KR102376710B1 - Method and apparatus for auto forming of border of full denture - Google Patents

Abstract

A method of automatically forming the margin of an edentulous complete denture is provided. A method for automatically forming a margin according to an embodiment of the present invention includes the steps of obtaining 3D scan data of the maxilla, and connecting inflection points outside the alveolar ridge on a positive maxillary 3D model according to the 3D scan data. , automatically forming the remaining margins except for the posterior border, and identifying a left hamular notch and a right pterygoid maxillary notch based on the height of the maxillary 3D model; Using the images obtained by dividing the 3D model into the front plane, the point where the mid-palatal elevation ends is identified, and the frontal split image is analyzed while moving backward from the point where the mid-palatal elevation ends, and the specified width and The step of identifying two Palatine Fovea recessed below the depth, and the posterior margin based on the reference line connecting the left pterygoid maxilla, the right pterygoid maxillary notch and the two palatine foveas. auto-forming.

Description

Automated marginal formation method and device for full denture {METHOD AND APPARATUS FOR AUTO FORMING OF BORDER OF FULL DENTURE}

The present invention relates to a method and apparatus for automatically forming a margin of a full denture. More particularly, it relates to a method and apparatus for digitally manufacturing a complete denture optimized for a patient by automatically forming the margins of a full denture using 3D scan data obtained for generating a full denture using software.

A full denture is a type of removable prosthesis that replaces the lost teeth and surrounding tissues when all natural teeth of the maxilla or mandible are lost. Unlike local dentures, because they function in the mouth only with the help of alveolar dentures, holding power (power not to fall out in the mouth), support power (the strength of the tissues in the mouth to support the total denture), stability (the degree to which the total denture does not shake when chewing or speaking) ) are all insufficient.

Skilled technology is required to manufacture a complete denture optimized for the patient's alveolar ridge and oral environment, and manufacturing a complete denture is a prosthetic treatment operation that requires significant cost and time. In the production of such complete dentures, it will be possible to increase the accuracy of the production of complete dentures by expanding the introduction of IT technology, and to reduce the burden of cost and time required for production.

US Patent Publication No. 2010-0332253

The technical problem to be solved by the present invention is to provide a method and an apparatus for automatically forming an optimal full denture margin using scan data of the maxilla or mandible of a patient.

Another technical problem to be solved by the present invention is to provide a method and an apparatus for forming a full denture margin optimized for the maxillary or mandibular shape of a patient by minimizing the number of device manipulations by a user.

Another technical problem to be solved by the present invention is to provide a method and an apparatus comprising providing a user interface capable of simply manually adjusting the automatically formed full denture margin.

Another technical problem to be solved by the present invention is to provide a method and an apparatus for forming a full denture margin optimized for the shape of a patient's palate.

Another technical problem to be solved by the present invention is to provide a method and an apparatus for forming a full denture margin having a thickness optimized for the shape of the labial space of the alveolar ridge.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

A method for automatically forming a margin according to an embodiment of the present invention for solving the above technical problem includes the steps of obtaining 3D scan data of the maxilla; ridge) automatically forming the remaining margins except for the posterior border by connecting the outer inflection points; Identifying the step of identifying, and using the images obtained by dividing the maxillary three-dimensional model into the front plane (Frontal plane) to identify the point where the mid-palatal elevation ends, and moving backward from the point where the mid-palatal elevation ends, the frontal split image by analyzing the two palatine fovea dented below the specified width and depth, and connecting the left pterygoid maxilla, the right pterygoid maxillary notch, and the two palatine foveas. and automatically forming the posterior margin based on the baseline.

In one embodiment, the scan target of the scan data is a positive model of the impression body of the upper jaw, and the model has a margin of 4 mm or more in the horizontal direction and 2 mm or more in the vertical direction from the alveolar outer inflection point formed on the impression body. It may have been created with

In one embodiment, the scan target of the scan data is the impression body of the maxilla,

The obtaining of the three-dimensional scan data of the upper jaw includes generating the positive three-dimensional model of the upper jaw by using the three-dimensional model of the impression body of the sound type according to the scan data, It may include generating the maxillary 3D model with a margin of 4 mm in the horizontal direction and 2 mm in the vertical direction from the inflection points.

In an embodiment, the automatically forming the posterior margin may include: analyzing a shape of the maxillary three-dimensional model to determine a palatine shape; and adjusting the reference line using the determined palatal shape. and, setting the adjusted baseline as the posterior margin. At this time, the step of determining the shape of the palate is, in the sagittal plane division plane of the maxillary 3D model, dividing the incisal papilla and the reference line into quarters, 1/4 point, 2 Based on the first angle formed by the /4 point and the 3/4 point, selecting one of the sagittal shape from among a Mildly Inclined type, a Steep type and a Flat type, and the In the frontal plane dividing plane of the maxillary 3D model, based on the point divided by 1/2 between the mid-palatal suture and the peaks of both alveolar ridges and the second angle formed by the mid-palatal suture, the V-shape , O-shape and U-shape may include selecting one of the front surface shape.

In some embodiments, the selecting of the sagittal shape includes selecting the steeply inclined type when the first angle is less than 145 degrees, and selecting the steeply inclined type when the first angle is greater than or equal to 145 degrees and less than 170 degrees, when the first angle is less than 170 degrees. and selecting the flat shape when the first angle is 170 degrees or more.

In some embodiments, the selecting of the frontal surface shape includes the U when the second angle at the 2/4 point is 160 degrees or more and the second angle at the 3/4 point is 150 degrees or more -Select a shape, and select the O-Shape if the second angle at the 2/4 point is more than 130 degrees and less than 160 degrees and the second angle at the 3/4 point is more than 140 degrees and less than 150 degrees and selecting the V-Shape when the second angle at the 2/4 point is 130 degrees or less and the second angle at the 3/4 point is 140 degrees or less.

In some embodiments, the adjusting of the reference line may include moving the reference line 2 mm forward from the palatine when the sagittal shape is selected as the steeply inclined shape and the frontal shape is selected as the V-Shape. It may include a step of moving.

In some embodiments, the adjusting of the reference line may include moving the reference line 2 mm posteriorly to the palate when the sagittal shape is selected as the flat shape and the frontal shape is selected as the U-Shape. It may include a step of moving.

In one embodiment, the step of automatically forming the remaining margins except for the posterior border comprises the steps of identifying a frenum and a narrow follicle adjacent to the alveolar ridge; It may include the steps of automatically forming the margin by placing, and automatically forming the margin by leaving a margin of 2 mm with respect to the narrow platoon.

In an embodiment, the automatically forming the remaining edges except for the rear edge may include generating thickness information of the edge. In this case, the thickness information may be determined using a distance between an outer inflection point of the alveolar ridge and an outermost point of the maxillary three-dimensional model of the positive shape. In this case, the generating of the thickness information of the margin may include setting the labial outline of the margin to have the same shape as the outline between the outer inflection point of the alveolar ridge and the inflection point of the labial alveolar ridge.

In an embodiment, the method for automatically forming the margin may further include, after the automatically forming the posterior margin, further displaying a user interface for manually adjusting the automatically formed margin. In this case, the user interface for manually adjusting the automatically formed margin includes a first user interface for moving the frontal reference line forward or backward, and a second user for moving the outer inflection point of the alveolar ridge in the reference line. It may include an interface and a third user interface for moving the outermost point of the maxillary 3D model in the reference line. In an embodiment, the user interface is displayed together with an image in which the maxillary 3D model is viewed from the bottom up, and height information of the maxillary 3D model at the baseline is overlaid on the image. It may include a height information indicator that is displayed. In this case, the second user interface and the third user interface may be to move the outer inflection point or the outermost point of the alveolar ridge in any one direction on the labial or lingual side on the height information indicator.

The automatic margin formation method according to another embodiment of the present invention for solving the above technical problem includes the steps of obtaining three-dimensional scan data of the mandible, and from the pure and buccal ridges identified in the three-dimensional scan data Creating a 3D mandible model by forming a 3D model higher in the vertical direction by more than a preset value and wider in the horizontal direction by more than a preset value than the inflection point that occurs when passing the oral vestibule; The steps of automatically forming the remaining edges except for the posterior border by connecting them, and the left and right posterior molar triangles on the 3D mandible model using the position of the inflection point identified by the area formed higher than the preset value in the vertical direction ( It may include the step of identifying the position of the Retromolar Pad) and determining the line connecting the left and right posterior molar triangles as the posterior margin.

A denture design device according to another embodiment of the present invention for solving the above technical problem, a network interface for receiving three-dimensional scan data of the maxilla, a memory loaded with an edentulous complete denture design program, and a program loaded into the memory It may include a processor that executes the At this time, the edentulous full denture design program is an instruction for automatically forming the remaining margins except for the posterior margin by connecting the inflection points outside the alveolar ridge on the maxillary 3D model of the positive shape according to the 3D scan data. (instruction), an instruction for identifying a left hamular notch and a right pterygoid maxillary notch based on the height of the maxillary 3D model, and dividing the maxillary 3D model into a front plane Using the images obtained from Fovea) and an instruction for automatically forming the posterior margin based on a reference line connecting the left pterygoid maxilla, the right pterygoid maxillary notch, and the two palates.

1 is a block diagram of a digital denture manufacturing system according to an embodiment of the present invention.
2 is a diagram to help understanding some embodiments of the present invention.
3 is a flowchart of a digital denture manufacturing method according to another embodiment of the present invention.
4 is a view for explaining a scan target of 3D scan data obtained in the process of performing some embodiments of the present invention.
5 is a flowchart of a method for automatically forming a denture border according to another embodiment of the present invention.
6 is a view for explaining a process of generating a 3D model referenced in the process of performing some embodiments of the present invention.
7 is a view showing the results of automatic formation of the margins of the maxillary edentulous full denture according to the method described with reference to FIG. 5 .
8 is a view for explaining a process of determining the shape of the sagittal plane of the palate referred to in some embodiments of the present invention.
9 is a view for explaining a process of determining the shape of the anterior surface of the palate referred to in some embodiments of the present invention.
10A to 10B are diagrams for explaining that the sagittal shape and the frontal shape of the palate are reflected in the automatic formation of the margin of the full denture according to the method described with reference to FIG. 5 .
11 is a view for explaining a criterion for automatically forming the posterior margin of the mandible according to the method described with reference to FIG. 5 .
12 to 14 are diagrams for explaining that the edentulous denture margin is automatically formed by reflecting the shape of the frenum according to the method described with reference to FIG. 5 .
15 to 16 are views for explaining a process in which data on the thickness of the margin of the denture is generated according to the method described with reference to FIG. 5 .
17 is a view for explaining that the limb is manually adjusted through a UI (User Interface) for manually adjusting the automatically formed denture limb according to the method described with reference to FIG.
Figure 18 shows a screen on which the final completed denture margin according to the method described with reference to Figure 5 is displayed.
19 is a diagram for explaining Postdam in order to help understanding of some embodiments of the present invention.
20 is a flowchart of a method for automatically forming a Postdam according to another embodiment of the present invention.
FIG. 21 is a view for explaining a process in which a forward limit position of a Postdam is identified according to the method described with reference to FIG. 20 .
22 is a view for explaining a process of identifying a lateral limit position of a Postdam according to the method described with reference to FIG. 20 .
23 to 26 are views for explaining a process of automatically forming a postdam with a position and shape according to the shape of the palate among the methods described with reference to FIG. 20 .
27 is a flowchart of a Postdam manual adjustment method according to another embodiment of the present invention.
FIG. 28 shows exemplary six reference point movement UIs displayed on the screen according to the execution of FIG. 27 .
29 is a view for explaining that the shape of the postdam is adjusted using the reference point movement UI of FIG. 28 .
FIG. 30 further illustrates exemplary four indicator UIs displayed on the screen according to the execution of FIG. 27 .
FIG. 31 is a view for explaining that the shape of a Postdam is adjusted using the indicator UI shown in FIG. 30 .
FIG. 32 is a diagram for explaining that the Postdam shape reflected on the 3D model is processed as a curved surface through round processing even when the depth is adjusted using the indicator UI shown in FIG. 30 .
33 is a hardware configuration diagram of a computing device in which a method according to some embodiments of the present invention may be implemented.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and a method for achieving them will become apparent 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 published below, but may be implemented in various different forms, and only these embodiments allow the publication of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular. The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. Hereinafter, some embodiments of the present invention will be described with reference to the drawings.

The configuration and operation of a digital denture manufacturing system according to an embodiment of the present invention will be described with reference to FIG. 1 . The digital denture manufacturing system according to this embodiment includes a digital denture design device 100 as shown in FIG. 1 , and in some embodiments, at least one of the 3D scanner 10 and the full denture manufacturing device 20 is further added may include The digital denture design device 100 may be a computing device.

The digital denture design apparatus 100 receives the scan data of the impression body of the edentulous patient directly from the 3D scanner 10 or through a network. The digital denture design apparatus 100 may generate a 3D model indicating a positive model by using the scan data of the impression body. The generated 3D model may be a 3D model of the maxilla of an edentulous patient (when the impression is obtained from the upper jaw) or a mandible model (when the impression is obtained from the mandible). Also, the digital denture design apparatus 100 may receive scan data of the maxillary model or the mandibular model of the edentulous patient directly from the 3D scanner 10 or may receive it through a network. That is, the digital denture design apparatus 100 may receive the 3D model of the maxilla or the model of the mandible from the 3D scanner 10 .

Digital denture design device 100 is provided with the maxillary three-dimensional model, generates data for manufacturing a maxillary full denture that is accurately fitted to the maxillary three-dimensional model, and transmits the generated production data directly to the total denture manufacturing device 20 Or, it can be transmitted through a network. The complete denture manufacturing apparatus 20 is a computer aided manufacturing (CAM)-based manufacturing apparatus, and may be, for example, a 3D printer. Of course, when the digital denture design apparatus 100 receives the mandibular model, it generates manufacturing data for manufacturing the mandibular full denture.

For better understanding, the full denture will be described with reference to FIG. 2 . A full denture is a removable dental prosthesis that replaces the anterior teeth of the maxilla or mandible and related structures. By installing full dentures, effects such as mastication of food, restoration of aesthetic function, and restoration of pronunciation can be obtained. However, since stability and maintenance must be obtained from the edentulous jaw in which all remaining teeth are missing, it is a prosthesis in a very unfavorable condition compared to other prostheses.

In Fig. 2, A denotes an artificial tooth, B denotes a denture base, C denotes a mucosal surface, D denotes a polished surface, and E denotes a margin. An artificial tooth is attached to the denture base, and the labial side of the denture base is the margin marked with E that fits into the space between the alveolar ridge and the lips. If the margins are not correct, air will be drawn through the margins, which is one factor that causes the dentures to fall out easily. That is, it is important to prevent frequent drop-out of the full denture for the margin to be formed to accurately reflect the shape of the mouth of the edentulous patient. In particular, since the full denture of the maxilla is more likely to fall out due to the effect of gravity, it is more important that the margin is accurately formed.

Postdam is important for correct formation of margins and prevention of dislodging of maxillary full dentures. Postdam is formed on the mucosal surface of the maxillary common denture and is called retropalatal occlusion. The Postdam, by applying pressure within the physiological limits to the soft tissue between the soft palate and the soft palate, helps to improve denture retention by maintaining a complete occlusion between the maxillary full denture and the palatal surface. In addition, the Postdam can, incidentally, prevent food residues from entering under the denture and reduce vomiting.

As described above, the possibility of the maxillary common denture falling out due to the effect of gravity is higher than that of the mandibular denture. To prevent this, the margin of the maxillary common denture must be accurately formed. It must be formed in an appropriate form. Hereinafter, for the convenience of understanding, the manufacturing of the maxillary full denture will be mainly described. However, it goes without saying that at least a part of the description related to the maxillary complete denture can be applied to the method of manufacturing the mandibular complete denture unless there is a special reason.

The digital denture design apparatus 100 calculates the exact position and shape of the margin and Postdam of the maxillary full denture by performing software logic. The digital denture design apparatus 100 analyzes the maxillary 3D model, and automatically forms a border of the maxillary full denture suitable for the maxillary 3D model. Digital denture design device 100 may provide a GUI (Graphic User Interface) for manually adjusting the position with respect to the automatically formed margin.

In addition, the digital denture design apparatus 100 automatically reflects the Postdam on the 3D model of the maxillary full denture based on the positions of at least some of the automatically formed margins. In order to form a postdam on the denture in the conventional maxillary full denture manufacturing process, the postdam shape on the maxillary model had to be manually formed using a dental sculpt, etc. Even if performed, by forming a Postdam shape on the 3D model, a denture base of the maxillary full denture in which the Postdam is formed can be manufactured.

In addition, the digital denture design apparatus 100 may provide a GUI for manually adjusting the position and shape of the automatically formed Postdam.

In other words, the digital denture design device 100 recommends the limbic and Postdam generated in an automated manner using the maxillary 3D model generated using the scan data provided from the 3D scanner 10 to save the user's time. At the same time, by providing a manual adjustment GUI for fine adjustment according to the user's experience for the purpose of adjusting the margins and adjusting the Postdam, respectively, the manufactured full denture base is accurately suited to the edentulous patient.

The configuration and operation of the digital denture design device 100 may be understood in more detail through embodiments to be described later.

Hereinafter, with reference to FIG. 3, a digital denture manufacturing method according to another embodiment of the present invention will be described. The digital denture manufacturing method according to the present embodiment may be performed by a computing device. All operations constituting the digital denture manufacturing method according to the present embodiment may be performed by one computing device or may be performed by a plurality of computing devices. The computing device may be, for example, a personal terminal such as a desktop, a notebook computer, or a tablet. For example, the computing device may be the digital denture design device described with reference to FIG. 1 . In the description of the method according to the present embodiment, when a subject performing each operation is omitted, it may be understood that the subject performing each operation is the computing device.

In step S100, scan data is obtained. The scan data may be data as a result of a three-dimensional scan of the maxillary impression of an edentulous patient, or data as a result of a three-dimensional scan of a model of the maxilla of an edentulous patient. Next, in step S200, a boundary line to be the margin of the denture is automatically generated on the maxillary 3D model generated from the scan data. 4 shows a result of automatically forming the margin 30a on the maxillary model 30 of an edentulous patient and a result of automatically forming the margin 31a on the maxillary impression 31 of an edentulous patient.

The margins 30a and 31a shown in FIG. 4 are the margins of the remaining portions except for the rear margins. The margins of the rest except for the posterior margin can be obtained by connecting the inflection points that occur when passing the oral vestibule from the labial and buccal ridges. The inflection point may be obtained by comparing the heights in the 3D model. The posterior margin can be obtained using a line connecting the hamular notch and the palatine fossa. A method of automatically forming a margin will be described later with reference to FIG. 5 and the like.

In step S300, a postdam is automatically formed on the maxillary 3D model using the shape of the posterior margin of the denture and the palate. A method of automatically forming a postdam will be described later with reference to FIG. 20 and the like.

In step S400, manual adjustment for the automatically formed Postdam is performed. For the manual adjustment, a GUI specialized for the function and shape of Postdam may be provided. The manual adjustment method of the Postdam will be described later with reference to FIG. 27 and the like.

In step S500, data for manufacturing a full denture having an automatically formed margin and a postdam that has been automatically formed and then manually adjusted is generated by the CAM method, and the generated data is output to a manufacturing apparatus.

Hereinafter, a method for automatically forming a margin according to another embodiment of the present invention will be described with reference to FIG. 5 . The automatic margin formation method according to the present embodiment may also be performed by the computing device. All operations constituting the method for automatically forming a margin according to the present embodiment may be performed by one computing device or may be performed by a plurality of computing devices. The computing device may be, for example, a personal terminal such as a desktop, a notebook computer, or a tablet. For example, the computing device may be the digital denture design device described with reference to FIG. 1 . In the description of the method according to the present embodiment, when a subject performing each operation is omitted, it may be understood that the subject performing each operation is the computing device. The method according to the present embodiment may be understood to correspond to step S200 included in the method described with reference to FIG. 3 .

In step S210, the margins of the rest except for the posterior margin may be obtained by connecting the inflection points generated when passing the oral vestibule from the labial and buccal ridges. The inflection point may be obtained by comparing the heights in the 3D model. For example, in the model 30 of the maxillary model of Fig. 4, by obtaining a line 30a connecting the deepest point that occurs when passing the oral vestibule from the labial and buccal alveolar ridges, the margins of the rest except for the posterior margin This can be obtained, and in the model 31 of the impression body of the maxilla of Fig. 4, by obtaining a line 31a connecting the highest protruding inflection point that occurs when passing the oral vestibule from the labial and buccal ridges, the posterior margin is obtained. The margins of the remaining part except for can be obtained.

What is obtained by connecting the inflection points that occur when the margins of the rest except for the posterior margin pass from the labial and buccal ridges to the oral vestibule are the same when automatically forming the margins of the maxilla as well as the margins of the mandible. You will be able to clearly understand what applies.

On the other hand, if the scan data is a scan of the maxillary impression, as shown in FIG. 6 , based on the connection line 31a of the labial inflection point of the alveolar, 4 mm of allowance in the horizontal direction and 2 mm of allowance in the vertical direction are placed respectively. A positive 3D maxillary three-dimensional model 30a is obtained, and the margin of the edentulous full denture may be automatically formed using the positive 3D maxillary three-dimensional model 30a. In some embodiments, the positive 3D maxillary three-dimensional model 30a may be obtained with an allowance of 4 mm or more in the horizontal direction and an allowance of 2 mm or more in the vertical direction, respectively.

In step S230, the posterior margin is automatically formed using the positions of the left and right pterygoid maxillary notch marks, which are the reference points for the posterior margin. Since the posterior margin of the maxillary common denture is in contact with the soft palate, if it is formed too posteriorly, a foreign body sensation may appear and cause nausea. Conversely, if the posterior margin is formed too anteriorly, a problem occurs in maintaining stability of the maxillary full denture. Therefore, in order to increase the holding power of the maxillary full denture, there is a need for a software-based logic that can be extended backward as much as possible within the limit that a foreign body does not appear. In this regard, it will be described with reference to FIGS. 7 to 10B.

7, the posterior margin according to some embodiments is a left pterygoid maxillary notch (35a), a right pterygoid maxillary notch (35b), and two palatine fovea (36a, 36b). It may be a connecting line 37 . The left pterygoid maxillary notch (35a) and right pterygoid maxillary notch (35b) are two positions where the margin except for the posterior margin ends at the rear. can be In addition, along the sagittal plane (32) where the incisal papilla (38) is located, the frontal surface (33) is moved to the rear (34) and the frontal split image is analyzed and dented below the specified width and depth. Two palates (36a, 36b) can be identified.

In some embodiments, when the mid-palatal elevation (not shown) is identified in the sagittal plane 32 where the incisal papilla 38 is located, the anterior surface 33 moves backward 34 from the point where the mid-palatal elevation ends. By analyzing the two-sided segmented image, the two palates and (36a, 36b) dented below the specified width and depth may be identified. In this case, compared to moving backward from the position of the incisal nipple 38, the effect of being able to identify the position with the palatine more quickly is obtained.

In some embodiments, the shape of the palate may be determined by analyzing the shape of the maxillary three-dimensional model, and the posterior margin may be adjusted using the determined shape of the palate. Since the mucosal surface of the maxillary common denture and the palatine part of the maxilla are in contact with each other, regardless of the shape of the palate, the left pterygoid maxillary notch (35a), the right maxillary notch (35b) and the two palatine fovea ( Determining the line 37 connecting 36a and 36b as the posterior margin is because the holding force of the maxillary full denture may be weakened. Hereinafter, it will be described with reference to FIGS. 8 to 10B.

8 is a view for explaining a criterion for classifying the shape of the palate in the sagittal plane. As shown in Figure 8, by dividing the maxillary three-dimensional model 30 from the incisor papilla 38 to the palatine and palate (36a, 36b) into quarters, 1/4 point (39a), 2/4 point (39b) ) and the first angle formed by the 3/4 point 39c is less than 145 degrees, the palate shape is divided into a steep type, and when the first angle is 145 degrees or more and less than 170 degrees, the palate part The shape is classified as a Mildly Inclined type, and when the first angle is 170 degrees or more, the shape of the palate is divided into a flat type.

9 is a view for explaining a criterion for classifying the shape of the palate in the frontal plane. As shown in FIG. 9, the second formed by the mid-palatal suture 42 and the mid-palatal suture 42 and the mid-palatal suture 42 at the points 43a and 43b divided by half between the alveolar peaks 41a, 41b. Based on the angle, when the second angle at the 2/4 point 39b of the sagittal plane is 160 degrees or more, and the second angle at the 3/4 point 39c of the sagittal plane is 150 degrees or more, the The palatine shape is divided into a U-shape 44a, the second angle at 2/4 point 39b of the sagittal plane is greater than 130 degrees and less than 160 degrees, and at 3/4 point 39c of the sagittal plane When the second angle of is greater than 140 degrees and less than 150 degrees, the palate shape is divided into an O-shape 44b, and the second angle at 2/4 point 39b of the sagittal plane is 130 degrees or less, and , when the second angle at the 3/4 point 39c of the sagittal plane is 140 degrees or less, the palate shape may be divided into a V-shape 44c.

If the shape of the palate is a steep slope type and a V-shape, it means that the palatine slope is severe. In this case, the vibration of the vibrating line is severe. Therefore, taking this into consideration, the posterior margin is 2 mm anterior than the line 37 connecting the left pterygoid maxillary notch (35a), the right pterygoid maxillary notch (35b) and the two palatine fovea (36a, 36b). It can be adjusted by line 37a of (37a-1).

If the shape of the palate is inclined and O-shape, it means that the palatal inclination is at an average level. In this case, the posterior margin may not be adjusted at the line 37 connecting the left pterygoid maxillary notch 35a and the right pterygoid maxillary notch 35b and the two palatine fovea 36a, 36b. .

If the shape of the palate is a flat shape and a U-shape, it means that the palatal inclination is gentle. In this case, the posterior margin is 2 mm posterior to the line 37 connecting the left pterygoid maxillary notch (35a), the right pterygoid maxillary notch (35b) and the two palatine fovea (36a, 36b) 2 mm posterior (37a- It can be adjusted by the line 37b of 2).

Returning to FIG. 5 again, description will be made. A method of automatically forming the margin of the maxillary full denture has been described with reference to steps S220 and S230. Next, the posterior margin not generated in step S210 among the margins of the full denture of the mandible is generated in step S240. A method of generating the posterior margin of the mandible will be described with reference to FIG. 11 .

In the rear of the maxillary model, left and right pterygoid maxilla are identified to identify the generation standard of the maxillary posterior margin, whereas inflection points are not formed behind the impression of the lower jaw. It is difficult to identify a reference point for automatically forming the posterior margin of the mandible.

Thus, in some embodiments, when generating a 3D mandible model, a vertical direction by 2 mm or more, a horizontal direction by 4 mm or more above the inflection point that occurs when passing the oral vestibule from the labial, buccal ridge of the impression. By creating a wider 3D model as a posterior margin of the mandible, the inflection point as a reference point for automatically forming the posterior margin of the mandible can be identified by software.

Shown in FIG. 11 is an exemplary 3D mandible model. The right direction in FIG. 11 is the posterior direction of the mandible, and FIG. 11 shows a 3D mandible model in which a barrier as high as 2 mm is formed at the position of the rear end of the impression body. The barrier is artificially formed on the 3D model to form an inflection point, which will be described later. By forming the barrier, the inflection point between the barrier and the rear end of the impression body can be identified by software. For example, when the height of the 3D mandible model decreases from the front to the rear and increases at a certain point, the point may be identified as the inflection point.

Using the identification result of the inflection point, the position of the retromolar pad located at the left and right ends of the mandible can be identified. And, the posterior margin of the mandible may be determined by a line connecting the positions of the identified left and right posterior molar triangles.

In step S250, the frenum may be automatically reflected in automatically forming the margin of the maxillary full denture. Since the platoon is a tissue that moves when the patient speaks or moves his lips, the denture may fall off if the margin is formed to cover the platoon. Therefore, it is preferable that the margin is formed so as not to cover the platoon portion. 12 shows that the margin is formed with a margin as the forward platoon is positioned (48a), and that the margin is formed with a margin as the narrow platoon is positioned (48b) are shown. For this purpose, the frenum and narrow follicle adjacent to the alveolar ridge are identified, the margin is automatically formed by leaving a margin of 1 mm with respect to the labrum (refer to FIG. 13), The margin may be automatically formed (see FIG. 14 ). The reason that the narrow platoon has more room than the tongue platoon is because the narrow platoon has a wider range of motion than the tongue platoon.

In step S260, thickness information of the marginal portion is generated. This will be described with reference to FIGS. 15 to 16 . The first inflection point 49a, the second inflection point 49b, and the third inflection point 49c formed on the labial direction at the top of the alveolar ridge of the maxillary three-dimensional model are described with reference. The first inflection point 49a indicates the deepest point that occurs when passing the oral vestibule from the labial and buccal ridges. In addition, when the outer surface of the maxillary 3D model is moved between the lips in the labial alveolar ridge, the deep one becomes shallower based on the first inflection point 49a. The second inflection point 49b is the outermost point of the maxillary three-dimensional model. The third inflection point 49c is an inflection point at which the curved direction of the outer surface of the maxillary three-dimensional model on the labial ridge changes.

The thickness 53 of the margin is determined using the distance between the first inflection point 49a and the second inflection point 49b. In addition, the distal end outline of the margin may be formed to be the same as the outer surface of the maxillary 3D model between the first inflection point 49a and the second inflection point 49b. Also, the edge of the edge may be formed to be the same as the outer surface of the maxillary 3D model between the first inflection point 49a and the third inflection point 49c.

In some embodiments, as shown in FIG. 16 , the thickness 53 - 1 of the denture base portion other than the marginal portion may be set to 2 mm to 2.5 mm. At this time, from the point 49c-1 corresponding to the third inflection point 49c on the edge of the edge on the edge of the edge on the edge of the edge, the edge on the edge of the edge is formed with a denture base having a thickness of 2mm to 2.5mm (50b-1). can be formed.

The reason why the thickness 53-1 of the denture base portion, not the marginal portion, is within a certain range rather than a specific value is to respond to a difference in thickness required according to CAM software.

In step S270, the automatically completed margin and its thickness are adjusted through the marginal manual adjustment UI. In this regard, it will be described with reference to FIG. 17 . 17, the marginal manual adjustment UI moves the first user interface for moving the frontal reference line forward or backward, and the first inflection point 49a, which is the outer inflection point of the alveolar in the reference line. and a third user interface for moving a second inflection point 49b that is an outermost point of the maxillary 3D model in the reference line.

A height line on the front surface along the reference line is shown as shown in FIG. 17 , and the first inflection point 49a and the second inflection point 49b may be moved left or right above the height line. If the first inflection point 49a is moved to the left or right through the second user interface, the automatically formed edge and the thickness of the edge will be adjusted, and the second inflection point 49b is moved through the third user interface In this case, the margin itself will not be changed, only the thickness of the margin will be adjusted. For example, the figure below of FIG. 17 shows the first inflection point 49a - 1 moved to the right through the second user interface. By this user input, the left rear margin will move to the palatal side, and the left rear margin will be adjusted to thicken its thickness.

18 illustrates that a screen in which the maxillary full denture region finally completed through the process described so far is overlaid on the maxillary 3D model is provided to the user.

Next, a method for automatically forming a Postdam according to another embodiment of the present invention will be described with reference to FIG. 20 . The automatic Postdam formation method according to the present embodiment may also be performed by the computing device. All operations constituting the automatic Postdam formation method according to the present embodiment may be performed by one computing device or may be performed by a plurality of computing devices. The computing device may be, for example, a personal terminal such as a desktop, a notebook computer, or a tablet. For example, the computing device may be the digital denture design device described with reference to FIG. 1 . In the description of the method according to the present embodiment, when a subject performing each operation is omitted, it may be understood that the subject performing each operation is the computing device. The method according to the present embodiment may be understood to correspond to step S300 included in the method described with reference to FIG. 3 .

As described above, the postdam formed on the posterior mucosal surface of the maxillary common denture increases the holding force of the maxillary common denture by maintaining a complete occlusion between the palatal surface and the mucosal surface of the maxillary common denture. 19, it is shown that the Postdam (55) is formed on the posterior palatine side of the maxilla. A method of automatically forming such a Postdam in software will be described with reference to FIG. 20 .

In steps S310 to S330, the forward, lateral, and rear limit positions of the Postdam are identified, respectively. The anterior marginal position of the postdam may be 2 mm posterior to the mid-palatal eminence.

21 shows the anterior marginal position 2 mm posterior 57-3 from the Front Plane 57-2 at the point where the mid-palatal eminence 56 terminates. In order to find the point where the mid-palatal eminence 56 ends in the anterior to posterior direction, the analysis of the frontal segmented image may proceed from the most posterior surface 57 - 1 toward the front.

In the case of a patient in which the mid-palatal protrusion 56 is formed posteriorly to the position of the second premolar (not shown), 3 mm posteriorly (not shown) from the front surface 57-2 at the point where the mid-palatal protrusion 56 ends The forward limit position may be formed in

In some patients, the point where the mid-palatal eminence 56 ends posteriorly may be located posteriorly compared to normal. In this case, if the 2 mm rear 57-3 is set as the front limit position of the postdam, it may be difficult to secure an area sufficient for postdam formation. In this case, the anterior limit position may be formed 1 mm posteriorly (not shown) from the front surface 57-2 of the point where the mid-palatal eminence 56 ends.

In other words, 1 mm to 3 mm posterior from the front surface 57-2 of the point where the mid-palatal eminence 56 ends, may be set as the anterior limit position of the Postdam. In addition, in consideration of the relative position in the maxilla of the point where the mid-palatal elevation 56 ends posteriorly, the separation distance from the mid-palatal elevation 56 of the anterior limit position of the Postdam is between 1 mm and 3 mm. will be able to determine By determining the separation distance from the median palatal protrusion 56 of the anterior limit position in the range of 1 mm to 3 mm, it will be possible to minimize the feeling of discomfort or foreign body in the patient despite the formation of the postdam.

22 shows the Postdam lateral limit position 59 in the palatal direction 2 mm from the residual ridge baseline 58 . Residual alveolar reference line 58, for example, the angle of the palatal-side alveolus gradually increases from the palatal side to the labial side, and may be formed by connecting positions reaching the reference angle. In some embodiments, for patients with low residual alveolar resorption or excessive palatal protrusion of the maxillary nodule, the Postdam lateral limit position may be set at 1 mm palatal direction from the residual alveolar baseline 58. . Also, in some embodiments, for patients with severe alveolar resorption, the Postdam lateral limit position may be set 3 mm palatal from the residual alveolar baseline 58 .

In other words, 1 mm to 3 mm palatal direction from the residual alveolar baseline 58 may be set as the lateral limit position of the Postdam. In addition, the separation distance compared to the residual alveolar baseline 58 of the lateral limit position of the Postdam, considering the relative position in the maxilla of the residual alveolar baseline 58, software logic can automatically determine in the range of 1 mm to 3 mm There will be. By determining the separation distance from the residual alveolar baseline 58 of the lateral limit position in the range of 1 mm to 3 mm, it will be possible to minimize the feeling of discomfort or foreign body in the patient despite the formation of the postdam.

The rear limit position of the postdam may be set to be positioned rearward by a separation distance determined in the range of 1 mm to 3 mm from the position with the palate. For example, the vibration line (vibration line) can be located up to about 3mm rearward compared to the position with the palate. In this case, the rear limit position of the Postdam is set to be located 3mm rearward than the position with the palate. it could be In addition, the vibration line (vibration line) can be located close to 1mm rear compared to the position with the palate. In this case, the rear limit position of the Postdam can be set to be located 1 mm rearward than the position with the palate. There will be.

The distance between the palatine and the position of the rear limit position of the Postdam is automatically determined by software logic in the range of 1mm to 3mm in consideration of the relative position in the maxilla with the palatine, or based on the vibration line position input from the user , the software logic may automatically determine it. By determining the posterior separation distance from the palatine at the posterior limit position in the range of 1 mm to 3 mm, it will be possible to minimize the feeling of a foreign body sensation due to vibration by the patient despite the formation of the postdam.

Referring back to FIG. 20 , in step S340, a postdam is created at a position in consideration of the anterior limit position, the lateral limit position, and the posterior limit position, and is automatically formed in a position and shape reflecting the shape of the palate. The shape of the palate includes both an anterior plane shape and a sagittal plane shape. For a method of discriminating the frontal plane shape and a method of discriminating the sagittal plane shape, reference is made to the description with reference to FIGS. 8 to 9 .

23 is a diagram for explaining step S340 in more detail. As shown in FIG. 23 , when the sagittal plane shape is steep and the frontal plane shape is V-Shape, the posterior boundary of the Postdam is located 2 mm in front of the palatine, an anterior-posterior width of 2 mm and 2 mm The postdam is automatically formed to have a maximum depth of (S341). 24, it is shown that the V-shaped Postdam (60) is automatically formed in front of the palate and 2 mm. When the sagittal shape is steeply inclined and the frontal shape is V-Shape, the palatal inclination is severe and the vibration of the oscillation line is severe. It can be understood as reflected.

In addition, when the sagittal shape is an inclined (Mildly Inclined) type, and the frontal surface shape is O-Shape, the posterior boundary of the Postdam is located in the palatine fossa, an anterior-posterior width of 4 mm and a maximum depth of 2 mm The Postdam is automatically formed so as to have it (S342). 25 shows that the butterfly-shaped Postdam 60 is automatically formed based on the palate and position. When the sagittal shape is inclined and the frontal shape is O-Shape, the palatal inclination is normal and the vibration line is moderate, so it can be understood that the Postdam is also formed to handle the moderate vibration of the vibration line. will be.

When the sagittal shape is flat and the frontal shape is U-Shape, the posterior boundary of the Postdam is located 2 mm posterior to the palate, and the Postdam has an anterior-posterior width of 6 mm and a maximum depth of 2 mm. This is automatically formed (S343). 26 shows that the butterfly-shaped Postdam 60 is automatically formed based on the palate and position. When the sagittal shape is flat and the frontal shape is U-Shape, the palatal inclination is gentle and the vibration of the oscillation line is weak. There will be.

Next, a Postdam manual adjustment method according to another embodiment of the present invention will be described with reference to FIG. 27 . The Postdam manual adjustment method according to the present embodiment may also be performed by the computing device. All operations constituting the Postdam manual adjustment method according to the present embodiment may be performed by one computing device or may be performed by a plurality of computing devices. The computing device may be, for example, a personal terminal such as a desktop, a notebook computer, or a tablet. For example, the computing device may be the digital denture design device described with reference to FIG. 1 . In the description of the method according to the present embodiment, when a subject performing each operation is omitted, it may be understood that the subject performing each operation is the computing device. The method according to the present embodiment may be understood to correspond to step S400 included in the method described with reference to FIG. 3 .

In step S410, a Postdam automatically formed according to the above-described method is displayed. At this time, as shown in FIG. 28 , the automatically formed Postdam may be displayed overlaid on a corresponding position of the maxillary 3D model.

In step S420, the Postdam manual adjustment GUI is displayed. In some embodiments, to increase the intuitiveness of operation, the Postdam manual adjustment GUI may be displayed together with the automatically formed Postdam and the maxillary 3D model.

In one embodiment, the Postdam manual adjustment GUI is a six reference point movement user interface for adjusting the positions of the Postdam's anterior central reference point, anterior left projection reference point, anterior right projection reference point, left lateral reference point, right lateral reference point and posterior reference point (UI).

In another embodiment, the Postdam manual adjustment GUI includes a first indicator user interface (UI) for adjusting the width and depth of the rear reference point from the baseline, and the front center reference point width from the baseline. ) and a second indicator user interface (UI) for adjusting the depth thereof, and a third indicator user interface for adjusting the width and depth of the front right protrusion reference point and the front left protrusion reference point from the reference line (UI) and a third indicator user interface (UI) for adjusting the width and depth of the left lateral reference point and the right lateral reference point from the reference line.

In another embodiment, the Postdam manual adjustment GUI may include all of the six reference point movement user interfaces (UIs) and the first to fourth indicator user interfaces.

In step S430, the shape of the postdam is adjusted according to a user input input through the six reference point movement user interfaces. It will be described with reference to FIGS. 28 to 29 .

28, the front center reference point 61, the front left projection reference point 62-2, the front right projection reference point 62-1, the left lateral reference point 63-2, the right lateral reference point 63-1 and The positions of all of the rear reference points 64 are moved through a user input such as dragging, and the shape of the Postdam 60 may be adjusted accordingly. By a combination of these six postdam shape reference points 61, 62-1, 62-2, 63-1, 63-2, 64, a postdam shape within most applicable ranges can be expressed.

In some embodiments, even when dragging an area adjacent to the fiducial points 61, 62-2, 62-1, 63-2, 63-1, 64, the fiducial points 61, 62-2, 62-1, Of course, it can be processed as a drag input to 63-2, 63-1, and 64). In this case, there is an effect that UI feedback faithful to the user's intention can be provided even for an inexact user input.

Further, in some embodiments, when a specific position within a predetermined range adjacent to the reference points 61 , 62-2, 62-1, 63-2, 63-1, 64 is clicked, the closest reference point is the click position. Moving UI feedback may be provided.

29 shows the mid-palatal elevation 56 by moving the anterior left projection reference point 62-2 to the left and moving the anterior right projection reference point 62-1 to the right in consideration of the enlarged mid-palatal elevation 56. ) and the result of securing sufficient separation distance between the front of the Postdam.

The front left protrusion reference point 62-2, the front right protrusion reference point 62-1, the left lateral reference point 63-2, and the right lateral reference point 63-1 are all movable in the free direction, but the front center reference point ( 61) and the rear reference point 64 may be moved only in the forward and backward directions.

At this time, the anterior central reference point 61 must always be maintained at a distance of 2 mm or more from the mid-palatal protrusion 56. This is because the patient may feel pain when the postdam (60) is close to the mid-palatal elevation (56) by 2 mm or less. Also, the posterior fiducial point 64 cannot move further posteriorly beyond the posterior margin of the denture. As described above, since the position of the posterior margin is automatically determined by reflecting the shape of the palate, as a result, the posterior movement limit of the posterior reference point 64 is also automatically determined by reflecting the shape of the palate.

That is, if the sagittal plane shape is steep and the frontal plane shape is V-Shape, the posterior movement limit of the posterior reference point 64 will be 2 mm anterior to the palate on the maxillary 3D model. In addition, if the sagittal plane shape is inclined and the frontal plane shape is O-Shape, the posterior movement limit of the posterior reference point 64 will be set to the palatine and position on the maxillary 3D model. If the sagittal shape is a flat shape and the frontal plane shape is a U-Shape, the posterior movement limit of the posterior reference point 64 will be 2 mm posterior to the palate on the maxillary 3D model.

Next, according to a user input through the four indicator user interfaces, at least one of the distance 66 and the depth 67 from the reference line of the front central reference point 61 is adjusted (S440), or the front left and right protrusion reference points 62 At least one of the distance 66 and the depth 67 from the reference line of -1 and 62-2 is adjusted (S450), or the distance 66 of the left and right lateral reference points 63-1 and 63-2 from the reference line and at least one of the depth 67 is adjusted (S460), or at least one of the distance 66 and the depth 67 from the reference line of the rear reference point 64 is adjusted (S470).

30 shows the four indicator user interfaces. The reference line 68 serving as a reference for the distance 66 adjusted by the four indicator user interfaces may be a straight line connecting left and right hamular notch. That is, as shown in FIG. 30 , when the distance 66 of the rear reference point is 0.5, it means that the rear reference point 64 is moved forward by 0.5 mm from the reference line 68 .

As shown in FIG. 30 , the distance 66 can be easily adjusted through a drag operation on the shape adjustment bar 65 included in the four indicator user interfaces. When there is the drag operation, only the distance 66 may be adjusted, or the distance 66 and the depth 67 may be adjusted together. For example, the depth 67 value may also be adjusted as the distance 66 value is changed so that the volume of the postdam can be maintained at a constant level despite the change in the distance 66 value according to the drag operation. Of course, the four indicator user interfaces may also support direct input of the distance 66 and depth 67 values.

The shape of the Postdam 60 may be immediately updated as a feedback on the user input for the four indicator user interfaces. In FIG. 31, the user decreased the distance value 66 by using the indicator user interface of the front center reference point 61 and the front left and right protrusion reference points 62-1 and 62-2, and this narrowed the front-to-rear distance of the Postdam. can confirm.

Even according to the manual adjustment method of the Postdam described above, since the Postdam cannot deviate from the forward, lateral, and rear limit positions described with reference to FIG. 20, the six reference point movement user interfaces (UI) and the first indicator user interface to The fourth indicator user interface may provide feedback warning of user input that causes the Postdam to deviate from the forward, lateral, and rear limit positions.

In addition, both the postdam according to the automatic formation method of the postdam and the postdam formed according to the manual adjustment method, although the depth varies depending on the position of the postdam, as shown in FIG. do.

The methods according to the embodiments of the present invention described so far may be performed by executing a computer program embodied as computer readable code. The computer program may be transmitted from the first computing device to the second computing device through a network such as the Internet and installed in the second computing device, thereby being used in the second computing device. The first computing device and the second computing device include all of a server device, a physical server belonging to a server pool for a cloud service, and a stationary computing device such as a desktop PC.

Hereinafter, an exemplary computing device 500 capable of implementing the methods described in various embodiments of the present invention will be described with reference to FIG. 33 .

33 is an exemplary hardware configuration diagram illustrating the computing device 500 .

33 , the computing device 500 loads one or more processors 510 , a bus 550 , a communication interface 570 , and a computer program 591 executed by the processor 510 . It may include a memory 530 and a storage 590 for storing the computer program (591). However, only the components related to the embodiment of the present invention are illustrated in FIG. 33 . Accordingly, one of ordinary skill in the art to which the present invention pertains can see that other general-purpose components other than the components shown in FIG. 33 may be further included. The computing device 500 illustrated in FIG. 33 may indicate any one of physical servers belonging to a server farm that provides an Infrastructure-as-a-Service (IaaS) type cloud service.

The processor 510 controls the overall operation of each component of the computing device 500 . The processor 510 includes at least one of a central processing unit (CPU), a micro processor unit (MPU), a micro controller unit (MCU), a graphic processing unit (GPU), or any type of processor well known in the art. may be included. In addition, the processor 510 may perform an operation on at least one application or program for executing the method/operation according to various embodiments of the present disclosure. Computing device 500 may include one or more processors.

The memory 530 stores various data, commands, and/or information. The memory 530 may load one or more programs 591 from the storage 590 to execute methods/operations according to various embodiments of the present disclosure. For example, when the computer program 591 is loaded into the memory 530 , logic (or a module) as shown in FIG. 4 may be implemented on the memory 530 . An example of the memory 530 may be a RAM, but is not limited thereto.

The bus 550 provides a communication function between components of the computing device 500 . The bus 550 may be implemented as various types of buses, such as an address bus, a data bus, and a control bus.

The communication interface 570 supports wired/wireless Internet communication of the computing device 500 . The communication interface 570 may support various communication methods other than Internet communication. To this end, the communication interface 570 may be configured to include a communication module well-known in the art. The communication interface 570 is connected to at least one of the abnormal URL collection device, the security control server, and the target server described with reference to FIG. 1 through an intranet, thereby securing a fast communication speed.

The storage 590 may non-temporarily store one or more computer programs 591 . The storage 590 may include a non-volatile memory such as a flash memory, a hard disk, a removable disk, or any type of computer-readable recording medium well known in the art.

The computer program 591 may include one or more instructions in which methods/operations according to various embodiments of the present invention are implemented. When the computer program 591 is loaded into the memory 530 , the processor 510 may execute the one or more instructions to perform methods/operations according to various embodiments of the present disclosure.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (16)

A method performed by a computing device, comprising:
obtaining three-dimensional scan data of the maxilla;
automatically forming the remaining margins except for the posterior border by connecting inflection points outside the alveolar ridge on the positive maxillary 3D model according to the 3D scan data;
identifying a left pterygoid maxillary notch and a right pterygoid maxillary notch based on the height of the maxillary 3D model;
Using the images obtained by dividing the maxillary three-dimensional model into the frontal plane, the point where the mid-palatal elevation ends is identified, and the frontal split image is analyzed while moving backward from the point where the mid-palatal elevation ends. Identifying two palatine fovea dented below the width and depth; and
A step of automatically forming the posterior margin based on a reference line connecting the left pterygoid maxillary notch, the right pterygoid maxillary notch, and the two palates,
The step of automatically forming the posterior margin comprises:
Comprising the step of analyzing the shape of the maxillary three-dimensional model to determine the shape of the palate,
Determining the shape of the palate comprises:
In the sagittal plane division plane of the maxillary 3D model, the first quarter point, the 2/4 point, and the 3/4 point are formed by dividing the incisal papilla and the reference line into quarters. Based on the angle, selecting one of the sagittal shape of the inclined (Mildly Inclined) type, steep (Steep) type, and flat (Flat) type; and
In the frontal plane dividing plane of the maxillary three-dimensional model, based on the second angle formed by the mid-palatal suture and the point divided by 1/2 between the mid-palatal suture and the peaks of both alveolar ridges, V- comprising selecting a front face shape of one of shape, O-shape, and U-shape,
Automated marginal formation method for edentulous complete dentures. According to claim 1,
The scan target of the scan data is a positive model of the impression body of the maxilla,
The model is generated with a margin of 4 mm or more in the horizontal direction and 2 mm or more in the vertical direction from the alveolar outer inflection point formed on the impression body,
Automated marginal formation method for edentulous complete dentures. According to claim 1,
The scan target of the scan data is the impression body of the upper jaw,
The step of obtaining the three-dimensional scan data of the maxilla is,
The positive 3D model is generated using the negative impression body 3D model according to the scan data, but a margin of 4 mm in the horizontal direction and 2 mm in the vertical direction from the inflection points of the alveolar ridge on the 3D model of the negative impression body Including the step of generating the maxillary three-dimensional model with
Automated marginal formation method for edentulous complete dentures. According to claim 1,
The step of automatically forming the posterior margin comprises:
adjusting the baseline using the determined palatal shape; and
setting the adjusted baseline to the posterior margin;
Automated marginal formation method for edentulous complete dentures. delete According to claim 1,
The step of selecting the shape of the sagittal plane,
When the first angle is less than 145 degrees, the steep type is selected, when the first angle is 145 degrees or more and less than 170 degrees, the inclined type is selected, and when the first angle is 170 degrees or more, the flat type is selected. comprising the step of selecting a type,
Automated marginal formation method for edentulous complete dentures. According to claim 1,
The step of selecting the front surface shape is,
When the second angle at the 2/4 point is 160 degrees or more and the second angle at the 3/4 point is 150 degrees or more, the U-Shape is selected, and the second angle at the 2/4 point is the O-Shape is selected when the angle is greater than 130 degrees and less than 160 degrees and the second angle at the 3/4 point is more than 140 degrees and less than 150 degrees, wherein the second angle at the 2/4 point is 130 degrees and selecting the V-Shape when the second angle at the 3/4 point is 140 degrees or less.
Automated marginal formation method for edentulous complete dentures. 5. The method of claim 4,
The step of adjusting the baseline comprises:
When the sagittal shape is selected as the steeply inclined shape and the frontal shape is selected as the V-Shape, including moving the reference line 2 mm forward from the palatine,
Automated marginal formation method for edentulous complete dentures. 5. The method of claim 4,
The step of adjusting the baseline comprises:
When the sagittal shape is selected as the flat shape and the frontal shape is selected as the U-Shape, including moving the reference line 2 mm posteriorly from the palatine,
Automated marginal formation method for edentulous complete dentures. A method performed by a computing device, comprising:
obtaining three-dimensional scan data of the maxilla;
automatically forming the remaining margins except for the posterior border by connecting inflection points outside the alveolar ridge on the positive maxillary 3D model according to the 3D scan data;
identifying a left pterygoid maxillary notch and a right pterygoid maxillary notch based on the height of the maxillary 3D model;
Using the images obtained by dividing the maxillary three-dimensional model into the frontal plane, the point where the mid-palatal elevation ends is identified, and the frontal split image is analyzed while moving backward from the point where the mid-palatal elevation ends. Identifying two palatine fovea dented below the width and depth; and
A step of automatically forming the posterior margin based on a reference line connecting the left pterygoid maxillary notch, the right pterygoid maxillary notch, and the two palates,
The step of automatically forming the remaining edges except for the rear edge,
identifying a pure frenum and a narrow follicle adjacent to the alveolar;
automatically forming a margin by leaving a margin of 1 mm for the pure platoon; and
Comprising the step of automatically forming a margin by leaving a margin of 2mm with respect to the narrow platoon,
Automated marginal formation method for edentulous complete dentures. A method performed by a computing device, comprising:
obtaining three-dimensional scan data of the maxilla;
automatically forming the remaining margins except for the posterior border by connecting inflection points outside the alveolar ridge on the positive maxillary 3D model according to the 3D scan data;
identifying a left pterygoid maxillary notch and a right pterygoid maxillary notch based on the height of the maxillary 3D model;
Using the images obtained by dividing the maxillary three-dimensional model into the frontal plane, the point where the mid-palatal elevation ends is identified, and the frontal split image is analyzed while moving backward from the point where the mid-palatal elevation ends. Identifying two palatine fovea dented below the width and depth; and
A step of automatically forming the posterior margin based on a reference line connecting the left pterygoid maxillary notch, the right pterygoid maxillary notch, and the two palates,
The step of automatically forming the remaining edges except for the rear edge,
Comprising the step of generating thickness information of the margin,
The thickness information, that is determined using the distance between the outer inflection point of the alveolar and the outermost point of the maxillary three-dimensional model of the shape,
Automated marginal formation method for edentulous complete dentures. 12. The method of claim 11,
The step of generating the thickness information of the margin,
Comprising the step of setting the labial outline of the margin to the same shape as the outline between the outer inflection point of the alveolar ridge and the inflection point of the labial alveolar ridge,
Automated marginal formation method for edentulous complete dentures. A method performed by a computing device, comprising:
obtaining three-dimensional scan data of the maxilla;
automatically forming the remaining margins except for the posterior border by connecting inflection points outside the alveolar ridge on the positive maxillary 3D model according to the 3D scan data;
identifying a left pterygoid maxillary notch and a right pterygoid maxillary notch based on the height of the maxillary 3D model;
Using the images obtained by dividing the maxillary three-dimensional model into the frontal plane, the point where the mid-palatal elevation ends is identified, and the frontal split image is analyzed while moving backward from the point where the mid-palatal elevation ends. Identifying two palatine fovea dented below the width and depth; and
A step of automatically forming the posterior margin based on a reference line connecting the left pterygoid maxillary notch, the right pterygoid maxillary notch, and the two palates,
After the step of automatically forming the posterior margin, further comprising the step of further displaying a user interface for manually adjusting the automatically formed margin,
A user interface for manually adjusting the automatically formed margin,
A first user interface for moving the frontal reference line forward or backward;
a second user interface for moving the outer inflection point of the alveolar in the reference line;
a third user interface for moving the outermost point of the maxillary three-dimensional model at the baseline,
Automated marginal formation method for edentulous complete dentures. 14. The method of claim 13,
The user interface is displayed together with an image in which the maxillary 3D model is viewed from the bottom up, and height information in which the height information of the maxillary 3D model at the reference line is overlaid on the image. including an indicator,
The second user interface and the third user interface, on the height information indicator, to move the outer inflection point or the outermost point of the alveolar in any one direction of the labial or lingual side,
Automated marginal formation method for edentulous complete dentures. According to claim 1,
obtaining three-dimensional scan data of the mandible;
By forming a 3D model that is higher than the inflection point generated when passing the oral vestibule from the pure and buccal ridge identified in the three-dimensional scan data, the vertical direction is higher than the preset value, and the 3D model is wider than the preset value in the horizontal direction creating a mandible model;
automatically forming the remaining margins except for the posterior border by connecting the alveolar outer inflection points on the 3D mandible model; and
Using the position of the inflection point identified by the area formed higher in the vertical direction than the preset value, the position of the left and right retromolar pads on the 3D mandible model is identified, and the line connecting the left and right posterior molar triangles is drawn further comprising the step of determining as the back margin,
Automated marginal formation method for edentulous complete dentures. a network interface for receiving three-dimensional scan data of the maxilla;
memory into which the edentulous denture design program is loaded; and
Including a processor executing the program loaded into the memory,
The edentulous complete denture design program is
an instruction for automatically forming the remaining margins except for the posterior border by connecting the inflection points outside the alveolar ridge on the positive maxillary 3D model according to the 3D scan data;
an instruction for identifying a left lateral maxillary notch and a right pterygoid maxillary notch based on the height of the maxillary three-dimensional model;
Using the images obtained by dividing the maxillary three-dimensional model into the frontal plane, the point where the mid-palatal elevation ends is identified, and the frontal split image is analyzed while moving backward from the point where the mid-palatal elevation ends. instructions to identify two palatine fovea that are recessed below the width and depth; and
and instructions for automatically forming a posterior margin based on a reference line connecting the left pterygoid maxilla, the right pterygoid maxilla, and the two palates,
Instructions for automatically forming the posterior margin,
Including instructions for determining the shape of the palate by analyzing the shape of the maxillary three-dimensional model,
Instructions for determining the shape of the palate,
In the sagittal plane division plane of the maxillary 3D model, the first quarter point, the 2/4 point, and the 3/4 point are formed by dividing the incisal papilla and the reference line into quarters. Instruction for selecting one of the sagittal shape from among the inclined (Mildly Inclined) type, the steep type (Steep) type, and the flat type based on the angle; and
In the frontal plane dividing plane of the maxillary three-dimensional model, based on the second angle formed by the mid-palatal suture and the point divided by 1/2 between the mid-palatal suture and the peaks of both alveolar ridges, V- Containing instructions for selecting a front face shape of one of shape, O-shape and U-shape,
Denture design device.

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