JP2017176229A - Dental handpiece device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dental handpiece device capable of suppressing a state in which a cut surface cannot be observed because it is a dead zone.SOLUTION: A dental handpiece device includes a dental handpiece body, and a dental handpiece imaging device provided to the dental handpiece body. The dental handpiece imaging device includes a plurality of camera modules for taking an image and converting the image to an electric signal, and processing means for receiving the electric signal from the plurality of camera modules, and performing calculation for creating an image based on the electric signal, and switching of the display of the image by the plurality of camera modules.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dental handpiece device that images and displays an affected area during dental treatment.

  In dental treatment, a tool is mounted on a dental handpiece body, and teeth are cut with the tool. At this time, the practitioner preferably proceeds with cutting while observing the cutting state. In particular, it is known that a dental prosthesis to be attached to a tooth has an important shape matching with a cut tooth, and has a great influence on the life of the dental prosthesis. Therefore, it is very important to perform the treatment accurately while observing the cutting state in a clearer state.

  On the other hand, a dental handpiece having a camera module built in or detachably mounted at one or a plurality of locations around the tool mounting portion of the head portion of the dental handpiece has been proposed (Patent Documents 1 to 3). Patent Document 4). The video signal from the camera module is transmitted to a video camera control unit outside the dental handpiece and displayed as a video on a monitor connected thereto. Using the dental handpiece equipped with this camera module, the status of the affected area during the operation can be observed on the monitor screen, and the operation accuracy and workability of the operation are improved.

JP 2015-112377 A JP 2014-046016 A JP 2013-169256 A JP 09-056730 A

  However, in a dental handpiece on which a conventional camera module is mounted, there is a problem in that the camera module cannot catch the cutting surface due to a blind spot due to the positional relationship between the cutting tool, the light incident surface of the camera module, and the teeth.

  Then, this invention makes it a subject to provide the dental handpiece apparatus which can suppress that a cutting surface becomes a blind spot and cannot be observed in view of the said problem.

  One aspect of the present invention includes a dental handpiece body and a dental handpiece imaging device provided in the dental handpiece body. The dental handpiece imaging device captures an image by imaging. A plurality of camera modules for converting into electrical signals; processing means for receiving electrical signals from the plurality of camera modules and generating video based on the electrical signals; and switching between video display by the plurality of camera modules; A dental handpiece device.

In the processing means, it is possible to perform an operation for determining whether or not a cutting portion by a tool attached to the dental handpiece main body is visible.
At that time, whether or not the cutting portion can be visually confirmed may be determined by determining whether or not the tip of the tool is visible.

The above processing means makes a determination from a camera module having a high priority set in advance for a plurality of camera modules, and when it is determined that the cutting portion cannot be visually recognized in the determination, the camera module having the next highest priority is determined. Judgment can be made by switching.
In this case, the processing means may be provided with a predetermined grace period before switching from the camera module with the higher priority to the camera module with the next priority.

  As another aspect of the present invention, a switch may be further provided, and calculation may be performed by the processing means so that the video is switched by a signal from the switch.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to suppress the scene where a cutting surface becomes a blind spot and cannot be seen at the time of cutting of a tooth.

It is the figure explaining one form and is a figure showing typically the composition of dental handpiece device 100. It is the figure which planarly viewed the periphery of a head. FIG. 3A and FIG. 3B are diagrams for explaining the structure of the light entrance / exit means 13. 1 is a block diagram schematically showing the configuration of a dental handpiece imaging device 10. FIG. 6 is a flowchart illustrating an example of a calculation performed by a processing unit 21. FIG.

  Hereinafter, the present invention will be described based on embodiments shown in the drawings. However, the present invention is not limited to these forms.

  FIG. 1 is a diagram for explaining one embodiment, and is a diagram schematically showing a configuration of a dental handpiece device 100. As can be seen from FIG. 1, the dental handpiece device 100 includes a dental handpiece body 1 and a dental handpiece imaging device 10. FIG. 2 is an enlarged view of the periphery of the head 2 of the dental handpiece body 1 and is a plan view from the side on which the tool 3 is mounted.

In this embodiment, a known dental handpiece body 1 can be used. That is, the head 2 is provided, and a tool mounting portion 2a is provided on one surface side of the head 2, and a tool 3 such as a dental drill is mounted thereon. A rotational force is applied to the tool 3 by flowing air through a flow path provided in the dental handpiece body 1.
In this embodiment, as shown in FIG. 2, four cooling water injection ports 2b are provided on the surface of the head 2 on which the tool mounting portion 2a is formed. The cooling water injection port 2b communicates with a flow path provided in the dental handpiece body 1, and cooling water is injected from the cooling water injection port 2b by flowing water through the flow path.
Here, although the form of the dental handpiece body 1 is shown as an example, as described above, a known dental handpiece body can be applied without being limited thereto.

  The dental handpiece imaging apparatus 10 includes a video acquisition device 11, a processing unit 21, and a display unit 31.

  The video acquisition device 11 is a device that acquires a video of a tooth cutting scene, converts it into an electrical signal, and transmits the signal to the processing means 21. As can be seen from FIG. 2, in the present invention, a plurality of video acquisition devices 11 are provided. Here, two video acquisition devices 11 are illustrated, but the video acquisition devices 11 may be further provided at different positions. FIG. 3 shows a diagram for explaining the distal end portion of one video acquisition device 11. In FIG. 3, members included in the inside are indicated by dotted lines. 3A is a diagram viewed from the same viewpoint as FIG. 2, and FIG. 3B is a diagram viewed from the same viewpoint as FIG.

The video acquisition device 11 includes a conductive unit 12, an input / output unit 13, and a holding member 16.
The conductive means 12 is a tubular member configured to have a conducting wire for electrically connecting an input / output light means 13 and a processing means 21 to be described later. The conducting means 12 includes a so-called conducting wire inside its tubular shape, and at least two conducting wires are arranged. One of them is a conducting wire 12 a that connects the camera module 15 and the processing means 21, and the other is a conducting wire 12 b that connects the light source 14 and the processing means 21.

  As shown in FIGS. 1 to 3, the light entering / exiting means 13 is a tubular member disposed at one end of the conductive means 12. The light entrance / exit means 13 has a light source 14 including a light source light output portion and a camera module 15 including a light input portion having an intake port for allowing light from the oral cavity to enter inside the tubular shape. doing.

The light source 14 is a unit that receives power supplied from the processing unit 21 via the conductive wire 12b and emits illumination light. This illuminates the oral cavity. Therefore, white light is preferable. Although the specific form of the light source 14 is not specifically limited, LED can be mentioned from a viewpoint of power consumption or lifetime.
The camera module 15 is means for appropriately entering light from the oral cavity, which is an image to be photographed, and converting the light into an electrical signal. Then, the converted signal is transmitted to the processing means 21 by the conducting wire 12a. Although the specific form of the camera module 15 is not specifically limited, The apparatus containing a lens and photoelectric conversion sensors, such as CCD and CMOS, can be mentioned.

As can be seen from FIG. 1, the holding member 16 is a member provided so as to protrude from the conductive means 12, and enables the conductive means 12 and the input / output light means 13 to be attached to the dental handpiece body 1 and held. Means. The holding member 16 is not particularly limited as long as the holding member 16 can hold such a member, and the holding member 16 is configured to sandwich the dental handpiece main body 1 or adsorbs to the dental handpiece main body 1. The thing of a structure etc. can be mentioned.
Here, the holding member only needs to be able to hold the input / output light means on the dental handpiece, and therefore the holding means may be provided on the input / output light means.

  Such an image acquisition device 11 is attached and held to the dental handpiece body 1 as follows to form a dental handpiece. That is, as can be seen from FIGS. 1 and 2, the holding member 16 is attached to the dental handpiece body 1. At this time, the camera modules 15 of the plurality of video acquisition devices 11 are arranged so as to be focused on the tip of the tool 3 from different directions.

Returning to FIG. 1, another configuration of the dental handpiece imaging apparatus 10 will be described.
The processing means 21 has a power source 22 for the light source 14 of the video acquisition device 11 and processes video signals acquired from the plurality of camera modules 15 of the video acquisition device 11 to control display. The processing unit 21 includes a power source 22, a receiving unit 24, a central operator 25, a storage unit 26, a RAM 27, and a transmitting unit 28. FIG. 4 also shows a block diagram for explaining the relationship among the processing means 21, the light source 14, and the camera module 15.

  The power source 22 is a power source for the light source 14. Accordingly, as can be seen from FIGS. 1 and 4, the power source 22 is connected to the light source 14 by the conducting wire 12 b of the conductive means 12.

  The receiving unit 24 is a member having a function of taking in an electrical signal based on light from the oral cavity from the camera module 15, and is connected to the plurality of camera modules 15. This includes so-called input ports, input connectors, and the like. The connection mode may be wired or wireless.

The central operator 25 is a so-called CPU, and functions as an image processing means and other various calculation means. That is, the central operator 25 executes various programs stored in the storage unit 26 that functions as a storage medium, calculates and outputs a predetermined result, and controls the dental handpiece imaging apparatus 10.
When the central operator 25 functions as an image processing means, it takes in an electrical signal from the receiving means 24, performs an operation based on a program, and generates a resultant video signal. As one of the calculations, as will be described later, a calculation that determines an appropriate video from the plurality of camera modules 15 and switches the video as necessary is included. This prevents the cutting portion by the tool 3 from becoming invisible due to the blind spot. Specific embodiments will be described later.
In addition, as the generated video signal, the received signal is displayed as video as it is, video from a plurality of camera modules 15 is displayed simultaneously on the screen, a part of the video is enlarged, or part of the video signal is displayed. It is also possible to add visual effects such as prominently displaying or measuring on the screen. This improves convenience for the practitioner. A known program can be applied to such an image processing program.
The central operator 25 is connected to other members provided in the processing means 21 such as the receiving means 24, the storage means 26, the RAM 27, and the transmitting means 28, and is configured so that these can be controlled based on a program. Yes.

  The storage means 26 is a member that functions as a storage medium in which various programs and data that are the basis for the calculation performed by the central operator 25 are stored. Further, the storage unit 26 may function as a storage unit that stores videos to be stored, patient data, and the like.

  The RAM 27 is a member that functions as a work area for calculation by the central operator 25 and a temporary data storage unit. The RAM 27 can be composed of SRAM, DRAM, flash memory, or the like, and is similar to a known RAM.

  The transmission unit 28 is a member having a function of transmitting a signal to be transmitted to the display unit 31 among the obtained results. This includes so-called output ports, output connectors, and the like. The transmission mode may be wired or wireless.

  The display unit 31 is connected to the transmission unit 28 of the processing unit 21 and is a unit that displays an image based on information acquired from the transmission unit 28. Various monitors and the like are used.

  The dental handpiece imaging device 10 and the dental handpiece device 100 having the above-described configuration operate as follows.

  As for the dental handpiece main body 1, the tool 3 mounted by rotating air rotates, and cooling water flows in and the cooling water is emitted from the cooling water injection port 2b. Thereby, it is possible to normally cut teeth and the like while cooling.

  In this embodiment, electricity is further supplied from the power source 22 of the processing means 21 to turn on the light source 14. Thereby, light is emitted from the light source 14 and the oral cavity is illuminated. By illuminating the oral cavity in this way, an intraoral image can be acquired. That is, the reflected light from the illuminated oral cavity is captured by the camera module 15, and an image is generated by the processing unit 21 and displayed on the display unit 31.

  Here, based on the program stored in the storage means 26, the processing means 21 performs, for example, the following calculation by a central operator functioning as an image processing means so that the cutting state of the tip of the tool 3 can be visually confirmed. maintain. One example of the calculation for switching the video as necessary is shown in the flowchart of FIG. This flow includes steps S11 to S17.

First, as shown in step S11, an image is acquired from the camera module 15 with the highest priority among the plurality of camera modules 15, and a color image is generated by the processing means 21 as in step S12. As can be seen from the above, priorities are determined in advance for the plurality of camera modules 15.
Thereafter, as shown in step S13, it is determined whether or not the tip of the tool can be recognized by the camera module 15. If the tip of the tool can be recognized in this process, it means that the state of tooth cutting can be visually recognized by this camera module. Therefore, Yes is selected, and the process proceeds to step S14 to display an image. And it returns to process S12 and the said process is performed repeatedly.
On the other hand, when the camera module 15 cannot recognize the tip of the tool, No is selected in step S13, and the process proceeds to step S15 to start the counter. In this process, there is a grace period for a predetermined time. It is considered that during cutting of the teeth, the tip of the cutting tool is temporarily difficult to see due to water droplets or the like adhering to the cutting powder or cooling water. Therefore, the camera module is not switched as soon as the cutting tool can no longer be recognized, but only when the duration of the hidden state exceeds the set time with a time limit provided by the counter. Like that.

After a predetermined time has passed in step 15, the process proceeds to step S16, and it is determined again whether or not the tip of the tool can be recognized by the camera module 15. If the tip of the tool can be recognized in this process, it means that the state of tooth cutting can be visually recognized with this camera module. Therefore, Yes is selected, and the process proceeds to step S14 to display an image. And it returns to process S12 and the said process is performed repeatedly.
On the other hand, if the tip of the tool cannot be recognized in this process, it can be determined that the camera module 15 cannot visually recognize the cutting state in this posture. Then, it progresses to process S17 and the image | video from the camera module 15 of the next priority is acquired. Then, it returns to process S12 and repeats the said process.

  As described above, according to the dental handpiece device 100 including the dental handpiece imaging device 10, it is possible to perform the treatment while more surely viewing the state of cutting of the tooth or the like by the tool 3 with the display means 31. In particular, during cutting, it becomes possible to prevent the cut portion from being hidden by a tooth or the like and becoming invisible, and the convenience of the practitioner is enhanced.

The above is an example of the control of the dental handpiece device 10 by the processing means 21, and changes can be made as necessary. For example, although the video from one camera module is displayed in the above example, the video from a plurality of camera modules may be displayed simultaneously on a plurality of screens. Thereby, a cutting part can be visually recognized from several viewpoints, and it becomes the further convenience improvement.
In addition to the configuration in which the camera module is automatically switched as described above, the practitioner may be configured to manually switch the camera module. According to this, there exists the convenience which can select an image | video according to a practitioner's liking. In that case, for example, a switch can be provided in any of the dental handpiece devices 100, and the processing means 21 can be configured to switch and display a plurality of camera modules according to an operation signal of the switch. For example, the convenience of the practitioner can be improved by switching the displayed camera module each time the practitioner presses the switch.

  Moreover, in the said form, although the handpiece main body 1 and the video acquisition apparatus 11 were comprised so that attachment or detachment was possible separately, it is not restricted to this, The handpiece main body 1 and the video acquisition apparatus 11 are comprised integrally. May be.

DESCRIPTION OF SYMBOLS 1 Dental handpiece main body 2 Head 2a Tool mounting part 2b Cooling water injection port 3 Tool 10 Dental handpiece imaging device 11 Image acquisition device 12 Conductive means 13 Incoming / outgoing light means 14 Light source 15 Camera module 21 Processing means 22 Power supply 24 Receiving means 25 Central operator 26 Storage means 27 RAM
28 Transmitting means 31 Display means 100 Dental handpiece device

Claims (6)

A dental handpiece body, and a dental handpiece imaging device provided in the dental handpiece body,
The dental handpiece imaging device is:
A plurality of camera modules for imaging and converting video to electrical signals;
A dental hand comprising: an arithmetic unit that receives the electrical signals from the plurality of camera modules and generates an image based on the electrical signals; and a processing unit that switches display of the images by the plurality of camera modules. Piece device.   The dental handpiece device according to claim 1, wherein the processing means performs a calculation for determining whether or not a cutting portion by a tool attached to the dental handpiece body is visible.   The dental handpiece device according to claim 2, wherein the processing means determines whether or not the cutting portion can be visually recognized by determining whether or not the tip of the tool can be visually recognized.   The processing means performs the determination from the camera modules having a high priority set in advance for the plurality of camera modules, and determines that the cutting portion is not visually recognized in the determination, the next highest priority. The dental handpiece device according to claim 2 or 3, wherein the determination is performed by switching to a camera module.   The dentist according to claim 4, wherein the processing means is provided with a predetermined grace period before performing the switching from the camera module having the higher priority to the camera module having the next priority. Handpiece device.   The dental handpiece device according to claim 1, further comprising a switch, wherein the video is switched by a signal from the switch.

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