JP6312071B2 - Medical drill unit and drill and medical processing device - Google Patents

Description

  The present invention relates to a medical drill unit, a drill used for the drill unit, and a medical processing apparatus, and more particularly to a drill unit and a drill used for drilling bone such as a jawbone and a medical processing apparatus.

  In general, in surgical treatment, there is a scene where it is required to drill a bone, and in particular, in the field of dental and oral surgery, it is necessary to drill a jaw bone for so-called implant treatment. Implant treatment is a treatment method in which the jaw bone is drilled, metal is embedded, and the denture is fixed as an artificial tooth root (implant) when the denture is embedded in the jaw bone. Reaching the tube may damage the alveolar nerve inside the alveolar tube or the alveolar artery or alveolar vein. Depending on the extent of the damage, massive bleeding or neuropathy may be caused. Further, even when a bone other than the jawbone is drilled, the bone must be drilled so as not to damage the bone marrow or blood vessels existing inside the bone.

  Conventionally, there has been a technique related to a drill device with an endoscope as a device for confirming a state when cutting bone (Patent Document 1). This technology enables drilling work while observing the cutting state with an endoscope, and uses a drill formed transparently on the side facing the part to be cut. It is fixed to a device other than a drill, and an insertion hole for inserting an endoscope is provided to face the tip of the drill, and a picture of the part to be cut can be obtained through a transparent drill part. It was a possible configuration.

Japanese Patent Laid-Open No. 03-224553 JP 2010-142537 A

  However, the above prior art is capable of observing the cutting state with an endoscope through a transparent drill tip portion (a portion on the side facing the portion to be cut). It was not possible to detect whether or not the tip was close to a site where a blood vessel or the like was present. In particular, in implant treatment, it is important not to reach the alveolar tube of the jawbone, and it was not so important to observe the state during cutting in other situations endoscopically.

  In recent implant treatments, CT images of the patient's jaws are taken preoperatively to grasp the position of the alveolar canal three-dimensionally, and a surgical guide based on the CT images is prepared. Limiting the position and depth is performed (see Patent Document 2). However, even if this method is used, it does not detect that the drill reaches the alveolar tube, so the photographed CT image or the surgical guide produced differs from the actual alveolar tube. In this case, the tip of the drill may reach the alveolar tube even if the difference is slight.

  Therefore, the present invention has been made in view of the above-mentioned points, and its purpose is to detect a position where a blood vessel or the like inside a bone such as a jawbone is present when drilling in a bone such as a jawbone. To provide a medical drill unit capable of capturing an optical detection signal from a workpiece and transmitting it to an analysis device, a drill used for the drill unit, and a medical processing device using the medical drill unit. It is.

Therefore, in order to achieve the above object, the medical drill unit according to claim 1 is a medical drill unit optically connected to an optical analysis device including a light source and a light detection means. A unit main body having a drive unit driven by a drive source, and an interior of a covering unit formed on the unit main body and formed along the unit main body, the tip of which is detachable from the unit main body be those that are arranged in, comprising: a first optical transmission section for transmitting light from the optical analysis device driver, a blade portion that cutting edge continuously shank and which is formed A drill having a drill body and detachably mounted on the drive unit so as to have an axis in a direction intersecting the unit body; and the drill incorporated in the drill body of the drill and the drill A second optical transmission unit that is rotated with driving and capable of transmitting light between the vicinity of the shank proximal end and the vicinity of the blade tip, and the first optical transmission unit and the second optical transmission unit. And an optical coupling means disposed inside the unit main body, and the first optical transmission unit is disposed in the vicinity of the proximal end of the shank, and includes an incident region and an output region. And a member that refracts light incident from the incident region to change the traveling direction of the light and emits the light from the emitting region toward the second optical transmission unit , and a tip portion. Has a shape protruding from the covering portion, and when the covering portion comes into contact with the unit body, it enters the unit body and is optically coupled to the optical coupling means .

  The present invention relating to the drill unit according to claim 2 is the medical drill unit according to claim 1, further comprising a drive unit side end of the first optical transmission unit held by the unit main body. First condensing means provided continuously, and second condensing means provided continuously at the shank proximal end of the second light transmission portion incorporated in the drill body. The first condensing means and the second condensing means are arranged with their end faces facing each other.

  The invention related to the medical drill unit according to claim 3 is the medical drill unit according to claim 1 or 2, wherein the optical coupling means is composed of a coupling oil by a refractive index matching agent. is there.

  The medical drill unit according to claim 4 is the medical drill unit according to any one of claims 1 to 3, wherein the optical analysis device is an optical coherence tomograph, An optical interference signal is acquired from the return light and the reference light transmitted from the second optical transmission unit and applied to the workpiece, and a different phase portion of the workpiece is detected.

  The medical drill unit according to claim 5 is the medical drill unit according to any one of claims 1 to 4, wherein the drive source is provided inside the unit body. It is what.

  The medical drill unit according to claim 6 is the medical drill unit according to any one of claims 1 to 5, wherein the drive source is a motor or an air turbine, and the unit body is a hand. It is composed of a piece housing.

The medical drill unit according to claim 7 is the medical drill according to any one of claims 1 to 6, wherein the driving portion is a cylindrical rotating portion that allows insertion of the shank. And a drive portion provided with a contact portion that contacts a part of the shank and positions at a predetermined position in the rotation portion, and the unit main body has a through hole in which the rotation portion is rotatably held. When the rotating part is held in the through hole, the base end of the shank inserted into the rotating part is arranged in the vicinity of one open end of the through hole. The first optical transmission unit is a first optical transmission unit that is held outside the unit main body and can reach the vicinity of the opening end of the through hole in which the shank base end is disposed. It is composed.

The invention according to claim 8 is the drill used in the medical drill unit according to any one of claims 1 to 7 , wherein the shank and the blade portion in which a cutting edge is continuously formed are formed. A drill main body, a through hole provided along the axial center of the drill main body and having an opening at a shank base end and a blade front end, and a second optical transmission unit disposed in the through hole It is equipped with.

The invention according to a ninth aspect is the drill according to the eighth aspect , wherein a member having translucency is disposed on a tip end side of the through hole, and the second The end of the light transmission part on the tip side of the blade part is disposed so as to reach the member.

The invention according to a tenth aspect of the invention is the drill according to the eighth or ninth aspect , wherein the blade portion of the drill body is a twist type blade portion formed by forming a cutting blade in a spiral shape. The through hole has an opening on the tip end side of the blade portion at the chisel edge.

The invention according to an eleventh aspect is the drill according to any one of the eighth to tenth aspects, further comprising a third assembly that is continuous with the end portion of the second optical transmission portion on the tip side of the blade portion. A light means is provided.

The invention concerning the medical processing apparatus of Claim 12 is a medical processing apparatus provided with the medical drill unit in any one of Claim 1 thru | or 7 , Comprising: Light is sent out to the said medical drill unit. A light source, a light detection means for detecting the return light of the light emitted from the medical drill unit and applied to the workpiece, and a specific element derived from the state of the light detected by the light detection means. And a processing device for processing optical information, wherein the processing device is a processing device for detecting a heterogeneous portion inside the workpiece based on the optical information.

The medical processing device according to claim 13 is the medical processing device according to claim 12 , wherein the processing device performs processing of the workpiece from the detected position information of the different phase portion. It comprises means for calculating the thickness of the target portion, and notifying means for notifying the calculation result.

  According to the medical drill unit of claim 1, the light transmitted from the optical analysis device can be sent to the second optical transmission unit built in the drill body via the first optical transmission unit. It is possible to irradiate the workpiece with light transmitted from the tip of the second light transmission unit built in the drill body. Further, part of the light reflected inside the workpiece (hereinafter sometimes referred to as return light) is incident on the second optical transmission unit, and optical analysis is performed via the first optical transmission unit. It is received by the device. Thereby, a drill main body can be functioned as a probe in an optical analyzer. Therefore, it is usually necessary to provide the probe as a member other than the drill in order to check the state of processing by the drill, but it is necessary to provide the probe as a device separate from the drill body by using the drill body as a probe. There is no. Even if the drill body is being cut, light is transmitted by the first and second light transmission units, so that optical analysis can be performed while cutting is continued. Note that the cutting by the drill does not have to be continued, and the optical analysis may be performed while the processing is interrupted while the processing is interrupted.

  The first optical transmission unit is held in the unit main body, but the second optical transmission unit is built in the drill main body, and the drill is driven (for example, rotationally driven). Therefore, when both optical transmission parts are physically connected, the operation is hindered by adding an extra addition to the drill. Will come. Therefore, by interposing the optical coupling part between the two optical transmission parts, the first optical transmission part of the unit main body and the second optical transmission part incorporated in the drill main body become physically independent. .

Thus, even if a light transmission path is formed between the optical analysis device and the vicinity of the tip of the drill body, the drill operation is not hindered. Furthermore, since the first optical transmission unit and the second optical transmission unit are optically connected via the optical coupling unit, both can be easily and satisfactorily optically connected. Furthermore, since the first optical transmission unit and the optical coupling means can be built in the unit main body, the first optical transmission unit and the optical coupling unit can be optically coupled to the second optical transmission unit in a light-shielded space inside the unit main body. Further, since the position of the optical coupling means is fixed, the optical coupling state can be easily formed by mounting the drill body provided with the second optical transmission unit at a predetermined position. .

  Therefore, for example, when using this medical drill unit to drill a bone such as a jawbone, the medical drill unit is connected to an optical analysis device, so that the light source of the optical analysis device is used as a light source. An optical analysis device for using the infrared rays and irradiating the work to be cut through the first and second optical transmission units to receive the return light received through the first and second optical transmission units It can be detected by the light detection means. Then, the internal phase of the workpiece can be confirmed by analysis based on the detection result of the return light detected by the light detection means.

  By confirming this different phase, the operator can recognize blood vessels and the like existing in the bone such as the jawbone, and in particular, can grasp the position of the alveolar tube in the jawbone. From this, during drilling of the jawbone with the drill body, it is detected that the tip of the drill body has approached the alveolar tube, and the drilling is stopped before reaching the alveolar tube, thereby damaging the alveolar tube. It can be avoided.

  According to the medical drill unit of the second aspect, in addition to the effect of the invention of the first aspect, the light transmitted between the first optical transmission unit and the second optical transmission unit is the first Light that has passed through the first and second light condensing means is transmitted. Here, when the incident light is parallel light, the first and second condensing means have a function of converging the incident light, and converged light (light having a small beam diameter) is incident thereon. In this case, it has the property of diffusing it into parallel light (increasing the beam diameter). Therefore, the converged light continuously passing through the first and second light collecting means is diffused into parallel light by one light collecting means, and the parallel light is converged by the other light collecting means. Therefore, the light transmitted from the first optical transmission unit first passes through the first light collecting unit, is diffused into parallel light, and further passes through the second light collecting unit to converge the light that has converged to the second. To the optical transmission unit. On the contrary, the light transmitted from the second light transmission unit passes through the second light collecting means, is diffused into parallel light, and further passes through the first light collecting means to converge the light that has converged. 1 to the optical transmission unit. Thereby, the light transmitted from the first and second optical transmission units can be easily coupled. In addition, since the light in the middle of the first and second light collecting means is in a diverged state (a state in which the beam diameter is increased), the light coupling can be easily performed without precisely matching the centers of the two light collecting means. An effect can be obtained.

  As this condensing means, a gradient index (GRIN) lens can be used. When a GRIN lens is used, the refractive index inside thereof is different between the central portion and the peripheral portion, so that the light diverging from the center of the optical path can be changed to parallel light, and this is provided in two optical transmission portions. Thus, an optical coupling effect between the two optical transmission units can be obtained.

  According to the medical drill unit of claim 3, in addition to the effect of the invention of claim 1 or 2, the first optical transmission unit on the fixed side and the second optical transmission unit on the drive side The optical coupling between them can be made suitable. That is, when the drill body is driven to rotate about the axis and the second optical transmission unit rotates about the axis along with this, the end of the first optical transmission unit and the end of the second optical transmission unit Since the coupling oil, which is a fluid, is interposed between the two, the wear of the end portions of both optical transmission units can be suppressed.

  According to the medical drill unit of claim 4, in addition to the effect of the invention of any of claims 1 to 3, as an optical analysis device, optical coherence tomography (OCT: Optical Coherence Tomography) Since the optical coherence tomography is used, the position of the internal structure can be analyzed by causing the weak light reflected inside the workpiece to interfere with the reference light.

  If the OCT method is employed as described above, the position of the different phase inside the workpiece can be grasped, and the thickness of the workpiece can be detected when drilling in the workpiece. When the perforated hole approaches a blood vessel or the like inside a bone such as a jawbone, it is possible to avoid the perforation from reaching the blood vessel or the like by stopping the perforation operation.

  According to the medical drill unit of the fifth aspect, in addition to the effect of the invention of any one of the first to fourth aspects, the transmission path of the driving force from the driving source to the driving unit can be simplified. The driving or stopping of the drill mounted on the driving unit can be immediately operated. That is, by minimizing the transmission member for transmitting the driving force, the inertial force of the transmission member immediately after the drive source starts driving or stops driving can be reduced. The time delay of the transmission of the driving force due to can be suppressed. Therefore, when the bone is drilled, if the tip of the drill body is thin on the back surface of the bone, the driving of the drill can be immediately stopped.

  According to the medical drill unit of claim 6, in addition to the effect of the invention of any one of claims 1 to 5, the drill body can be configured to be continuously provided on the handpiece, Even in the case of drilling in a narrow part that is not sufficiently opened, the drill body can reach a desired position. In this case, by using an air turbine as a drive source for the drill body, compressed air widely used in dental and oral surgery can be used. It can be used when drilling. In addition, when the rotational speed of the drill main body by an air turbine is high speed, it is good also as a structure which decelerates mechanically and it may replace with an air turbine and a motor may be used. When a motor is used as the drive source, the rotation speed can be adjusted according to the performance of the motor.

  In addition, in the configuration in which the motor is provided inside the unit main body, it is possible to configure the drive unit as a rotor of the motor by disposing a permanent magnet around the drive unit and providing a coil unit around the permanent magnet. It becomes. In this case, the drive unit can be rotated by supplying power to the coil unit, and the drive state of the drive unit can be controlled by supplying and stopping the power. It can be operated quickly.

According to the medical drill unit of the seventh aspect , in addition to the effect of the invention of any one of the first to sixth aspects, the first optical transmission unit is held outside the unit main body, and the end surface of the unit main body The second optical transmission unit can be optically coupled in the vicinity, and the unit main body can be reduced in size. That is, when this drill is used for drilling of the jawbone, the unit body to which the drill body provided with the second light transmission portion is to be mounted is strongly requested to be small because it is inserted into the oral cavity. With a simple configuration, the request can be met. In this case, since the shank is positioned by the abutting part of the rotating part, the drill body provided with the second light transmission part can be arranged at the predetermined position of the base end of the shank. The relative positional relationship of can always be stabilized.

According to the drill of claim 8 , since the second optical transmission unit is disposed in the through hole provided along the axis of the drill, the second optical transmission is performed when the drill is driven to rotate. The part stays at the axis of the drill and rotates around the axis. Thereby, it can suppress that the weight balance of the whole rotating drill collapses largely, and can stabilize the cutting by a drill.

According to the drill of the ninth aspect , in addition to the effect of the invention of the eighth aspect , the tip of the second optical transmission part can be disposed in the vicinity of the tip of the blade part of the drill body. When irradiating light from the tip of the part, the irradiation position is in the vicinity of the tip of the drill part of the drill body, and when drilling with a drill, light is emitted from the tip of the blade part of the drill body inserted in the drilled part. Can be irradiated. Thereby, attenuation of the irradiated light and the reflected return light can be reduced. Therefore, in the case of using an optical analysis device that has a light source capable of transmitting light to the second optical transmission unit and receives reflected light and performs optical analysis, the deepest position of the drilled hole Light can be emitted from (that is, a position close to the object to be analyzed), and return light reflected inside the front can be acquired. Light irradiation suitable for optical analysis and reception of return light can be performed. It becomes possible.

According to the drill of the tenth aspect , in addition to the effect of the invention according to the eighth or ninth aspect , since the kerf is formed in the blade portion of the drill body, when the workpiece is cut, The generated chips can be discharged from the cutting portion. In addition, by forming the opening of the through hole in the chisel edge, the tip of the second optical transmission unit can be disposed at the tip of the blade. Thereby, the return light acquired by the second optical transmission unit can be processed as reflected light acquired at the tip of the drill, and the positional relationship between the tip position of the drill and the internal structure of the bone is measured more accurately. can do.

According to the drill of the eleventh aspect , in addition to the effect of the invention of any one of the eighth to tenth aspects, the third light condensing means is provided on the tip end side of the drill, thereby providing the second light. It is possible to collect and irradiate the light transmitted to the tip of the transmission unit and to collect the light reflected from the workpiece. In the above, an optical fiber can be used as the second optical transmission unit, and the above-described GRIN lens can be used as the light condensing means. If the GRIN lens is used, the light transmitted by the optical fiber can be concentratedly irradiated, and the return light can be collected and led to the core of the optical fiber.

According to the medical processing apparatus of the twelfth aspect , the light is transmitted to the medical drill unit according to the first to seventh aspects, and the light transmitted from the medical drill unit is received. The different phase part inside the workpiece can be detected from the state of the received light. Here, by detecting the position of the out-of-phase part, when cutting the workpiece, the boundary between the part to be processed and the part not to be processed can be detected. It is possible to grasp the remaining thickness state that can be processed with respect to the thickness. Therefore, if this device is used when drilling a bone such as a jawbone, it can be determined whether or not the deepest part of the hole to be drilled reaches a blood vessel or the like inside the bone. In the middle of the drilling process, it can be determined whether or not the drilling can be continued.

According to the medical processing device of the thirteenth aspect , in addition to the effect of the invention of the twelfth aspect , based on the detection result of the position of the different phase portion, the thickness of the processing target portion of the workpiece Information can be obtained. When the notification method is by sound, the timbre may be changed depending on the thickness. In the case of this configuration, the operator can determine whether or not processing is possible while referring to the notified information. Moreover, it is good also as a structure which alert | reports only when the allowable range of the thickness which can be processed is input into a processing apparatus previously, and the limit of the said allowable range is reached. In this case, the operator can continue the processing until notified by the notification means. Furthermore, when the notification means is configured to be linked to the drive source of the drill body of the medical drill unit, the drive is stopped when the thickness of the portion to be drilled reaches a limit value. You can also.

It is explanatory drawing which shows the outline of 1st embodiment of the invention concerning a medical drill unit. It is explanatory drawing which shows the outline of an optical analyzer, and also shows the usage type of embodiment of a medical drill unit. It is explanatory drawing which shows the outline of 2nd embodiment of the invention concerning a medical drill unit. It is explanatory drawing which shows the outline of 3rd embodiment of the invention concerning a medical drill unit. It is explanatory drawing which shows the outline of 4th embodiment of the invention concerning a medical drill unit. It is explanatory drawing which shows the outline of 4th embodiment of the invention concerning a medical drill unit. An outline of a drill main part used for an embodiment of an invention concerning a drill is shown, (a) is a front view, (b) is a right view of (a), (c) is IIIC- of (b) It is an expanded sectional view of a IIIC portion. It is explanatory drawing of embodiment of the invention concerning a drill. It is explanatory drawing which shows the modification of embodiment concerning a drill. It is explanatory drawing which shows the other modification of embodiment concerning a drill. It is a graph which shows the experimental result by the optical analysis apparatus using the OCT method.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Drawing 1 is an explanatory view showing the outline of the first embodiment of the invention concerning a medical drill unit. As shown in this figure, the present embodiment includes a unit main body 1 and a drill main body 2. The unit main body 1 includes a drive unit 3, and the base of the drill main body 2 is a chuck 4. Can be installed.

  The unit main body 1 of the present embodiment is provided with a first optical transmission unit 5 that is optically connected to an optical analysis device that is an external device. A condensing unit 51 is continuously provided at the tip of the first optical transmission unit 5, and an end surface of the condensing unit 51 is provided so as to reach the driving unit 3. Here, in the present embodiment, an optical fiber is used as the first optical transmission unit 5 and a GRIN lens 51 is used as the light condensing means 51 at the tip.

The drill body 2 of the present embodiment has a second optical transmission unit 6 built therein. The second light transmission unit 6 is provided along the axial center of the drill body 2, and the light collecting means 61 is continuously provided at the tip thereof. The condensing means 61 is arranged so that the end surface thereof faces the end surface of the condensing means 51 of the first optical transmission unit 5 in a state where the drill main body 2 is mounted on the unit main body 1. Yes. In the present embodiment, an optical fiber is also used for the second optical transmission unit 6, and a GRIN lens is used for the light collecting means 61.
That is, a continuous waveguide is formed from the optical analysis device to the tip of the drill, but the first optical transmission unit 5 and the second optical transmission unit 6 are formed separately and are not continuous as an object. It has become.

The condensing means 51 and 61 provided at the distal ends of the first and second optical transmission units 5 and 6 are optically connected in the driving unit 3 of the unit main body 1, and an optical coupling unit is provided between them. 7 is interposed. The optical coupling portion 7 is configured to be optically coupled by the coupling oil, and a liquid reservoir portion is formed in the driving unit 3 so that the coupling oil is kept in the middle between the two light collecting means 51 and 61. In addition, as the optical coupling part 7, it is not limited to coupling oil. Any material having translucency can be used as the optical coupling portion 7. For example, the optical coupling unit 7 may be configured by an air layer in which a gap is formed between the two light collecting units 51 and 61. Further, a light-transmitting liquid, sol, or gel may be used. Water or glycerin solution can be used as the liquid, and silicone or mineral oil can be used as the oil. If the refractive index of the optical coupling unit 7 is different from the refractive index of the optical transmission units 5 and 6, the transmitted light is reflected by the end surfaces of the light collecting means 51 and 61, and the amount of reflected light is not transmitted. Since it will be lost, it is preferable to use a refractive index adjusting agent in order to match the refractive index.
The optical coupling part is preferably formed with a minute gap. This minute gap is not limited to the case where a minute gap is formed between both end surfaces as a result of the accuracy when the concentrating light collecting means 51 and 61 are arranged. In some cases, the two light collecting means 51 and 61 are arranged so as to form.

  In this way, the lengths of the condensing means (GRIN lenses) 51 and 61 that face each other via the optical coupling unit 7 are adjusted according to the refractive index in order to adjust the focal position, and both the GRIN lenses 51 and 61 are adjusted. Thus, the light collection rate is set to 0.5 pitch. As a result, the light transmitted from the first optical transmission unit (optical fiber) 5 can be incident as parallel light on the second optical transmission unit (optical fiber) 6 while being condensed, and the second The light transmitted from the optical transmission unit (optical fiber) 6 can be incident on the first optical transmission unit (optical fiber) 5 while being condensed. Therefore, the optical transmission units 5 and 6 that are not physically continuous can be optically connected. That is, an optical coupling effect can be obtained.

  The drive unit 3 of the present embodiment is rotatably held by the unit body 1 via a bearing. The drive unit 3 constitutes a part of the electric motor (motor core). That is, the drive main body 31 is formed in a substantially cylindrical shape, and a permanent magnet 32 is fixed to the outer periphery thereof. On the unit body 1 side, a coil portion 33 is provided in the vicinity of the permanent magnet 32, and power is supplied to the coil portion 33 via the power cord 30, whereby the permanent magnet of the drive portion body 31 is provided. 32 is guided as a core of the motor and is driven to rotate like the motor. Therefore, the driving unit 3 is given a rotational driving force without providing a transmission mechanism with the motor as a driving source.

In addition, a drill holding portion 34 whose outer shape is tapered is formed at the tip of the cylindrical drive main body portion 31 of the drive portion 3. The drill holding portion 34 has a plurality of slits (not shown) formed in the axial direction of the drive main body portion 31 and has a diameter that changes in the range of the gap between the slits. The chuck 4 is a collet type that engages with the tapered outer portion of the drill holding portion 34, and the inner diameter of the drill holding portion 34 is reduced by attaching and detaching the chuck 4 to and from the drill holding portion 34. It has a structure that changes. By inserting the shank part 21 of the drill body 2 into the drill holding part 34 and mounting the chuck 4, the drill body 2 and the drive part 3 can be rotated integrally.
As the drill body 2 rotates, the built-in second optical transmission unit 6 also rotates integrally. However, as described above, the first optical transmission unit 5 and the second optical transmission unit 6 are separate. Since it is formed and is discontinuous as an object, it does not hinder the rotation operation. In addition, since the first optical transmission unit 5 and the second optical transmission unit 6 are optically continuous by the optical coupling unit, between the optical analysis device and the tip of the drill body 2, Light (optical signal) can be transmitted smoothly.

  The other end of the second light transmission unit 6 built in the drill body 2 is arranged so as to reach the vicinity of the tip of the blade part of the drill body 2, and the light transmitted to the second light transmission unit 6. Is irradiated from the front end side of the blade part of the drill main body 2 and light (return light) reflected inside the workpiece can be incident. Details will be described in the embodiment of the drill.

  Since the present embodiment is configured as described above, the first optical transmission unit 5 transmits the light transmitted from the optical analysis device, which is an external device, and the condensing means 51 and 61 and the optical coupling unit 7 are transmitted. It is transmitted to the second optical transmission unit 6 via. And the light transmitted to the 2nd optical transmission part 6 will be irradiated from the front-end | tip (tip of the drill main body 2). The return light is incident from the tip of the second optical transmission unit 6, is transmitted in the reverse direction through the transmission path, and is returned to the optical analyzer.

  Here, an outline of an optical coherence tomography (OCT) analyzer will be described as an example of the optical analyzer. This analyzer can be used by optically connecting to the embodiment of the drill unit. FIG. 2 is a diagram showing an outline thereof. As shown in this figure, the optical analysis apparatus A includes a light source 81 by a super luminescent diode (SLD) that emits low-coherence light, and the light from the light source 81 is branched into two optical transmission paths by an optical coupler 82. . One of the branched lights is used as reference light, and is irradiated onto the reference mirror 84 via the lens 83. The return light reflected by the reference mirror 84 is again returned to the photodetector 85 via the optical coupler 82. Detected. The other light is used for measurement, is irradiated onto the object from the probe B, and its return light is detected by the light detection unit 85 via the optical coupler 82. The light detected by the light detection unit is caused to interfere with the interferometer 86, thereby converting the position of the internal structure of different depth into light intensity versus distance information (interference signal), and further processing the interference information into the processing device 87. The state of the internal structure is analyzed. Note that a general personal computer is used for the processing device 87.

  In FIG. 2, the reference mirror 84 is shown as a variable mirror provided so that the distance from the lens 83 can be varied. Although the movement amount of the reference mirror 84 is not shown, it is output to the processing device 87, and the state of the internal structure is analyzed together with the movement amount. However, the variable mirror is intended to cause light to interfere with the interferometer 86. For example, the return light from the probe B and the reference light are individually detected, and the intensity of the light of both is simply determined. When the light intensity versus distance can be measured by comparison, a configuration in which the position of the reference mirror 84 is fixed may be used.

  In this embodiment, the drill body 2 for drilling is used as the probe B of the optical analysis apparatus A. That is, the measurement light from the optical analyzer B is sent to the drill unit 1, and the measurement light is applied to the workpiece (for example, the mandible) C from the tip of the drill body 2. Further, the return light reflected inside the workpiece (for example, the mandible) C is incident from the tip of the drill body 2, and the return light is sent to the optical analyzer A through the drill unit 1.

  In the above case, since the internal structure of the workpiece can be detected based on the light reflected inside the tip of the drill body 2 used for cutting, for example, the mandible C is cut. When processing, the position of the alveolar canal D existing inside the mandible C can be grasped, and the thickness of the portion cut by the drill body 2 can be recognized. Thereby, the judgment material of whether the process by the drill main body 2 is continued or stopped can be obtained. And if the remaining part cut by the drill main body 2 becomes thin and it is detected that the front-end | tip of the drill main body 2 approached the alveolar tube D, a user should stop the cutting by the drill main body 2. Can be judged. Further, the processing device 87 sequentially detects the thickness of a portion (processing target portion) to be cut by the drill body 2, and uses the limit thickness that allows drilling by the drill body 2 as a threshold value in advance. It is good also as a structure which makes the processing apparatus 87 judge whether the thickness of the process target part reached | attained the threshold value by setting to the apparatus 87. FIG. In this case, by interlocking the notification means, it is possible to make the user aware that the thickness of the part to be processed has reached the threshold value or just before that. Furthermore, it is good also as a structure which controls the drive of a drill main body by the processing apparatus 87, In this case, when the process target part reaches a limit value, it can be controlled to stop the drive of the drill main body 2. .

  As described above, the drill main body 2 used in the drill unit of this embodiment functions as the probe B of the analyzer A by connecting the analysis device by OCT to the drill unit of this embodiment.

  In addition, as described above, by using the drill unit of the present embodiment to analyze by the optical analyzer, that is, by configuring the medical processing apparatus using the drill unit of the present embodiment, the drill The internal structure ahead of the surface with which the tip of the drill body abuts can be detected based on the return light of the light sent from the unit and applied to the workpiece. For example, when a bone such as a jawbone is cut using a drill unit, a different phase can be confirmed by an analysis by an analysis apparatus together with the cutting process. By detecting the position of the different phase, the jaw bone, etc. It is possible to recognize blood vessels and the like existing inside the bones, and in particular, it is possible to grasp the position of the alveolar tube in the jawbone. The drill unit is not limited to the above-described drilling of the jaw bone, and may be used, for example, to drill a bone of each part such as a skull or a vertebra.

  Next, a second embodiment of the invention relating to the medical drill unit will be described. An outline of this embodiment is shown in FIG. As shown in this figure, the present embodiment is a dental drill unit, and the unit main body 101 is composed of a handpiece housing. The handpiece body 111 is hollow, and the first optical transmission unit 105 is disposed in this hollow portion. However, the vicinity of the tip and the light collecting means 151 are fixed at the handpiece tip 112.

  Further, the drive unit 103 is built in the handpiece distal end portion 112, and an air turbine 132 is fixed to the outer peripheral portion of the drive unit main body 131. Therefore, the drive unit main body 131 is rotationally driven by the rotation of the air turbine. In order to supply compressed air to the air turbine, an air supply pipe 113 is disposed in a hollow portion of the handpiece main body 111. The tip of the air supply pipe 113 is open, and compressed air can be blown onto the blades of the air turbine. The compressed air frequently used in dental treatment is supplied, and the rotation and stop of the drive unit main body 131 are performed by the operation of supplying and stopping the compressed air.

  In the above configuration, the first optical transmission unit 105 is greatly curved inside the handpiece tip 112. When an optical fiber is used as the optical transmission unit 105, the bending radius that the optical fiber is allowed to be used. It is required to bend within the range of (curvature). Then, when it is necessary to bend an ordinary optical fiber beyond an allowable curvature, an optical fiber having a small allowable curvature may be selected such as a hole assist optical fiber.

  The drive unit 103 can be mounted with the drill main body 2 by the collet chuck 4, and the drill main body 2 has a configuration in which the second optical transmission unit 6 is built in the first embodiment. It is the same.

  Thus, by incorporating the drive unit 103 in the handpiece distal end portion 112, it can be used in the case of drilling the jawbone in a dental or oral surgery treatment (so-called implant treatment). In particular, when used by a dentist, the drill body 2 can be driven by the operation of supplying / stopping compressed air, which makes it easy to learn how to use it.

  Furthermore, 3rd embodiment of the invention concerning a medical drill unit is described. An outline of this embodiment is shown in FIG. As shown in this figure, also in this embodiment, the unit body 201 uses a handpiece housing. In the hollow portion of the handpiece main body 211, an air supply pipe 213 for supplying compressed air is disposed, and an air turbine 214 and a bevel gear 215 continuous therewith are provided. When compressed air is supplied from the air supply pipe 213, the air turbine 214 rotates and the bevel gear 215 can further rotate. In addition, a bevel gear 233 is fixed to the outer periphery of the drive unit main body 231, and the bevel gear 233 is meshed with the bevel gear 215 that is continuous with the air turbine 214 to change the rotation direction. In addition, the rotation speed is reduced and transmitted to the drive unit main body 231.

  As described above, the air turbine 214 built in the handpiece main body 211 is used as a driving source, and the handpiece main body 211 is arranged in a direction orthogonal to the axis of the drill main body 2 by a mechanism that transmits this to the driving main body 211. can do. Moreover, since the rotational speed by the air turbine 241 can be decelerated, the drill body 2 is rotated at a relatively low speed, and overcutting of the drill body 2 can be suppressed in cutting that should be performed carefully.

  Also in this embodiment, when the first optical transmission unit 205 is an optical fiber, a hole assist optical fiber that allows a small curvature can be used. In addition, in the present embodiment, the drive unit 203 can be mounted with the drill body 2 by the collet chuck 4, and the drill body 2 has a configuration in which the second optical transmission unit 6 is built in. Is the same as in the first embodiment.

  Next, a fourth embodiment of the invention relating to the medical drill unit will be described. 5 and 6 are schematic views of the present embodiment. FIG. 5 shows a state in which the first optical transmission unit and the second optical transmission unit are detached from the unit main body, and FIG. Shows the state of wearing. As shown in these drawings, the present embodiment does not include a drive source in the unit main body 301, and drives the rotating unit 303 by a driving force transmitted from the outside. One optical transmission unit 305 is held outside the unit main body 301. The driving source generates a driving force by a motor or an air turbine (not shown) outside the unit main body 301, and transmits the rotational driving force to the unit main body 301 (handpiece tip 312). The rotational driving force transmitted from the driving source to the handpiece main body 311 is converted in the rotation direction by the bevel gear 315 provided in the handpiece main body 311 and transmitted to the rotating unit 303 disposed inside the handpiece tip 312. It is what is done.

  By the way, the rotation part 303 of this embodiment becomes a structure formed in the cylinder shape, and is hold | maintained in the state penetrated to the through-hole 313 provided in the front-end | tip 312 of a handpiece. The through hole 313 is provided so as to penetrate in the axial direction when the drill body 2 is mounted, and the rotating portion 303 is mounted over substantially the entire through hole 313 through hole 313. Further, the rotary shaft 303 has a concave and convex shape on the outer surface, and is partially held inside the through hole 313 via the bearings 336 and 337, and the bearings 336 and 337 are fitted into the concave and convex portions. As a result, the position of the rotating unit 303 is kept constant.

  The rotating portion 303 is provided with an abutting portion 335, and the abutting portion 335 can position the shank 21 of the drill body 2 inserted into the through hole. The contact portion 335 is formed so that the proximal end 21a of the shank 21 to be positioned is disposed in the vicinity of one opening end of the rotating portion 303 (that is, one opening end of the through hole 313). is there. Therefore, in the present embodiment, the contact portion 335 is configured to partially close the opening at one opening end of the cylindrical rotating portion 303. As a result, one end of the through hole 313 is partially blocked. Further, the contact portion 335 is provided with a communication hole 307 at substantially the center thereof, and the blocking state of the through hole 313 by the contact portion 335 is a state in which the communication hole 307 is opened. It has become. Further, the other end of the rotating part 303 is opened so that the shank 21 of the drill body 2 can be inserted into the rotating part 303.

  With the above configuration, the drill body 2 is positioned by inserting the shank 21 of the drill body 2 into the rotating portion 303 and bringing the proximal end 21a of the shank 21 into contact with the contact portion 335. And the 2nd optical transmission part 6 provided in the inside will be arrange | positioned in a predetermined position. In addition, the contact part 335 is not limited to the structure which contact | abuts the base end 21a of the shank 21 as mentioned above, The structure contact | abutted in the arbitrary positions of the axial direction of the shank 21 may be sufficient. In this case, the shape of the shank 21 is a stepped shape with different outer diameters, and the base end 21a side of the shank 21 is made small in diameter, so that the end portion of the large diameter portion comes into contact with the contact portion 335, and the shank 21 Will be positioned. And since the base end 21a side has a small diameter, the base end 21a can pass through the abutting portion 335 and reach further ahead in the state of positioning as described above. By such a positioning method of the shank 21, it is possible to arbitrarily set the position where the base end 21a is to be arranged. The position of the base end 21a may be on the surface of the unit main body 301 or on the outside of the unit main body 301 in addition to the inside of the unit main body 301.

  On the other hand, the first optical transmission unit 305 is disposed outside the unit main body 301, and a covering unit 350 that covers the first optical transmission unit 305 is attached to the outer surface of the unit main body 301. Thus, the unit main body 301 holds the unit. Further, the tip of the covering portion 350 is configured to be detachable from the handpiece tip 312, and by attaching the tip portion to the handpiece tip 312, the first optical transmission unit 305 is placed inside the unit main body 301 (rotation). The contact portion 335) provided in the portion 303 can be reached. Note that the covering portion 350 may be configured to be detachable from the unit main body 301.

  Note that the first optical transmission unit 305 is configured to optically continue the light transmitted by the two optical transmission units 305a and 305b through a mirror 305c in order to transmit light with a greatly changed angle. That is, the mirror 305c is built in the vicinity of the tip of the covering portion 350, and the optical transmission portions 305a and 305b are disposed on both sides via the mirror 305c. The light transmission direction can be adjusted by the reflection angle by the mirror 305c, but in this embodiment, the reflection angle of the mirror 305c is 45 ° in order to change the light transmission direction by 90 °. The two optical transmission units 305a and 305b both use optical fibers, and the optical transmission unit 305b provided in front of the mirror 305c has a tip portion that reaches the communication unit 307 of the contact unit 335. It has become. That is, the optical coupling with the second optical transmission unit 6 is enabled by the optical coupling part formed between the shank base end 21 a of the drill body 2.

  In the present embodiment, as shown in FIG. 6, in a state where the tips of the shank 21 and the covering portion 350 of the drill main body 2 are attached to the unit main body 301, the first optical transmission unit 305 (front light Each of the transmission unit 305 b) and the second optical transmission unit 6 reaches the abutting part 335 provided in the rotating unit 303, and the tip thereof is optically coupled through the communication hole 307. Therefore, this communication hole 307 functions as an optical coupling means, and an optical coupling portion by an air layer is formed by forming a gap between the tips of the two optical transmission units 6 and 305. Note that, as in the first embodiment, the gap can be filled with a light-transmitting liquid, sol, or gel. In addition, it is good also as a structure which provides a condensing means in the front-end | tip of both the optical transmission parts 6 and 305, In this case, a GRIN lens can be used similarly to 1st embodiment.

  Since the present embodiment is configured as described above, the first optical transmission unit 305 and the second optical transmission unit 6 can be detached from the unit main body 301, and the unit main body 301 can have a simple structure. it can. Thereby, the unit main body 301 (especially the front-end | tip part 312 of a handpiece) can be reduced in size. The optical coupling means (communication hole) 307 is provided in the contact portion 335 provided in the rotating portion 303, and the contact portion 335 connects the first optical transmission portion 305 (the tip of the covering portion 350) to the unit main body. Since it is exposed to the outside in a state of being detached from 301, it becomes easy to fill the optical coupling means 307 with a refractive index adjusting agent. The second optical transmission unit 6 can be easily replaced by exchanging the drill body, but the first optical transmission unit 305 can also be replaced by being detached from the unit main body 301.

  Next, an embodiment of a drill used in the above-described medical drill unit will be described by exemplifying a twist drill. FIG. 7A is an overall view of the drill body in the present embodiment, FIG. 7B is a view showing a tip portion of the drill body, and FIG. 7C is an enlarged sectional view of the tip portion of the drill body. is there. In the twist drill constituting this embodiment, as shown in this figure, the drill body 2 is composed of a shank 21 and a blade portion 22 formed continuously therewith. The blade portion 22 is provided with a kerf 23 and a cutting blade 24, and can be drilled when the drill body 2 is driven to rotate about its axis. The kerf 23 is capable of forming a rake angle of the cutting edge 24 and removing chips. In the case of a twist drill, the kerf 23 is formed in a spiral shape, so that chips generated when cutting the workpiece can be removed backward (in the direction of the shank 21) from the tip of the drill body 2. it can.

  The drill body 2 has a small-diameter through hole 25 formed along the axial center, and both ends thereof form openings 26 and 27 that open on the shank side and the blade tip side. . The opening 27 on the distal end side of the blade part is formed at the chisel edge, and is opened at the center and the distal end of the blade part 22. By setting the diameter of the drill body 2 to 2 mm to 5 mm, it can be used for drilling in implant treatment. In this case, the diameter of the through hole is set to 0.2 mm to 0.5 mm so as not to affect the drilling function of the drill. Further, the through hole 25 is formed along the axis of the drill body 2, and when the drill body 2 is rotationally driven, the same hole shape is maintained in the axis. ing.

  As shown in FIG. 8, an optical fiber 91 as an optical transmission unit is disposed in the through hole 25 of the drill body 2. The optical fiber 91 is inserted into the through hole 25 and, like the through hole 25, when the drill body 2 is driven to rotate, the optical fiber 91 is maintained at the same position without shaking in the axial center. is there. The optical fiber 91 corresponds to the second optical transmission unit 6 in the embodiment of the drill unit.

  Further, GRIN lenses 92 and 93 as light collecting means are connected to both ends of the optical fiber 91. The GRIN lens 92 provided on the proximal end side of the shank 21 corresponds to the light collecting means provided in the second optical transmission unit 6 of the drill unit, and is on the drive unit side where the drill body 2 is mounted. An optical coupling effect can be obtained together with another GRIN lens.

  On the other hand, the GRIN lens 93 provided on the distal end side of the blade portion 22 is adjusted to a length corresponding to the refractive index so that the light collection rate is 0.5 pitch independently. Accordingly, it is possible to irradiate the workpiece while condensing the light transmitted to the optical fiber 91, and to collect the light reflected back inside the workpiece (return light) and to collect the light again. It can enter the fiber 91. Thereby, weak return light can be incident.

  Although the present embodiment is configured as described above, as shown in FIG. 8, the distal end side opening portion 27 of the blade portion 22 is further replaced with a transparent plate member (protective member) 94. It is good also as a structure closed by. Thus, by providing the protection member 94, the tip of the GRIN lens 93 provided on the tip side of the blade portion 22 can be protected. Further, a recess 95 for storing liquid may be provided at the tip of the drill body 2 on the shank side. This can be made to function in order to store the coupling oil when the coupling oil is used as the optical coupling portion in the embodiment of the drill unit described above.

  Further, in the present embodiment, the through holes 25 are formed with the same inner diameter, but in order to hold the GRIN lenses 92 and 93, the diameter may be larger than the range in which the optical fiber 91 is provided. In this case, the GRIN lenses 92 and 93 are integrally formed by fusing both ends of the optical fiber 91, and the GRIN lenses 92 and 93 at both ends are fixed, so that the entire optical fiber is placed inside the drill body 2. It may be fixed.

  As described above, according to the present embodiment related to the drill, the tip of the optical fiber 91 can be disposed at the tip of the blade portion 22 of the drill body 2, and when the analysis is performed by the optical analyzer, the drill The main body can function as a probe. In particular, since the tip of the blade portion 22 of the drill body 2 is located at the deepest penetration portion when cutting (drilling), the position of the tip of the optical fiber 91 (or the end face of the GRIN lens 93) is determined as the drill body. By arranging it near the chisel edge of 2, the position of the tip of the drill body 2 and the internal structure ahead of it can be detected. This makes it very easy to determine how far the blade portion should be advanced.

  In addition, each embodiment shown above is an illustration of this invention and is not limited to these. As an optical analysis apparatus in the above embodiment, an analysis apparatus using OCT is exemplified. However, if the medical drill unit of the present invention can be used for analysis based on the return light transmitted, the type of analysis means is used. Does not matter. For example, an analysis unit that detects a different phase by obtaining optical information based on physical properties such as light absorption and emission at the drill tip may be used. For example, when this is stained in advance with a fluorescent dye that specifically binds to a different phase and the optical signal (fluorescence intensity) can be greatly detected, it can be seen that the drill tip has advanced into that phase. By applying the drill or drill unit of the present invention to the treatment of caries, teeth can be cut while viewing the caries portion as a tomographic image, and cutting work can be performed while confirming the discoloration of the caries portion. If the discolored portion in the tooth tissue can no longer be detected by the probe, it may be possible to complete the cutting.

  Furthermore, in the fourth embodiment (see FIG. 5), the drive source is configured to be provided outside the unit main body 301. However, the unit main body 301 (including a grip portion to which the main body portion 311 of the handpiece is attached) is provided. It is good also as a structure which installs a motor inside and transmits the driving force by this motor to the rotation part 303. FIG. It is good also as a structure which incorporates a motor in a holding part.

  Also in the first embodiment, the driving unit 3 may be rotated by the motor built in the gripping unit as described above. That is, in the first embodiment, the motor by the permanent magnet 32 and the coil 33 is formed around the drive unit 3. However, such a motor is not provided, and the power source of the motor built in the grip unit is provided in the drive unit 3. It is configured to transmit. With such a configuration, it is possible to reduce the size by simplifying the structure around the drive unit 3.

  Also, when it is difficult to drill a long through hole with a small diameter in the drill body 2, as shown in FIG. 9, a hole having a slightly larger diameter is drilled in most of the drill body 102. It is good also as a drill of the form which is provided and a small diameter hole is drilled in the front-end | tip of the blade part 122. In this case, a gap is formed between the large-diameter hole and the optical fiber 191 disposed therein, and a spacer made of synthetic resin is inserted into this gap, or the gap is formed by an adhesive. It is possible to place the optical fiber 191 at the center of the drill body 102 by filling As shown in the figure, a GRIN lens 193 may be provided continuously at the tip of the optical fiber 191 on the blade side.

  Further, as shown in the figure, a protective member 194 is provided at the tip of the blade portion 122 as in the above embodiment, but the diameter of the portion where the protective member 194 is mounted is the tip of the optical fiber 191 on the blade portion side. Alternatively, it is slightly larger than the hole (minimum aperture) in which the GRIN lens 193 is disposed. And the protection member 194 is comprised by the magnitude | size which fits into the said hole, and is comprised so that it may contact | abut to the opening end of a minimum aperture hole. This is because when the protective member 194 is attached to the distal end of the blade portion 122, the protective member 194 is inserted into the hole from the distal end side, so that the attachment position of the protective member 194 is determined. Furthermore, there is also an effect that the protective member 194 is not moved to the shank 121 by a reaction force received at the tip of the drill body 102 during processing by the drill.

  Furthermore, as shown in FIG. 10, the configuration of the tip of the blade portion 222 of the drill body 202 may be changed. For example, as shown in FIG. 10A, a protective member may not be provided at the tip of the blade 222, and the end of the optical fiber 291 may be provided at the tip of the blade 222. This is because even if the light collecting means is not provided, the effect of the present invention can be obtained if the predetermined light is irradiated from the optical fiber and the return light can be incident. Further, as shown in FIG. 10B, a GRIN lens 293 that is continuous to the tip of the optical fiber 291 on the blade side may be provided, and the end of the GRIN lens 293 may be arranged at the tip of the blade 222. Even in this case, the light condensed from the GRIN lens 293 is irradiated and the return hole can be acquired.

[Experimental example]
Hereinafter, experimental examples when using an optical analysis apparatus based on OCT will be described. In this experiment, the relationship between the thickness of the jaw bone and the intensity of the interference signal was examined using chicken long bones. As the optical analysis apparatus, an optical analysis apparatus illustrated as an example in FIG. 2 was used. In order to clearly detect the relationship between the thickness of the interference signal and the thickness of the bone, different parts of the thickness are used from the bones of different parts. An experiment was conducted as to whether or not it could be detected.

  The experimental results are shown in FIG. However, in the graph shown in this figure, the horizontal axis represents the movement distance of a reference mirror (indicated as a reference mirror in the figure) for obtaining reference light used for optical interference, and the vertical axis represents the intensity of the interference signal. FIG. 11 (a) is a result of a portion having a thick bone, FIG. 11 (b) is a result of a portion having a thin bone, and FIG. 11 (c) is a simple plastic plate material. The result about one sheet is shown.

  As shown in this figure, in the case of a thick bone, a strong interference signal indicating the position of the bone immediately before the probe is present, followed by a portion where the interference signal is relatively small. In a state where the small wave of the interference signal continues for a relatively long time (FIG. 11A), it is indicated that there is a distance from the bone to the space layer. On the other hand, in the case of a thin bone, the small wave of the interference signal becomes short, indicating that the space inside the bone is approaching (FIG. 11B). In the experimental results for the resin plate, not the bone, the small wave of the interference signal has disappeared (FIG. 11 (c)). Thus, by monitoring the length of the weak interference signal wave following the strong interference signal wave, the position of the out-of-phase portion can be detected, and the bone thickness can be detected from the information.

  From the above results, it is clear that when the bone is drilled, the interference signal changes as the bone thickness decreases. Can be recognized. Note that it is determined that the cutting state can be notified by providing an alarm means in the processing apparatus used in the optical analysis apparatus. For example, the allowable amount that can be cut is set in advance for the length of the weak interference signal wave, that is, the length of the moving distance of the reference mirror in the range in which the interference signal is output, and when this allowable amount is reached. If it is configured to emit an alarm sound, cutting can be stopped before the drill reaches the space inside the bone. This warning sound is configured to change the tone color so that the approaching state is noticed step by step, and to notify the state close to the allowable amount, the approaching state, and the reached state by the tone color. it can.

DESCRIPTION OF SYMBOLS 1 Unit main body 2 Drill main body 3 Drive part 4 Chuck 5 1st optical transmission part (1st optical fiber)
6 Second optical transmission unit (second optical fiber)
7 Optical coupling portion 21 Shank 22 Blade portion 23 Groove 24 Cutting blade 25 Through hole 26, 27 Opening portion 31 Drive portion main body 32 Permanent magnet 33 Coil 51, 61 Condensing means (GRIN lens)
91 Optical transmission part (optical fiber)
92,93 Condensing means (GRIN lens)
94 Protection means (plate member)
A Optical analysis device B Probe C Jawbone D Alveolar tube

Claims (13)

A medical drill unit optically connected to an optical analysis device comprising a light source and light detection means,
A unit body having a drive unit driven by a drive source;
It is those that tip portion is formed along the said unit body is held in the unit body is disposed inside the covering portion provided so as to be spaced with respect to the unit body, the optical analysis device A first optical transmission unit for transmitting light from the drive unit;
A drill body having a shank and a drill body provided with a blade portion continuously formed with a shank, and a drill detachably mounted on the drive section so as to have an axis in a direction intersecting the unit body;
A second optical transmission unit incorporated in the drill body of the drill and rotated in accordance with the driving of the drill, and capable of transmitting light between the vicinity of the shank proximal end and the vicinity of the blade tip;
An optical coupling means disposed between the first optical transmission unit and the second optical transmission unit and disposed inside the unit body ,
Furthermore, the first optical transmission unit is disposed near the proximal end of the shank, and has an incident region and an exit region, and refracts light incident from the incident region to transmit light. A member that changes a traveling direction and emits light from the emission region in the direction of the second optical transmission unit, has a shape in which a tip part projects from the covering part, and the covering part is formed on the unit body. A medical drill unit characterized in that when it abuts, it enters the unit main body and is optically coupled to the optical coupling means .   First condensing means provided continuously at the drive side end of the first optical transmission unit held by the unit main body, and the second optical transmission unit incorporated in the drill main body. Second condensing means provided continuously at the end of the shank base end side, and the first condensing means and the second condensing means are arranged with their end faces facing each other. The medical drill unit according to claim 1.   The medical drill unit according to claim 1 or 2, wherein the optical coupling means is a coupling oil as a refractive index matching agent.   The optical analysis device is an optical coherence tomometer, acquires an optical interference signal from the return light and the reference light transmitted from the second optical transmission unit and irradiated onto the workpiece, The medical drill unit according to any one of claims 1 to 3, wherein the medical drill unit is an optical analysis device that detects a different phase portion of a cut object.   The medical drill unit according to any one of claims 1 to 4, wherein the driving source is provided inside the unit main body.   The medical drill unit according to any one of claims 1 to 5, wherein the drive source is a motor or an air turbine, and the unit main body is a housing of a handpiece. The drive unit is a drive unit including a cylindrical rotating unit that allows insertion of the shank, and a contact unit that contacts a part of the shank and positions the shank at a predetermined position in the rotating unit,
The unit main body has a through hole in which the rotating part is rotatably held. When the rotating part is held in the through hole, the base end of the shank inserted into the rotating part is passed through the through hole. It is formed to be placed near the open end of one of the holes,
The first optical transmission unit is a first optical transmission unit that is held outside the unit main body and can reach the vicinity of the opening end of the through hole in which the shank base end is disposed. A medical drill unit according to any one of claims 1 to 6. A drill used in the medical drill unit according to any one of claims 1 to 7 ,
A drill body having a shank and a blade portion in which a cutting edge is continuously formed; and
A through-hole provided along the axis of the drill body, having an opening at the shank proximal end and the blade tip,
A drill comprising: a second optical transmission unit disposed in the through hole. A translucent member is disposed on the blade tip end side of the through hole, and an end portion of the second light transmission unit on the blade tip end side reaches the translucent member. The drill according to claim 8 , wherein the drill is disposed. The blade portion of the drill body is a twist type blade portion formed by forming a cutting blade in a spiral shape, and the through hole is a through hole having an opening on the tip side of the blade portion at a chisel edge. The drill according to claim 8 or 9 . The drill according to any one of claims 8 to 10 , further comprising third condensing means that is continuous with a distal end side end portion of the blade portion of the second light transmission portion. A medical processing apparatus comprising the medical drill unit according to any one of claims 1 to 7 ,
A light source for sending light to the medical drill unit;
A light detection means for detecting the return light of the light delivered from the medical drill unit and irradiated toward the workpiece;
A processing device for processing the optical information of the specific element derived from the light state detected by the light detection means,
The medical processing apparatus, wherein the processing apparatus is a processing apparatus that detects a different phase portion inside a workpiece based on the optical information. The processing device calculates a thickness of a part to be processed of the workpiece from the detected position information of the different phase part;
The medical processing apparatus according to claim 12 , further comprising notification means for notifying the calculation result.

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