JP3118718U - Handpiece for dental optical diagnostic equipment - Google Patents

Abstract

OCT is used for obtaining detailed optical tomographic images under the retina in ophthalmology, but in dentistry, the subject consists of hard and soft tissues such as ivory / enamel and gingiva in the tooth. Because the inside of the oral cavity is narrow and the shape varies greatly from person to person, the shape of the handpiece of the detection unit and its internal structure and operability are important for dental devices. provide.
A diagnostic signal is acquired by an optical fiber type, and a cylindrical insertion portion that contacts a tooth portion, a gradually expanding cylinder, and a large cylindrical grip portion are linearly configured, and a motor in the grip portion rotates. Then, the foremost oblique mirror rotates to scan the signal light laterally from the irradiation window to the tooth part, the rotating shaft rotates and slides by the screwing part, and the vertical and horizontal scanning is added, the motor for dental use A handpiece for a dental optical diagnostic apparatus, which replaces the handpiece motor.
[Selection] Figure 1

Description

  The present invention relates to an optical diagnostic apparatus in dental practice, and more particularly to a handpiece for a dental optical diagnostic apparatus provided with OCT (Optical coherence tomography) means.

Conventionally, the use example for diagnosis in the living body of OCT has been used to obtain an optical tomographic image of a detailed structure under the fundus retina in, for example, ophthalmology.
Further, the following documents are disclosed as probes for dental optical diagnostic apparatuses.
JP-A-2004-344260 Japanese Patent Laid-Open No. 2004-347380 JP-A-2004-344262

Dental subjects are composed of hard tissues such as dentin and enamel, and soft tissues such as gingiva, and the space in the oral cavity that can be used for diagnosis is narrow, and the shape is also individual. The difference is great.
Therefore, in the OCT apparatus that measures the reflected light from a predetermined depth of the hard and soft tissues in the oral cavity that is the subject, the shape of the handpiece that detects the reflected light, the internal structure, and the operability are particularly important. There is always a need for improvement.
The present invention provides a handpiece for a dental optical diagnostic apparatus with improved operability in addition to the literature in the disclosure of the invention.

In view of the above, the present inventors have solved the problem by the following means.
(1) A predetermined low coherent light generating means for irradiating the tooth portion of the subject,
Using the low coherent light as signal light, scanning a predetermined region of the tooth portion,
OCT that acquires an optical tomographic image of the scanning region by interference between reflected light from a predetermined depth in the scanning region and a reference light having a slight frequency difference from the signal light or phase-modulated. A dental optical diagnostic device handpiece comprising a means for connecting a small-diameter cylindrical insertion portion having a signal light irradiation window at a tip portion thereof and a cylindrical gripping portion at a rear portion thereof. A dental optical diagnostic device hand comprising a signal light reflecting oblique mirror that rotates or rotates back and forth and a signal light transmitting optical fiber in the distal end portion and the cylindrical gripping portion. piece.

(2) The optical fiber includes a collimator lens disposed at the tip of an optical fiber for signal light transmission of low-coherent light generated outside, and a signal light in front of the collimator lens that reflects the signal light upward with respect to the horizontal axis. The first reflecting mirror, the second reflecting mirror that receives the reflected light from the first reflecting mirror and reflects it in the horizontal axis direction, and further receives the reflected light from the second reflecting mirror in front of it. And an oblique mirror having an oblique mirror surface that radiates while rotating the signal light from the irradiation window provided on the tube wall surface of the distal end portion through a condenser lens. The light is configured to be transmitted to the oblique mirror, and the reflected light from the predetermined region of the tooth portion is configured to be transmitted in the reverse direction of the transmission path. The handpiece for dental optical diagnostic apparatus according to item (1).

(3) The oblique mirror is disposed in the distal end portion, and the oblique mirror includes a motor disposed in the grip portion and a rotatable long shaft connected to the motor shaft via a coupling. The dental optical diagnostic device handpiece according to item (1) or (2), wherein the dental handpiece is fixed to the tip of the dental optical diagnostic device.
(4) The oblique mirror is fixed to a distal end of a rotatable long shaft connected to a motor in the gripping portion, and is configured to rotate so that the tooth portion can be scanned in the vertical direction. The handpiece for a dental optical diagnostic apparatus according to any one of the preceding items 1 to 3, which is characterized by the following.
(5) The oblique mirror is disposed in a tip portion, and the oblique mirror is divided into a motor in the gripping portion and a front half portion and a rear half portion connected to the motor shaft via a coupling; (1) or (2) above characterized in that it is fixed to the tip of the shaft of the front half of the long shaft having a mechanism capable of rotating and sliding back and forth in the center, and rotating and sliding back and forth. A handpiece for a dental optical diagnostic apparatus as described in.
(6) The oblique mirror is fixed to the tip of the shaft of the first half of the rotating long axis, rotates with the shaft, slides back and forth and moves spirally, and performs two-dimensional scanning in the vertical and horizontal directions with respect to the tooth portion. The handpiece for a dental photodiagnosis device according to item (5), wherein the handpiece is configured to be able to perform.

(7) The dental optical diagnostic handpiece according to any one of (1) to (6), wherein a dental motor can be detachably mounted instead of the motor.
(8) The dental optical diagnostic handpiece described in any one of (1) to (7) above, wherein the condenser lens is provided close to the lower surface of the irradiation window.
(9) The dental optical diagnostic handpiece described in any one of (1) to (7) above, wherein the condenser lens is provided in close contact with the tip of the collimating lens.
(10) The above-mentioned items (1) to (9), wherein the optical fiber for transmitting the signal light is configured to transmit light superimposed with guide light for determining a photodiagnosis position of the tooth portion outside. The handpiece for a dental optical diagnostic apparatus according to any one of the above.

(11) The surface image of the tooth part is transmitted to the imaging surface of an external camera that images the tooth part in the vicinity of the arrival position of the guide light irradiated to the tooth part in order to determine the photodiagnosis position of the tooth part. And an optical fiber that transmits illumination light for illuminating the teeth imaged by the camera from an illumination light source that is also installed externally, and each tip is used as the signal light irradiation window. Proximity is arranged in close proximity to the collimating lens, and in front of each of the tips, an illumination / imaging reflecting mirror is arranged in one piece of the irradiation window integrally with the collimating lens. The handpiece for a dental optical diagnostic apparatus according to any one of (1) to (10), wherein:
(12) A camera that images a tooth near the arrival position of the guide light irradiated on the tooth to determine a photodiagnosis position of the tooth, and an illumination light source for illuminating the tooth captured by the camera Are disposed in the grip portion and connected to the light source for illumination, and an optical fiber for transmitting a surface image of a tooth portion to the imaging surface of the camera. In the vicinity of the light irradiation window, it is arranged integrally with the collimating lens, and in front of each of the tips, a reflector for illumination and imaging is arranged integrally with the collimating lens in a portion of the irradiation window. The handpiece for a dental optical diagnostic apparatus according to any one of (1) to (10) above, wherein

1. According to the devices of claims 1 to 6 of the present invention,
A handpiece for a dental optical diagnostic apparatus comprising OCT means for acquiring an optical tomographic image,
A small-diameter cylindrical insertion portion having a signal light irradiation window at the tip and a cylindrical gripping portion are connected, and inside, an oblique mirror for signal light reflection that rotates or rotates and slides, Because it has an optical fiber with a collimating lens at the tip that transmits signal light to the oblique mirror,
The optical scanner can be close to the tooth of the subject, and both signal light and reflected light are transmitted through the optical fiber.
Insertion of the handpiece tip into the oral cavity and irradiation of the signal light subject are facilitated, and reflected light from the subject can also be obtained with high accuracy.
Further, the oblique mirror rotates together with the rotating motor, and the signal light can be scanned in the vertical direction from the irradiation window to the tooth portion of the subject via the condenser lens.
Alternatively, the oblique mirror rotates and slides back and forth to move spirally, and the tooth portion can be scanned two-dimensionally in the vertical and horizontal directions.

2. According to the device of claim 7,
Instead of the motor, a dental motor can be detachably mounted.
The dental motor is a high-speed rotation motor for dental handpieces, and is easy to attach and detach, and can be equipped with a handheld dental handpiece motor without using a special motor, and is convenient and economical.
3. According to the device of claim 8,
Since the condenser lens is provided close to the lower surface of the irradiation window,
The lens is closest to the tooth portion of the subject and can obtain a clearer optical diagnostic image.
4. According to the device of claim 9,
Since the condensing lens is provided in close contact with the tip of the collimating lens, a member in which the collimating lens and the condensing lens are integrated can be adopted, and manufacturing is easy, and the tip can be downsized. .
5. According to the device of claim 10,
The optical fiber that transmits the signal light can transmit the light that is superimposed with the guide light to determine the optical diagnosis location of the tooth part, so the practitioner can visually check the arrival position of the guide light by visual inspection. Locations can be set easily, and work efficiency can be improved.

6. According to the invention of claim 11 or 12,
A camera that images the arrival position of the guide light irradiated to the tooth part to determine the photodiagnosis position of the tooth part and an illumination light source that illuminates the tooth part imaged by the camera are arranged outside the handpiece. The piece can be simplified and downsized.
Alternatively, the optical fiber tip disposed in the gripping part of the handpiece and connected to the illumination light source and the optical fiber tip for transmitting the surface image of the tooth part to the imaging surface of the camera is used as the signal light irradiation window. Items arranged close to each other can be integrated, and in both cases, the practitioner can easily determine the optical diagnosis location by an external monitor, and the work efficiency can be improved.

  The best mode for carrying out the invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view of a handpiece for dental optical diagnosis according to the present invention.
In the figure, 1 is a handpiece for dental optical diagnosis, 2 is a gripping part, 3 is a gradually expanding cylindrical part, 4 is a handpiece insertion part, 5 is an irradiation window, 6 is a window glass, 7 is an edge cover, and 41 is an exterior. Show the tube.
The external appearance of the handpiece is as follows: an irradiation window 5 that comes into contact with a tooth portion in the oral cavity, the handpiece insertion portion 4 having a small-diameter cylindrical portion, a gradually expanding cylindrical portion 3 connected thereto, and the cylindrical portion 3 The large cylindrical gripping part 2 connected to is arranged in a straight line and configured as a single body.
Then, the practitioner grasps the grip portion 2 and the front portion thereof, inserts the handpiece insertion portion 4 into the patient's oral cavity, and makes the irradiation window 5 abut on the measurement / diagnosis location of the tooth portion.

FIG. 2 is a longitudinal sectional view of a dental optical diagnostic handpiece.
In the figure, 8 is a first reflecting mirror, 9 is a second reflecting mirror, 10 is a collimating lens, 11 is a condensing lens, 12 is an optical fiber for signal light transmission, 13 is an oblique mirror, and 14 is a long-axis front portion. , 15 is a bearing, 15 'is a collar, 16 is a central portion of a long axis, 17 is an insertion portion cylinder, 18 is an insertion portion cover attaching / detaching portion, 19 is a coupling, 20 is a motor, 21 is a motor holder, and 22 is long. The rear part of the shaft, 23 is a motor cord, 40 is a joint, and 42 is an optical fiber introduction hole.

As shown in FIG. 2, the internal structure is introduced from a large-diameter cylindrical optical fiber introduction hole 42 of the gripping portion 2, and includes the gripping portion 2, the gradually expanding cylindrical portion 3, and the handpiece insertion portion 4. An optical fiber 12 for signal light transmission generated outside and disposed through the inner wall surface to the tip;
A collimating lens 10 disposed at the tip of the optical fiber 12,
A first reflecting mirror 8 disposed in front of the first reflecting mirror 8 and inclined upward to reflect the signal light upward;
A second reflecting mirror 9 that receives the reflected light from the first reflecting mirror 8 and reflects it in the major axis direction and is inclined downward, and a reflection from the second reflecting mirror 9 in front of the second reflecting mirror 9. An oblique mirror 13 is provided for receiving light and reflecting it upward and irradiating the signal light from the irradiation window 5 at the upper end of the tip while rotating it.
A condensing lens 11 for converging the reflected light from the oblique mirror 13 is provided close to the lower surface of the irradiation window 5 provided on the tube wall at the tip of the handpiece insertion portion 4 for irradiating the signal light. ing.
The oblique mirror 13 is disposed at the front end of the long-axis front portion 14, the rear end of the long-axis rear portion 22 is connected to the coupling 19, and the coupling 19 is disposed in the grip portion 2. It is connected to the motor 20.

Further, a bearing 15 disposed between the inside of the cylinder of the handpiece insertion portion 4 and the long axis central portion 16 for holding the long axis and facilitating rotation; and A collar 15 ′ for receiving the bearing 15;
When the motor 20 rotates, the oblique mirror 13 rotates through the coupling 19 and the long axis,
Through the first reflecting mirror 8 and the second reflecting mirror 9, the signal light is scanned from the irradiation window 5 to the tooth portion of the subject in the horizontal or vertical direction through the condenser lens 11.
In addition, when the oblique mirror 13 rotates and the window frame of the irradiation window 5 is removed, measurement is not performed.

Reflected light from a predetermined region of the tooth portion is taken from the signal light irradiation window 6,
It is reflected by the mirror surface of the oblique mirror 13 through the condensing lens 11 in the opposite direction, and passes through the second reflecting mirror 9 and the first reflecting mirror 8, the collimating lens 10, and the optical fiber 12, and an external optical diagnostic device ( (Not shown).
Moreover, since the light superimposed with the guide light for determining the photodiagnosis location of the tooth part can be transmitted and the practitioner confirms the arrival position of the guide light by visual observation, a member for particularly confirming is not required.

FIG. 3 is a longitudinal sectional view of a dental optical diagnostic handpiece of the surface image pickup method by the camera of FIG. 2 according to claim 12 in addition to claims 2 to 4 of the present invention.
In the figure, 24 is an illumination optical fiber, 25 is a light source, 26 is an imaging camera, 27 is a light source code, 28 is a camera code, 29 is an imaging optical fiber, and 29 'is an illumination / imaging reflector.
This figure is different from the above FIG. 2 in that the means for positioning the photodiagnostic part of the tooth part is an imaging method using a camera.
An imaging camera 26 for obtaining a surface image and an illumination light source 25 for illuminating the imaging location of the camera are disposed inside the large-diameter cylindrical portion,
In addition, an illumination optical fiber 24 connected to the illumination light source 25 and an imaging optical fiber 29 that transmits the surface image of the tooth portion to the imaging surface of the camera are close to the irradiation window 5 at their respective tips. Arranged,
In front of each tip, an illumination / imaging reflecting mirror 29 'is disposed in a portion of the irradiation window 5, and the surface image of the tooth portion of the subject is displayed on the external monitor together with the guide light. It can be observed on a monitor (not shown), or only the surface image can be observed with the guide light turned off.
In this embodiment as well, it is possible to visually check the diagnostic part of the tooth by irradiating the guide light.
Further, the imaging camera 26 for surface image acquisition and the illumination light source 25 are taken out of the handpiece, and the optical fiber for imaging and the optical fiber for illumination are pulled out from the optical fiber inlet 42 of the handpiece, thereby The structure in the piece may be simplified.

FIG. 4 is a longitudinal sectional view of a dental optical diagnostic handpiece having a rotating and sliding mechanism according to claim 5 of the present invention. The appearance is the same as in FIG.
FIG. 4A is a detailed enlarged view of the rotation and slide mechanism portion of FIG.
In the figure, 11 'is a condensing lens, 14' is the long axis of the first half, 22 'is the long axis of the second half, 30 is a threaded portion, 31' is a movable cylinder, 32 is a long hole, and 32 'is a small protrusion. , Indicate.
In the internal structure, FIG. 4 differs from FIG. 2 in that the oblique mirror is connected to the motor in the gripping part and the long axis (16: FIG. 2) connected to the motor shaft via a coupling. Is divided into a long axis 14 ′ and a long axis 22 ′ of the latter half, and has a mechanism (FIG. 4 (a)) capable of rotating and sliding back and forth at the center, and at the tip of the front half 14 ′ of the long axis. That is, the condensing lens 11 ′ is disposed at the tip of the collimating lens 10 of the optical fiber 12.

The mechanism capable of rotating and sliding back and forth is as shown in FIG. 4 and (FIG. 4 (a)).
A slidable cylinder 31 ′ is provided on the outer periphery of the end portion of the second long axis 22 ′, and a long hole 32 is bored in the cylinder 31 ′. A small protrusion 32 ′ that regulates the stop position before and after the slide projecting from the end of “′” is exposed.
Further, a screwing portion 30 made of a movable cylindrical portion having a screw having an outer peripheral surface screwed is fixed to a front end of the slidable cylinder 31 ′.
The threaded portion 30 is further fixed to the rear end of the long axis 14 'in the first half,
Furthermore, since it is disposed so as to mesh with a screw threaded on a part of the inner periphery of the cylindrical portion of the handpiece insertion portion 4,
When the latter long shaft 22 'is rotated forward and backward by the motor 20, the screwing portion 30 is rotated and moved back and forth at the same time. Therefore, the front half long shaft 14' fixed to the front end and the front end tilted. The mirror 13 also rotates forward and backward and slides back and forth.

Further, in order to hold the front and rear long axes and facilitate rotation, they are arranged on the inner side of the cylinder of the handpiece insertion portion 4 and the front and rear ends of the front long axis 14 'and the rear long axis 22'. A bearing 15 provided and a collar 15 ′ for receiving the bearing 15 are provided. ,
As described above, the oblique mirror 13 slides back and forth while rotating and moves in a spiral manner, and the signal light can be scanned vertically and horizontally from the irradiation window to the tooth portion.

In this case, the condensing lens is in close contact with the tip of the collimating lens, but the condensing lens may be provided close to the lower surface of the irradiation window.
Moreover, the transmission of the reflected light from the tooth portion of the subject and the positioning of the optical diagnosis location are the same as described in FIG.

FIG. 5 is a longitudinal sectional view of a dental optical diagnostic handpiece according to claim 5 of the present invention, in which a surface image is captured by the camera of FIG.
In this embodiment, the means for positioning the photodiagnosis portion of the tooth portion is a surface image pickup method using a camera, and the structure and operation are the same as those in FIG.

FIG. 6 is an external perspective view of a dental optical diagnostic handpiece to which a dental motor according to claim 7 is attached.
In the figure, 37 is an optical fiber outer tube, 38 is a dental motor section insertion hole, and 39 is a dental motor cord outer tube.
The external appearance of the handpiece is connected to the irradiation window 5 that contacts the tooth portion in the oral cavity, the insertion portion 4 having a small-diameter cylindrical portion, the gradually expanding cylindrical portion 3 connected thereto, and the cylindrical portion 3. The large cylindrical holding portion 2 and a signal light transmitting optical fiber outer tube 37 provided at the lower portion of the holding portion 2 are arranged in a straight line and formed as a single body.
Then, the practitioner grasps the grip portion 2 and the front portion thereof, inserts the handpiece insertion portion 4 into the patient's oral cavity, and makes the irradiation window 5 abut on the measurement / diagnosis location of the tooth portion.

FIG. 7 is a longitudinal sectional view of a dental optical diagnostic handpiece to which the dental motor of FIG. 6 is attached.
In the figure, 33 is a rotary shaft holder, 34 is a clutch, 35 is a dental handpiece motor, and 36 is an optical fiber introduction hole.
As shown in FIG. 7, the internal structure is introduced from the introduction hole 36 of the optical fiber for signal light transmission provided in the lower part of the large-diameter cylinder of the grip portion 2, and the grip portion 2 and the gradually expanding cylindrical portion 3. And an optical fiber 12 for signal light transmission generated outside and disposed to the tip through the inner wall surface of the handpiece insertion portion 4;
A collimating lens 10 disposed at the tip of the optical fiber 12, a condenser lens 11 ′ at the tip of the lens 10,
A first reflecting mirror 8 disposed in front of the first reflecting mirror 8 and inclined upward to reflect the signal light upward;
A second reflecting mirror 9 that receives the reflected light from the first reflecting mirror 8 and reflects it in the major axis direction and is inclined downward, and a reflection from the second reflecting mirror 9 in front of the second reflecting mirror 9. An oblique mirror 13 is provided for receiving light and reflecting it upward and irradiating the signal light from the irradiation window 5 at the upper end of the tip while rotating it.
An irradiation window 5 is provided on the tube wall at the tip of the handpiece insertion portion 4 that irradiates the signal light from the oblique mirror 13.
The oblique mirror 13 is disposed at the front end of the long-axis front portion 14, the rear end of the long-axis rear portion 22 is connected to the clutch 34, and the clutch 34 is disposed in the grip portion 2. Is connected to the motor 35.

Further, a bearing 15 disposed in the front and back between the inside of the cylinder of the insertion portion 4 and the long axis central portion 16 for holding the long axis and facilitating the rotation, and the same bearing 15 having a collar 15 ′ for receiving 15,
When the motor 20 rotates, the oblique mirror 13 rotates through the clutch 34 and the long shaft,
Further, the signal light reflected by the oblique mirror 13 is scanned from the irradiation window 5 to the tooth portion of the subject in the horizontal or vertical direction via the first reflecting mirror 8 and the second reflecting mirror 9. .
In addition, when the oblique mirror 13 rotates and the window frame of the irradiation window 5 is removed, measurement is not performed.

Furthermore, in this case, the condenser lens is in close contact with the tip of the collimating lens.
A condensing lens may be provided close to the lower surface of the irradiation window.
Moreover, the transmission of the reflected light from the tooth portion of the subject and the positioning of the optical diagnostic part are the same as described in FIG.

FIG. 8 is a longitudinal sectional view of a dental optical diagnostic handpiece of the surface image capturing method by the camera of FIG. 7 according to claim 5 of the present invention.
In this embodiment, the means for positioning the photodiagnosis portion of the tooth portion is a surface image pickup method using a camera, and the structure and operation are the same as those in FIG.

FIG. 9 is a longitudinal sectional view of a dental optical diagnostic handpiece having the rotation and sliding mechanism of FIG. 7 according to claims 5 and 7 of the present invention.
The appearance is the same as the dental optical diagnostic handpiece of FIG.
The oblique mirror 13 is disposed in the distal end portion, and the oblique mirror 13 is connected to the dental motor 35 in the gripping portion and the shaft of the dental motor 35 via the clutch 34 in the first half. 14 'and the latter half long axis 22' are fixed to the front end of the front half long axis 14 'having a mechanism (Fig. 4 (a)) capable of rotating and sliding back and forth at the center. Yes.
The oblique mirror 13 rotates with the shaft and slides back and forth to move in a spiral manner, and is configured to perform two-dimensional scanning in the vertical and horizontal directions with respect to the tooth portion.
In this embodiment, the condensing lens 11 is provided close to the lower surface of the irradiation window, but may be provided in close contact with the tip of the collimating lens 10 (11 ′ in FIG. 7).
As described above (FIG. 4), the means for positioning the photodiagnostic portion of the tooth portion is a guide light visual method.

FIG. 10 is a longitudinal cross-sectional view of a dental optical diagnostic handpiece of the surface image pickup method using the camera of FIG.
In this embodiment, the means for positioning the photodiagnosis portion of the tooth portion is a surface image pickup method using a camera, and the structure and operation are the same as those in FIG.

External perspective view of dental optical diagnostic handpiece of the present invention Longitudinal section of a handpiece for dental optical diagnosis FIG. 2 is a longitudinal sectional view of a dental optical diagnostic handpiece using a surface imaging method with the camera of FIG. Longitudinal sectional view of a dental optical diagnostic handpiece having a rotating and sliding mechanism Detailed enlarged view of the rotation and slide mechanism of FIG. 4 is a longitudinal sectional view of a dental optical diagnostic handpiece of the surface image pickup method by the camera of FIG. Appearance perspective view of dental optical diagnostic handpiece with dental motor attached Fig. 6 is a longitudinal sectional view of a dental optical diagnostic handpiece to which the dental motor of Fig. 6 is attached. Fig. 7 is a longitudinal sectional view of a dental optical diagnostic handpiece of the surface image pickup method using the camera of Fig. 7. FIG. 7 is a longitudinal sectional view of a dental optical diagnostic handpiece having the rotating and sliding mechanism of FIG. FIG. 9 is a longitudinal sectional view of a handpiece for dental optical diagnosis using a surface image pickup method by the camera of FIG.

Explanation of symbols

1: Dental light diagnostic handpiece 2: Grasping part 3: Gradually expanding cylindrical part 4: Handpiece insertion part 5: Irradiation window 6: Window glass 7: Edge cover 8: First reflecting mirror 9: Second reflection Mirror 10: Collimating lens 11, 11 ': Condensing lens 12: Optical fiber 13 for transmitting signal light: Oblique mirror 14: Long axis front part 14': First long axis 15: Bearing 15 ': Color 16: Long axis Central part 17: Insertion part cylinder 18: Insertion part cover attaching / detaching part 19: Coupling 20: Motor 21: Motor holder 22: Long axis rear part 22 ': Second half long axis 23: Motor cord 24: Optical fiber 25 for illumination: Light source 26: Imaging camera 27: Light source code 28: Camera code 29: Imaging optical fiber 29 ': Illumination / imaging reflecting mirror 30: Screwing portion 31': Movable cylinder 32: Long hole 32 ': Small Protrusion 33: Rotating shaft holder 34: Clutch 35: Teeth Motor part 36 of the medical handpiece: optical fiber introduction hole 37: optical fiber outer tube 38: motor part insertion hole 39: motor cord outer tube 40: joint 41: outer tube 42: optical fiber introduction hole

Claims (12)

A means for generating predetermined low-coherent light for irradiating the teeth of the subject;
Using the low coherent light as signal light, scanning a predetermined region of the tooth portion,
OCT that acquires an optical tomographic image of the scanning region by interference between reflected light from a predetermined depth in the scanning region and a reference light having a slight frequency difference from the signal light or phase-modulated. A dental optical diagnostic handpiece comprising:
A small-diameter cylindrical insertion part having a signal light irradiation window at the tip part, and a cylindrical grip part connected to the rear part,
For the dental optical diagnostic apparatus characterized in that the distal end portion and the cylindrical gripping portion are provided with an oblique mirror for signal light reflection that rotates or slides back and forth and an optical fiber for signal light transmission. Hand piece. The optical fiber is a collimating lens disposed at the tip of an optical fiber for signal light transmission of low-coherent light generated outside;
A first reflecting mirror for reflecting the front signal light upward with respect to the horizontal axis;
A second reflecting mirror that receives the reflected light from the first reflecting mirror and reflects it in the horizontal axis direction;
Further, in front of it, the reflected light from the second reflecting mirror is received, reflected upward with respect to the horizontal axis, and signal light is emitted from an irradiation window provided on the tube wall surface of the distal end portion via a condenser lens. And an oblique mirror having an oblique mirror surface that irradiates while rotating, and is configured to transmit signal light to the oblique mirror,
2. The handpiece for a dental optical diagnostic apparatus according to claim 1, wherein reflected light from a predetermined region of the tooth portion is transmitted along the transmission path in the reverse direction. The oblique mirror is disposed in the tip,
3. The oblique mirror is fixed to a motor disposed in the grip portion and a distal end of a rotatable long shaft connected to the motor shaft via a coupling. A handpiece for a dental optical diagnostic apparatus as described in. The oblique mirror is fixed to the tip of a rotatable long shaft connected to a motor in the gripping part,
The dental optical diagnostic device handpiece according to any one of claims 1 to 3, wherein the dental optical diagnostic device handpiece is configured to rotate and perform scanning in a longitudinal direction with respect to a tooth portion. The oblique mirror is disposed in the tip,
The oblique mirror is divided into a front half part and a rear half part connected to the motor in the gripping part and the motor shaft through a coupling, and a long axis having a mechanism capable of rotating and sliding back and forth in the central part. The dental optical diagnostic device handpiece according to claim 1, wherein the dental optical diagnostic device handpiece is fixed to the tip of the front half shaft, and rotates and slides back and forth.   The oblique mirror rotates with the major axis of the first half and slides back and forth to move the mirror surface in a spiral manner, and is configured to perform two-dimensional scanning in the vertical and horizontal directions with respect to the tooth portion. The handpiece for dental optical diagnostic apparatus according to claim 5.   The dental light diagnostic apparatus handpiece according to any one of claims 1 to 6, wherein a dental motor can be detachably mounted instead of the motor.   The dental light diagnostic apparatus handpiece according to any one of claims 1 to 7, wherein the condensing lens is provided close to a lower surface of the irradiation window.   The dental light diagnostic apparatus handpiece according to any one of claims 1 to 7, wherein the condenser lens is provided in close contact with the tip of the collimating lens.   The optical fiber for transmitting the signal light is configured to transmit light superimposed with guide light for determining a photodiagnosis position of the tooth portion outside. A handpiece for a dental optical diagnostic apparatus as described in 1. In order to transmit the surface image of the tooth part to the imaging surface of an external camera that images the tooth part near the arrival position of the guide light irradiated to the tooth part in order to determine the optical diagnosis location of the tooth part An optical fiber and an optical fiber that transmits illumination light for illuminating a tooth portion imaged by the camera from an illumination light source that is also installed externally have respective tips close to the signal light irradiation window. Arranged integrally with the collimating lens,
The illumination / imaging reflecting mirror is disposed integrally with the collimating lens in one area of the irradiation window in front of each tip. The handpiece for a dental optical diagnostic apparatus according to Item. A camera that images a tooth near the arrival position of the guide light irradiated on the tooth to determine a photodiagnosis location of the tooth, and an illumination light source for illuminating the tooth captured by the camera An optical fiber disposed in the grip portion and connected to the illumination light source;
An optical fiber for transmitting the surface image of the tooth portion to the imaging surface of the camera,
Each tip is arranged close to the signal light irradiation window and integrally with the collimating lens, and in front of each tip, a reflecting mirror for illumination / imaging is provided in a portion of the irradiation window. The handpiece for a dental optical diagnostic apparatus according to any one of claims 1 to 10, wherein the handpiece for a dental optical diagnostic apparatus according to any one of claims 1 to 10 is provided.