a sensor substrate 21, a shield film 22 disposed on the upper and lower surfaces of the sensor substrate 21, and a circular protection layered on the pressure-sensitive portion 21c of the sensor substrate 21 on the tip side of the shield film 22. A reinforcing plate 25 is provided on the outer surface side of the plate 23 and the shield film 22.

  The sensor substrate 21 is formed by laminating two upper and lower resin sheets 21a. On each of the sheets, there are two electrode wires 21b made of a conductive material (silver), a pressure-sensitive ink layer is applied thereon, and a conductive material (for example, pressure-sensitive ink is applied to the tip) A circular pressure-sensitive portion 21c (for example, a diameter of 9.5 mm) made of silver is formed. At one end of the sensor substrate 21, a connection terminal 21d and a round terminal 21e are projected. It is formed by laminating these two sheets with an adhesive. The pressure-sensitive ink layer is a layer whose electrical characteristics change when pressure is applied.

  As an example, the sensor substrate 21 can be formed of a polyester sheet having a thickness dimension of 0.2 mm, a width dimension of 12 mm, and a length dimension of 100 mm. Furthermore, the conductive material (silver) connects the pressure-sensitive part 21c and the other terminal terminal part 21d as conductive wiring. The terminal portion 21d and the ground terminal 21e are composed of two male square pins, and are inserted into the socket 18 of the connection cord 16 to the measuring instrument main body 11.

  Since the sensor substrate 21 configured as described above operates as a resistor, the resistance is high in a no-load state, but the resistance decreases when a load is applied. This resistance can be read by connecting the terminal portion 21 d of the sensor substrate 21 to the measuring device main body 11.

  Since the pressure-sensitive part 21c is formed while laminating thin sheets, it is used as it is as an occlusal force meter, and when pressure is applied by the teeth, it is scratched by the jagged surface of the tooth mating surface and used once. It becomes impossible. Accordingly, the protection plate 23 is bonded and fixed to both surfaces of the pressure sensitive portion 21c in order to prevent the pressure sensitive portion 21c from being deformed.

  In addition, it is necessary that a uniform pressure is applied to the pressure-sensitive portion 21c, but by providing the protective plate 23, the pressure is distributed over the entire pressure-sensitive surface. As a result, an accurate occlusal force can be measured. The protective plate 23 is made of ceramic, stainless steel, steel plate or the like and has the same or slightly larger diameter than the pressure-sensitive portion 21c, for example, a disk having a diameter of 10 mm.

  Further, shield films 22 made of copper foil tape are laminated on both surfaces of the sensor substrate 21 in order to prevent induction and noise from the living body. The shield film 22 and the ground terminal 21 e are connected, and the ground terminal 21 e is inserted into the socket 18 of the connection cord 16. As shown in FIG. 3, the shield film 22 and the ground terminal 21e may be connected via a connection wiring 21f, or may be connected with a part of the tip of the shield film 22 protruding. The thickness dimension of the shield film 22 can be set to 0.07 mm, for example.

  The shield films 22 on both surfaces of the sensor substrate 21 are made of copper foil and connected to the ground terminal 21e, whereby the guidance and noise from the living body when held in the hand can be cut off and accurate measurement is possible.

  Further, a hard resin reinforcing plate 25 is adhered to the outer surface of the shield film 22 so as to be easily held when being held by hand. The thickness dimension of the reinforcing plate 25 can be set to 1 mm, for example. By bonding the reinforcing plate 25, the combination of the occlusal force meter body 20A is completed. The occlusal force meter main body 20A can be used as a dental occlusal force meter by connecting the occlusal force meter main body 20A to the measuring instrument 10 via a connection cord 16.

  Furthermore, in order to use the occlusal force meter main body 20A more easily, it is preferable that the occlusal force meter 20 is integrated by incorporating the connection cord 16 with the protective cover 20B. In order to integrate the occlusal force meter main body 20A and the connection cord 16, the heat-shrinkable tube 20Ba may be covered and integrated. In order to cover the heat-shrinkable tube 20Ba, the terminal cord 21d and the ground terminal 21e are reinforced in advance to reduce the level difference between the connection cord 16 and the socket 18 and to reinforce the base of the terminal portion 21d and the ground terminal 21e. The material 26 is wound and placed. The reinforcing member 26 is wound so that the distal end portion of the terminal portion 21d protrudes to a length that can be inserted into the socket 18 (see FIG. 4).

  Next, the terminal portion 21d is inserted into the socket 18, and the heat-shrinkable tube 20Ba is inserted from the protective plate 23 and pressure-sensitive portion 21c side of the occlusal force meter body 20A to the socket 18 portion (see FIG. 4). After covering the heat-shrinkable tube 20Ba, it is overheated and shrunk with a dryer, a heating gun or the like to obtain a protective cover 20B. A shrinkable material such as polyester or polyvinyl chloride resin (PVC) can be used for the heat shrinkable tube 20Ba.

  As shown in FIG. 5, the occlusal force meter main body 20 </ b> A and the connection cord 16 can be integrated by the protective cover 20 </ b> B formed by shrinking the heat-shrinkable tube 20 </ b> Ba, and can be used safely and easily. Further, by integrating the occlusal force meter main body 20A and the connection cord 16, waterproofness is ensured and product management becomes easy.

  It is preferable that a mark 27 having the same size as the circular protective plate 23 is attached to portions of the protective cover 20B located on the circular protective plate 23 and the pressure sensitive portion 21c. The mark 27 may be provided before shrinking in advance on the portion of the heat-shrinkable tube 20Ba located on the circular protective plate 23, or may be attached after shrinking. The mark 27 may be formed in the same size as the circular protective plate 23 using the same material as the protective plate 23, such as ceramic, stainless steel, steel plate, or the like.

  Further, the use of the bite force meter 20 will be described. In order to use the bite force meter, it is preferable to use a transparent resin-made disposable bag-like cover 30 in order to improve the biting force of the bite force meter 20 and to protect teeth and prevent bacterial infection. The disposable cover 30 is sized so that the bite force meter 20 can be inserted, and a mark 31 having the same size as the mark 27 is attached so that the position and range of the mark 27 can be seen when biting. The mark 31 may be a resin made of the same material as the disposable cover 30, but is a resin having a hardness that does not apply a local load close to a point contact on the teeth when chewed, and is preferably a resin that is elastic to some extent. .

  By providing the elastic mark 31, the tooth load is dispersed and the entire pressure is applied to the pressure-sensitive portion 21 c, so that it becomes easy to bite, the usability is improved, and safe and accurate measurement of the occlusal force is possible. . The mark 31 serves as a standard for chewing, relieves pain felt when chewing, and prevents the measurement subject's teeth from being damaged. The disposable cover 30 is used for each person to be measured in order to prevent bacterial infection and accurately measure.

  Next, measurement of the occlusal force by the occlusal force measuring device will be described. In this embodiment, in order to obtain an occlusal force curve accurately, a bias voltage is applied to both ends of the electrode wire 21b, a change in pressure is converted into a current voltage, and calibration is performed at a predetermined pressure. Shall.

  First, when measuring, the plug of the connection cord 16 is inserted into the insertion port 17 of the measuring device main body 11. Next, the occlusal force meter 20 is covered with the disposable cover 30 and the protective plate 27 and the mark 31 are aligned. The occlusal force meter 20 is protected by a cover 20B in which the occlusal force meter main body 20A is made by shrinking the heat-shrinkable tube 20Ba, and can be easily inserted into the disposable cover 30.

  Hold the occlusal force meter 20 by hand and put the portion of the mark 31 into the mouth. Then, after positioning, if the mark 31 is bitten with teeth, the biting force at this time is transmitted to the measuring instrument 10 through the connection cord 16 via the electrode wire 21b. The occlusal force is uniformly applied to the pressure-sensitive portion 21c from the right angle direction by the marks 31 and the marks 27, and the measurement is accurately performed. The electrode wire of the occlusal force meter main body 20A uses a pressure-sensitive resistor whose resistance value decreases almost linearly when pressure is applied, so that the occlusal force is numerically converted and displayed on the measuring instrument 10. The

  Since the disposable cover 30 is provided with a mark 31 and the position of the biting portion is clear, it is easy to handle and enables accurate measurement. Moreover, by using the disposable cover 30, while preventing infection of bacteria, the occlusal force meter 20 can be used for a long time.

10: Measuring instrument 11: Measuring instrument body 12: Power button 13: Preset button 14: Hold button 15: Display unit 16: Connection cord 17: Insertion port 18: Socket 20: Occlusal force meter 20A: Occlusal force meter body
20B: Cover 21: Sensor substrate 21a: Resin sheet 21b: Electrode wire 21c: Pressure sensitive part
21d: Terminal portion 21e: Earth terminal 22: Shield film 23: Protection plate 25: Reinforcement plate 26: Reinforcement material 27: Mark 30: Disposable cover 31: Mark

Claims (5)

A dental occlusal force measuring device comprising a measuring instrument and an occlusal force meter,
The occlusal force meter consists of a protective cover that covers the occlusal force meter body,
The occlusal force meter main body is provided with two electrode wires made of a conductive material, a connection terminal and a ground terminal at one end, a circular pressure-sensitive part at the other end, and the connection terminal and the pressure-sensitive part as electrodes. A shield film is laminated on both sides of a sensor substrate formed by laminating a resin sheet connected by a wire, and the shield film is connected to a ground terminal provided between connection terminals,
A pressure-sensitive part is laminated with a circular protective plate, and a reinforcing plate is laminated on the outer surface of the shield film,
The protective cover is a heat-shrinkable tube, wherein the heat-shrinkable tube is shrunk so that the occlusal force meter main body and a socket of a connection cord connected to a measuring instrument are integrated. Occlusal force measuring device.   The shield film is formed of copper foil, and the ground terminal and the shield film are connected by a connection wiring, or a part of the tip of the shield film is protruded and connected. The dental occlusal force measuring device as described.   The sensor substrate is a polyester sheet having a thickness dimension of 0.2 mm, a width dimension of 12 mm, and a length dimension of 100 mm, and the reinforcing plate on the outer surface of the shield film is made of a hard resin. The dental occlusal force measuring device according to 1 or 2.   The pressure-sensitive part is a flat circular shape, and a circular protective plate slightly larger than the pressure-sensitive part is provided at a portion of the protective cover located in the pressure-sensitive part. The dental occlusal force measuring device according to claim 1.   The dental occlusal force measuring device according to any one of claims 1 to 4, wherein the occlusal force meter is used with a disposable cover formed separately.

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