KR102197111B1 - Measurement System and Method of Remained Adhesive Quantity on The Tooth Surface - Google Patents

Abstract

The present invention relates to a system for measuring adhesive residues on a tooth surface and a method for measuring adhesive residues.According to the present invention, using an optical coherence tomography device, light is incident on the tooth surface to receive light reflected or scattered. A tomographic image acquisition step of obtaining a tomographic image of the tooth; An adhesion residue determination step of determining the presence or absence of an adhesive residue remaining on the tooth surface by using a plurality of tomographic images obtained in the tomographic image acquisition step and obtaining physical information on the adhesive residue; And an information providing step in which information is provided so that the user can recognize the physical information on the adhesive residue obtained in the residue grasping step; thus, information on the adhesive residue remaining on the surface of the tooth is measured. Thus, since it is provided to the user, a technology is disclosed that increases the accuracy of removing adhesive residues and suppresses damage to teeth when removing adhesive residues.

Description

Measurement System and Method of Remained Adhesive Quantity on The Tooth Surface}

The present invention relates to an adhesive residue measuring system and an adhesive residue measuring method, and more particularly, to remove the adhesive residue remaining on the tooth surface after removal of the orthodontic appliance by using an optical interference tomographic image to the adhesive residue on the tooth surface. It relates to a measuring system and measuring method that can grasp water.

In recent years, as interest in beauty or plastic surgery increases, orthodontic treatments for correcting teeth to be evenly increased are also increasing. There are various technologies related to orthodontics, and among them, orthodontics using orthodontic brackets are widely used.

In orthodontic surgery using an orthodontic bracket, an orthodontic bracket is adhered to a dental enamel by attaching a band to which the bracket is attached to each of a plurality of teeth. In order to adhere the orthodontic bracket to the teeth, an orthodontic adhesive such as a high viscosity resin paste is commonly used.

After a certain period of time has elapsed after the orthodontic bracket is adhered to the teeth using such an orthodontic adhesive, the orthodontic bracket is separated and removed from the teeth when the orthodontic treatment is completed.

In this process, the orthodontic adhesive must also be removed. When removing the orthodontic bracket, the cured orthodontic adhesive is also removed, but it is not completely removed from the tooth and some orthodontic adhesive remains on the tooth surface in many cases.

Therefore, conventionally, the dentist predicted the amount of residual adhesive by visual observation and removed the residual adhesive. However, since it is very difficult to accurately distinguish between the tooth surface and the adhesive with the naked eye, the accuracy of removing the residual adhesive was degraded, and the damage to the tooth was also increased.

Therefore, there has been a demand for a technology capable of accurately grasping the adhesive remaining on the tooth surface so that only the adhesive can be removed without damaging the tooth surface.

Korean Patent Registration No. 10-1565802 Korean Patent Registration No. 10-1743374

An object of the present invention is to solve the conventional problems as described above, to provide an adhesive residue measuring system and adhesive residue measuring method capable of measuring the adhesive residue remaining on the tooth surface.

A method for measuring adhesion residues on a tooth surface according to an embodiment of the present invention for achieving the above object is, by using an optical coherence tomography apparatus, light is incident on the tooth surface to receive reflected or scattered light. A tomographic image acquisition step of obtaining a tomographic image of the tooth; An adhesion residue determination step of determining the presence or absence of an adhesive residue remaining on the tooth surface by using a plurality of tomographic images obtained in the tomographic image acquisition step and obtaining physical information on the adhesive residue; And an information providing step in which information is provided so that a user can recognize physical information on the adhesive residue obtained in the residue grasping step.

Here, in the step of determining the adhesion residue, a pre-processed image in which a pixel line is formed with pixels having a pixel intensity equal to or higher than a predetermined reference value for each of the plurality of tomographic images sequentially obtained in the tomographic image acquisition step A pretreatment step of forming; And determining the presence or absence of the adhesive residue by comparing the pixel lines on the plurality of preprocessed images formed in the preprocessing step, and forming a three-dimensional rendering image of the adhesive residue so that the user can recognize it. It may be another feature that includes;

Further, the physical information on the adhesive residue provided to the user in the information providing step includes at least one or more of the area occupied by the adhesive residue on the tooth surface, the volume of the adhesive residue, and the shape of the adhesive residue. It can also be characterized as another feature.

Here, in the pre-processing step, when the pixel intensity in the tomography image is less than the reference value, the pixel intensity is set to 0, and when the pixel intensity is greater than the reference value, the pixel intensity is set to 255, so that the preprocessed image in which the pixel line is formed Forming may be another feature.

In addition, the comparison of the pixel lines performed in the determination step is to compare the pixel line of the N-th pre-processed image (N: a positive integer) with the pixel line of the N+1-th pre-processed image, and the same X-axis Comparing the Y-axis coordinate components between the corresponding pixels by having the coordinate components, and when the gap difference between the Y-axis coordinate components in at least one or more pixels is greater than the reference interval, the N-th preprocessed image is set as the reference image. Another feature may be to determine that the N+1 th pre-processed image corresponds to a tooth portion where the presence of the adhesive residue begins.

Further, in the determination step, based on the pixel line on the reference image set in advance, the pixel lines on the preprocessed image in the order of N+1 and subsequent times are compared sequentially, and N+a-th (a: 2 or more) In the comparison with the pixel line on the pre-processed image of (integer), the gap difference in the Y-axis coordinate component is greater than the reference interval by comparing the Y-axis coordinate components of the pixels corresponding to each other by having the same X-axis coordinate component. If there is none, it may be determined that the N+a-th pre-processed image corresponds to the tooth portion where the presence of the adhesive residue ends, and the N-th pre-processed image is released from the reference image.

Further, in the determination step, when the reference image is set or released, the pixel line of the M-th pre-processed image (M: positive integer) and the M+1-th pre-processed of the plurality of pre-processed images The comparison with the pixel line of the image is to compare the Y-axis coordinate components of the pixels that correspond to each other by having the same X-axis coordinate component, but if the gap difference in the Y-axis coordinate component is not larger than the reference interval, M+ Another feature may be to determine that the first pre-processed image corresponds to a tooth portion in which the adhesive residue is absent.

Further, in the determination step, a pixel line obtained by averaging the pixel lines on the plurality of pre-processed images determined to correspond to a tooth portion in which the adhesive residue is absent is set as a tooth surface line. You may.

Furthermore, in the comparison judgment with the pixel line made in the determination step, pixels having the same X-axis coordinate component and corresponding pixels are compared with each other, so that only pixels having a gap difference between the Y-axis coordinate components greater than the reference interval are compared. Another feature may be that pixels that are left on the pixel line and have a gap difference between the Y-axis coordinate components equal to or less than the reference interval are removed from the pixel line to form a residual surface pixel line.

Furthermore, in the determination step, a tomographic image of the adhesive residue by reflecting the tooth surface line for each of the N+1th pre-processed image determined to be present to the N+a-1th pre-processed image. It may be another feature to form.

Furthermore, in the determination step, another feature may be that the area occupied by the adhesive residue on the tooth surface or the volume of the adhesive residue is calculated using a-2 tomographic images of the adhesive residue.

Furthermore, in the determination step, it may be another feature of forming the three-dimensional rendering image of the adhesive residue by using a-2 of the adhesive residue tomographic images.

A system for measuring adhesion residues on a tooth surface according to an embodiment of the present invention for achieving the above object comprises: an optical coherence tomography apparatus for obtaining an optical coherence tomography image by irradiating light onto the teeth; And a connection to receive information from the optical coherence tomography apparatus, receiving an optical coherence tomography image from the optical coherence tomography apparatus, determining the presence or absence of an adhesive residue remaining on the tooth surface, and In the case where the adhesive residue is present, an information processing device that processes and provides physical information on the adhesive residue so that a user can recognize it is provided.

Here, the information processing apparatus includes: a communication unit receiving the optical coherence tomography image from the side of the optical coherence tomography apparatus; A data storage unit for storing the optical interference tomography image transmitted to the communication unit; The optical interference tomography image transmitted from the communication unit is stored in the data storage unit, and the presence or absence of the adhesive residue on the tooth surface is determined based on a plurality of optical interference tomography images stored in the data storage unit, and the adhesion on the tooth surface A central processing unit that obtains physical information on the adhesive residue when there is a residue; And an output unit for outputting physical information on the adhesive residue received from the central processing unit so that a user can recognize it.

The adhesive residue measuring system and the adhesive residue measuring method on the tooth surface according to the present invention measure and provide information on the adhesive residue remaining on the tooth surface, thereby increasing the accuracy of the adhesive residue removal and There is an effect that can suppress the damage to the teeth when removing the residue.

1 is a diagram schematically showing a system for measuring adhesive residues on a tooth surface according to an embodiment of the present invention.
2 is a diagram schematically showing an information processing apparatus of a system for measuring adhesive residues on a tooth surface according to an embodiment of the present invention.
3 is a flow chart schematically showing a method of measuring an adhesive residue on a tooth surface according to an embodiment of the present invention.
4 and 5 are schematic conceptual diagrams for explaining determining the presence or absence of an adhesive residue on a tooth surface in a method for measuring an adhesive residue on a tooth surface according to an embodiment of the present invention.
6 is a diagram schematically illustrating a tooth surface line and a residual surface pixel line obtained in a method of measuring an adhesion residue on a tooth surface according to an embodiment of the present invention.
7 is a diagram schematically showing a partial side cross-sectional view and a plan view of an adhesive residue obtained in a method for measuring an adhesive residue on a tooth surface according to an embodiment of the present invention.

Hereinafter, a preferred embodiment will be described with reference to the accompanying drawings so that the present invention may be more specifically understood.

1 is a diagram schematically showing a system for measuring adhesive residues on a tooth surface according to an embodiment of the present invention, and FIG. 2 is a schematic diagram illustrating an information processing apparatus of a system for measuring adhesive residues on a tooth surface according to an embodiment of the present invention. It is a figure shown.

First, a system for measuring adhesive residues on a tooth surface capable of performing a method for measuring adhesive residues on a tooth surface according to an embodiment of the present invention is described with reference to FIGS. 1 and 2, and then on a tooth surface according to an embodiment of the present invention. The method of measuring the adhesive residue will be described below.

1 to 2, a system for measuring adhesion residues on a tooth surface according to an embodiment of the present invention includes an optical coherence tomography apparatus and an information processing apparatus.

The optical coherence tomography apparatus acquires multiple tomographic images of teeth by using optical interference. Such an optical coherence tomography apparatus includes a light source 100, an optical splitter 200, a reference end 300, a measurement end 400, and a signal collector 500.

The light source 100 forms light for obtaining a tomographic image of the tooth 10. The light formed by the light source 100 is transferred to the optical splitter 200. As a light source, a white light source or a swept source may be used.

The optical separator 200 separates the light formed from the light source 100 and transmits the separated light to the reference end 300 and the measurement end 400, respectively.

The measuring stage 400 makes the light moving from the optical separator 200 incident on the tooth 10. The light moved to the measurement stage 400 is condensed by an objective lens (not shown) and is incident on the tooth 10, and some of the incident light is reflected or scattered and returned.

A reference mirror (not shown) is provided in the reference stage 300, and the light separated by the optical separator 200 is reflected through the reference mirror and sent back.

The signal collector 500 is a photodetector, and extracts an optical interference signal or an optical interference spectrum by combining the light reflected from the reference terminal 300 and the light moved from the measurement terminal 400 together, and the optical interference tomography image is Is formed. The formed optical interference tomography image is transmitted to the information processing device 600 side.

The information processing apparatus 600 receives a plurality of optical coherence tomography images from the signal collector 500 of the optical coherence tomography apparatus, and provides information processing so that the user can grasp the adhesive residue 20 on the surface of the tooth 10. .

The information processing apparatus 600 includes a central processing unit 610, a data storage unit 620, a communication unit 630, and an output unit 640 as shown in FIG. 2. Here, if necessary, an input unit 650 may be further included.

The communication unit 630 receives a plurality of optical coherence tomography images from the signal collector 500 side of the optical coherence tomography apparatus and transmits them to the central processing unit 610.

The central processing unit 610 stores a plurality of optical interference tomography images transmitted through the communication unit 630 in the data storage unit 620. In addition, based on a plurality of optical interference tomographic images stored in the data storage unit 620, the presence or absence of the adhesion residue 20 on the surface of the tooth 10 is determined, and the image of the adhesion residue 20, the area occupied on the tooth surface. , To obtain physical information about the adhesive residue (20), such as volume.

In addition, the central processing unit 610 may store physical information on the adhesive residue 20 in the data storage unit 620, and the output unit 610 so that the user can grasp the physical information on the adhesive residue 20 640).

The output unit 640 receives physical information on the adhesive residue 20 from the central processing unit 610 and outputs it so that the user can visually recognize it. As an example of such an output unit 640, a monitor device may be heard, and a user may grasp the area, volume, or three-dimensional shape that the adhesive residue 20 occupies on the tooth surface through the output unit 640.

The method of measuring the adhesive residue on the tooth surface according to an embodiment of the present invention may be performed using such a system for measuring the adhesive residue on the tooth surface.

Next, a method of measuring an adhesive residue on a tooth surface according to an embodiment of the present invention will be described with further reference to FIGS. 3 to 7.

3 is a flow chart schematically showing a method of measuring an adhesive residue on a tooth surface according to an embodiment of the present invention, and FIGS. 4 and 5 are a method for measuring an adhesive residue on a tooth surface according to an embodiment of the present invention. It is a schematic conceptual diagram for explaining the determination of the presence or absence of water, and FIG. 6 is a diagram schematically showing a tooth surface line and a residual surface pixel line obtained in a method for measuring adhesion residue on a tooth surface according to an embodiment of the present invention, 7 is a diagram schematically showing a partial side cross-section and plane of an adhesive residue obtained in a method for measuring an adhesive residue on a tooth surface according to an embodiment of the present invention.

3, the method of measuring the adhesion residue on the tooth surface according to an embodiment of the present invention includes a tomographic image acquisition step (S100), an adhesion residue determination step (S200), and an information provision step (S300). .

<< S100 >>

The tomography image acquisition step (S100) is a step in which light is incident on the surface of the tooth 10 to receive the reflected or scattered light using an optical coherence tomography apparatus to obtain a tomography image of the tooth 10 .

The tomographic image of the tooth 10 obtained through the optical coherence tomography apparatus schematically shown in FIG. 1 is transmitted from the signal collector 500 to the communication unit 630 of the information processing apparatus 600.

The tomographic images transmitted to the communication unit 630 of the information processing apparatus 600 are sequentially stored in the data storage unit 620 by the central processing unit 610.

<< S200 >>

In the determination of the adhesive residue (S200), determination of the presence or absence of the adhesive residue (20) remaining on the surface of the tooth 10 by using a plurality of tomographic images sequentially obtained in the tomographic image acquisition step (S100) Physical information about the adhesive residue 20 is obtained.

The bonding residue determination step (S200) may include a pretreatment step (S210) and a determination step (S220).

<S210>

The pre-processing step (S210) is a pre-processed image in which a pixel line is formed with pixels having a pixel intensity equal to or higher than a predetermined reference value for each of a plurality of tomographic images sequentially acquired in the tomographic image acquisition step (S100). Is the step of forming.

Here, the pre-processed image in which the pixel line is formed may be formed by setting the pixel intensity to 0 when the pixel intensity is less than the reference value in the tomographic image, and by setting the pixel intensity to 255 when the pixel intensity is greater than or equal to the reference value.

The central processing unit 610 sequentially loads a plurality of optical interference tomography images stored in the data storage unit 620 one by one.

As shown in FIG. 4, an optical coherence tomography image is obtained by sequentially scanning the tooth 10 in the direction in which the scan proceeds, and as described above, the optical coherence tomography images are stored in the data storage unit 620 Is stored in.

Then, one by one, the optical coherence tomography image is sequentially loaded from the data storage unit 620, and then the pixel intensity of the pixels in the optical coherence tomography image is compared with a reference value to form a preprocessed image.

Here, if the reference value of the pixel intensity is set to 110, the pixel intensity is set to 0 for pixels whose pixel intensity is less than 110 in the optical interference tomography image. In addition, for pixels whose pixel intensity is greater than or equal to the reference value of 110, the pixel intensity is set to 255.

As the pixel intensity is reset as described above, only pixels with an original pixel intensity of 110 or more remain, and a pixel line is formed with pixels whose pixel intensity is set to 255.

In this way, the preprocessed image in which the pixel line is formed is formed from the optical interference tomographic image. If necessary, the pre-processed images formed in the pre-processing step (S210) may also be stored in the data storage unit 620 by the central processing unit 610, which is also preferable.

<S220>

The determination step (S220) determines the presence or absence of the adhesive residue 20 by comparing the pixel lines on the plurality of preprocessed images formed in the preprocessing step (S210), and 3 for the adhesive residue 20 so that the user can recognize it. This is the step of forming a dimensional rendering image.

The comparison of the pixel lines of the preprocessed image performed in the determination step S220 may be performed as follows.

Basically, the comparison of the pixel line of the M-th pre-processed image and the pixel line of the M+1 pre-processed image among a number of pre-processed images is to compare the Y-axis coordinate components of the corresponding pixels by having the same X-axis coordinate component. However, if the gap difference in the Y-axis coordinate component of the pixel is not greater than the reference gap, it is determined that the M+1 preprocessed image corresponds to the portion of the tooth 10 where the adhesive residue 20 is absent. Here, M is an arbitrary positive integer.

For example, when comparing the pixel line of the 3rd preprocessed image and the pixel line of the 4th preprocessed image, a pixel belonging to the pixel line of the 3rd preprocessed image and the pixel coordinates of (5,10) and the pixel line of the 4th preprocessed image It compares the pixels with the pixel coordinates of (5,8).

In this case, if the reference interval is 3, the Y-axis coordinate components of the two pixels to be compared are 10 and 8, and the gap difference is 2, so it is determined that it is smaller than the reference interval 3, and the pixel line at the point where the X-axis coordinate component is 5 is adhered. It is determined that the residue 20 does not exist.

In this way, each pixel from the beginning to the end of the pixel line is compared with the corresponding pixel, and a comparison and judgment is made whether there is a pixel representing a difference in which the Y-axis coordinate component is greater than the reference interval.

As a result, if there is no pixel showing a difference greater than the reference interval, the fourth pre-processed image is determined to correspond to the portion where there is no adhesive residue 20 on the surface of the tooth 10, and the pixel line of the fourth pre-processed image The next step is to compare and judge the pixel line of the 5th preprocessed image in the same way as above.

Such a determination is made before the reference image is set or in the case of being released. Here, the reference image refers to a pre-processed image serving as a reference for comparison in order to determine whether the pre-processed image corresponds to a portion of the tooth 10 where adhesive residues remain.

In addition, a pixel line obtained by averaging a plurality of pre-processed image pixel lines determined to correspond to a portion of the tooth 10 in which the adhesive residue 20 is absent among the plurality of pre-processed images is referred to as a tooth surface line 702 (see FIG. 6). Set to

The setting of the reference image and the determination of the presence of the adhesive residue can be made as follows.

The comparison of the pixel lines performed in the determination step S220 may be performed by comparing the pixel lines of the Nth preprocessed image and the pixel lines of the N+1th preprocessed image. Where N is any positive integer. And, by comparing the Y-axis coordinate components of the corresponding pixels by having the same X-axis coordinate component, if the gap difference between the Y-axis coordinate components in at least one or more pixels is greater than the reference interval, the N-th preprocessed image is referenced. Set as an image.

Then, it is determined that the N+1th preprocessed image corresponds to a tooth portion where the presence of the adhesive residue 20 starts.

When the reference image is set in this way, the N+2 preprocessed image is determined by comparing it with the Nth preprocessed image set as the reference image.

In FIG. 4, in the optical coherence tomography image and the preprocessed image scanned at the position indicated by reference numeral 710, it is an image of a portion where there is no adhesive residue 20 on the surface of the tooth 10, so the adhesive residue 20 appears. Does not.

In addition, since the optical interference tomography image and the preprocessed image scanned at the position of 720 are the image of the portion with the adhesive residue 20, the thickness according to the presence of the adhesive residue 20 in the optical interference tomography image and the preprocessed image. Is reflected.

A preprocessed image of the optical coherence tomography image scanned at the position 710 in FIG. 4 is shown at 710 in FIG. 5. Similarly, a pre-processed image of the optical coherence tomography image scanned at the location of reference numeral 720 is shown in reference numeral 720 of FIG. 5.

And, for the convenience of understanding, a state in which the pre-processed image 710 and the pre-processed image 720 are overlapped is shown on the right side of FIG. 5.

Here, the pixel line of reference numeral 712 and the pixel line of reference numeral 722 overlap at a portion where there is no adhesive residue 20. That is, if the X-axis coordinate component and the Y-axis coordinate component of each pixel belonging to the pixel line are the same in the pixel line to be compared, the pixel line overlaps.

However, in the portion where the adhesive residue 20 is located, it does not overlap and a difference appears. In other words, since the two pixels have the same X-axis coordinate component and the Y-axis coordinate components of the two pixels that correspond to each other are different, the two pixel lines become a part that does not overlap.

Therefore, if the gap difference (d) between the two pixel lines is larger than the reference gap, it is determined that the adhesive residue 20 is present.

Here, it is also preferable that the reference interval is set to 3 pixels. When the reference interval is set to 3 pixels, a portion in which the gap difference between the two pixel lines is 3 pixels or more is determined as a portion where the adhesive residue 20 exists.

And, if there is a pixel with a gap difference greater than the reference interval, it is determined that the corresponding pre-processed image corresponds to the portion where the adhesive residue 20 is located, and the pre-processed image of the order immediately preceding the comparison reference is set as the reference image. . Then, it becomes the standard to be compared with the preprocessed image of the next sequence.

In FIG. 5, when comparing the pixel line 712 of the preprocessed image 710 with the pixel line 722 of the preprocessed image 720 in FIG. 5, the adhesive residue 20 is overlapped on the right side of FIG. The pixel line 724 corresponding to the surface portion does not overlap, and the two pixel lines 712 and 722 overlap in a portion where there is no adhesive residue 20. Here, the pixel line of reference numeral 712 and the pixel line of reference numeral 724 represent the gap difference (d) in the Y-axis component, and if this gap difference is greater than the reference interval, it is set as a preprocessed image of reference numeral 710. The pixel line is the reference for comparison.

Therefore, the pre-processed image at the position corresponding to the next reference numeral 730 (refer to FIG. 4) is compared with the reference image 710 to determine whether or not the adhesive residue 20 exists.

The comparative judgment at the portion where the presence of the adhesive residue 20 ends may be made as follows.

Based on the pixel line on the preset reference image, it is compared sequentially with the pixel lines on the preprocessed image of the N+1th or later, but has the same X-axis coordinate component in comparison with the pixel line of the N+ath preprocessed image. If there is no gap difference in the Y-axis coordinate component greater than the reference interval by comparing the Y-axis coordinate components of the pixels corresponding to each other, the N+a-th pre-processed image is considered to correspond to the tooth portion where the presence of the adhesive residue ends. It is determined, and the N-th preprocessed image, which is the reference image, is released from the reference image. Here, a means a positive integer of 2 or more.

In FIG. 4, when the preprocessed image corresponding to the position of reference numeral 710 is the reference image, the comparison with the preprocessed image corresponding to the position of reference numeral 770 is determined to have a contact residue 20 as described above.

However, when comparing the reference image with the preprocessed image corresponding to the position of reference numeral 780, the Y-axis coordinate components of the corresponding pixels have the same X-axis coordinate component, so that there is no contact residue 20. Since it is a part, there will be no gap difference in the Y-axis coordinate component greater than the reference gap.

Accordingly, it is determined that the pre-processed image corresponding to the reference numeral 780 corresponds to the tooth portion where the existence of the adhesive residue 20 is terminated.

In addition, the number of pre-processed images corresponding to the portion with the adhesive residue 20 is also identified and used for calculating the area or volume occupied by the adhesive residue 20 on the surface of the tooth 10.

In addition, when it is determined that the image is a pre-processed image corresponding to the portion of the tooth 10 with the adhesive residue 20, the residue surface pixel line 704 is formed.

In other words, by comparing the Y-axis coordinate component with the pixel line by having the same X-axis coordinate component, only pixels with a gap difference between the Y-axis coordinate component greater than the reference interval are left in the pixel line by comparing the Y-axis coordinate component with each other. Pixels having an interval difference between the axis coordinate components equal to or less than the reference interval are removed from the pixel line to form a residual surface pixel line 704 as shown in FIG. 6.

In addition, by reflecting the tooth surface line 702 for each of the N+1 pretreatment image to the N+a-1 pretreatment image judged that the adhesive residue 20 exists, the residual as shown in FIG. A tomographic image of the adhesion residue in which the water surface pixel line 704 and the tooth surface line 702 appear is formed.

At this time, the total number of tomographic images of adhesive residues from the N+1 pre-processed image to the N+a-1 pre-processed image determined to be present is a-2.

In FIG. 6, a schematic view of one adhesive residue tomographic image in which the residue surface pixel line 704 and the tooth surface line 702 are expressed is schematically shown.

After the adhesion residue tomography image is formed in this way, the area occupied by the adhesion residue 20 on the surface of the tooth 10 or the volume of the adhesion residue is calculated using a-2 adhesion residue tomography images.

In the case of area, information on the horizontal length, vertical length and number of pixels of the range measured when obtaining an optical interference tomography image can be known. Based on this, the area of the adhesive residue 20 is calculated as a ratio of the area occupied by the adhesive residue 20 with a rectangle having a maximum horizontal length and a maximum vertical length of the adhesive residue 20.

As for the volume, the height average value of the contact residue 20 is obtained using the residue surface pixel line 704. Then, the volume of the contact residue 20 is calculated by multiplying the average height of the contact residue 20 by the area of the contact residue 20.

In addition, a three-dimensional rendering image of the adhesive residue 20 may be formed by using a-2 adhesive residue monolayer images.

Such an adhesive residue determination step (S200) may be performed by the central processing unit 610, and the area occupied by the adhesive residue 20 on the surface of the tooth 10 or the volume of the adhesive residue 20 and the adhesive residue A three-dimensional rendering image of the water 20 is transmitted to the output unit 640. Accordingly, through the output unit 640, the user can grasp information on the adhesive residue 20.

The bonding residue determination step (S200) as described above is executed by the central processing unit 610.

<< S300 >>

The information providing step (S300) is a step in which information is provided so that the user can recognize physical information on the adhesive residue 20 obtained in the adhesive residue determination step (S200).

Physical information on the adhesive residue 20 provided to the user in the information providing step (S300) includes the area occupied by the adhesive residue 20 on the surface of the tooth 10, the volume of the adhesive residue 20, and the adhesive residue. It is preferable to include at least any one or more of the form (20).

This information providing step (S300) may be performed by an output unit 640 such as a display device under the control of the central processing unit 610, and through the output unit 640, the user can use the adhesive residue on the surface of the tooth 10 You can get information about (20)

7 schematically shows a side cross-sectional view and a plan view of an adhesive residue 20 that may be shown through a monitor display, which is an example of the output unit 640.

7 shows the tooth surface line 706 and the residual surface pixel line 708, and displays the difference in color or brightness according to the thickness so that the user can grasp the thickness of the adhesive residue 20. By doing so, it is possible to provide the user with an easy visual grasp.

Alternatively, by displaying the shape of the adhesive residue 20 as a three-dimensional rendering image, the user may be able to grasp three-dimensionally.

As described above, the adhesive residue measuring system and the adhesive residue measuring method on the tooth surface according to the present invention provide information on the adhesive residue remaining on the tooth surface, thereby improving the accuracy of removing the adhesive residue, There is an advantage that can suppress damage to teeth when removing adhesive residues.

As described above, a detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings, but the above-described embodiments are only described with reference to preferred embodiments of the present invention, so that the present invention is described above. It should not be construed as being limited to the embodiments, and the scope of the present invention should be understood as the following claims and equivalent concepts.

10: tooth 20: adhesive residue
100: light source 200: optical separator
300: reference stage 400: measuring stage
500: signal collector
600: information processing device
610: central processing unit 620: data storage unit
630: communication unit 640: output unit
650: input

Claims (14)

A tomographic image acquisition step of acquiring a tomographic image of the tooth by injecting light onto the tooth surface and receiving the reflected or scattered light using an optical coherence tomography apparatus;
An adhesion residue determination step of determining the presence or absence of an adhesive residue remaining on the tooth surface by using a plurality of tomographic images obtained in the tomographic image acquisition step and obtaining physical information on the adhesive residue; And
Including; an information providing step in which information is provided so that the user can recognize the physical information on the adhesive residue obtained in the residue grasping step,
The step of determining the adhesive residue,
A pre-processing step of forming a pre-processed image in which pixel lines are formed with pixels having a pixel intensity equal to or higher than a predetermined reference value for each of the plurality of tomographic images sequentially obtained in the tomographic image acquisition step; And
A determination step of comparing the pixel lines on the plurality of preprocessed images formed in the preprocessing step to determine the presence or absence of the adhesive residue, and forming a three-dimensional rendering image of the adhesive residue so that the user can recognize it Characterized in that it comprises;
How to measure adhesion residue on the tooth surface.
delete The method of claim 1,
The physical information on the adhesive residue provided to the user in the information providing step includes at least one of an area occupied by the adhesive residue on the tooth surface, a volume of the adhesive residue, and a shape of the adhesive residue. Characterized by,
How to measure adhesion residue on the tooth surface.
The method of claim 1,
In the pretreatment step,
In the tomographic image, when the pixel intensity is less than the reference value, the pixel intensity is set to 0, and when the pixel intensity is greater than the reference value, the pixel intensity is set to 255, thereby forming the preprocessed image in which the pixel line is formed,
How to measure adhesion residue on the tooth surface.
The method of claim 1,
The comparison of the pixel lines made in the determination step,
Comparing the pixel line of the N-th pre-processed image (N: positive integer) and the pixel line of the N+1-th pre-processed image,
When the Y-axis coordinate component is compared with each other by having the same X-axis coordinate component, and the gap difference between the Y-axis coordinate component in at least one or more pixels is greater than the reference interval,
The N-th pre-processed image is set as a reference image, and the N+1-th pre-processed image is determined to correspond to a tooth portion where the presence of the adhesive residue begins,
How to measure adhesion residue on the tooth surface.
The method of claim 5,
In the determination step,
The pixel lines on the preset reference image are compared with the pixel lines on the preprocessed image sequentially after the N+1th as a comparison reference,
In comparison with the pixel line on the preprocessed image of the N+a-th (a: a positive integer greater than or equal to 2),
Comparing the Y-axis coordinate components of the pixels that correspond to each other by having the same X-axis coordinate component, and if there is no gap difference in the Y-axis coordinate component greater than the reference interval,
It is determined that the N+a-th preprocessed image corresponds to the tooth portion where the presence of the adhesive residue ends,
It characterized in that the N-th preprocessed image is released from the reference image,
How to measure adhesive residue on the tooth surface.
The method of claim 6,
In the determination step,
Before the reference image is set or is in a state of being released,
A comparison determination between the pixel line of the M-th pre-processed image (M: positive integer) among the plurality of pre-processed images and the pixel line of the M+1-th pre-processed image is,
By having the same X-axis coordinate component, compare the Y-axis coordinate component of the pixels corresponding to each other,
If the gap difference in the Y-axis coordinate component is not greater than the reference gap, it is characterized in that it is determined that the M+1 th pre-processed image corresponds to a tooth portion in which the adhesive residue is absent,
How to measure adhesion residue on the tooth surface.
The method of claim 7,
In the determination step,
A pixel line obtained by averaging the pixel lines on the plurality of pre-processed images determined to correspond to a tooth portion in which the adhesive residue is absent is set as a tooth surface line,
How to measure adhesion residue on the tooth surface.
The method of claim 8,
In the comparison judgment with the pixel line made in the judgment step,
By having the same X-axis coordinate component, the Y-axis coordinate component is compared between the corresponding pixels, and only pixels with a gap difference of the Y-axis coordinate component greater than the reference interval are left in the pixel line, and the gap difference between the Y-axis coordinate component is the reference interval. The following pixels are removed from the pixel line to form a residual surface pixel line,
How to measure adhesion residue on the tooth surface.
The method of claim 9,
In the determination step,
Forming a tomographic image of the adhesion residue by reflecting the tooth surface line for each of the N+1th pre-processed image determined to have the adhesion residue to the N+a-1th pre-processed image. ,
How to measure adhesion residue on the tooth surface.
The method of claim 10,
In the determination step,
characterized in that the area occupied by the adhesive residue on the tooth surface or the volume of the adhesive residue is calculated using a-2 pieces of the adhesive residue tomographic image,
How to measure adhesion residue on the tooth surface.
The method of claim 10,
In the determination step,
a, characterized in that forming the three-dimensional rendering image of the adhesive residue by using the two adhesive residue tomographic images
How to measure adhesion residue on the tooth surface.
An optical coherence tomography apparatus for obtaining an optical coherence tomography image by irradiating light onto the teeth; And
It is connected so as to receive information from the optical coherence tomography apparatus, and by receiving the optical coherence tomography image from the optical coherence tomography apparatus, it judges the presence or absence of adhesive residues remaining on the tooth surface, and on the tooth surface Including; and an information processing device for processing and providing physical information on the adhesive residue so that a user can recognize physical information on the adhesive residue when the adhesive residue exists,
The information processing device,
For each of the plurality of sequentially acquired optical interference tomography images, a pre-processed image in which pixel lines are formed with pixels having a pixel intensity equal to or higher than a predetermined reference value is formed, and the pixel lines on the plurality of pre-processed images are compared. And determining the presence or absence of the adhesive residue, and forming a three-dimensional rendering image of the adhesive residue so that the user can recognize it,
Adhesive residue measurement system on the tooth surface.
The method of claim 13,
The information processing device,
A communication unit receiving the optical coherence tomography image from the side of the optical coherence tomography apparatus;
A data storage unit for storing the optical interference tomography image transmitted to the communication unit;
The optical interference tomography image transmitted from the communication unit is stored in the data storage unit, and the presence or absence of the adhesive residue on the tooth surface is determined based on a plurality of optical interference tomography images stored in the data storage unit, and the adhesion on the tooth surface A central processing unit that obtains physical information on the adhesive residue when there is a residue; And
And an output unit for outputting physical information on the adhesive residue received from the central processing unit so that a user can recognize it.
Adhesive residue measurement system on the tooth surface.

Images