KR101425955B1 - Dental scanner for anti-fogging - Google Patents

Abstract

A mouth scanner capable of preventing fogging is disclosed, wherein the anti-fogging oral scanner comprises: a main body; An optical output member provided inside the main body; An insertion body connected to one side of the body so as to communicate with the body; An optical system unit slidably installed on one side of the insert; And a drive motor provided in the main body for slidingly driving the optical system unit, wherein the insert includes a transmission window for transmitting light reflected by the optical system unit, and a heating member coupled to the transmission window along a side edge of the transmission window, .

Description

[0001] DENTAL SCANNER FOR ANTI-FOGGING [0002]

The present invention relates to a mouth scanner capable of preventing fogging.

Generally, in dental hospitals and so on, impression taking is performed to produce a gypsum model for the patient's teeth, and treatment and medical care of the affected part are performed. However, in the impression making process of producing such a gypsum model, problems such as consumption of materials and cross-contamination, possibility of destruction of the manufactured model, and storage problems are occurring.

In order to grasp the state of the oral cavity in the past, a sheet-like film is inserted into the oral cavity, and the film is fixed near the lesion using the patient's hand or tongue. Then, radiation such as x- And a method of using the film based thereon has been proposed.

However, this method can be applied to a problem in which an error may occur in the process of two-dimensional plane measurement of a three-dimensional structure, by two-dimensionally manual measurement using a radiograph or by relying on a CT (computer tomography) . In addition, patients are exposed to a large amount of radiation, which can cause many clinical problems due to the economic burden of the patient and complexity in the execution stage.

Accordingly, there is a need for a three-dimensional oral scanner capable of precisely and more effectively three-dimensionally modeling the teeth while reducing the possibility of causing problems in the patient's health.

SUMMARY OF THE INVENTION An aspect of the present invention is to solve the above-mentioned problems of the prior art, and to provide an anti-fogging oral-use scanner that generates a three-dimensional scanning model of teeth using scanning data of teeth.

According to a first aspect of the present invention, there is provided an oral scanner comprising: a main body; An optical output member provided inside the main body; An insertion body connected to one side of the body so as to communicate with the body; An optical system unit slidably installed on one side of the insert; And a drive motor provided in the main body for slidingly driving the optical system unit, wherein the insert includes a transmission window for transmitting light reflected by the optical system unit, and a heating member coupled to the transmission window along a side edge of the transmission window, . ≪ / RTI >

According to one embodiment of the present invention, by attaching the heating member to the transmission window, it is possible to prevent the moisture from being transmitted to the transmission window, thereby obtaining more accurate scanning information.

1 is a perspective view of a fog-proof mouth scanner according to an embodiment of the present invention.
Fig. 2 is a simplified exploded perspective view of the anti-fogging oral scanner according to Fig. 1;
3 is a side view of a fog-proof mouth scanner according to an embodiment of the present invention.
4 and 5 are perspective views of a fog-proof mouth scanner insert according to the present invention.
6 to 10 are perspective views of a transmission window according to the present invention.
FIG. 11 is a view for explaining an apparatus for preventing moisture or frost from occurring in a transmission window according to an embodiment of the present invention. Referring to FIG.
12 is a view for explaining generation of three-dimensional data according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, the same reference numbers are used throughout the specification to refer to the same or like parts.

Throughout this specification, when a part is referred to as being "connected" to another part, it is not limited to a case where it is "directly connected" but also includes the case where it is "electrically connected" do.

Throughout this specification, when a member is " on " another member, it includes not only when the member is in contact with the other member, but also when there is another member between the two members.

Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. The terms "about "," substantially ", etc. used to the extent that they are used throughout the specification are intended to be taken to mean the approximation of the manufacturing and material tolerances inherent in the stated sense, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure. The word " step (or step) "or" step "used to the extent that it is used throughout the specification does not mean" step for.

1 to 5, a fog-proof mouth scanner according to the present invention includes a main body 100, an insert 200 connected to the main body 100 to communicate with the main body 100, A transmission window 260 capable of transmitting light reflected by the optical system unit 300 and an optical system unit 300 which is provided inside the main body 100, And a light output member 500 positioned on a virtual line.

The main body 100 includes a first driving motor 101 for driving the optical system unit 300, a second driving motor 102 for reciprocating the optical output member 500 on an imaginary axis intersecting the optical system unit 300, An optical sensor 600 facing the optical output member 500 and spaced apart from each other, and a control unit 400 for processing data of the scanned teeth.

However, the arrangement structure of the first drive motor 101, the second drive motor 102, and the optical output member 500 can be changed according to the user's selection. Further, the configuration in the main body can be sufficiently changed according to the user's selection, and some components may be omitted as well as the arrangement structure.

The main body 100 further includes a plurality of side surfaces 130 connected to the first plane 110 and the first plane 110 so as to intersect with the first plane 110 and a plurality of side surfaces 130 parallel to the first plane 110, And a second plane 150.

The first plane 110 and the second plane 150 are formed in the shape of a square or a rectangle and four sides 131, 132, and 133 connected to the first plane 110 and the second plane 150, . Accordingly, the main body 100 is formed in a rectangular parallelepiped shape by the first plane 110, the plurality of side surfaces 130, and the second plane 150 by this structure.

On the other hand, at least one side surface of the plurality of side surfaces 130 is formed with a communication hole 130 'through which the insertion body 200 communicating with the main body 100 can be connected. That is, the communication hole 130 'is formed on one side of the four side surfaces 131, 132, and 133.

The insert 200 connected to the main body 100 is formed in the shape of an insertion tube protruding from the main body 100 so as to be inserted into the mouth of the user.

The insert 200 includes an upper side 210 and an upper side 210 parallel to the first plane 110 and the second plane 150 of the body 100 and a plurality of side surfaces 230 crossing the upper side 210, And a lower side 250 that intersects the side surfaces 230 and is inclined.

The upper side 210 is formed in a rectangular shape having a long length in a direction in which the insert 200 is coupled with the main body 100 and three sides 231, 233 and 235 are connected to the upper side 210 . The lower side 250 connected to the ends of the three sides 231, 233 and 235 is formed to be inclined upward from one side connected to the main body 100 toward the other side. At this time, the side surface 231 coupled to the upper surface 210 may be partially bent.

The cross section of the insert 200 in the longitudinal direction gradually increases the area of the end faces 233 and 235 from the end of the insert 200 toward the side where the insert 200 is connected to the main body 100.

This means that a light source (that is, output light) output to the optical system 330 through the inside of the insert 200 and a path of a light source (that is, reflected light) reflected from the tooth and incident on the optical sensor 600 So as to protect the light source.

However, the shape can be variously changed.

The transmissive window 260 is provided on the lower side 250 of the insert 200 to transmit light reflected by the optical system unit 300 and the transmissive window 260 is coupled to the lower side 250 A transmission window hole 251 is formed.

When the insert 200 is inserted into the oral cavity to perform the scanning operation, the permeation window 260 may be wet or frost due to the difference between the temperature in the oral cavity and the external temperature. In order to prevent this, a heating member 261 for generating heat is attached to one surface of the transmission window 260. When the heating member 261 is connected to the conductive line 262 at both ends of the heating window 261, Prevents cold or frost.

Referring to FIGS. 6 to 10, the heating member 261 is attached to one side of the transmission window 260 so as to surround the transmission window 260 along the edge of the transmission window 260. At this time, the transmissive window 260 may be attached in such a manner that it does not surround the entire edge of the transmissive window 260 but surrounds only a portion except for a part. Exemplarily, the heating member 261 is attached along the left corner, the right corner, and the lower corner of the transmission window 260, and is not attached to the upper edge. Further, the heat generating member 260 may illustratively use a resistive material which generates heat when a heat ray or an electric current flows. In addition, the heat generating member 260 may use a transparent material so as not to interfere with light transmission through the transmission window 260.

With such a configuration, it is possible to prevent the phenomenon of moisture getting cold and freezing while securing the path of the light.

The lead wire 262 may be used in connection with the main body 100 or the current supply unit 700 inside the insert 200, for example.

6 through 10, a transmissive window sensor 263 may be added to an upper corner portion of the transmissive window 260. FIG. Illustratively, the transmissive window sensor 263 is activated simultaneously with the supply of power to the oral scanner. When the transmission window sensor 263 is operated, a phenomenon in which the transmission window 260 is frozen or damped while the mouth scanner scans the tooth is detected through a change in humidity or temperature. At this time, an electric current is supplied to the heating member 261 attached to the transmission window 260 through the conductive line 262, thereby preventing a phenomenon of moisture getting cold or freezing.

The transmission window sensor 263 can be used by being connected to the main body 100 or the current supply unit 700 inside the insert 200, for example.

Hereinafter, an embodiment of a transmissive window 260 capable of preventing fogging will be described with reference to FIGS. 6 to 10. FIG.

Referring to FIGS. 6 and 7, a heating member 261 may be coupled to one side of the transmission window 260 so as to exclude an upper corner portion of the transmission window 260. One side of the transmissive window 260 may be illustratively a side facing the interior of the insert 200.

Referring to FIG. 8, the heating member 261 and the conductive wire 262 may be coupled to the side surface of the transmission window 260, which is a surface to which the transmission window 260 and the transmission window hole 251 are coupled, . When the heating member 261 and the conductive wire 262 are coupled to the side surface of the transmission window 260, the light reflected by the optical system unit 300 can be more easily transmitted.

Referring to FIG. 9, the heating member 261 may be coupled to one side of the transmission window 260 facing the inside of the insert and the side edge of the transmission window 260 to exclude the upper corner. When the heat generating member 261 is coupled to both the one side and the side surface of the transmission window 260, an area for generating heat is widened to prevent the phenomenon that the moisture becomes cold or the product is frosted more efficiently.

Referring to FIG. 10, the heating member 261 may be coupled to one side of the transmission window 260 facing the inside of the insert, except for the upper and lower corner portions. This can facilitate the transmission of light reflected by the optical system unit 300 while preventing moisture or frost from occurring in the transmission window 260.

FIG. 11 is a view for explaining an apparatus for preventing moisture or frost from occurring in a transmission window according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 11, a device for preventing moisture or frost from occurring in the transmission window described above will be described in detail.

First, the state of the transmission window 260 is sensed through the transmission window sensor 263. The transmission window sensor 263 is connected to the current supply unit 700, which may be included in the main body 100 or the insert 200, and receives a current necessary for the operation. The transmission window sensor 263 senses the phenomenon of frost or steaming of the transmission window 260. By way of example, moisture can be sensed to detect the phenomenon of frost or frost.

Based on the humidity sensed by the transmission window sensor 263, whether or not the current supply unit 700 is supplied with current.

The current supplying unit 700 supplies a current to the heating member 261 through the conductive line 262 and the heating member 261 generates heat through the supplied current to control the phenomenon of moisture becoming hot or freezing have.

The current supply unit 700 may be disposed inside the main body 100 or the insert 200 according to the user's selection.

The optical system unit 300 provided inside the insert 200 is more accurately provided inside the upper side 210 of the insert 200.

The optical system unit 300 includes a guide 310 coupled to the inside of the upper side 210 of the insert 200, an optical system slider 320 slidably coupled to the guide 310, An optical system 330 rotatably coupled to one side of the optical system slider 320 while facing the optical system slider 320 while facing the side where the insert 200 and the main body 100 are connected, And stopping the movement of the optical system stopper 340.

An optical output member 500 for outputting light to the optical system 300 and an optical sensor 600 for receiving the reflected light from the optical system 300 and a control unit 400 for controlling them are provided in the main body 100 .

3, the optical system slider 320 moves the optical system 330 to the set reflection position under the control of the control unit 400, and adjusts the angle of the optical system 330 To the set reflection angle. Here, the reflection position and the reflection angle of the optical system 330 are set such that the light incident on the optical system 330 is reflected at a set emission angle.

Specifically, the optical system slider 320 moves the optical system 330 horizontally back and forth in accordance with the moving direction and the moving distance set from the control unit 400, and drives the optical system 330 to be positioned at the reflection position corresponding to one position of the to-be-scanned tooth. The optical system slider 320 adjusts the angle by rotating the optical system 330 in accordance with the reflection angle set so that the optical system 330 can reflect the light toward the teeth at a predetermined emission angle.

At this time, on the basis of the reflection position information and the reflection angle information of the optical system 330 driven by the optical system slider 320, the value of the coordinates (hereinafter referred to as the first coordinate) with respect to the position where the light is projected onto the to- Can be calculated. The first coordinate indicates the coordinates of one axis (e.g., the B axis) of the teeth to be scanned.

The control unit 400 sets a reflection position and a reflection angle at which the optical system 330 can reflect the incident light toward the teeth at a predetermined emission angle and controls the operation of the optical system slider 320 . Here, it is possible to calculate the B-axis coordinate value of the three-dimensional scanning model for the object teeth to be scanned based on the reflection position or the reflection angle value.

In addition, the control unit 400 can control the optical system slider 320 so that at least two scans are performed on the teeth to be scanned. Specifically, the control unit 400 sets the reflection angle of the optical system 330 at two or more different angles from each other for the positions of the teeth to be scanned. Then, the control unit 400 controls the optical system slider 320 such that the optical system 330 is adjusted at two or more different angles from each other at the same reflection position.

For example, the control unit 400 may cause the reflection position to be moved in the first movement direction while maintaining the reflection angle of the optical system 330 at the first reflection angle, and to change the reflection angle to the second The optical system slider 320 can be controlled to move the reflecting position in the second moving direction opposite to the first moving direction while maintaining the reflecting angle.

The control unit 400 moves the reflection position of the optical system 330 in one direction and adjusts the reflection angle of the optical system 330 to the first reflection angle at the same reflection position, The slider 320 may be controlled.

Thus, by changing the reflection angle of the optical system 330 to two or more different angles with respect to the same reflection position, the incident light having the same position and angle is reflected at the different exit angle through the optical system 330. [ Accordingly, the optical system 330 can reflect light at least at two or more outgoing angles so that outgoing light of different angles can be projected for each positional coordinate of the teeth to be scanned.

The optical output member 500 outputs light (in the embodiment of the present invention, a "laser light source" as an example) to the optical system 330 in accordance with the output position and the output angle set under the control of the control unit 400 do.

The control unit 400 sets the output position and output angle of light (hereinafter, referred to as output light) to correspond to the set output angle. Here, the control unit 400 may calculate the A-axis coordinate value of the three-dimensional scanning model for the object tooth to be scanned based on the value of the output angle or the output position.

Further, the control unit 400 controls the optical output member 500 to output the output light of the same output angle and output position twice or more at the same position, so that at least twice scanning is performed for the same position of the teeth to be scanned Can be controlled.

Further, on the basis of the output position information and the output angle information for the output light of the optical output member 500 under the control of the control unit 400, the coordinates of the position where the light is projected on the to-be-scanned tooth (hereinafter referred to as the second coordinate ) Can be calculated. That is, the first coordinate and the second coordinate that match each other indicate the coordinates (i.e., the position coordinates) of one position of the teeth to be scanned.

On the other hand, the output light output from the optical output member 500 is reflected at the set exit angle through the optical system 330, and the outgoing light reflected through the optical system 330 is reflected to the to-be-scanned teeth. At this time, the reflected light reflected from the teeth to be scanned is incident on the optical system 330, reflected again, and incident on the optical sensor 600.

2 and 3, an optical output member 500 for outputting a light source by an optical system 330 and a light source (that is, output light) reflected from the optical system 330 are disposed inside the main body 100, An optical sensor 600 for receiving the reflected light reflected by the optical sensor 600, and a control unit 400 for operating the driving motor or processing the data of the scanned tooth as described above.

The optical output member 500 can reciprocate on a virtual axis intersecting the optical system unit 300 by the second drive motor 103 as described above to change the output position of output light.

The optical output member 500 may change the output angle of the output light based on the second reference axis or the third reference axis. Further, the optical output member 500 may be moved in a sliding manner to the left and right sides to change the output position of the output light, which is performed by the second drive motor 102 as described above.

For reference, the first reference axis, the second reference axis, and the third reference axis are perpendicular to each other. Here, the B coordinate value may be calculated according to the reflection angle of the optical system 330, and the C coordinate value may be calculated according to the position of the light incident on the optical sensor 600.

In this embodiment, the light output member 500 is a laser diode, and the light output member 500 may be as small as possible in order to limit its size.

In addition, the optical sensor 600 may be a light-receiving element such as a charge coupled device (CCD) or a position sensitive device (PSD). In this embodiment, the optical sensor 600 is a PSD element.

When scanning the tooth using the oral scanner according to the present embodiment, the output light output from the optical output member 500 is reflected (reflected) to the same position among the surfaces of the tooth according to the emission angle reflected through the optical system 330 The intensity of the reflected light becomes different.

12 is a view for explaining generation of three-dimensional data according to an embodiment of the present invention.

The generation of three-dimensional data through the configuration of the control unit 400 described above with reference to FIG. 12 will be described in detail.

The control unit 400 includes a data processing unit 410 and the data processing unit 410 includes an optical sensing unit 411, a three-dimensional data generating unit 412, and a data managing unit 413. [

The optical sensing unit 411 generates positional information corresponding to the electrical signal output from the optical sensor 600 (i.e., height value of each part of the teeth to be scanned) and transmits the positional information to the three-dimensional data generating unit 412. At this time, the coordinate value of the height axis with respect to the to-be-scanned tooth can be calculated based on the height value (that is, the position information according to the electric signal) generated by the optical sensing unit 411.

At this time, the optical sensing unit 411 can calculate the coordinate value of the C axis according to the displacement measurement method using the optical triangulation method. Such a photon trigonometric method is a displacement measurement method using a two-dimensional trigonometric method based on geometric optics. In the optical trigonometry, the optical system exists in one plane and is composed of two optical axes which intersect at an angle of θ with respect to each other.

의 각도를 갖는다.At this time, one of the two optical axes is a condensed optical axis that forms a spot on the surface of the object to be measured, and the other is an image optical axis that projects an image of a light spot onto the light receiving element. Here, the light spot formed on the surface of the measurement object moves linearly on the condensed optical axis as the relative position of the measurement object changes, and the movement range at this time is referred to as an object trajectory (object trajectory). In addition, as the light spot moves, the image point on the light receiving element moves, and the range of movement of the image point at this time is called an image trajectory. The image trajectory is the vertical direction of the image optical axis

.

At this time, the moving distance p of the light spot on the object trajectory and the moving distance q of the corresponding image point can be obtained by the following equation (1).

For reference, f is the focal length of the image lens for projecting the image along the light spot on the light receiving element, and s is the distance between the image lens and the actual measurement object.

는 하기 수학식 2 를 통해 구할 수 있다.Also,

Can be obtained by the following equation (2).

When such a phototriangular method is applied to the embodiment of the present invention, the output light forms a light spot on the surface of the target tooth, and the light (that is, incident light) reflected on the target tooth is imaged on the PSD sensor again. Then, the PSD sensor outputs an electrical signal corresponding to the imaging position of the incident light. At this time, the position of the image formed on the PSD sensor changes according to the height change of the teeth, so that the height value of the target tooth can be measured.

The three-dimensional data generation unit 412 generates three-dimensional data by matching the C-axis coordinate value and the B-axis coordinate value for each A-axis coordinate received from the optical sensing unit 411.

At this time, the three-dimensional data generation unit 412 can output the generated three-dimensional data to an external device (for example, a three-dimensional modeling device) through the data management unit 413, Dimensional model and stores it through the data management unit 413.

Specifically, the three-dimensional data generation unit 412 integrates the A, B, and C axis coordinate values matched to each other among the generated three-dimensional data to generate a three-dimensional scanning model of the subject tooth.

For reference, all or a part of the configuration of the data processing unit 410 may be included in the oral scanner 100, or may be connected to the oral scanner 100 by a cable or the like as a separate device.

The data management unit 413 stores three-dimensional data (or a three-dimensional model) of the scanning target teeth received from the three-dimensional data generation unit 412. [

For reference, the data management unit 413 can transmit three-dimensional data to an external apparatus.

The data management unit 413 may output the data through an output system (not shown) provided with a three-dimensional scanning model of the stored patient teeth, an output system (not shown) connected to a data cable or a network .

Thus, by storing and outputting the three-dimensional scanning model of the target tooth, the three-dimensional scanning model can be more accurately corrected and confirmed without directly confirming the affected part of the patient. In addition, the user may perform the tooth scanning operation while checking the photographed data in real time.

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: main body 130 ': communication hole
200: insert body 250: lower side
251: Transmission window hole 260: Transmission window
261: heating member 262: conductor
263: Transmission window sensor 300: Optical system unit
310: guide 320: optical system slider
330: Optical system 340: Optical system stopper
400: control unit 410: data processing unit
411: optical sensing unit 412: three-dimensional data generating unit
413: Data management unit 500: Optical output member
600: optical sensor 700: current supply unit

Claims (11)

In a mouth scanner capable of preventing fogging,
main body;
An optical output member provided in the main body and outputting laser light;
An insertion body connected to one side of the body so as to communicate with the body;
An optical system unit that reflects the laser beam to a target tooth to be scanned and is slidable on one side of the insert; And
And a driving motor provided inside the main body for slidingly driving the optical system unit,
Wherein the insert includes a transmission window for transmitting the laser light reflected by the optical system unit and the laser light reflected from the to-be-scanned tooth, and a heating member coupled along the side edge of the transmission window,
Wherein the heat generating member is coupled to one side of the transmission window, the side of the transmission window, or one side and the side of the transmission window.
The method according to claim 1,
Wherein the insert has a top surface, a plurality of side surfaces crossing the top surface, and a bottom surface that is connected to the plurality of side surfaces so as to intersect with the plurality of side surfaces, wherein the bottom surface is inclined, and the transmission window is coupled to the bottom surface. Possible Oral Scanner.
3. The method of claim 2,
Wherein the lower side surface is inclined upwards from an end portion connected to the main body to an end portion of the insertion body.
The method according to claim 1,
Wherein the insertion body further comprises a current supplying unit connected to the heat generating member and supplying a current to the heat generating member.
5. The method of claim 4,
The inserter further includes a transmission window sensor for sensing a state of the transmission window on one side edge of the transmission window, and the current supplier controls whether to supply current based on the state of the transmission window sensed by the transmission window sensor Oral Scanner that can prevent fogging.
5. The method of claim 4,
Wherein the heat generating member is connected to the current supply unit by a conductive line to receive a current.
The method according to claim 1,
Wherein the heating member is a heat ray or a resistive substance that generates heat when an electric current flows.
The method according to claim 1,
Wherein the heat generating member is a transparent material.
delete The method according to claim 1,
Wherein the body further comprises a control unit for processing data of the scanned tooth.
11. The method of claim 10,
The control unit
An optical sensing unit for calculating positional information of a subject to be scanned corresponding to an electric signal outputted from an optical sensor which is reflected from the subject tooth and is reflected by the optical system unit,
And a three-dimensional data generator for generating three-dimensional data for generating a three-dimensional model of the object tooth to be scanned based on the sensing values received from the optical sensing unit and the reflection angle of the optical system unit. scanner.

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