KR20230063988A - Method for generating relief region and apparatus for designing denture therefor - Google Patents

Abstract

A method for creating a relief area and a prosthetic design device therefor are disclosed. A method for generating a relief region, a method for generating a relief region, and a denture design device for the same according to an embodiment generate a relief region including at least one of an incisal papilla and a median palatal suture from patient data, and apply a predetermined thickness profile to the created relief region. According to the application, the user's operation can be minimized, the inconvenience can be reduced, and the aesthetic satisfaction of the patient can be increased.

Description

Method for generating relief region and denture design device therefor {Method for generating relief region and apparatus for designing denture therefor}

The present invention relates to dental image processing technology, and more particularly, to a technology for designing dentures using dental images.

When a tooth or tissue around the tooth is damaged, the function and aesthetics of the tooth can be restored through prosthetic treatment using an artificial prosthesis. When one or more teeth are partially damaged, a crown covering the upper side of the damaged teeth may be manufactured and used as a prosthesis. However, when one or more teeth are missing, dentures (dentures) connecting both teeth and the missing part can be used as if a bridge is constructed using the surrounding teeth as pillars.

Dentures (dentures) are divided into partial dentures (partial dentures), which can be used by patients with some remaining teeth, and complete dentures (complete dentures), which restore teeth and absorbed gums in the absence of teeth at all. It can be.

Relief work is essential in manufacturing dentures. Relief is an operation in which a predetermined amount of space is given to a specific part of the denture so as not to come into direct contact with the tissue in order to reduce the stimulation applied by the denture to the tissue (eg, gum and tooth tissue) based on the patient's data.

In order to execute the relief operation using the program, the user must create a relief area where necessary as if drawing a picture directly using the mouse on the patient data. Therefore, there are cases in which the user needs to manipulate (eg, click) several times where a large amount of relief is required, and the user has to manually manipulate and create a relief area each time in an area where manipulation is essential. There is, and the result may be different depending on the user's skill level.

According to one embodiment, as the device automatically creates and provides a relief area for performing the relief required in manufacturing dentures, a method for creating a relief area that improves user convenience and a denture design device therefor Suggest.

Furthermore, as the device accurately generates and provides a relief area, a method for generating a relief area with improved accuracy and a denture design device therefor are proposed.

A method for generating a relief area, according to an embodiment, includes obtaining patient data, generating a relief area including at least one of an incisal papilla and a midpalatal suture from the obtained patient data, and generating the generated relief area. and applying a predetermined thickness profile to

The step of creating a relief area includes the steps of extracting a landmark for an incisive papilla (IP) from maxillary data, which is patient data, and generating an IP relief area including the landmark for the incisive papilla. can include

The step of creating a relief area includes extracting landmarks related to the incisal papilla and posterior palatal closure from maxillary data, which is patient data, and suturing the mid-palatal from the maxillary data using the landmarks related to the incisal papilla and posterior palatal closure. Extracting (MPR: Median Palatine Raphae) and generating an MPR relief region including the median palatine suture may be included.

The step of generating the MPR relief region including the mid-palatal suture is 2/3 in the posterior palatal closure direction when the distance to the rearmost part of the IP relief region and the posterior palatal closure is vertically divided into 3 parts for the maxillary data. A step of extracting a point that becomes , calculating an MPR distance by connecting the rearmost point of the IP relief area and the 2/3 points, and two points spaced apart from the center of the MPR distance by a predetermined distance in horizontal width. and generating an MPR relief region by connecting two points above and below the MPR distance.

The step of generating the relief area includes converting the patient's upper jaw data into inflection data including inflection information, extracting feature points from the converted inflection data, and generating a relief area including the extracted feature points. steps may be included.

The feature point may be at least one of an inflection point, a local maximum point, a local minimum point, and a vertex.

The step of generating a relief area including the extracted feature points may include measuring feature points around the incisor papilla in the inflection data and extracting a first measurement region connected to the measured feature points; The method may include generating an IP relief area by connecting points spaced apart by a preset distance from the measurement area.

The step of generating a relief area including the extracted inflection points may include measuring feature points from the rear end of the incisor nipple of the inflection data toward the posterior portion, and extracting a second measurement area connected to the measured feature points; It may include generating an MPR relief area connecting points spaced apart by a preset distance from the second measurement area.

The method of generating a relief area may further include generating a cleft palate relief area including cleft palate.

The method of generating the relief area may further include displaying a user graphic interface for modifying the generated relief area on a screen, and modifying the relief area by a user manipulation through the user graphic interface.

A denture design device according to another embodiment includes a data acquisition unit that acquires patient data, and generates a relief area including at least one of an incisor papilla and a median palatal suture from the obtained patient data, and in the created relief area It includes a control unit for applying a predetermined thickness profile and an output unit for displaying patient data including the relief area.

According to the relief area generation method and device according to an embodiment, as the device automatically creates and provides a relief area for performing the relief required in manufacturing dentures, user convenience can be improved. .

In particular, the device generates a relief area including at least one of an incisor papilla and a midpalatal suture from patient data and applies a predetermined thickness profile to the generated relief area, thereby minimizing user's manipulation and reducing the inconvenience. there is.

In addition, as the device generates and provides the relief area, accuracy is improved and aesthetic satisfaction of the patient can be increased.

Furthermore, since the relief area provided by the device can be further modified by the user, accuracy can be improved.

1 is a flow diagram illustrating a method for generating a relief area according to an embodiment of the present invention;
2 is a diagram illustrating an example of generating an IP relief area using IP according to an embodiment of the present invention;
3 is a diagram illustrating an example of generating an IP relief area using an MPR area according to an embodiment of the present invention;
4 is a diagram showing an example of inflection data conversion according to an embodiment of the present invention;
5 and 6 are diagrams illustrating examples of generating a relief area using inflection according to an embodiment of the present invention;
7 is a view showing the initial execution of relief according to an embodiment of the present invention;
8 is a view showing an example of setting the size of a relief area according to an embodiment of the present invention;
9 is a view showing the configuration of a denture design device according to an embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms, but only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted, and the terms described later will be used in the embodiments of the present invention. These terms are defined in consideration of the functions of and may vary depending on the user's or operator's intention or custom. Therefore, the definition should be made based on the contents throughout this specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention exemplified below may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

1 is a flow diagram illustrating a method for generating a relief area according to an embodiment of the present invention.

Referring to FIG. 1 , the denture design device acquires patient data (S110). The patient data may be scan data, in particular scan data of the upper jaw.

Subsequently, the denture design device includes at least one of an incisive papilla (IP, hereinafter referred to as 'IP') and a median palatal suture (MPR: Median Palatine Raphae, hereinafter referred to as 'MPR') from the obtained patient data. A relief area is created (S120). At this time, the denture design device may create a relief area according to a preset criterion, and may create a relief area by extracting feature points of data. Hereinafter, for convenience of description, the former is referred to as a 'first generation method' and the latter is referred to as a 'second generation method'.

Relief area creation using 'first generation method' For example, the denture design device extracts IP and posterior palatal closure from maxillary data, which is one of the patient data, extracts MPR using IP and posterior palatal closure, and then extracts An MPR relief region including the MPR may be created. Here, the MPR relief area may be an area including an MPR and a periphery within a predetermined distance from the MPR.

When creating the MPR relief area, the denture design device vertically divides the distance to the posterior end of the IP relief area and the posterior palatal closure using the upper jaw data, which is one of the patient data. extract the point Subsequently, MPR = distance is calculated by connecting the rearmost point of the IP relief area and the above 2/3 points. Subsequently, an MPR relief area may be created by connecting two points spaced apart from the center of the MPR distance by a predetermined distance in horizontal width and two points above and below the MPR distance. An example of generating an MPR relief area according to the 'first generation method' will be described later with reference to FIGS. 2 and 3 .

Relief area creation using 'second generation method' For example, in the relief area creation step (S120), the denture design device first converts maxillary data, which is one of patient data, into inflection data including inflection information. At this time, the inflection information of the inflection data 50 may be visually expressed, for example, through a color map, contrast, or numerical information.

Subsequently, the denture design device extracts feature points from the converted inflection data and then creates a relief area including the extracted feature points. The feature point may be, for example, an inflection point, a local maximum and minimum point, or a vertex. Among them, the inflection point is a point at a position where the concave shape changes in the curve, and means a point where the concave shape changes from an upward convex state to a downward convex state or from a downward convex state to an upward convex state. Hereinafter, inflection points will be mainly described among feature points, but other feature points can be equally applied.

For example, the denture design device may measure inflection points around the IP in the inflection data and extract a first measurement area connected to the measured inflection points. Subsequently, the denture design device may create an IP relief area by connecting points separated by a predetermined distance from the extracted first measurement area. An embodiment for this will be described later with reference to FIG. 4 .

As another example, the denture design device may measure inflection points of the inflection data from the rear end to the posterior direction, and extract a second measurement area connected to the measured inflection points. Subsequently, the denture design device may generate an MPR relief area connecting points spaced apart by a preset distance from the extracted second measurement area.

An example of generating an IP relief area and an MPR relief area according to the 'second generation method' will be described later with reference to FIGS. 4 to 6 .

In the relief area creation step (S120), the denture design device may additionally create a palatal wrinkle relief area including the palatal wrinkles in addition to the aforementioned IP and MPR. Here, the cleft palate relief area is an area including cleft palate and a periphery within a predetermined distance from the crumpled crinkle.

After the relief area creation step ( S120 ), the denture design device may display a user graphic interface for modifying the relief area on the screen, and may modify the relief area by user manipulation through the user graphic interface. For example, the size (width, length) of the relief area can be modified. An embodiment for this will be described later with reference to FIG. 8 .

Subsequently, the denture design device applies a predetermined thickness profile to the created relief area (S130). For example, the denture design device applies a thickness profile of a preset value (eg, 0.2 mm) to the relief area. The preset value can be changed by the user.

Applying the thickness profile For example, the denture design device may apply the thickness profile to the relief area in such a way that the largest value, eg, 0.2 mm, converges to 0 at the edge of the relief area at a certain reference point of the relief area. Alternatively, the denture design device may apply a thickness profile to have a uniform thickness throughout the relief area.

The operation of creating a relief area and applying a thickness profile is a relief operation, in order to reduce the stimulation applied by the denture to some localized area of tissue (eg gums, dental tissue) based on the patient's patient data, It is a work that gives a certain space to the denture so that the denture does not come into direct contact with the tissue in the area. The relief area is defined according to the size and shape of the local area.

2 is a diagram illustrating an example of generating an IP relief area using IP according to an embodiment of the present invention.

Referring to FIG. 2 , the denture design device creates an IP relief area 320 using an IP 310 , which is one of the landmarks used for arranging dentures, in the patient's maxillary data 30 . In this case, the denture design device may create an IP relief area 320 by connecting dots spaced apart from each other by a first distance from left to right and from a second distance from top to bottom around the IP 310 . For example, the denture design device may create the IP relief area 320 by connecting dots spaced 4 mm apart from each other left and right and 5 mm apart from the top and bottom around the IP 310 , respectively. When the first distance and the second distance are different, the IP relief area 320 becomes an elliptical shape, and when the same, it becomes a circular shape. The first distance and the second distance are set in advance and can be changed by the user. The IP 310 is a slightly raised portion at the front end of the midline 300 of the roof of the mouth. Since the front and rear lengths of the IP 310 are 5.9 mm on average and up to about 8 mm, the IP relief area 320 has a first distance, The second distance can be set in advance.

3 is a diagram illustrating an example of generating an IP relief area using an MPR area according to an embodiment of the present invention.

Referring to FIG. 3 , the denture design device creates an MPR relief area 420 . To this end, when the denture design device vertically divides the distance to the rearmost 422 of the IP relief area 320 and the posterior palate closure 410 for the maxillary data 30, the posterior palate closure 410 After extracting a point 421 that becomes 　 2/3 in the direction and connecting the rearmost 422 and 2/3 point 421 of the IP relief area 320 to calculate the MPR 　 distance 426, MPR Two points 423 and 424 spaced apart from the center 425 of the distance 426 at a preset distance (eg, 3 mm) in a horizontal width (one side) and two points 421 and 422 above and below the MPR distance 426 It is possible to create an MPR relief region 420 by connecting. As shown in FIG. 3 , the MPR relief region 420 may have an elliptical shape, but the shape is not limited thereto. The length of the horizontal width and the length of the downward extension of the MPR relief region 420 are set in advance and can be changed by the user. In the case of MPR, since the position or shape varies from person to person, the denture design device may set the length of the horizontal width and the downward extension length of the MPR relief region 420 in advance to include most of the MPR. The posterior palate closure 410 is the soft tissue at the border of the soft palate and the hard palate.

4 is a diagram illustrating an example of converting inflection data according to an embodiment of the present invention.

Referring to FIG. 4, the denture design device converts maxillary data 30 into inflection data 50 including inflection information, and then creates a relief area using feature points, for example, inflection points, in the inflection data 50 do. At this time, the inflection information of the inflection data 50 may be visually expressed, for example, through a color map, contrast, or numerical information. Further, inflection points are points at positions where the concave shape changes in the curve, and mean points where the concave shape changes from upward to downward convex or vice versa. The denture design device may change the maxillary data 30 and the inflection data 50 according to user selection and provide them through a screen.

5 and 6 are diagrams illustrating an example of generating a relief area using inflection according to an embodiment of the present invention.

Referring to FIGS. 5 and 6 , the denture design device extracts feature points from around the IP 310 based on the inflection data 50 and creates an IP relief area 612 including the extracted feature points. The feature point may be, for example, an inflection point, a local maximum and minimum point, or a vertex.

For example, the denture design device measures inflection points around the IP 310 and extracts a first measurement area 610 connected to the measured inflection points. Subsequently, the denture design device creates an IP relief area 612 by connecting points spaced apart by a preset distance (eg, 1 mm) from the extracted first measurement area 610 . The IP relief area 612 is elliptical in FIGS. 5 and 6, but the shape is not limited thereto. The preset distance is set in advance and can be changed by the user. At this time, as the denture design device creates an IP relief area 612 that accommodates the surroundings widely by giving a margin of a preset distance (eg, 1 mm) from the first measurement area 610, the relief for the curved part is possible.

The denture design device measures the inflection points corresponding to the convex protruding parts from the rearmost rear to the posterior portion of the inflection data 50, extracts the second measurement area 620 connected to the measured inflection points, and extracts the extracted first 2 MPR relief area that connects points spaced apart by a predetermined distance from the measurement area 620 (for example, 2 mm horizontal width extension on one side to the left and right sides based on the second measurement area, and 5 mm extension downward from the rearmost part) (622) can be created. 5 and 6, the MPR relief region 622 has an elliptical shape, but the shape is not limited thereto. The preset distance is set in advance and can be changed by the user. At this time, as the denture design device creates an MPR relief area 622 that accommodates the surroundings widely by giving a margin of a preset distance from the second measurement area 620, relief for the bent portion is possible.

7 is a diagram illustrating an initial execution of relief according to an embodiment of the present invention.

Referring to FIG. 7 , the denture design device applies a thickness profile of a preset value (eg, 0.2 mm) to the relief area described with reference to FIGS. 2 to 6 . For example, the thickness profile may be applied to the relief area in such a way that the largest value is 0.2 mm at a reference point of the relief area and converges to 0 at the edge of the relief area. The preset value can be changed by the user.

FIG. 7 illustrates an example of applying a thickness profile to the IP relief area 612 and the MPR relief area 622 created with reference to FIGS. 5 and 6 . The MPR relief region 622 has a horizontal width composed of a left point 626 and a right point 628 . A cross-sectional view of the upper model data when viewed from the front by connecting the left point 626 and the right point 628 of the MPR relief region 622 is as shown at reference numeral 70 . At this time, the thickness profile of the MPR relief area 622 has a shape in which the relief center 624 is accumulated by maximally adding a preset thickness on the upper jaw model data.

8 is a diagram illustrating an example of setting the size of a relief area according to an embodiment of the present invention.

Referring to FIG. 8 , the denture design device may modify the size (width, length) of the relief area described with reference to FIGS. 2 to 6 through user settings. For example, as shown in FIG. 8 , the denture design device may modify the upper, lower, left, and right lengths of the IP relief area 320 or 612 by user manipulation, and the MPR relief area 420 or 622 The left, right, top, and bottom lengths of can be modified by user manipulation. Furthermore, the entire area of at least one of the IP relief area 320 or 612 and the MPR relief area 420 or 622 may be enlarged or reduced by user manipulation. To this end, as shown in FIG. 8 , the denture design device displays direction keys on the screen, and the user may modify the size (width, length) of the relief area through an operation of selecting the direction keys. Alternatively, the denture design device displays (+) and (-) keys on at least one of the top, bottom, left, and right of the IP relief area 320 or 612 and the MPR relief area 420 or 622 on the screen, and the user The size (width, length) of the relief area can be modified by selecting the (+) or (-) key.

9 is a view showing the configuration of a denture design device according to an embodiment of the present invention.

Referring to FIG. 9 , the denture design device 1 is an electronic device capable of executing an image processing program. Electronic devices include personal computers (PCs), laptops, tablets, smart phones, mobile phones, and the like. Medical image processing programs include design programs, scan programs, CAD programs, and the like. Such a medical image processing program may be a denture design program for manufacturing patient's dentures, but may be applied to other general medical image processing programs. Hereinafter, for convenience of explanation, a denture design program will be described as an example, but the same can be applied to other programs as long as image processing is possible.

Denture design device 1 according to an embodiment includes a data acquisition unit 10, a storage unit 12, a control unit 14, an input unit 16, and an output unit 18.

The data acquisition unit 10 acquires patient data from teeth including damaged teeth of the patient. The patient data may include, for example, patient scan data, and the scan data may be classified into upper jaw data and lower jaw data.

The storage unit 12 stores data such as information necessary for the execution of an operation of the denture design device and information generated according to the execution of the operation. For example, patient data of an individual patient is stored in the storage unit 12 and may be provided to the control unit 14 .

The control unit 14 designs the patient's dentures through control by a computer program. The controller 14 according to an embodiment creates a relief area for denture design and applies a predetermined thickness profile to the created relief area.

The control unit 14 may create a relief area according to a preset criterion or may create a relief area by extracting an inflection point of data. The former is referred to as a 'first generation method', and the latter is referred to as a 'second generation method'.

According to the 'first generation method', the controller 14 can create an IP relief area using the landmark IP 310 . An example of creating an IP relief area according to the 'first generation method' is as described above with reference to FIG. 2 . In addition, the control unit 14 may create an MPR relief area using the landmark IP and the posterior palate closure.

Furthermore, the controller 14 may additionally create a cleft palate relief area including cleft palate in addition to the IP relief area centered on the IP or the MPR relief area centered on the MPR.

According to the 'second generation method', the control unit 14 converts upper jaw data, which is patient data, into inflection data including inflection information, extracts feature points from the converted inflection data, and then generates a relief area including the extracted feature points. do. For example, the control unit 14 measures inflection points around the IP centered on the inflection data and creates an IP relief area including the measured inflection points.

As another example, the control unit 14 measures inflection points from the rear of the IP relief region of the inflection data toward the rear, and generates an MPR relief region including the measured inflection points.

The controller 14 applies a predetermined thickness profile to the relief area created by the 'first generation method' or the 'second generation method'. For example, the controller 14 applies a thickness profile of a preset value (eg, 0.2 mm) to the relief area. The preset value can be changed by the user.

The input unit 16 receives a user manipulation signal. For example, the input unit 16 may receive a user manipulation signal for correction from the user for the relief area created by the control unit 14 . The controller 14 may modify the relief area according to a user manipulation signal, and the output unit 18 may output the modified relief area. For example, the size (width, length) of the relief area can be modified.

When the controller 14 displays a screen for selecting the 'first generation method' or the 'second generation method' through the output unit 18, the input unit 16 inputs a user manipulation signal for selecting a predetermined method. can receive

The output unit 18 displays the relief area created through the control unit 14 as a virtual graphic object on the screen and displays a screen for executing the relief. The output unit 18 may display a graphic interface for user modification of the relief area on the screen. An embodiment for this is as described above with reference to FIG. 8 .

So far, the present invention has been looked at mainly by its embodiments. Those skilled in the art to which the present invention pertains will be able to understand that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from a descriptive point of view rather than a limiting point of view. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope will be construed as being included in the present invention.

Claims (11)

In the method for generating a relief area using a denture design device, the denture design device
obtaining patient data;
generating a relief area including at least one of an incisal papilla and a midpalatal suture from the obtained patient data; and
applying a predetermined thickness profile to the created relief area;
Relief area creation method comprising a. 2. The method of claim 1, wherein creating a relief area comprises:
Extracting a landmark for an incisive papilla (IP: Incisive Papilla) from maxillary data, which is patient data; and
generating an IP relief area including landmarks related to the incisal nipple;
Relief area creation method comprising a. 2. The method of claim 1, wherein creating a relief area comprises:
extracting landmarks related to incisal papillae and posterior palate closure from maxillary data, which is patient data;
extracting a Median Palatine Raphae (MPR) from maxillary data using landmarks related to the incisor papilla and posterior palatal closure; and
creating an MPR relief region comprising the mid-palatal suture;
Relief area creation method comprising a. 4. The method of claim 3, wherein the step of creating an MPR relief region comprising the mid-palatal suture
extracting a point that is 2/3 in the posterior palatal closure direction when the distance to the posterior end of the IP relief area and the posterior palatal closure is vertically divided into 3 parts for the maxillary data;
calculating an MPR distance by connecting the rearmost point of the IP relief area and the 2/3 points; and
generating an MPR relief area by connecting two points spaced apart from the center of the MPR distance by a predetermined horizontal width and two points above and below the MPR distance;
Relief area creation method comprising a. The method of claim 1 , wherein the step of creating the relief area
converting upper jaw data of the patient into inflection data including inflection information;
extracting feature points from the transformed inflection data; and
generating a relief area including the extracted feature points;
Relief area creation method comprising a. According to claim 5,
The feature point is at least one of an inflection point, a local maximum point, a local minimum point, and a vertex. 6. The method of claim 5, wherein generating a relief area including the extracted feature points
measuring feature points around the incisor papilla in the inflection data and extracting a first measurement area connected to the measured feature points; and
generating an IP relief area by connecting points separated by a preset distance from the extracted first measurement area;
Relief area creation method comprising a. 6. The method of claim 5, wherein generating a relief area including the extracted points of inflection
extracting a second measurement region connected to the measured feature points by measuring feature points from the rear end of the incisor papilla of the inflection data toward the posterior portion; and
generating an MPR relief area connecting points spaced apart by a preset distance from the extracted second measurement area;
Relief area creation method comprising a. 2. The method of claim 1, wherein the relief area creation method
generating a cleft palate relief area including cleft palate;
Relief area creation method characterized in that it further comprises. 2. The method of claim 1, wherein the relief area creation method
displaying a user graphic interface for modifying the created relief area on a screen; and
modifying a relief area by user manipulation through the user graphic interface;
Relief area creation method characterized in that it further comprises. a data obtaining unit acquiring patient data;
a control unit generating a relief area including at least one of an incisal papilla and a midpalatal suture from the obtained patient data, and applying a predetermined thickness profile to the created relief area; and
an output unit displaying patient data including the relief area;
Denture design device comprising a.

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