WO2008013181A1

WO2008013181A1 - Periodontal disease inspection device

Info

Publication number: WO2008013181A1
Application number: PCT/JP2007/064524
Authority: WO
Inventors: Satoru Shinpo
Original assignee: Satoru Shinpo
Priority date: 2006-07-24
Filing date: 2007-07-24
Publication date: 2008-01-31
Also published as: JPWO2008013181A1; JP5059764B2

Abstract

A periodontal disease inspection device (100) has an intraoral camera (110) and an image processing device (142). The intraoral camera (110) has an illumination device (126) for illuminating a target inspection portion (R) in an oral cavity and also has an imaging device (118) for capturing an enlarged image of capillary vessels contained in the target inspection portion (R) illuminated by the illumination device (126). The image processing device (142) has a function of evaluating the condition of the capillary vessels based on a captured image obtained from the imaging device (118). The periodontal disease inspection device (100) can provide highly quantitative and objective inspection result without pain to a patient.

Description

Specification

Periodontal disease inspection device

Technical field

The present invention relates to a periodontal disease inspection device.

Background art

[0002] As a method for inspecting periodontal diseases such as gingivitis, periodontitis, and periodontal disease, a periodontal pocket inspection method in which a metal probe is inserted into the gum and the condition in the gum is examined. X-rays obtained by moving a tooth between tweezers and checking the degree of periodontal disease according to the state of movement of the tooth at that time and examining the intraoral X-ray of the site to be examined There is a photo inspection method.

[0003] However, the periodontal pocket inspection method and the tooth mobility inspection method have a problem in that the patient is painful because the probe is inserted into the gum and the tooth is shaken. On the other hand, the X-ray photography inspection method has a problem that special equipment for taking X-ray photographs is required.

[0004] Therefore, a periodontal disease inspection device capable of solving these problems has been proposed.

(See, for example, patent literature;! -5.)

FIG. 7 is a diagram shown for explaining a conventional periodontal disease inspection device 500 described in Patent Document 1. In FIG. FIG. 7 (a) is a diagram showing an overall configuration of a conventional periodontal disease inspection apparatus 500.

FIG. 7 (b) is a diagram showing a state in which periodontal disease is examined using a conventional periodontal disease inspection device 500.

[0006] As shown in FIG. 7, a conventional periodontal disease inspection apparatus 500 inserts a metallic probe 525 including a light projecting optical fiber 513 and a light receiving optical fiber 519 into a periodontal pocket 508. Thus, it is a periodontal disease inspection device that inspects periodontal disease by optically measuring the depth of the periodontal pocket 508. For this reason, according to the conventional periodontal disease inspection apparatus 500, since it is not necessary to insert the probe into the gum, it is possible to reduce the problem of causing pain to the patient. Further, according to the conventional periodontal disease inspection apparatus 500, the problem that special equipment for taking X-ray photographs is required is eliminated. FIG. 8 is a view shown for explaining a conventional periodontal disease inspection device 600 described in Patent Document 2. As shown in FIG. FIG. 8 (a) is a diagram showing the overall configuration of a conventional periodontal disease inspection device 600, and FIGS. 8 (b) and 8 (c) show periodontal disease using the conventional periodontal disease inspection device 600. It is a figure which shows a mode that it checks and checks.

[0008] As shown in FIG. 8, a conventional periodontal disease inspection apparatus 600 causes illumination light L (p) made of, for example, p-polarized light to enter the gingival surface, and surface reflected light L (p) among the reflected light. (P-polarized component exclusively

Has 1 2. ) And internally reflected light L (p / s) (with p-polarized component L (p) and s-polarized component L (s)

3 3 3 The periodontal disease inspection apparatus inspects periodontal disease by obtaining texture information and color tone information such as surface irregularities from the surface reflection light image and the internal reflection light image obtained based on the received light intensity of (). Therefore, according to the conventional periodontal disease inspection device 600, since it is not necessary to insert the probe into the gum, it is possible to suppress the problem of causing pain to the patient. Further, according to the conventional periodontal disease inspection apparatus 600, there is no problem that a special facility for taking X-ray photographs is required.

FIG. 9 is a diagram for explaining a conventional periodontal disease inspection device 700 described in Patent Document 3. As shown in FIG. FIG. 9 (a) is a diagram showing an overall configuration of a conventional periodontal disease inspection device 700, and FIGS. 9 (b) to 9 (e) are diagrams showing a method of using the conventional periodontal disease inspection device 700. is there. Of these, Fig. 9 (b) shows how saliva is removed by jetting water or air to the site to be inspected, and Fig. 9 (c) shows IKSUMI 761 as a light-absorbing substance at the site to be inspected. Fig. 9 (d) is a diagram showing an image obtained by photographing the examination site with a CCD camera, and Fig. 9 (e) is an image of Fig. 9 (d). FIG. 6 is a diagram showing an image obtained by binarizing

[0010] As shown in Fig. 9, the conventional periodontal disease inspection apparatus 700 is a region to be examined (Fig. 9 (b) and Fig. 9) adjusted so that the IKSUMI 761 remains only in the periodontal disease blind sac 750. 9 (c) is a periodontal disease inspection device that examines periodontal disease by measuring the light transmission state of the region to be examined. For this reason, according to the conventional periodontal disease inspection device 700, it is not necessary to insert the probe into the gum, so that the problem of causing pain to the patient can be suppressed. Further, according to the conventional periodontal disease inspection apparatus 700, there is no problem that special equipment for taking X-ray photographs is required. [0011] FIG. 10 is a view for explaining a conventional periodontal disease inspection device 800 described in Patent Document 4. In FIG.

As shown in FIG. 10, the conventional periodontal disease inspection device 800 measures periodontal disease by measuring radiation infrared rays from the test periodontal tissue 802 with an infrared camera 801. Inspection equipment. Therefore, according to the conventional periodontal disease inspection device 800, since it is not necessary to insert the probe into the gum, it is possible to suppress the problem of causing pain to the patient. Further, according to the conventional periodontal disease inspection device 800, the problem that special equipment for taking X-ray photographs is required is eliminated.

[0013] A conventional periodontal disease inspection apparatus 900 (not shown) described in Patent Document 5 irradiates the gingival part with light of 320 nm to 670 nm, and from teeth, plaque, or tartar in the periodontal pocket. It is a periodontal disease inspection device that examines periodontal disease by observing the excitation light and evaluating the presence or absence of plaque and calculus in the periodontal pocket and the depth of the periodontal pocket. For this reason, according to the conventional periodontal disease inspection device 900, it is not necessary to insert the probe into the gum, so that the problem of causing pain to the patient can be suppressed. Further, according to the conventional periodontal disease inspection apparatus 900, the problem that special equipment for taking X-ray photographs is required is eliminated.

[0014] Patent Document 1: Japanese Unexamined Patent Publication No. 2000-14684

Patent Document 2: JP 2001-87223 A

Patent Document 3: Japanese Patent Laid-Open No. 9 276298

Patent Document 4: Japanese Unexamined Patent Publication No. 2000-166950

Patent Document 5: Japanese Unexamined Patent Application Publication No. 2006-6373

Disclosure of the invention

Problems to be solved by the invention

[0015] However, in the conventional periodontal disease inspection apparatus 500, a probe is inserted in the periodontal pocket.

In order to insert 525, it is necessary to insert the probe 525 by expanding the gingiva, which causes a problem in that it causes pain to the patient.

[0016] Further, in the conventional periodontal disease inspection apparatus 600, the periodontal color tone has a large individual difference. It is difficult to determine whether the observed color tone is normal or not. Sex There is a problem that it is difficult to obtain a high test result.

[0017] In addition, in the conventional periodontal disease inspection device 700, it is difficult to accurately control the amount of the light-absorbing substance to be applied, so it is difficult to obtain a highly quantitative and objective test result. If so, there is a problem.

[0018] Further, in the conventional periodontal disease inspection device 800, the temperature difference between the subjects and the temperature when the environment changes rather than the temperature difference between the healthy periodontal part and the periodontal part having periodontal disease. Since the difference is larger, there is still a problem that it is difficult to obtain a highly quantitative and objective test result.

[0019] In addition, in the conventional periodontal disease inspection device 900, since the depth of the periodontal pocket is evaluated on the assumption that dental plaque and calculus are present in the periodontal pocket, plaque and calculus In the absence of this, there is a problem that the depth of the periodontal pocket cannot be evaluated, and it is difficult to obtain a highly quantitative and objective test result.

[0020] Therefore, the present invention has been made to solve such a problem, and it is possible to obtain a highly quantitative and objective test result without causing pain to the patient. An object is to provide a periodontal disease inspection device.

Means for solving the problem

[0021] (1) A periodontal disease inspection device according to the present invention includes an illumination device that illuminates a region to be examined in the oral cavity, and an imaging device that magnifies and images a capillary vessel included in the region to be examined illuminated by the illumination device. And / or an image processing device having a function of evaluating the state of capillaries based on a photographed image obtained from the imaging device.

In the periodontal disease inspection device of the present invention, the “capillary state” includes “degree of dilation of capillaries”, “degree of increase in permeability of capillaries”, “degree of bleeding from capillaries” "Degree", "degree of coagulation of blood bleeding from capillaries" and the like.

Therefore, according to the periodontal disease test apparatus of the present invention, the “capillary state” includes “degree of dilation of capillaries”, “degree of increase in permeability of capillaries”, “from the capillaries” The degree of periodontal disease (presence or absence of periodontal disease, progress of periodontal disease, etc.) can be assessed by evaluating the degree of bleeding of blood and the degree of coagulation of blood bleeding from capillaries alone or in combination. Such. ) It is possible to obtain test results with high quantitativeness and objectivity.

[0024] “The degree of dilation of capillaries” includes “whether the inner diameter, outer diameter, and wall thickness of the capillaries are in the normal range”, “inner diameter, outer diameter, and wall thickness of the capillaries ( What is the value of “wall thickness”, “whether the surface of the capillary is smooth”, “smooth of the surface of the capillary! /, In some cases, how smooth it is”. In addition, as “the degree of increased capillary permeability”, “whether or not the capillary is perforated and increased capillary permeability is observed” and “capillary permeability is increased”. If so, how much permeation is observed? " In addition, “the degree of bleeding from capillaries” includes “whether or not bleeding from capillaries can be seen”, “how much bleeding can be seen when bleeding from capillaries”, etc. To evaluate. “The degree of coagulation of blood bleed from capillaries” includes “whether clotting of blood bleed from capillaries is seen” or “how much coagulation is observed when blood bleeds from capillaries is seen” Evaluate the power to be seen.

Thus, for example, when the capillary inner diameter, outer diameter, and wall thickness (wall thickness) are in the normal range and the capillary surface is smooth, there is no periodontal disease. If the surface of the capillary blood vessel whose inner diameter, outer diameter, and wall thickness (wall thickness) are larger than the normal range is not smooth, “there is a mild periodontal disease” depending on the degree. , “I have moderate periodontal disease” or “I have severe periodontal disease”. In addition, for example, if there is no increase in capillary permeability, it is evaluated that there is no periodontal disease, and if there is an increase in capillary permeability, depending on the degree, Evaluate as having periodontal disease, having moderate periodontal disease, or having severe periodontal disease. In addition, for example, when bleeding from capillaries is not seen! /, In cases where there is no periodontal disease! /, Or there is mild periodontal disease, bleeding from capillaries If there is a symptom, it is evaluated as “moderate periodontal disease” or “severe periodontal disease”. In addition, for example, if blood clots bleeding from capillaries are not observed, it is evaluated as “no periodontal disease” or “mild periodontal disease”, and blood clots bleeding from capillaries are coagulated. If this occurs, it is evaluated as “moderate periodontal disease” or “severe periodontal disease” depending on the degree.

[0026] It should be noted that the evaluation of the state of the capillaries by the image processing apparatus is, for example, for many patients. It is preferable to perform evaluation using these evaluation criteria by preliminarily setting evaluation criteria by analyzing the results of all the imaging.

[0027] Further, according to the periodontal disease inspection device of the present invention, it becomes possible to inspect periodontal diseases by optically measuring the state of capillaries, so that the probe is attached to the gums and periodontal pockets. This eliminates the need to purchase and can reduce the problem of causing pain to the patient.

[0028] Therefore, the periodontal disease inspection device of the present invention is a periodontal disease inspection device that does not give pain to the patient and can obtain a highly quantitative and objective test result.

[0029] In the periodontal disease testing device of the present invention, the examination site is preferably a gum or an interdental papilla.

[0030] In the periodontal disease inspection device of the present invention, it is preferable that the imaging device includes an imaging device and an optical system for enlarging an image of a capillary blood vessel at a site to be examined and leading the image to the imaging device.

[0031] By configuring in this way, it is possible to magnify and image a capillary blood vessel without reducing the resolution.

[0032] In the periodontal disease inspection device of the present invention, it is preferable that the illumination device has a function of irradiating light having a wavelength that reaches the inside of the gums or interdental papilla. The optical system preferably has a function of focusing on capillaries existing in the gums and interdental papilla.

[0033] With this configuration, it is possible to photograph capillaries existing in the gums and interdental papilla in a focused state.

In the periodontal disease inspection device of the present invention, it is preferable that the optical system has an autofocus function.

[0035] With this configuration, it is possible to photograph the capillary blood vessel in a state where the capillary is always in focus.

In the periodontal disease inspection device of the present invention, it is preferable that the optical system has a camera shake prevention function.

[0037] With this configuration, the capillary blood vessels are always photographed in a state in which camera shake is prevented. It becomes the power S Kurakura.

In the periodontal disease inspection device of the present invention, it is preferable that the optical system has a zoom function.

[0039] With this configuration, it is possible to evaluate the state of the capillary from multiple angles by photographing the capillary at various magnifications.

[0040] In the periodontal disease inspection device of the present invention, it is preferable that the optical system has a function of changing the distance between the objective lens and a region to be examined.

[0041] With this configuration, it is possible to photograph capillaries from various distances by changing the distance to the region to be examined without moving the intraoral force mela.

[0042] (2) In the periodontal disease inspection device of the present invention, it is preferable that the image processing device further has a function of measuring a flow rate of blood flowing through a capillary vessel.

[0043] With this configuration, the relationship with other diseases (for example, diabetes, lifestyle-related diseases, etc.) is considered by determining the blood fluidity (in other words, the smoothness of blood). This makes it possible to obtain test results that are more quantitative and objective about periodontal diseases.

[0044] (3) In the periodontal disease inspection device of the present invention, it is preferable that the image processing device further has a function of evaluating the degree of inflammation in the gingiva.

[0045] With this configuration, by evaluating the degree of inflammation in the gingiva, it becomes possible to obtain test results with higher quantitativeness and objectivity for periodontal diseases.

[0046] (4) The periodontal disease inspection device of the present invention preferably further comprises a determination device that determines the degree of periodontal disease based on the evaluation result by the image processing device.

[0047] With this configuration, it is possible to make a determination that is one step further than evaluation, and it is possible to obtain a test result with higher quantitativeness and objectivity. In addition, since the mechanical determination by the determination device is possible, the inspection result can be obtained quickly. For this reason

The periodontal disease inspection apparatus of the present invention is an optimum periodontal disease inspection apparatus as a periodontal disease inspection apparatus used for mass examination.

[0048] Note that determining the degree of periodontal disease from the evaluation result by the image processing device is, for example,

, Using an etaspart system constructed by analyzing test results for a large number of patients Preferably.

[0049] (5) In the periodontal disease inspection device of the present invention, the image processing device has a function of determining a main imaging region based on a result of preliminary imaging in a region to be inspected, and the oral cavity The inner camera preferably has a function of photographing the main photographing region determined by the image processing device.

[0050] With this configuration, first, the preliminary imaging is performed roughly, and the main imaging area in the oral cavity is determined based on the preliminary imaging result, thereby quickly imaging the main imaging area. This makes it possible to obtain inspection results quickly.

[0051] (6) In the periodontal disease inspection device of the present invention, it is preferable to further include a fixing means for fixing the intraoral force mela at an appropriate position in the oral cavity.

[0052] With this configuration, it is possible to obtain a high-quality captured image (especially in the case of a moving image), and it is possible to obtain a test result with high quantitativeness and objectivity.

[0053] (7) In the periodontal disease inspection device of the present invention, it is preferable that the fixing means is a disposable cylindrical spacer used by being attached to a distal end portion of the intraoral force mela.

[0054] With this configuration, the disposable oral cylindrical spacer is attached to the distal end of the intraoral force mela, and the intraoral force mela is pressed to an appropriate position in the oral cavity. It is possible to fix the intraoral force mela at an appropriate position in the inside. In addition, hygienic periodontal disease testing can be performed by replacing disposable cylindrical spacers for each patient.

(8) It is preferable that the periodontal disease inspection device of the present invention further includes an imaging region fine movement device capable of finely moving an imaging region by the imaging device.

[0056] With this configuration, it is possible to precisely determine the optimum imaging range, and thus it is possible to obtain a test result with higher quantitativeness and objectivity.

[0057] In this case, the imaging region may be powered by moving the intraoral force mela, or the imaging region may be powered by moving the optical system while the intraoral camera is fixed.

(9) In the periodontal disease inspection device of the present invention, it is preferable that the illumination device has a function of illuminating a region to be inspected with illumination light having a wavelength that causes hemoglobin to float. [0059] With this configuration, it is possible to photograph the capillaries existing in the gums and interdental papilla with high contrast. In this case, it is possible to measure the flow rate of the blood flowing through the capillaries with particularly high accuracy.

[0060] (10) In the periodontal disease inspection device of the present invention, the periodontal disease inspection device further includes a polarizing filter that transmits one of p-polarized light and s-polarized light, and the illumination device includes: It is preferable that the other part of the p-polarized light and the s-polarized light is used to illuminate the examination site, and the imaging device has a function of photographing a capillary blood vessel via the polarizing filter.

[0061] When the illumination light (the other polarized light) reflected by the illuminating device is reflected on the surface of the examination target part (for example, the gums or interdental papilla), the polarization plane of the light is maintained, so that The reflected light (surface reflected light) cannot pass through the polarizing filter. On the other hand, when the illumination light (the other polarized light) is reflected inside the region to be inspected, the polarization plane of the light is not completely maintained, so the light reflected in this way (the internally reflected light) Some (one polarization) will be able to pass through the polarizing filter. For this reason, by configuring as described above, it becomes possible to eliminate the influence of light reflected from the surface of the examination target region, and it is possible to photograph the capillaries existing inside the examination target region with high contrast. It becomes possible.

(11) In the periodontal disease inspection device of the present invention, the periodontal disease inspection device does not pass light in a predetermined first wavelength region and is on the longer wavelength side than the first wavelength region. A color filter that allows light in a predetermined second wavelength band to pass; and the illuminating device has a function of illuminating the site to be inspected using excitation light having an emission peak in the first wavelength band. The imaging device preferably has a function of photographing a capillary blood vessel through the color filter.

[0063] When the illumination light (excitation light) from the illuminating device is reflected on the surface of the examination target site, the light (surface reflected light) reflected in this way is not accompanied by a change in the wavelength of the light. , Can not pass the color filter. On the other hand, when the illumination light (excitation light) reaches the inside through the surface of the site to be inspected, fluorescence having a wavelength longer than that of the illumination light is generated. As a result, the fluorescence (all or part) has a wavelength within the second wavelength range. And can pass through the color filter. For this reason, if the fluorescence is used as detection light, it is possible to eliminate the influence of the light reflected on the surface of the inspection target region even by configuring as described above. Capillary blood vessels existing inside the region can be imaged with high contrast.

[0064] (12) In the periodontal disease inspection device of the present invention, the periodontal disease inspection device does not transmit light for a predetermined first period, and transmits light for a predetermined second period after the first period. An optical shutter is further provided, and the illumination device has a function of illuminating the inspection target site using excitation light emitted within the first period, and the imaging device passes through the optical shutter. It is preferable to have the ability to photograph capillaries!

[0065] When the illumination light (excitation light) from the illuminating device is reflected on the surface of the examination site, the light reflected in this way (surface reflected light) is not delayed in the first period. Since it reaches the light shatter, it cannot pass through the light shatter. On the other hand, when the illumination light (excitation light) reaches the inside of the inspection target part through the surface of the inspection target part, fluorescence is generated within the inspection target part with a slight time delay. As a result, the fluorescence (all or a part) reaches the light shirter within the second period and can pass through the light shirter. For this reason, if the fluorescence is used as detection light, it is possible to eliminate the influence of the light reflected from the surface of the inspection target part even if configured as described above. Capable of photographing the capillaries existing inside the region with high contrast.

[0066] It is preferable that the periodontal disease inspection apparatus of the present invention further includes an image monitor.

With this configuration, when a captured image is displayed, it is possible to easily check and determine a shooting location. When displaying an evaluation result and a determination result, the evaluation result and the determination result are displayed. The result can be easily confirmed.

[0068] In addition, it is preferable that the periodontal disease inspection device of the present invention further includes a printing device.

[0069] With this configuration, it is possible to quickly and appropriately provide feedback to the patient by immediately printing a captured image, an evaluation result, a determination result, and the like. Collection Appropriate results can be output even when used for group screening.

Brief Description of Drawings

FIG. 1 is a diagram for explaining a periodontal disease inspection device 100 according to Embodiment 1.

FIG. 2 is a diagram showing a state in which periodontal disease is inspected using the periodontal disease inspection device 100 according to Embodiment 1.

FIG. 3 is a view for explaining a periodontal disease inspection device 100a according to Embodiment 2.

FIG. 4 is a view for explaining a periodontal disease inspection device 100b according to Embodiment 3.

FIG. 5 is a view for explaining a periodontal disease inspection device 100c according to a fourth embodiment.

FIG. 6 is a view for explaining a periodontal disease inspection device 100d according to Embodiment 5.

FIG. 7 is a view for explaining a conventional periodontal disease inspection device 500. FIG.

FIG. 8 is a view for explaining a conventional periodontal disease inspection device 600.

FIG. 9 is a view for explaining a conventional periodontal disease inspection device 700. FIG.

FIG. 10 is a view for explaining a conventional periodontal disease inspection device 800.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the periodontal disease inspection device of the present invention will be described based on the embodiments shown in the drawings.

[Embodiment 1]

FIG. 1 is a diagram for explaining a periodontal disease inspection device 100 according to the first embodiment. Fig. 1 (a) is an overall configuration diagram of the periodontal disease inspection device 100, and Fig. 1 (b) is a diagram illustrating the configuration of the intraoral force mela 110 in the periodontal disease inspection device 100. Fig. 1 (c) FIG. 4 is a view of the head portion 116 of the intraoral force mela 110 as viewed from the front.

FIG. 2 is a diagram showing a state in which periodontal disease is examined using the periodontal disease testing device 100 according to the first embodiment. Figure 2 (a) shows the case where periodontal disease is not observed.

2 (b) is a diagram in the case where periodontal disease is progressing.

[0073] As shown in Fig. 1 (a), the periodontal disease inspection device 100 according to Embodiment 1 has an intraoral force mela 1

10, an apparatus main body 140, an image monitor 150, and a printing apparatus 160. Intraoral force mela 1

10 and the device main body 140 are connected by a connection cord 130, and the device main body 140 and the printing device are connected.

160 is connected with a connection cord 132. [0074] As shown in FIGS. 1 (b) and 1 (c), the intraoral force mela 110 includes an illuminating device 126 that illuminates the examination site R (see FIG. 2) in the oral cavity, and an illuminating device 126. The imaging apparatus 118 which expands and image | photographs the capillary vessel contained in the test | inspection site | part R illuminated, the hand holding part 112, the arm part 114, and the head part 116 are provided.

The illumination device 126 is composed of a plurality of LED forces disposed in a peripheral portion on the front surface of the head unit 116. The illumination device 126 has a function of irradiating light having a wavelength that reaches the inside of the gums or interdental papilla. In addition, the illumination device 126 has a function of illuminating the examination target region R with illumination light having a wavelength that causes hemoglobin to rise.

The imaging device 118 includes an imaging element 122, an optical system 120, and an amplification unit 124. Optical system

120 has a function of enlarging an image of a capillary blood vessel at the examination site R and guiding it to the image sensor 122. The amplifying unit 124 has a function of amplifying an analog signal from the image sensor 122 and performing D / A conversion. The illumination operation of the illumination device 126 and the imaging operation of the imaging device 118 are controlled by the control unit 128.

[0077] The optical system 120 has a function of focusing on capillaries existing in the gums and interdental papilla. The optical system 120 has an autofocus function, a camera shake prevention function, and a zoom function.

The apparatus main body 140 includes an image processing device 142 (not shown) and a determination device 144 (not shown).

[0079] The image processing device 142 evaluates the state of the capillary blood vessel, the function of measuring the flow rate of blood flowing through the capillary blood vessel, and the degree of inflammation in the gingiva based on the captured image obtained from the imaging device 118. It has the function to do. The evaluation of the state of the capillaries by the image processing apparatus 142 is performed by, for example, analyzing the imaging results of a large number of patients and setting an evaluation criterion in advance and using this evaluation criterion.

Further, the image processing device 142 has a function of determining the main imaging region based on the preliminary imaging result in the examination target region R, and the intraoral force mesa 110 is the main imaging determined by the image processing device 142. It has a function of photographing an area.

The determination device 144 has a function of determining the degree of periodontal disease based on the evaluation result by the image processing device 142. The determination of the degree of periodontal disease in the determination device 144 is, for example, This is done using an etaspart system constructed by analyzing test results for a large number of patients.

In the periodontal disease inspection device 100 according to the first embodiment, “capillary state” includes “degree of dilation of capillaries”, “degree of increase in permeability of capillaries”, “from the capillaries” Degree of bleeding ”and“ degree of coagulation of blood bleeding from capillaries ”.

According to the periodontal disease inspection device 100 according to the first embodiment configured as described above, the “capillary state” includes “degree of capillary expansion” and “capillary hyperpermeability enhancement”. The degree of periodontal disease (presence or absence of periodontal disease, tooth It is possible to obtain highly quantitative and objective test results for perinatal disease progression.

[0084] “The degree of dilation of capillaries” includes “whether the inner diameter, outer diameter, and wall thickness of the capillaries are in the normal range”, “inner diameter, outer diameter, and wall thickness of the capillaries ( What is the value of “wall thickness”, “whether the surface of the capillary is smooth”, “smooth of the surface of the capillary! /, In some cases, how smooth it is”. In addition, as “the degree of increased capillary permeability”, “whether or not the capillary is perforated and increased capillary permeability is observed” and “capillary permeability is increased”. If so, how much permeation is observed? " In addition, “the degree of bleeding from capillaries” includes “whether or not bleeding from capillaries can be seen”, “how much bleeding can be seen when bleeding from capillaries”, etc. To evaluate. “The degree of coagulation of blood that bleed from capillaries” includes “whether clotting of blood that bleeds from capillaries is observed” or “how much coagulation is observed when blood clotting that bleeds from capillaries is observed” Evaluate the power to be seen.

[0085] Thus, for example, when the capillary inner diameter, outer diameter, and wall thickness (wall thickness) are in the normal range and the capillary surface is smooth, there is no periodontal disease. If the surface of the capillary blood vessel whose inner diameter, outer diameter, and wall thickness (wall thickness) are larger than the normal range is not smooth, “there is a mild periodontal disease” depending on the degree. , “I have moderate periodontal disease” or “I have severe periodontal disease”. For example, if increased capillary permeability is not observed, it is evaluated that there is no periodontal disease, and increased capillary permeability is observed. If there is a periodontal disease, it will be evaluated as “mild periodontal disease”, “moderate periodontal disease” or “severe periodontal disease”. In addition, for example, when bleeding from capillaries is not seen! /, In cases where there is no periodontal disease! /, Or there is mild periodontal disease, bleeding from capillaries If there is a symptom, it is evaluated as “moderate periodontal disease” or “severe periodontal disease”. In addition, for example, if blood clots bleeding from capillaries are not observed, it is evaluated as “no periodontal disease” or “mild periodontal disease”, and blood clots bleeding from capillaries are coagulated. If this occurs, it is evaluated as “moderate periodontal disease” or “severe periodontal disease” depending on the degree.

[0086] Further, according to the periodontal disease inspection device 100 according to Embodiment 1, it becomes possible to inspect periodontal diseases by optically measuring the state of capillaries. The force S can be used to suppress the problem of causing pain to the patient because it is no longer necessary to insert it into the peripheral pocket.

Therefore, the periodontal disease inspection device 100 according to Embodiment 1 is capable of obtaining a highly quantitative and objective test result without causing pain to the patient, and Become.

In addition, according to the periodontal disease inspection device 100 according to the first embodiment, the imaging device 118 enlarges the image of the capillary vessel in the imaging element 122 and the examination target site R and guides it to the imaging device 122. 120, the capillaries can be sufficiently enlarged and photographed without reducing the resolution.

Further, according to the periodontal disease inspection device 100 according to the first embodiment, the illumination device 126 has a function of irradiating light having a wavelength reaching the inside of the gums or interdental papilla, and the optical system 120. Has a function to focus on the capillaries in the gums and interdental papilla, so it is possible to shoot the capillaries in the gums and interdental papilla in focus. It becomes.

[0090] Further, according to the periodontal disease inspection device 100 according to the first embodiment, the optical system 120 has an autofocus function, so that it is possible to always photograph a capillary vessel in a focused state. . Further, according to the periodontal disease inspection device 100 according to the first embodiment, the optical system 120 has a camera shake prevention function, so that it is possible to photograph a capillary blood vessel in a state in which camera shake is always prevented. .

[0092] Further, according to the periodontal disease inspection device 100 according to the first embodiment, the optical system 120 has a zoom function, and therefore, the state of the capillary blood vessel can be varied by photographing the capillary blood vessel at various magnifications. It becomes possible to evaluate automatically.

[0093] According to the periodontal disease inspection device 100 according to the first embodiment, the image processing device 142 further has a function of measuring the flow rate of blood flowing through the capillary blood vessels. In other words, it is possible to determine the smoothness of the blood and consider the relationship with other diseases (for example, diabetes, lifestyle-related diseases, etc.). It is possible to obtain a high! / ヽ test result.

[0094] According to the periodontal disease inspection device 100 according to Embodiment 1, the image processing device 142 further has a function of evaluating the degree of inflammation in the gingiva. Therefore, by evaluating the degree of inflammation in the gingiva, It is possible to obtain more quantitative and objective test results for periodontal diseases.

[0095] According to the periodontal disease inspection device 100 according to the first embodiment, the illumination device 126 has a function of illuminating the examination site R with illumination light having a wavelength that makes the hemoglobin float, so that gums and teeth are used. Capillary blood vessels in the intermapillary head can be photographed with high contrast. In addition, it is possible to accurately measure the flow rate of blood flowing through the capillaries.

In addition, according to the periodontal disease inspection device 100 according to the first embodiment, since the determination device 144 that further determines the degree of periodontal disease based on the evaluation result by the image processing device 142 is further provided, This makes it possible to make in-depth judgments and to obtain inspection results with high quantitativeness and objectivity. In addition, since the determination by the determination device 144 is possible, the inspection result can be obtained quickly. Therefore, the periodontal disease inspection apparatus 100 according to Embodiment 1 is an optimal periodontal disease inspection apparatus as a periodontal disease inspection apparatus used for mass examination.

[0097] According to the periodontal disease inspection device 100 according to the first embodiment, the image processing device 142 includes an inspection pair. Based on the preliminary imaging result in the elephant region R! /, The function of determining the main imaging region is provided, and the intraoral force mela 110 has the function of imaging the main imaging region determined by the image processing device 142. First, the preliminary imaging is performed roughly, and the main imaging area in the oral cavity is determined based on the preliminary imaging result, so that the main imaging area can be quickly acquired and the examination result can be obtained quickly. It becomes possible.

[0098] According to the periodontal disease inspection device 100 according to the first embodiment, since the image monitor 150 is further provided, when a captured image is displayed, it is possible to easily confirm and determine the imaging location, When displaying the evaluation results and judgment results, the evaluation results and judgment results can be easily confirmed.

[0099] According to the periodontal disease inspection device 100 according to the first embodiment, since the printing device 160 is further provided, the imaging result, the evaluation result, the determination result, and the like are immediately printed, so that the patient can be quickly printed. Appropriate feedback can be provided. It is also possible to output appropriate results when used for mass screening.

[Embodiment 2]

FIG. 3 is a view for explaining the periodontal disease inspection device 100a according to the second embodiment. Fig. 3 (a) is a diagram showing the periodontal disease being examined using the periodontal disease inspection device 100a, and Fig. 3 (b) shows that the surface reflected light L (p) reaches the polarizing filter 170. Diagram showing the situation

2

Figure 3 (c) shows how the internally reflected light L (p / s) reaches the polarizing filter 170.

Three

FIG.

[0101] The periodontal disease inspection device 100a (not shown) according to Embodiment 2 has basically the same configuration as the periodontal disease inspection device 100 according to Embodiment 1, but includes a polarizing filter 170. In this respect, the functions of the illumination device and the imaging device are different from those of the periodontal disease inspection device 100 according to the first embodiment. That is, as shown in FIG. 3, the periodontal disease inspection device 100a according to the second embodiment further includes a polarizing filter 170 that passes s-polarized light out of p-polarized light and s-polarized light. Further, the illumination device 126a having a function of illuminating the inspection target region R using p-polarized light out of p-polarized light and s-polarized light is used as the illumination device, and a capillary blood vessel is photographed through the polarization filter 170 as the imaging device. It is assumed that an imaging device 118a (not shown) having a function to perform this function is used. [0102] When the illumination light (ρ) from the illuminator 126a is reflected from the surface of the region R to be examined (see Fig. 3 (b)), the polarization plane of the light is retained. The reflected light (surface reflected light) cannot pass through the polarizing filter 170. On the other hand, the illumination light L (p) is detected.

2 1 When the light is reflected inside the target region R (see Fig. 3 (c)), the polarization plane of the light is not completely maintained. (p / s)) part (s

Three

Polarized light) can pass through the polarizing filter 170. Therefore, according to the periodontal disease inspection device 100a according to the second embodiment, it is possible to eliminate the influence of light reflected from the surface of the examination target region R by using the s-polarized light as detection light. As a result, it is possible to photograph the capillaries existing inside the detection target region R with high contrast.

[0103] The periodontal disease inspection device 100a according to the second embodiment is different from the periodontal disease inspection device 100 according to the first embodiment in that the polarizing filter 170 is provided, and the functions of the illumination device and the imaging device are not included. Since it has the same configuration as the case, it has a corresponding effect among the effects of the periodontal disease inspection device 100 according to the first embodiment.

[Embodiment 3]

FIG. 4 is a view for explaining the periodontal disease inspection device 100b according to the third embodiment. Fig. 4 (a) is a diagram showing the periodontal disease being inspected using the periodontal disease inspection device 100b.

Fig. 4 (c) is a diagram showing how the fluorescence L reaches the color filter 172.

Four

d) shows the emission intensity of the illumination light L and fluorescence L and the light transmission rate T of the color filter 172.

1 4 1

A periodontal disease inspection device 100b (not shown) according to Embodiment 3 has basically the same configuration as the periodontal disease inspection device 100 according to Embodiment 1, but includes a color filter 172. And the functions of the illumination device and the imaging device are different from those of the periodontal disease inspection device 100 according to the first embodiment. That is, as shown in FIG. 4, the periodontal disease inspection device 100b according to the third embodiment does not pass light in a predetermined first wavelength range, and does not pass through a predetermined second wavelength on the longer wavelength side than the first wavelength range. A color filter 172 that allows light in the wavelength band to pass therethrough is further provided. In addition, as an illuminating device, an examination target region R is formed using excitation light having an emission peak in the first wavelength region. An imaging device 118b (not shown) having a function of imaging a capillary blood vessel via a color filter 172 is used as an imaging device.

[0106] When the illumination light L (excitation light) from the illuminator 126b is reflected on the surface of the inspection target site R (see Fig. 4 (b)), the change in the wavelength of the light does not occur. The light (surface reflected light L) reflected in this way cannot pass through the color filter 172. Meanwhile, illumination light

2

When L (excitation light) passes through the surface of the region R to be examined and reaches the inside (see Fig. 4 (c)), fluorescence L having a wavelength longer than that of the illumination light L is generated (Fig. 4). (See 4 (d).) So

14

As a result, the fluorescence L (all or a part) has a wavelength in the second wavelength range,

Four

Can pass through the filter 172. Therefore, according to the periodontal disease inspection device 100b according to Embodiment 3, by using the fluorescence L as detection light,

Four

It is possible to eliminate the influence of light reflected from the surface of the target region R, and it is possible to image the capillaries existing inside the inspection target region R with high contrast.

[0107] Note that the periodontal disease inspection device 100b according to Embodiment 3 includes the color filter 172 and the periodontal disease inspection device 100 according to Embodiment 1 except for the functions of the illumination device and the imaging device. Since it has the same configuration as the case, it has a corresponding effect among the effects of the periodontal disease detection device 100 according to the first embodiment.

[Embodiment 4]

FIG. 5 is a view for explaining the periodontal disease inspection device 100c according to the fourth embodiment. Fig. 5 (a) is a diagram showing the periodontal disease being examined using the periodontal disease inspection apparatus 100c, and Fig. 5 (b) is a diagram showing how the surface reflected light L reaches the light shatter 174. It is a figure

2

Fig. 5 (c) shows how the fluorescent light L reaches the light shirt 174, and Fig. 5 (d) shows the illumination.

Four

Light emission intensity and fluorescence L emission intensity and light transmission rate T of light shatter 174 are shown.

1 4 2 Figure.

A periodontal disease inspection device 100c (not shown) according to Embodiment 4 has basically the same configuration as the periodontal disease inspection device 100 according to Embodiment 1, but includes a light shirt 174. The functions of the illumination device and the imaging device are different from those of the periodontal disease inspection device 100 according to the first embodiment. That is, the periodontal disease inspection device 100c according to Embodiment 4 As shown in FIG. 5, there is further provided a light shirt 174 that does not transmit light for a predetermined first period and transmits light for a predetermined second period after the first period. In addition, as an illuminating device, an illuminating device 126c having a function of illuminating the examination site R using excitation light emitted within the first period is used, and as an imaging device, capillary blood vessels are connected via a light shirt 174. It is assumed that an imaging device 118c (not shown) having a function of taking a picture is used!

[0110] When the illumination light L (excitation light) from the illuminator 126c is reflected on the surface of the examination site R (see Fig. 5 (b)), the light (surface Reflected light L) is time delayed

2

Since it reaches the light shirt 174 within the first period, the light shirt cannot be passed. On the other hand, when the illumination light L (excitation light) passes through the surface of the inspection target region R and reaches the inside of the inspection target region (see Fig. 5 (c)), a little inside the inspection target region R. Fluorescence L is generated with a time delay of (see Fig. 5 (d)). As a result, the fluorescence L (all

4 4 (or part) can reach the light shirt 174 within the second period and pass through the light shirt 174. Therefore, according to the periodontal disease inspection device 100c according to the fourth embodiment, the fluorescence L is reflected as the detection light, and is reflected on the surface of the inspection target region R.

Four

It is possible to eliminate the influence of light, and it is possible to photograph the capillaries existing in the examination target region R with high contrast and high contrast.

[0111] The periodontal disease inspection device 100c according to Embodiment 4 includes the light shirter 174 and the periodontal disease inspection device according to Embodiment 1 except for the functions of the illumination device and the imaging device. Since it has the same configuration as the case of 100, it has a corresponding effect among the effects of the periodontal disease inspection device 100 according to the first embodiment.

[Embodiment 5]

FIG. 6 is a view for explaining the periodontal disease inspection device 100d according to the fifth embodiment. Fig. 6 (a) shows the state of the periodontal disease inspection device 100d before the disposable cylindrical spacer 176 is attached, and Fig. 6 (b) shows the disposable cylindrical spacer 176. FIG. 6 (c) is a diagram showing a state in which periodontal disease is inspected using the periodontal disease detection device 100d.

[0113] Periodontal disease inspection device 100d (not shown) according to Embodiment 5 has basically the same configuration as that of periodontal disease inspection device 100 according to Embodiment 1, but suitable for use in the oral cavity. Place This is different from the case of the periodontal disease inspection device 100 according to the first embodiment in that it further includes a fixing means for fixing the intraoral force mela to the device. The periodontal disease inspection device 100d according to the fifth embodiment includes a disposable cylindrical spacer 176 that is used by being attached to the distal end portion (head portion 116d) of the intraoral force mela 110d as a fixing means. Reference numeral 178 denotes a position adjustment protrusion formed on the inner surface of the cylindrical spacer 176 of the use / disposal type.

[0114] Therefore, according to the periodontal disease inspection device 100d according to the fifth embodiment, it is possible to obtain a high-quality captured image (particularly in the case of a moving image), and the periodontal disease inspection according to the first embodiment. Compared to the case of the apparatus 100, it is possible to obtain test results with higher quantitativeness and objectivity. In addition, with the disposable cylindrical spacer 176 attached to the distal end portion (head portion 116d) of the intraoral force mela 110d, the intraoral force mesa 110d is pressed to an appropriate position in the oral cavity, so that the oral cavity It is possible to fix the intraoral force mela 110d at an appropriate position in the inside. Furthermore, by replacing the disposable cylindrical spacer 176 for each patient, a hygienic periodontal disease test can be performed.

[0115] The periodontal disease inspection device 100d according to the fifth embodiment has a periodontal according to the first embodiment except that it further includes a fixing means for fixing the intraoral force mela at an appropriate position in the oral cavity. Since it has the same configuration as the case of the disease testing apparatus 100, it has a corresponding effect among the effects of the periodontal disease testing apparatus 100 according to the first embodiment.

[0116] Although the periodontal disease inspection device of the present invention has been described based on the above-described embodiment, the present invention is not limited to this and can be implemented without departing from the gist thereof. For example, the following modifications are possible.

(1) In the periodontal disease inspection device of the present invention, the optical system may have a function of changing the distance between the objective lens and the region R to be examined. In this case, capillary blood vessels can be imaged from various distances by changing the distance to the examination site R without moving the intraoral force mela.

(2) The periodontal disease inspection device of the present invention may further include an imaging region fine movement device capable of finely moving the imaging region. In this case, it becomes possible to precisely determine the optimum imaging range, so that it is possible to obtain a test result with higher quantitativeness and objectivity. In this case, the imaging area may be powered by moving the intraoral force mela. The internal force mela may be fixed, and the imaging region may be powered by moving the optical system. Explanation of symbols

100, 500, 600, 700, 800, 900… Periodical disease inspection device, 110, 110a, 110 (1 P P Intracavity force mesa, 112… Hand-held part, 114… Arm part, 116, 116a, 116b, 116c , 116 (1 head unit, 118 imaging device, 120 optical system, 122 imaging device, 124 amplifying unit, 126, 126a, 126b, 126c ... illumination device, 128 ... Control unit, 130, 132 ... Connection cord, 140 ... Main unit, 150 ... Image monitor, 160 ... Printer, 170 ... Polarization filter, 172 ... Color finoleta, 174 ... Light shatter, 176 ... Disposable cylindrical spacer, 178 ... Position adjustment protrusion, 501 ... Teeth, 508 ... Periodontal pocket, 511 ... Light source, 512 ... Lens, 513 ... Light for projection Fiber, 514 ... Scale, 519 ... Optical fiber for light reception, 520 ... Photodiode, 52 1 ... Signal processing unit, 522 ... Speaker, 523 ... Light source unit, 524 ... Canois for gripping, 52 5 ... Probe, 526 ... Data processing Yu 601 ... Light source, 602 ... Light source side polarizing filter, 602ρ ··· Light source side polarizing filter (p-polarized transmission type), 603 ··· Receiving side polarizing filter, 603ρ • ··· Light source side polarizing filter (ρ polarized light transmission) Type), 603s ... Light source side polarizing filter (s-polarized transmission type), 604 ... Imaging device, 606 ... Monitor, 711 ... Inspection head, 711a ... Aperture, 712, 7 13 ... Mirror, 714, 715 ... Optical fiber, 714a, 715a… Free end, 716… Objective lens, 7 20 ············································· 750 ··················· Nosunore, 76 1 ... Ikumi, 801 ... Infrared camera, 802 ... Periodontal tissue under test, 803 ... Image processing device, 80 4 ... Computer, 805 ... Monitor, 806 ... Recording reproduction device, 807 ... Thermal difference enhancement means, 808 ··· Auxiliary observation device, D… Tooth, D… Ging, D… Alveolar bone, G… Gum, L, L (ρ)

1 2 3 1 1 …… Illumination light, L, L (p) …… Surface reflection light, L (p / s)… Internal reflection light, L… Fluorescence, R… Inspection

2 2 3 4

Target part, T ... light transmission rate of color filter 172, T ... light transmission rate of light shatter 174

Claims

The scope of the claims

[1] A mouth provided with an illuminating device that illuminates a region to be examined in the oral cavity, and an imaging device that magnifies and images the capillaries included in the region to be examined illuminated by the illuminating device

13 Air force mela,

A periodontal disease inspection device comprising: an image processing device having a function of evaluating a state of a capillary vessel based on a photographed image obtained from the imaging device.

[2] In the periodontal disease inspection device according to claim 1,! /,

The image processing apparatus further has a function of measuring a flow rate of blood flowing through a capillary blood vessel.

[3] In the periodontal disease testing device according to claim 1 or 2,

The periodontal disease inspection device, wherein the image processing device further has a function of evaluating the degree of inflammation in the gingiva.

[4] The periodontal disease test apparatus according to any one of claims;! To 3,

A periodontal disease inspection device, further comprising a determination device that determines the degree of periodontal disease based on an evaluation result by the image processing device.

[5] The periodontal disease test apparatus according to any one of claims;! To 4,

The image processing apparatus has a function to determine the main imaging area based on the preliminary imaging result in the examination target part!

The intraoral force mela has a function of photographing a main photographing region determined by the image processing device.

[6] Claims;! To 5! /, In the periodontal disease testing device according to any one! /,

An apparatus for examining periodontal diseases, further comprising a fixing means for fixing the intraoral force mela at an appropriate position in the oral cavity.

[7] In the periodontal disease inspection device according to claim 6,

The periodontal disease testing device is characterized in that the fixing means is a cylindrical spacer that is used / used to be attached to the tip of the intraoral force mela.

[8] In the periodontal disease testing device according to claim 6 or 7,

A photographic area fine movement device capable of finely moving a photographic area by the imaging device; Periodontal disease inspection device characterized by this.

[9] The periodontal disease testing device according to any one of claims;! To 8,

The said illuminating device has a function which illuminates a to-be-tested site | part with the illumination light of the wavelength which raises hemoglobin in particular, The periodontal disease test | inspection apparatus characterized by the above-mentioned.

[10] The periodontal disease test apparatus according to any one of claims;! To 9,

The periodontal disease inspection device further includes a polarization filter that allows one of p-polarized light and s-polarized light to pass through,

The illumination device has a function of illuminating the inspection target site using the other polarization of p-polarized light and s-polarized light,

The periodontal disease inspection device, wherein the imaging device has a function of photographing a capillary blood vessel through the polarizing filter.

[11] The periodontal disease testing device according to any one of claims;! To 10,

The periodontal disease inspection apparatus further includes a color filter that does not pass light in a predetermined first wavelength range and passes light in a predetermined second wavelength range that is longer than the first wavelength range. The illumination device has a function of illuminating the examination site using excitation light having an emission peak in the first wavelength range,

The periodontal disease inspection device, wherein the imaging device has a function of photographing capillaries through the color filter.

[12] The periodontal disease testing device according to any one of claims 1 to 11;

The periodontal disease inspection device further includes a light shirt that does not transmit light for a predetermined first period and transmits light for a predetermined second period after the first period,

The illumination device has a function of illuminating the examination target site using excitation light emitted within the first period,

The periodontal disease inspection device, wherein the imaging device has a function of photographing capillaries through the light shirt.