JP2015000117A - Occlusal adjustment device and occlusal adjustment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an occlusal adjustment device that reduces burden of an operator, and enables an occlusal adjustment to be performed simply and accurately.SOLUTION: An occlusal adjustment device includes: an occlusal measuring device (10) for measuring bite with an occlusal contact state transferred thereon and quantitatively measuring the occlusal contact state; and an occlusal adjustment calculation device (20) for acquiring results measured by the occlusal measuring device, and performing calculation based on the results. The occlusal adjustment calculation device includes: means for extracting the part where the cutting is necessary based on the results; means for determining the amount to be cut about the part extracted by the extraction means; and means for determining operating conditions of a cutting device decided previously based on the determined amount to be cut.

Description

  The present invention relates to an occlusal adjustment device and an occlusal adjustment system for measuring the occlusal contact state of upper and lower jaw teeth and adjusting the occlusion.

Abnormalities in the occlusal contact state of the upper and lower jaw teeth cause various diseases such as temporomandibular disorders, caries and periodontal disease, and a correct occlusal contact state is required. In order to achieve such a correct occlusal contact state, occlusal adjustment is performed to selectively scrape the abnormal contact relationship between the upper and lower jaw teeth.
Occlusal adjustment itself has been studied and implemented for a long time and is well known, but there are various methods, and a plurality of concepts and approaches have been proposed. However, in any of the methods, cutting of the early contact portion and the cusp interference portion, which is one of the abnormal portions in the occlusal contact state, is performed.

  When adjusting the occlusion, it is necessary to first grasp the occlusal contact state. For example, Patent Document 1 and Non-Patent Document 1 disclose devices for grasping (measuring) an occlusal contact state.

JP 2012-253 A

GC Corporation, “GC Product Catalog, GC Byte Eye BE-I”, [online], [Search June 13, 2013], <URLhttp: //www.gcdental.co.jp/sys/data/item / 1176 />

  However, even if the occlusal contact state can be grasped by these devices, it is the practitioner that actually cuts the teeth in the oral cavity, and the practitioner manually operates the cutting tool to perform cutting. . The operating conditions of the cutting tool at this time also depended on the operator's senses. Therefore, the practitioner has a burden of determining the operating conditions of the cutting apparatus, and the determined operating conditions are not always appropriate, and accurate adjustment may not be possible.

  In view of the above problems, an object of the present invention is to provide an occlusal adjustment device that can easily and accurately adjust occlusion while reducing the burden on the operator. Moreover, the occlusal adjustment system using the occlusal adjustment apparatus is provided.

  The present invention will be described below. Here, for easy understanding, reference numerals attached to the drawings are written in parentheses, but the present invention is not limited to this.

  The invention according to claim 1 is an occlusal measurement device (10) for measuring a bite (15) to which an occlusal contact state is transferred and quantitatively measuring the occlusal contact state, and a result measured by the occlusal measurement device. And an occlusal adjustment calculating device (20) that calculates based on the result, and the occlusal adjustment calculating device extracts means (21a) that extracts a portion that requires cutting based on the result. Means (21a) for determining the amount to be cut for the portion extracted by the means, and means (21a) for determining a predetermined operating condition of the cutting device based on the determined amount to be cut And an occlusal adjustment device (2).

  According to the second aspect of the present invention, in the occlusal adjustment device (2) according to the first aspect, the occlusal measurement device (10) quantitatively determines the occlusal contact state by measuring the thickness distribution of the bite (15). It is characterized by measuring.

  Invention of Claim 3 is the data of the operating condition determined by the means (21a) which determines the operating condition of the cutting apparatus of the occlusal adjusting apparatus (2) of Claim 1 or 2 and an occlusal adjusting apparatus. And an occlusal adjustment system (1) comprising a cutting device (30) that operates according to the operating conditions.

  According to a fourth aspect of the present invention, in the occlusal adjustment system (1) according to the third aspect, the cutting device (30) includes an erbium yag laser generator (31d).

  According to the present invention, the operating condition of the cutting apparatus for adjusting the occlusion is automatically calculated after quantitatively grasping the accurate occlusal contact state, and the conditions of the cutting apparatus are also set. The burden of is reduced. In addition, both are based on quantitative calculation results, and the accuracy of adjustment can be increased.

1 is a diagram conceptually showing an occlusal adjustment system 1. FIG. 1 is an external perspective view of an occlusal measurement device 10. FIG. It is a figure explaining the measurement of the occlusion measuring apparatus. It is a figure showing the wavelength characteristic of the illumination light from the light source with which the occlusion measuring apparatus 10 is equipped. FIG. FIG. 3 is a diagram conceptually illustrating a configuration of an occlusal adjustment calculation device 20. 2 is a diagram conceptually illustrating a configuration of one example of a cutting device 30. FIG. It is a figure explaining the flow of occlusal adjustment method S10.

  The above-described operation and gain of the present invention will be clarified from the embodiments described below. Hereinafter, the present invention will be described based on embodiments shown in the drawings. However, the present invention is not limited to these forms.

  FIG. 1 is a diagram illustrating one embodiment, and is a diagram conceptually showing an occlusal adjustment system 1. As can be seen from FIG. 1, the occlusal adjustment system 1 includes an occlusal adjustment device 2 and a cutting device 30, and the occlusal adjustment device 2 includes an occlusal measurement device 10 and an occlusal adjustment calculation device 20. Yes.

  The occlusal measurement device 10 is a device that measures the occlusal contact state of upper and lower jaw teeth. The form of the apparatus is not particularly limited as long as the occlusal contact state can be measured, but here, one form example will be described.

  FIG. 2 shows an appearance of the occlusal measurement apparatus 10 according to the one example. The occlusal measurement device 10 includes a measurement unit 11 and a display unit 12. By inserting a measurement target byte inside the measurement unit 11 and starting measurement, the result is displayed on the display unit 12. It is configured. Further, an output function and a connection terminal (not shown) are provided so that the measurement result can be output to the occlusal adjustment calculation device 20.

  FIG. 3 schematically shows the principle of occlusion measurement by the occlusal measurement apparatus 10. As can be seen from FIG. 3, in the occlusal measurement apparatus 10, when the bite 15 to which the subject's occlusal contact state is transferred is placed in the measurement unit 11 and measurement is started, the light source 13 arranged on one side of the bite 15. Illumination light is irradiated from. On the other hand, in the occlusal measurement apparatus 10, a camera 14 that captures an image is disposed on the opposite side of the light source 13 with the bit 15 interposed therebetween.

  Here, the bite 15 has the upper and lower tooth row shapes in an occluded state transferred to the front and back. That is, of the occlusal surfaces of the upper and lower dentitions, the thickness distribution according to the occlusal state is such that the portion of the bite 15 that is strongly contacted becomes thinner and the portion of the bite 15 that is weakly contacted is thicker. Has occurred. Therefore, when illumination light is irradiated from the light source 13 from one side of the cutting tool 15, the thinner the portion, the brighter the transmitted light. The occlusal measurement device 10 captures the transmitted light with the camera 14 and distinguishes 256 gradations obtained by converting the brightness (light intensity) distribution into grayscale into several bands, thereby making an occlusal contact. The condition is evaluated quantitatively. That is, the occlusal contact state is grasped from the thickness distribution of the cutting tool 15.

As an example, FIG. 4 shows the wavelength characteristics of the light emitted to the bite 15 by the occlusal measurement apparatus 10 having white illumination light. FIG. 4A is a result of measuring the illumination light of the occlusal measurement apparatus with a spectroscopic analyzer, and is a diagram showing a color matching function in a CIE 2 ° visual field.
Next, tristimulus values X, Y, and Z are calculated based on the color matching function of FIG. 4A, and from this, weighting by gray scale at each wavelength is performed using the following equation (1). ) On the vertical axis.
White light (λ) · (0.41 · X (λ) + 0.62 · Y (λ) + 0.05 · Z (λ)) (1)

  Here, λ means wavelength. FIG. 4B shows a calculation result obtained by applying the expression (1) to each of the color matching functions shown in FIG. 4A and a value (total value) obtained by summing them. As can be seen from the total value, the illumination light emitted from the light source of the occlusal measurement apparatus 10 in this example has peaks at wavelengths of 450 nm and 570 nm. Although the example in which the occlusal measurement apparatus has white illumination light is shown in this example, the present invention is not limited to this.

  On the other hand, as shown in FIG. 5, the cutting tool 15 is formed in a plate shape having a predetermined thickness and corresponding to the dental arch. The bite material is not particularly limited as long as the occlusal contact state can be transferred and the shape thereof can be maintained. However, when the occlusal measurement apparatus 10 described here is used, the transmittance of light depends on the thickness. It is preferable that the material changes greatly. Thereby, the accuracy of measurement can be improved. Examples thereof include addition type silicone-based test materials (for example, “Blue Silicone”, GC Corporation). Alternatively, dental wax having a predetermined hardness and light transmittance can be used. As a suitable dental wax, the hardness is a pressure shortening rate of 3% or more and less than 70%, the light transmittance at 1 mm thickness is 3% or more and less than 20%, and the peak wavelength of transmitted light with respect to illumination light is an occlusal measuring device. The thing which becomes +/- 100nm with respect to the peak wavelength of the illumination light of this can be mentioned. With such a dental wax, it is possible to accurately measure the occlusal contact state with the occlusion measuring apparatus exemplified above.

  Here, the occlusion measuring apparatus 10 has been described as an example. According to this apparatus, it is possible to accurately measure the occlusal contact state in a short time. However, the measuring device in the occlusal contact state is not limited to this type, and other types of devices are possible. For example, it is possible to obtain the occlusal contact state by reading the unevenness formed by transferring the occlusal contact state formed on the front and back of the bite with a three-dimensional shape measuring device. As the three-dimensional shape measuring apparatus, a known apparatus such as one using a laser or one using moire interference fringes can be used.

  Returning to FIG. 1, the occlusal adjustment calculation device 20 will be described. The occlusal adjustment calculation device 20 acquires quantitative data of the occlusal contact state measured by the occlusal measurement device 10, specifies a portion to be cut such as an early contact portion and a cusp interference portion, and determines an amount to be cut. It functions as a means for calculating. Further, the occlusal adjustment calculation device 20 also functions as a means for determining the operating condition of the cutting device based on the cutting amount as a calculation result. The calculation performed by the occlusal adjustment calculation device 20 will be described later. FIG. 6 conceptually shows a block diagram of the configuration of the occlusal adjustment calculation device 20.

  The occlusal adjustment calculation device 20 includes a calculation device 21, input means 22, and display means 23. The computing device 21 includes computing means 21a, RAM 21b, storage means 21c, receiving means 21d, and output means 21e. The input unit 22 includes a keyboard 22a, a mouse 22b, an external storage device 22c that functions as one of storage media, and a communication unit 22d.

  The calculation means 21a is constituted by a so-called CPU (central operator), and is a means that is connected to the above-described components and can control them. Further, it executes various programs stored in the storage means 21c or the like that functions as a storage medium, and also functions as means for performing later-described calculations and generating various data based on the programs. The contents of the calculation will be described later, but extraction of parts to be cut such as parts of the early contact part and the cusp interference part, determination of the amount to be cut, and the like can be given. The operating condition data sent to

  The RAM 21b is a structural member that functions as a work area for the computing means 21a and a temporary data storage means. The RAM 21b can be configured by SRAM, DRAM, flash memory, or the like, and is similar to a known RAM.

  The memory | storage means 21c is a structural member which functions as a storage medium with which various programs and data used as the basis for obtaining the data which should be produced | generated as mentioned above and to be produced | generated. The storage unit 21c may be capable of storing various intermediate and final results such as various data obtained by executing the program.

  The receiving means 21d is a constituent member having a function for appropriately taking information from the outside into the arithmetic unit 21, and the input means 22 is connected to the receiving means 21d. This includes so-called input ports, input connectors, and the like.

  The output unit 21e is a component having a function of appropriately outputting information to be output to the outside among the obtained results, and the display unit 23, the cutting device 30, and various devices are connected thereto. This includes so-called output ports, output connectors, and the like.

The input device 22 includes, for example, a keyboard 22a, a mouse 22b, an external storage device 22c, a communication unit 22d, and the like. As the keyboard 22a and the mouse 22b, known ones can be used, and the description thereof is omitted.
The external storage device 22c is a known externally connectable storage unit and also functions as a storage medium. There is no particular limitation here, and various necessary programs and data can be stored. A known device can be used as the external storage device 22c. Examples thereof include CD-ROM and CD-ROM drive, DVD and DVD drive, hard disk, and various memories.
The communication unit 22d is a unit that directly transmits data from another device to the reception unit 21d. For example, the occlusal measurement device 10 can transmit the data of the occlusal contact state directly to the receiving means 21d.

  The display device 23 is a device that displays the calculation result of each scene, selection of various functions, and the like. An operator can operate the input device 22 while referring to the display device 23 to cause the arithmetic device 21 to function. As such a display device 23, a known display device can be applied, and examples thereof include a monitor.

  An example of such an occlusal adjustment calculation device 20 is a computer. The computer main body is usually provided with each device corresponding to the arithmetic unit 21, and the input means 22 and the display means 23 can be connected thereto.

  In the occlusal adjustment apparatus 2 described here, the occlusal measurement apparatus 10 and the occlusal adjustment calculation apparatus 20 have been described as being connected to each other as different apparatuses. However, the present invention is not limited to this, and the two may be integrated. Good. According to this, the occlusal adjusting device can be further reduced in size.

Returning to FIG. 1, the cutting device 30 will be described. The cutting device 30 is a device that includes means for actually cutting teeth based on the operating condition data of the cutting device created by the occlusal adjustment calculation device 20. There are various known means for sharpening teeth, but there is no particular limitation. However, it is preferable that the number of items that the operator himself should adjust as much as possible when executed based on the operating condition data. From this viewpoint, it is preferable to use a laser cutting method. Among these, an erbium yag laser (Er: YAG laser) that is particularly effective for hard tissues such as teeth is preferable. The erbium-yag laser uses erbium / yttrium / aluminum / garnet as a substrate, and is output as a pulse wave with a wavelength of 2.94 μm.
The erbium yag laser is easily absorbed by water and hydroxyapatite, and cuts hard tissues such as teeth by exciting water molecules to generate a water vapor explosion. Since there is very little fever, the influence on other tissues can be kept small.

  FIG. 7 conceptually shows the structure of the cutting device 30 using an erbium yag laser. In this embodiment, the cutting device 30 includes a laser generator 31, a communication unit 32, an optical fiber 33, and a handpiece 34. The laser generator 31 includes a control unit 31a, a receiving unit 31b, an input unit 31c, and a laser generator 31d.

  The control means 31a is a means for adjusting the laser output. The output of the laser can be defined by the pulse width, the pulse period, the irradiation energy per pulse, and the irradiation time.

The receiving unit 31b is a unit that receives the operating condition data of the cutting device determined by the occlusal adjusting device 2 through the communication unit 32. Therefore, the receiving means 31b is connected to the control means 31a and can pass the signal of the operating condition data to the control means 31a.
The input means 31c is a means for inputting operation conditions directly to the control means 31a, or for instructing whether to output or stop the laser, and is a means for inputting manually. Therefore, the input means 31c is connected to the control means 31a, and specifically includes an ON / OFF switch, a key, a mouse, and the like.

  The laser generator 31d is a device that generates an erbium-yag laser, and a known one can be used. The laser generator 31d generates a laser based on the operating conditions sent from the control means 31a.

  The communication unit 32 is a unit that transmits the operating condition data of the cutting device from the occlusal adjustment arithmetic unit 20 to the receiving unit 31b, and a known configuration related to data transmission can be applied. This can be wired or wireless.

  The optical fiber 33 is means for guiding the laser generated from the laser generator 31d to the handpiece 34, and a known optical fiber used for laser light can be used. Among these, a fluoride-based optical fiber having a small absorption loss with respect to the laser beam of the erbium yag laser is preferable.

  The handpiece 34 is connected to the optical fiber 33 and is a means for the operator to grasp and adjust the irradiation position of the laser beam. For this, a hand piece in a form used in a normal dental field can be used. The handpiece 34 is provided with a probe 34a that actually emits laser light, a switch (not shown) that turns on / off the output of the laser light, and the like.

  In this embodiment, the occlusal adjustment device 2 and the cutting device 30 are arranged as separate devices, and the form in which they are connected has been described. However, they are integrated, that is, the occlusal adjustment system 1 is an integrated device. It may be formed.

  Further, in the cutting apparatus 30, the apparatus may be configured to control the laser light using a galvano scanner from the viewpoint of efficiently cutting teeth with high accuracy and high speed by the laser light. The galvano scanner is a known device. For example, one or more laser reflecting mirrors are controlled by a combination of the X axis and the Y axis by a galvano motor to scan the laser beam.

  With the occlusal adjustment system 1 as described above, the operating condition of the cutting device is automatically determined by the occlusal adjustment device 2, so that the burden on the practitioner can be reduced. In addition, since the condition is also based on the measurement result of the occlusal contact state, the occlusal adjustment can be accurately performed. Below, the occlusal adjustment method S10 concerning one example by the occlusal adjustment system 1 is demonstrated. Moreover, in this description, the content of the calculation concerning one example which the occlusal adjustment calculating device 20 should perform is described.

  FIG. 8 shows the flow of the occlusal adjustment method S10. As can be seen from FIG. 8, the occlusal adjustment method S10 includes an occlusal contact state measurement step S20, a cutting site extraction step S30, a cutting amount determination step S40, an operating condition determination step S50, and a cutting step S60. Hereinafter, each step will be described.

The occlusal contact state measurement step S <b> 20 (may be referred to as “step S <b> 20”) is a step of quantitatively measuring the occlusal contact state by the occlusal measurement device 10. Here, the subject's occlusion state is transferred to the bite material prepared first by occlusion. As a result, a thickness distribution corresponding to the occlusal contact distribution is generated in the bite material, and the bite 15 can be obtained.
Next, the obtained bit 15 is installed in the occlusion measuring device, and the bit 15 is measured by measurement based on the type of the installed device, and the occlusal contact state is obtained quantitatively. In the occlusal measurement apparatus 10 described above, the thickness distribution of the bite 15 is quantitatively grasped as the distribution of the occlusal contact state by measuring the intensity distribution of the light transmitted through the bite 15.

The cutting part extraction step S30 (may be described as “step S30”) is a step of extracting a part to be cut by the occlusal adjustment calculation device 20 based on the distribution of the occlusal contact state obtained in step S20. is there. This is advanced by the calculation means 21a based on a program stored in advance in the storage means 21c of the occlusal adjustment calculation device 20.
In this step, from the distribution data of the occlusal contact state obtained in step S20, a part that is determined to cause malocclusion called an early contact part or a cusp interference part is preferentially extracted as a part to be cut. The Furthermore, in view of not only individual teeth but the entire dentition, it is preferable that the left-right balance and the front-back balance of the occlusal contact area and the number of contact points of the dentition are maintained. Further, for example, a cutting site that prioritizes maintenance of the masticatory ability over the balance of the dentition may be extracted according to oral conditions such as the number of remaining teeth and occlusal force.

The cutting amount determination step S40 (may be referred to as “step S40”) is a step of determining, for each part extracted in step S30, how much cutting is specifically required for each part. It is. This is advanced by the calculation means 21a based on a program stored in advance in the storage means 21c of the occlusal adjustment calculation device 20.
Specifically, for example, the cutting amount can be determined as follows. As described above, when cutting the portion that causes malocclusion such as the early contact portion or the cusp interference portion, the area of the portion with a high degree of cornering (the portion displayed in a predetermined color on the occlusal measurement device) becomes wide, The number of parts also increases. That is, it is one standard for eliminating the early contact to cut a portion having a high degree of squeezing at two or more points in the dentition that are not on the same tooth. Therefore, how much the tooth is cut can be determined by considering a cutting depth at which two or more contact parts not on the same tooth are generated in the dentition. On the other hand, when there is no early contact, it is desirable that the left-right balance and the front-back balance of the dentition are higher. Therefore, the minimum tooth cutting amount can be determined from the viewpoint of MI (minimal intervention). . Moreover, it may be possible to adjust the cutting amount according to the judgment of the dentist depending on the condition of each oral cavity. That is, a function that allows the dentist to select the degree of balance (for example, there is an operation system for selecting a degree of left-right balance within 10%, within 20%, etc.) may be added.

The operating condition determining step S50 (may be referred to as “step S50”) is the operating condition of each cutting device 30 for realizing this with respect to the cutting amount for each part determined in step S40. This is a process for determining cutting conditions. This is advanced by the calculation means 21a based on a program stored in advance in the storage means 21c of the occlusal adjustment calculation device 20. The operating conditions vary depending on the type of cutting device applied. For example, in the case of the erbium yag laser described above, the power density (W / cm ² ) is calculated and conditioned from the pulse width, pulse period, irradiation energy per pulse, irradiation time, and the like. In addition, it is preferable to determine the irradiation condition that causes the energy necessary for cutting to act in the shortest time from the viewpoint of suppressing heat accumulation that causes thermal damage to the teeth and pain.

Cutting process S60 (it may describe as "process S60".) Is a process of performing occlusal adjustment when the practitioner cuts teeth with the cutting device 30. At this time, the cutting device 30 obtains information on the operating conditions of the cutting device from the occlusal adjustment calculation device 20. Therefore, since the operating conditions in each part are already determined in step S50, the practitioner only has to guide the probe to the target part, and the necessary amount of cutting is performed by starting laser irradiation after the guidance, for example. .
Here, a galvano scanner can be used as described above when cutting teeth more precisely. Automatic scanning with laser light enables accurate and high-speed cutting.

  As described above, according to the occlusal adjustment device 2 and the occlusal adjustment system 1 including the same, the operating condition of the cutting device for occlusal adjustment is automatically calculated after quantitatively grasping the accurate occlusal contact state. Since the operating condition of the cutting device is automatically set based on the operating condition data, the burden on the practitioner is reduced. Moreover, all are based on the quantitative calculation result, and can improve the precision of occlusal adjustment.

DESCRIPTION OF SYMBOLS 1 Occlusal adjustment system 2 Occlusal adjustment apparatus 10 Occlusal measuring apparatus 20 Occlusal adjustment calculating apparatus 30 Cutting apparatus

Claims (4)

An occlusal measuring device that measures a bite to which the occlusal contact state is transferred, quantitatively measures the occlusal contact state, and obtains a result measured by the occlusal measurement device, and performs an operation based on the result Occlusal adjustment operation device
The occlusal adjustment computing device is:
Means for extracting a portion that requires cutting based on the results;
Means for determining the amount to be cut for the part extracted by the extracting means;
And a means for determining a predetermined operating condition of the cutting device based on the determined amount to be cut.   The occlusal adjustment apparatus according to claim 1, wherein the occlusal measurement apparatus quantitatively measures the occlusal contact state by measuring a thickness distribution of a bite. The occlusal adjustment device according to claim 1 or 2,
An occlusal adjustment system comprising: a cutting device that receives data of the operating condition determined by means for determining an operating condition of a cutting device of the occlusal adjusting device and operates according to the operating condition.   The occlusal adjustment system according to claim 3, wherein the cutting device includes an erbium yag laser generator.

Images