JP2012005643A - Observation scope for periodontal pocket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an observation scope for a periodontal pocket, which observes the inner part of a periodontal pocket over a wide range.SOLUTION: The observation scope includes: a hand piece 10; and a chip 20 insertably connected to the hand piece 10. The chip 20 includes: a light guide for radiating light forward from the distal end of the chip 20; and an image guide for transmitting the image of a part illuminated by the light from the light guide. The chip 20 is constituted of a guide tube 24 where the light guide and the image guide are put through. An attachment 40 where the guide tube 24 is put through and which is removably mounted is arranged at the distal end of the chip 20. The attachment 40 is inserted to the periodontal pocket, to transmit the image in the front part of the light guide to the hand piece through the image guide. The attachment 40 is mounted so as to be inclination possible with respect to the through hole 40' of the guide tube 24. Thus, the inner wall of the periodontal pocket is observed over the angle of about 360°.

Description

  The present invention relates to a periodontal pocket observation scope, and more particularly to a periodontal pocket observation scope capable of performing observation in a periodontal pocket over a wide range in dental treatment, for example, in a periodontal pocket. The present invention relates to a periodontal pocket observation scope capable of confirming plaque, tartar, root fracture breakage and the like attached to a tooth root over a wide range.

  In dental treatment, for example, after cutting, shaping, and washing the tooth root, a treatment such as filling in the tooth root is performed. In this case, in order to see whether or not the inside of the tooth root is accurately cut and shaped Use scopes. Conventionally, a scope type mirror has been used. However, due to advances in electronic technology, the number of pixels of a CCD or C-MOS (solid-state image device) has increased, and a high-resolution type has been achieved. Since the color reproducibility has been improved, use of a CCD or C-MOS camera has been attempted instead of the mirror type.

  FIG. 3 is a schematic diagram of a main part (Patent Document 1) for explaining an example of a dental intraoral observation device, in which 1 is a handpiece, 2 is an image signal processing device, 3 is a display, and 4 is A cable connecting the handpiece 1 and the image signal processing device 2, and has a CCD or C-MOS camera 1 a and an LED light source 1 b at the tip of the handpiece 1, and the observed site in the oral cavity is connected by the LED light source 1 b Illuminate, the state of the part illuminated by the LED light source 1b is photographed by a CCD or C-MOS camera 1a through a lens, a filter, etc., and the photographed image is converted into an image signal. Then, the image signal is processed by the image signal processing device 2 and displayed on the display 3.

  In the intraoral observation, the operator first turns on the main switch 2a of the image signal processing device 2, and then presses an operation button provided on the handpiece 1, the image signal processing device 2 Is detected, the LED light source 1b is turned on, the CCU is driven, and the image captured by the CCD or C-MOS camera 1a is displayed on the display 3 as a moving image.

  The conventional intraoral scope is effective for observing the state of a relatively wide area such as in the oral cavity or root of a tooth. For example, the state of a narrow area such as in a root canal or a periodontal pocket is observed. In order to achieve this, a CCD or C-MOS camera is provided at the tip, so that the tip is too large to be inserted into a narrow canal or periodontal pocket. Check for root fractures in the root canal, confirmation of the root canal wall before and after root canal enlargement, and plaque, tartar, and root fracture in the periodontal pocket It was unsuitable to do.

  In view of the above circumstances, the present applicant has previously proposed an intraoral scope suitable for observing the state of a narrow region such as in a root canal or in a periodontal pocket (Patent Document 2).

  FIG. 4A is a diagram for explaining an example of an intraoral scope previously proposed by the present applicant. In the figure, 10 is a handpiece, and 20 is detachably attached to the handpiece 10. As shown in FIG. 4B, the chip 10 includes a control board (CCU) 11, a light source (LED) 12, a lens (eyepiece lens) 13, an image sensor (CCD or C-MOS) 14, and the like. The chip 20 includes a light guide 21 for receiving the light from the light source 12 and guiding it to the tip end of the chip, and an image in which an image of a portion illuminated by the light emitted from the tip of the light guide 21 is guided. An image having a guide 22 and guided through the image guide 22 is guided to the eyepiece 13, picked up by the image sensor 14, guided to the control board 11, and provided in the control board 11. Once it recorded in the same manner as the prior art, is displayed as a moving image or a still image on the display.

  FIG. 4C is an enlarged cross-sectional view showing the tip of the chip 20, where 21 is the light guide (optical fiber) described above, 22 is an image guide, and a lens is attached to the tip of the image guide 22. An (objective lens) 23 is provided, and an image of a portion illuminated by the light emitted from the light guide 21 is formed by the lens 23 and guided to the eyepiece 14 through the image guide 22, and the imaging device 14 is imaged.

  The light guide 21, the image guide 22, the objective lens 23 and the like are housed in a narrow guide tube 24, and the tip end of the tip is inserted into a narrow space such as a root canal. Since the guide tube 24 is relatively long and is easily bent when a force is applied to the distal end portion, the guide tube 24 is formed in order to avoid the damage and to prevent the guide tube 24 from being damaged. The protective tube 25 is used for protection while leaving a length sufficient to perform a predetermined operation in the oral cavity (for example, when inserted into the root canal and observing the root canal wall).

4 (D ₁ ) and 4 (D ₂ ) are sectional views taken along the line DD of the tip end of the chip. The example shown in FIG. 4 (D ₁ ) is a section of the tip of the chip having the structure as described above. In the example shown in FIG. 4 (D ₂ ), a channel (cavity tube) 26 is provided in the guide tube 24, and for example, a therapeutic laser beam is passed through the channel 26. An example is shown in which an optical fiber is inserted, washing water is passed, and drying air is passed to allow treatment as well as observation.

  FIG. 5A is an overall configuration diagram for explaining an example in which the intraoral scope shown in FIG. 3 can monitor the state in the periodontal pocket. The handpiece 10, the chip 20, and the USB cable 30. Is exactly the same as the example shown in FIG. 4, and an attachment 40 that can be inserted into the periodontal pocket is detachably attached to the tip of the tip, and the tip 40 is inserted into the periodontal pocket by the attachment 40. In the same manner as in the example shown in FIG. 4, the state in the periodontal pocket is observed and further treated.

  FIG. 5 (B) is an enlarged view of part B of FIG. 5 (A), and the attachment 40 tightly connects the washer 41 (having a hole through which the guide tube 24 is passed but not through the protective tube 25) and the guide tube 24. As shown in FIG. 5 (C), the presser member 42 having a hole to pass therethrough first passes the washer 41 from the tip end, then passes the attachment 40, and finally passes the presser member 42. It is fixed with the pressing member 42. However, the attachment 40 is rotatable around the guide tube 24 so that the attachment 40 can be adjusted to be easily put in the periodontal pocket.

  The focus of the lens 23 is adjusted to the tip F of the attachment 40 so that the state of the tip F portion of the attachment 40 can be clearly observed. Furthermore, a scale G is engraved on the attachment 40 from the tip of the attachment 40 toward the objective lens 23 so that the size of the periodontal pocket can be observed when the attachment 40 is placed in the periodontal pocket. It has become.

  Since the attachment 40 is inserted into the periodontal pocket (gap between the gingiva and the tooth), the thickness D gradually increases from the tip as shown in FIG. 5D for easy insertion. The objective lens 23 is sandwiched between the guide tube 24 and the guide tube 24 so as to extend in parallel. In addition, it is also possible to prepare a plurality of types of attachments having different shapes in the thickness direction of the extending portion, the degree of inclination, etc., and select and use a desired attachment depending on the periodontal pocket state. .

When periodontal disease progresses, gums may sag between the attachments 40 (between the extension portions 40 ₁ and 40 ₂ ), making it impossible to observe. Assuming such a case, as shown in FIG. 5 (E), one side between the extension portions 40 ₁ and 40 ₂ is occluded 40 ₃ , and the occluded side is inserted into the gingival side. Then, as described above, adverse effects caused by sagging of the gingiva can be prevented.

JP 2008-173143 A Japanese Patent Application No. 2009-229637

  In the above-mentioned periodontal pocket observation scope, the attachment 40 can be rotated around the guide tube 24. However, the orientation of the objective lens 23 cannot be changed, and only a certain region determined by the attachment 40 (objective). The image of the focal position F in front of the lens 23) was not observed, and when trying to change the observation area, the position of the attachment 40 had to be changed, which was inconvenient.

  The present invention has been made in view of the above circumstances, and for the attachment that guides the tip end portion (objective lens mounting portion) into the periodontal pocket and rotatably inserts and fixes the tip end portion, The tip tip (objective lens mounting portion) orientation and axial position can be adjusted, and the inside of the periodontal pocket can be observed over a wide range without changing the position of the attachment.

  In order to solve the above problems, the invention of claim 1 includes a handpiece and a chip that is detachably connected to the handpiece, the handpiece having a light source, and the chip is formed from the light source. A light guide that guides the received light to the tip of the chip and emits the light forward from the tip of the chip, and an image that transmits an image of a portion illuminated by the light from the light guide A guide, and the handpiece further includes an imaging means for capturing an image transmitted through the image guide, and the chip includes a guide tube through which the light guide and the image guide are inserted. The tip of the tip has an insertion hole through which the guide tube is inserted, and an attachment to which the tip of the tip is attached through the insertion hole. In the periodontal pocket observation scope in which the attachment is inserted into the periodontal pocket and an image in front of the light guide is transmitted to the handpiece through the image guide, the guide tube is provided in the attachment. And has an extension portion extending in parallel to the front from both sides sandwiching the guide tube, and the extension portion becomes thinner as the thickness in the height direction goes forward. It is characterized by being.

  According to a second aspect of the present invention, in the first aspect of the invention, the diameter of the insertion hole of the attachment is larger than the diameter of the guide tube, and the guide tube is mounted to be tiltable in the circumferential direction with respect to the insertion hole of the attachment. It is characterized by being.

  The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, the guide tube is mounted so as to be displaceable in the length direction with respect to the attachment.

  The invention of claim 4 comprises a handpiece and a chip removably connected to the handpiece. The handpiece has a light source, and the chip receives light from the light source and receives the light. A light guide that radiates toward the tip of the chip and radiates in a forward direction from the tip of the chip, and an image guide that transmits an image of a portion illuminated by light from the light guide, the hand The piece further includes an imaging unit that captures an image transmitted through the image guide, and the chip includes a light guide, a guide tube through which the image guide is inserted, and a protective tube that covers the guide tube. The guide tube protrudes from the tip of the protective tube, and a cylindrical attachment mounting member is attached to the tip of the protective tube. The cylindrical portion of the attachment mounting member is inserted through the insertion hole provided in the attachment so that the attachment can be moved in the axial direction, and the diameter of the insertion hole is set to the cylindrical portion. The cylindrical portion of the attachment mounting member can be tilted in the insertion hole.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the attachment is mounted on the cylindrical portion of the attachment mounting member so as to be movable in the axial direction.

  The present invention has been made in view of the above-described circumstances. The tip end portion (objective lens) is attached to an attachment that guides the tip end portion into the periodontal pocket and rotatably inserts and fixes the tip end portion. The radial direction and the axial position of the mounting part) can be adjusted, and the inside of the periodontal pocket can be observed over a wide range without changing the position of the attachment.

It is a block diagram for demonstrating one Example of the observation scope in a periodontal pocket by this invention. It is a block diagram for demonstrating the other Example of the periodontal pocket observation scope by this invention. It is a figure for demonstrating an example of the conventional intraoral scope. It is a figure for demonstrating the example of the intraoral scope which enabled observation in the root canal which the present applicant proposed previously. It is a figure for demonstrating the example of the intraoral scope which enabled observation in the periodontal pocket which the present applicant proposed previously.

  FIG. 1A is an overall configuration diagram for explaining an embodiment of the observation scope in the periodontal pocket according to the present invention, and the overall configuration is the same as that in the observation scope in the periodontal pocket shown in FIG. A hand piece 10 having the above functions, a chip 20 detachably attached to the hand piece 10, a USB (Universal Serial Bus) cable 30, an attachment 40, etc., but in the present invention, the attachment 40 is fixed. The objective lens 23 is variable in direction and position so that the inside of the periodontal pocket can be observed over a wide range.

FIG. 1 (B ₁ ) and FIG. 1 (B ₂ ) are enlarged views of part B of FIG. 1 (A), respectively, and 24 and 25 in FIG. Corresponding to the guide tube 24 and the protective tube 25, in the present invention, the attachment 40 can move with respect to the guide tube 24 in the axial direction and can change the direction in the radial direction. ing.

Specifically, as shown in FIG. 1 (B ₁ ), for example, the diameter of the guide tube insertion hole 40 ′ of the attachment 40 is made larger than the diameter of the guide tube 24, and the interval between the washer 41 and the pressing member 42 is increased. By making it longer than the length of the guide tube insertion hole 40 ′ of the attachment 40, as shown by the arrow Y in FIG. 1 (B ₁ ), the guide tube 24 is focused in the axial direction (depth direction of the periodontal pocket). Observation is possible in the range of distances F and F ′. Furthermore, as shown in FIG. 1 (B ₂ ), the direction of the objective lens 23 can be changed in the radial direction of the guide tube insertion hole 40 ′ of the attachment 40, and the inside of the periodontal pocket extends over a range of approximately 360 °. It is possible to observe.

In FIG. 1 (B ₁ ) and FIG. 1 (B ₂ ), by increasing the diameter of the guide tube insertion hole 40 ′ of the attachment 40, the guide tube 24 is moved away from the guide tube insertion hole 40 ′ of the attachment 40. In addition, as shown in FIG. 1 (B ₁ ) and FIG. (B ₂ ), the surface facing the washer 41 of the attachment 40 is made spherical (R ′). The guide tube 24 can be inclined more easily with respect to the guide tube insertion hole 40 ′ of the attachment 40.

  FIG. 2 is a main part configuration diagram for explaining another embodiment of the present invention, in which 45 is an attachment mounting member fixed to the tip of the protective guide 25, and the attachment mounting member 45 is an attachment. 40 has a cylindrical portion 45 ′ through which the insertion hole 40 ′ is inserted. The cylindrical portion 45 ′ is inserted into the insertion hole 40 ′ of the attachment 40, and the attachment 40 is inserted into the insertion hole 40 ′ of the attachment 40. Is attached to the cylindrical portion 45 ′ of the attachment mounting member 45, one is prevented from being removed by the flange portion 45 ′ of the attachment mounting member 45, and the other is prevented from being removed by the washer 46. It is movable in the axial direction between the flange portion 45 ′ and the washer 46, and thereby the focal position (axial position) of the objective lens 23 is set. Obtain it possible, it can be more clearly photographed the depth direction of the image of the periodontal pocket.

  Furthermore, by setting the diameter of the insertion hole 40 ′ of the attachment 40 to be larger than the diameter of the cylindrical portion 45 ′ of the attachment mounting member 45, the orientation of the objective lens 23 can be changed as in the embodiment shown in FIG. The attachment 40 can be rotated 360 ° in the circumferential direction, whereby the inner peripheral wall of the periodontal pocket can be observed over a range of approximately 360 °.

  The specific example in which the objective lens can be displaced in the axial direction of the attachment and can be changed in the radial direction with respect to the attachment inserted and fixed (positioned) in the periodontal pocket has been described above. However, the present invention is not limited to the illustrated embodiment, and the objective lens is mounted so as to be movable in the axial direction and to be changed in the radial direction by any other desired configuration. It will be easy to understand that it is possible.

  DESCRIPTION OF SYMBOLS 10 ... Handpiece, 11 ... Communication control board, 12 ... Light source, 13 ... Eyepiece, 14 ... Image sensor, 20 ... Chip, 21 ... Light guide, 22 ... Image guide, 23 ... Objective lens, 24 ... Guide tube, 25 ... Protection tube, 26 ... Hollow tube (channel), 30 ... Communication cable, 40 ... Attachment, 40 '... Guide tube insertion hole, 40 "... Spherical surface, 41 ... Washer, 42 ... Presser plate, 45 ... Attachment mounting member, 45 '... cylindrical part, 45 "... flange part, 46 ... washer.

Claims (5)

  The handpiece includes a handpiece and a chip that is removably connected to the handpiece. The handpiece has a light source, the chip receives light from the light source, and guides the received light to the tip of the chip. A light guide that radiates in a forward direction from the tip of the chip, and an image guide that transmits an image of a portion illuminated by light from the light guide, wherein the handpiece further includes the image An imaging means for imaging an image transmitted through a guide, wherein the chip is composed of a guide tube through which the light guide and the image guide are inserted, and has an insertion hole through which the guide tube is inserted at the tip of the chip; And an attachment to which the tip of the tip is attached through the insertion hole, and the attachment is inserted into the periodontal pocket. In the periodontal pocket observation scope that transmits an image in front of the light guide to the handpiece through the image guide, the guide tube is tiltably attached to an insertion hole provided in the attachment. In addition, it has an extension part extending in parallel forward from both sides sandwiching the guide tube, and the extension part becomes thinner in the height direction as it goes forward. scope. The diameter of the insertion hole of the attachment is larger than the diameter of the guide tube,
The periodontal pocket observation scope according to claim 1, wherein the guide tube is mounted so as to be tiltable in a circumferential direction with respect to the insertion hole of the attachment.   The periodontal pocket observation scope according to claim 1 or 2, wherein the guide tube is attached to the attachment so as to be displaceable in a length direction.   The handpiece includes a handpiece and a chip that is removably connected to the handpiece. The handpiece has a light source, the chip receives light from the light source, and guides the received light to the tip of the chip. A light guide that radiates in a forward direction from the tip of the chip, and an image guide that transmits an image of a portion illuminated by light from the light guide, wherein the handpiece further includes the image An image pickup means for picking up an image transmitted through a guide is provided, and the chip is composed of a guide tube through which the light guide and the image guide are inserted, and a protection tube covering the guide tube, and the guide tube is the protection tube It protrudes from the tip of the tube and has a cylindrical attachment mounting member fixed to the tip of the protective tube. An insertion hole provided in the attachment is inserted into the cylindrical portion of the attachment mounting member, the axial movement of the attachment is enabled, and the diameter of the insertion hole is larger than the diameter of the cylindrical portion. A periodontal pocket observation scope characterized in that the cylindrical portion of the attachment mounting member can be tilted in a hole.   The periodontal pocket observation scope according to claim 4, wherein the attachment is mounted on the cylindrical portion of the attachment mounting member so as to be movable in the axial direction.

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