JP2023145196A - Method for image data creation of upper-jaw dental shaped article, method for image data creation of lower-jaw dental shaped article, method for manufacturing upper-jaw dental shaped article, method for manufacturing lower-jaw dental shaped article, upper-jaw plate denture, lower-jaw dental shaped article, and dental shaped article set - Google Patents

Abstract

To provide a method for image data creation of an upper-jaw dental shaped article capable of reducing a burden on a patient with an edentulous jaw.SOLUTION: The method for image data creation of an upper-jaw dental shaped article comprises steps of: creating image data of an upper-jaw plate denture on a CAD screen; creating occlusal face data corresponding to the occlusal face of the upper-jaw plate denture on the CAD screen, based on the position of an upper-jaw artificial tooth in the created image data of the upper-jaw plate denture; creating image data of a plotting plate, based on the created occlusal face data; and connecting the created image data of the plotting plate with the image data of the upper-jaw plate denture or image data of an upper-jaw dental plate to create designing image data 100 of the upper-jaw dental shaped article.SELECTED DRAWING: Figure 6

Description

The present disclosure provides a method for creating image data of a dental molding of an upper jaw, a method of creating image data of a dental molding of a mandible, a method of manufacturing a dental molding of a mandible, a method of manufacturing a dental molding of a mandible, a maxillary denture, The present invention relates to a lower jaw dental model and a dental model set.

Conventionally, when manufacturing dentures for use in daily life by edentulous patients, it has been known to manufacture in advance an occlusal bed that fits the patient's unique alveolar ridge. The occlusal floor is created between the upper and lower dentures to define the vertical intermaxillary relationship as a reference point for stabilizing the temporomandibular joint and the bite of the upper and lower teeth, and also for the horizontal intermaxillary relationship. To define the relationship, it is also used as a device to delineate the Gothic arch, which represents the limited movement of the patient's mandible. Specifically, a drawing board on which a Gothic arch is drawn is usually provided on the occlusal floor of the upper jaw.

On the other hand, the occlusal floor of the lower jaw is provided with a drawing needle for drawing a Gothic arch on a drawing board on the maxillary side, and a support plate for fixing the drawing needle. The drawing needle is provided on a support plate attached to the occlusal floor of the mandible at a predetermined position that overlaps with the patient's midsagittal plane. For example, when a patient wearing an occlusal bed moves his or her lower jaw forward, backward, left, or right, the locus of movement of the lower jaw is recorded as a Gothic arch on the maxillary writing board by a writing needle on the mandible.

Patent Document 1 discloses a recording device as an example of an occlusion bed. In the recording device of Patent Document 1, as shown in FIG. 1, the movement of the lower jaw in the anteroposterior direction is drawn on a recording board 1 serving as a drawing board as a line of a forward limit movement path 2a extending vertically. Further, the movement of the lower jaw in the left-right direction is depicted as a line of lateral limit movement path 2b that extends obliquely. In Patent Document 1, the state in which the tip of the recording contact needle as a drawing needle overlaps the position of the vertex 2, which is the tip of the arrow of the Gothic arch recorded on the recording plate 1, is defined as the horizontal position of the mandible with respect to the maxilla. It is said that it can be defined as the central position of the intermaxillary relationship that serves as a reference point in the intermaxillary relationship.

Japanese Patent Application Publication No. 11-318956

Here, when manufacturing dentures with dentures used in daily life using a Gothic arch drawing device such as Patent Document 1, edentulous patients may need to visit the dentist multiple times. For example, when a patient first comes to the clinic, it is necessary to take an impression of the alveolar ridge of an edentulous patient. First, upper and lower personal trays are manufactured using the taken impressions of the alveolar ridge.

Next, when the patient visits the hospital for the second time, precise impressions are taken using the manufactured upper and lower personal trays, and the upper and lower jaw occlusal beds are created. At this time, an occlusal bed of an average size is manufactured according to the patient's gender, age, height, etc. Next, when the patient visits the hospital for the third time, the patient wears the manufactured occlusal bed. The dentist determines the patient's specific vertical height between the upper and lower jaws by examining the patient while wearing the device.

Based on the obtained vertical intermaxillary relationship, the dentist visually determines the attachment position of the drawing board on the occlusal floor of the upper jaw so that the drawing surface of the drawing board is attached parallel to the occlusal surface. In addition, when the occlusal floor of the mandible is attached to the mandibular ridge of the patient, the dentist should install the supporting plate parallel to the occlusal surface in order to make the drawing needle perpendicular to the drawing surface. Determine the attachment position of the support plate on the occlusal floor visually.

Based on the determined vertical height and the determined mounting position of the drawing board, an occlusal floor of the upper jaw to which the drawing board is attached is manufactured. In addition, based on the determined vertical height and the determined attachment position of the support plate, a mandibular occlusal floor is manufactured to which a support plate is attached that supports a drawing needle whose protrusion height from the upper surface is set. be done. For example, an occlusal floor set can be prepared by combining an occlusal floor for the upper jaw and an occlusal floor for the lower jaw.

Finally, when the patient visits the hospital for the fourth time, the patient wears the prepared occlusal floor set. The depiction of the Gothic arch using the occlusal floor set allows the definition of reference points in the horizontal intermaxillary relationship. As described above, in the case of Patent Document 1, the number of visits to the hospital for drawing the Gothic arch is relatively large, so there is a problem in that patients, especially elderly people, are physically burdened by the visits.

In addition, if the number of adjustments to the shape of the occlusal floor increases, the number of times to determine the vertical height, or the number of times to draw the Gothic arch increases, the number of hospital visits will not be limited to four, but may increase to five or more. The burden of going to the hospital becomes even greater. Furthermore, due to deterioration due to long-term use, it becomes necessary to replace existing dentures with new dentures, which incurs the burden of hospital visits each time the dentures are replaced. In this specification, the term "dental model" is used as a concept that includes both a denture and a denture base.

The present disclosure provides technology related to a denture and a denture base that can be used as a Gothic arch drawing device. The present disclosure has been made with attention to the above-mentioned problems, and includes a method for creating image data of a dental structure in the upper jaw, which can reduce the burden on an edentulous patient, and a method for creating image data for a dental structure in the lower jaw, which can reduce the burden on edentulous patients. The present invention aims to provide a method for creating image data, a method for manufacturing an upper jaw dental model, a method for manufacturing a lower jaw dental model, a maxillary denture, a lower jaw dental model, and a dental model set.

Means for solving the above problems include the following aspects.
<1> The process of creating image data of the maxillary denture on the CAD screen, and the process of creating the image data of the maxillary denture on the CAD screen based on the position of the artificial tooth in the created image data of the maxillary denture. A step of creating occlusal surface data corresponding to the occlusal surface of the denture, a step of creating image data of a drawing board based on the created occlusal surface data, and a step of creating image data of the created drawing board on the upper jaw. A method for creating image data for an maxillary dental structure, the method comprising: creating image data for designing an maxillary dental structure by linking to image data of a denture base or image data of an maxillary denture base.

According to the configuration <1> above, image data for designing the dental model of the upper jaw is created on the CAD screen. The created image data of the maxillary dental model can be used, for example, as image data for manufacturing the maxillary dental model. For this reason, dental structures such as dentures that match the shape of the patient's maxillary ridge can be manufactured without taking an impression of the patient's maxillary ridge, eliminating the need for the patient to visit the hospital to take an impression. do not have.

<2> In the step of creating image data of the drawing board, the drawing board to be created may have a drawing surface parallel to the occlusal surface.

According to the configuration <2> above, the drawing board has a drawing surface parallel to the occlusal surface in the design image data. Here, when the drawing plate is attached to the occlusal floor of the upper jaw, a dentist or the like needs to have a skilled technique in order to accurately determine the attachment position of the drawing plate by visual inspection. If the mounting precision of the drawing board is low, the drawing precision of the Gothic arch will be low. This makes it difficult to appropriately define the relative positional relationship between the occlusal floor of the upper jaw and the occlusal floor of the lower jaw, including the horizontal intermaxillary relationship. In addition, the low accuracy of attaching the drawing board results in the need to correct the drawing of the Gothic arch, resulting in an increase in the number of visits to the hospital by the patient. Therefore, according to the configuration <2> above, the attachment position of the drawing plate can be determined with increased accuracy without having to be determined visually as in the case of the occlusal floor.

Furthermore, the Gothic arch needs to be drawn with the patient-specific vertical height between the upper and lower jaws and the occlusal plane determined. In particular, in order to accurately draw the Gothic arch, the drawing surface of the drawing board needs to be parallel to the patient's unique occlusal plane. Therefore, when the drawing board has a drawing surface parallel to the occlusal surface, the accuracy of the Gothic arch can be improved.

<3> The step further includes the step of acquiring scan data of the maxillary denture by scanning the existing maxillary denture, and the step of creating image data of the maxillary denture, the acquired maxillary denture The method for creating image data of an maxillary dental model according to <1> or <2> above, wherein image data of a maxillary denture is created based on scan data of a maxillary denture.

According to the configuration <3> above, the image data of the maxillary dental model is created based on the scan data of the existing maxillary denture. Therefore, the shape of the manufactured maxillary dental model matches the shape of the existing maxillary denture. As a result, when a patient wears the manufactured maxillary dental model, the patient feels less discomfort.

<4> A dental model of the maxilla based on image data for designing a dental model of the maxilla created by the image data creation method for a dental model of the maxilla according to any one of <1> to <3> above. A method for manufacturing an maxillary dental model, the method comprising: creating manufacturing image data for the maxilla; and inputting the created manufacturing image data into a three-dimensional molding device to mold the maxillary dental model. .

According to the above configuration <4>, based on the image data for designing the maxillary dental structure created by the image data creation method for the maxillary dental structure described in any one of the above <1> to <3>. Thus, image data for manufacturing the dental model of the upper jaw is created. Therefore, it is possible to manufacture a dental model of the upper jaw that can reduce the burden on the patient.

<5> A step of creating image data of the mandibular denture on the CAD screen, and based on the position of the artificial tooth in the created image data of the mandibular denture, the presence of the mandible on the CAD screen. A process of creating occlusal surface data corresponding to the occlusal surface of the denture, and a drawing needle to draw the locus of movement of the lower jaw when drawing the Gothic arch on the maxillary side drawing board based on the created occlusal surface data. A step of creating image data of a groove into which a support plate to be fixed having an upper surface parallel to the occlusal surface is removably fitted, and converting the image data of the created groove to image data of a mandibular denture or a step of creating image data for designing a dental model of the lower jaw having grooves provided in a pair of inner walls facing each other and located on the lingual side by linking with image data of the denture base of the lower jaw; A method for creating image data of a dental model of the mandible, including:

According to the configuration <5> above, image data for designing a dental model of the lower jaw is created on the CAD screen. The created image data for designing a dental model for the lower jaw can be used, for example, as image data for manufacturing a denture base for the lower jaw. Therefore, dental structures such as denture bases that match the shape of the mandibular ridge can be manufactured without taking an impression of the patient's mandibular ridge, so there is no need for the patient to visit the hospital to take an impression. .

<6> In the step of creating image data of the groove, the support plate may have an upper surface parallel to the occlusal surface.

According to configuration <6> above, the support plate has an upper surface parallel to the occlusal surface in the design image data. Here, when the support plate is attached to the occlusal floor of the lower jaw, the attachment position of the support plate is determined accurately by visual inspection, which requires a skilled technique as in the case of the upper jaw. Therefore, according to the configuration <6> above, the attachment position of the support plate can be determined with increased accuracy without having to be determined visually as in the case of the occlusal floor. Also, as in the case of the upper jaw, the accuracy of the Gothic arch can be improved.

<7> The method for creating image data of a dental structure of a mandible according to <6> above, wherein in the step of creating image data of the grooves, the extending direction of the grooves is aligned parallel to the occlusal surface.

According to the configuration <7> above, since the groove extends parallel to the occlusal surface, the upper surface of the support plate is aligned parallel to the occlusal surface. Therefore, simply by attaching the drawing needle perpendicularly to the upper surface, the drawing needle will be perpendicular to the occlusal surface, making it easy to improve the accuracy of drawing Gothic arches.

<8> Further comprising the step of acquiring scan data of the mandibular denture by scanning the existing mandibular denture, and in the step of creating image data of the mandibular denture, the acquired mandibular denture The method for creating image data of a dental model of a mandible according to any one of <5> to <7> above, wherein image data of a mandibular denture is created based on scan data of a mandibular denture.

According to the configuration <8> above, the image data of the lower jaw denture is created based on the scan data of the existing lower jaw denture. Therefore, the shape of the manufactured lower jaw dental model matches the shape of the existing lower jaw denture. As a result, when a patient wears the manufactured lower jaw dental model, the patient feels less discomfort.

<9> The method for creating image data of a dental structure of a lower jaw according to any one of <5> to <8> above, wherein the groove has a linear shape extending in the front-back direction.

According to the configuration <9> above, since the groove has a linear shape extending in the front-rear direction, the support plate can be slid in the front-rear direction when the support plate is fitted into the groove. Therefore, the support plate can be easily attached and detached.

<10> A dental model of the mandible based on image data for designing a dental model of the mandible created by the image data creation method for a dental model of the mandible according to any one of <5> to <9> above. A method for producing a dental model of a lower jaw, the method comprising: creating image data for production of the lower jaw; and inputting the created image data for production into a three-dimensional molding device to mold the dental model of the lower jaw. .

According to the configuration <10> above, based on the image data for designing a dental structure for the lower jaw created by the image data creation method for the dental structure for the lower jaw described in any one of <5> to <9> above. Thus, image data for manufacturing a dental model of the lower jaw is created. Therefore, it is possible to manufacture a dental model of the lower jaw that can reduce the burden on the patient.

<11> The maxillary denture base, the maxillary artificial tooth provided on the maxillary denture base, and the maxillary denture base, which are bridged between a pair of inner walls located on the lingual side and facing each other, and made of acrylic resin and methacrylic resin. An maxillary denture comprising: a drawing board consisting of at least one of the above.

According to the configuration <11> above, it is possible to realize an maxillary denture that can reduce the burden on the patient.

<12> The maxillary denture according to <11> above, wherein the maxillary denture base, the maxillary artificial tooth, and the drawing plate are integrally molded.

According to the configuration <12> above, the maxillary denture base can be manufactured more easily than when the maxillary denture base, the maxillary artificial tooth, and the drawing plate are manufactured separately and then joined together.

<13> A support plate is removably fitted into the lower jaw denture base and a pair of inner walls facing each other and located on the lingual side of the lower jaw denture base and fixing a writing needle that draws a Gothic arch on the writing plate. A support for fixing a drawing needle that draws a Gothic arch on a drawing board, which is provided on a pair of inner walls facing each other and located on the lingual side of a mandibular fixed denture, or a mandibular fixed denture. A dental model of a lower jaw having a groove into which a plate is removably fitted.

According to the configuration <13> above, similarly to the case <5> above, it is possible to realize a dental model of the lower jaw that can reduce the burden on the patient.

Further, when a dental model of the lower jaw without a support plate is attached to the lower jaw as an impression tray for taking an impression of the lower jaw, no structure exists between the pair of inner walls of the dental model. That is, when the dental model of the lower jaw is also used as a tray for taking impressions, the wearer can easily move the tongue located between the inner walls, and the feeling of wearing the tray when taking impressions can be improved.

<14> An maxillary denture base, an maxillary artificial tooth provided on the maxillary denture base, and a drawing board spanning a pair of inner walls facing each other and located on the lingual side of the maxillary denture base, a maxillary denture with a maxillary denture, a mandibular denture base, a mandibular artificial tooth provided on the mandibular denture base, and a pair of inner walls located on the lingual side and facing each other in the mandibular denture base. A lower mandibular denture having a groove into which a support plate for fixing a drawing needle that draws a Gothic arch on the drawing board is removably fitted, and which face each other vertically on the left and right sides of the median sagittal plane. Within the group created by the molars of the maxillary artificial teeth and the molars of the mandibular artificial teeth, the position of the lowest end of the molars of the maxillary artificial teeth is the position of the highest end of the molars of the mandibular artificial teeth, or in the denture base of the mandible. Higher than the uppermost position of the part of the mandibular artificial tooth where the molars are placed, or located on the lingual side of the maxillary denture base, the maxillary artificial tooth installed on the maxillary denture base, and the maxillary denture base, respectively. and a drawing board spanning a pair of mutually opposing inner walls, a lower jaw denture base, and a pair of mutually opposing inner sides located on the lingual side of the lower jaw denture base, respectively. A dental model set comprising a lower jaw denture base and a groove into which a support plate is removably fitted to fix a drawing needle that draws a Gothic arch on a drawing board provided on a wall.

According to the configuration <14> above, in the case of a combination of an maxillary fixed denture and a lower fixed denture, the molars of the maxillary artificial teeth and the mandibular artificial teeth face each other vertically on the left and right sides of the median sagittal plane, respectively. Groups are created by the molars of the teeth. Within each group, the position of the lowest end of the molar of the maxillary artificial tooth is the position of the highest end of the molar of the mandibular artificial tooth, or the position of the highest end of the part of the mandibular denture base where the molar of the mandibular artificial tooth is placed. higher than the position. Therefore, when the mandible moves back and forth and left and right when drawing a Gothic arch, the molars of the mandibular artificial teeth or the part of the mandibular denture base where the molars of the mandibular artificial teeth are placed approach the molars of the maxillary artificial teeth. However, they can be prevented from coming into contact with each other. As a result, movement of the lower jaw becomes less likely to be inhibited. Furthermore, in the case of a combination of a maxillary denture base and a mandibular denture base, there is no mandibular artificial tooth, so the movement of the mandible is less likely to be inhibited. Therefore, the accuracy of drawing the Gothic arch can be improved.

According to the present disclosure, a method of creating image data of an maxillary dental structure, a method of creating image data of a mandibular dental structure, and a method of manufacturing a maxillary dental structure that can reduce the burden on an edentulous patient. , a method for manufacturing a lower jaw dental model, an upper jaw denture, a lower jaw dental model, and a dental model set.

FIG. 2 is a perspective view illustrating a maxillary denture with a drawing board, which is modeled using the image data creation method for a maxillary dental model according to an embodiment of the present disclosure. FIG. 2 is a rear view of the maxillary dental model according to the present embodiment viewed from the rear side with the occlusal surface placed horizontally. FIG. 2 is a perspective view illustrating a lower jaw denture base having a groove, which is modeled using the image data creation method for a lower jaw dental model according to the present embodiment. FIG. 2 is a cross-sectional view of the dental model of the lower jaw according to the present embodiment, viewed from the left side with the denture base cut along the median sagittal plane. FIG. 2 is a perspective view illustrating a state in which a support plate supporting a drawing needle is attached to a groove of the dental model of the lower jaw according to the present embodiment. FIG. 2 is a diagram illustrating the configuration of an image data creation device in which the method of creating image data of an upper jaw dental model and the method of creating image data of a lower jaw denture base according to the present embodiment is used together with a three-dimensional molding device. 2 is a flowchart illustrating a method for creating image data of maxillary dental model teeth and a method for manufacturing an maxillary denture according to the present embodiment. FIG. 1 is a perspective view illustrating a three-dimensional scanner (3D scanner) that scans a dental model of the upper jaw from a 360-degree direction according to the present embodiment. FIG. 3 is a perspective view illustrating a state in which image data of a drawing plate is connected to image data of an maxillary denture in the method for creating image data of a dental model of the maxilla according to the present embodiment. 2 is a flowchart illustrating a method for creating image data of a dental model for a lower jaw and a method for manufacturing a denture base for a lower jaw according to the present embodiment. FIG. 2 is a cross-sectional view of the dental model set according to the present embodiment, viewed from the left side in a state where the dental model set is cut along the median sagittal plane.

Embodiments of the present disclosure will be described below. In the description of the drawings below, the same or similar parts are denoted by the same or similar symbols. However, the drawings are schematic, and the relationship between thickness and planar dimensions, the ratio of the thickness of each device and each member, etc. are different from the reality. Therefore, specific thickness and dimensions should be determined with reference to the following explanation. Furthermore, the drawings include portions that differ in dimensional relationships and ratios.

<Maxillary denture>
First, a maxillary denture 10 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. As shown in FIG. 1, the maxillary denture base 10 includes an maxillary denture base 12, an maxillary artificial tooth 14, and a drawing plate 16. The maxillary denture 10 corresponds to the maxillary dental model of the present disclosure. The maxillary denture base 12, the maxillary artificial tooth 14, and the drawing plate 16 are integrally molded using a resin such as a resin ((meth)acrylic resin, etc.).

Note that in the present disclosure, the maxillary denture base, the maxillary artificial tooth, and the drawing plate do not need to be integrally molded. Part or all of the maxillary denture base, the maxillary artificial tooth, and the drawing board may be manufactured separately and then joined together. Moreover, in the present disclosure, "(meth)acrylic resin" indicates that at least one of methacrylic resin and acrylic resin is included. Further, the maxillary denture base 10 and the maxillary denture base 12 according to the present embodiment are used on a trial basis as a Gothic arch recording device.

The maxillary artificial tooth 14 is provided on the top of the maxillary denture base 12. The drawing board 16 spans a pair of inner walls of the denture base 12. The pair of inner walls are located on the lingual side of the maxillary denture base 12 and face each other.

In this embodiment, regarding the anteroposterior direction, as shown in FIG. 1, when used without special explanation, the direction toward the front teeth located on the labial side of the denture (upper right side in FIG. 1) is referred to as It is defined as "front side FR". Similarly, the direction toward the throat side (lower left side in FIG. 1) is defined as "rear side RR."

Regarding the left and right direction, in this embodiment, as shown in FIGS. 1 and 2, when used without special explanation, the left side of the median sagittal plane A is " It will be used in the explanation as "left side L". Similarly, the right side of the median sagittal plane A will be referred to as "right side R" in the description.

In addition, in this embodiment, in the vertical direction, as shown in FIG. 2, when used without special explanation, the terms "upper side" and "lower side" regarding the maxillary side refer to the maxillary fixed denture. 10 means the vertical direction in a state where it is attached to the maxillary ridge. Note that the meaning of the vertical direction in the case of a maxillary denture base 12 in which the maxillary artificial tooth 14 is not provided is also the same as in the case of the maxillary denture 10 with a base.

As shown in FIG. 2, in a state where the maxillary denture 10 is attached to the maxillary ridge, the recess 12A that fits into the maxillary ridge opens above where the maxillary ridge is located. Moreover, the maxillary artificial tooth 14 protrudes downward from the denture base 12. Note that illustration of the maxillary ridge is omitted. The occlusal plane OS extends horizontally in FIG. 2 and is perpendicular to the midsagittal plane A. A drawing surface 16A (lower surface in FIG. 2) of the drawing board 16 is provided parallel to the occlusal surface OS.

In this embodiment, all the maxillary artificial teeth 14 are provided on the maxillary denture 10, so when the maxillary denture 10 is installed, the final maxillary denture is not installed. Aesthetics can be visually confirmed in advance. In addition, by providing two front teeth that sandwich the midsagittal plane, for example, when the upper jaw denture 10 is used in combination with the lower jaw denture or denture base, the lower jaw denture or denture base It is easy to confirm the position of the midsagittal plane on the side.

<Mandibular denture base>
Next, the lower jaw denture base 21 according to this embodiment will be explained with reference to FIGS. 3 and 4. The lower jaw denture base 21 corresponds to the lower jaw dental model of the present disclosure. As shown in FIG. 3, the lower jaw denture base 21 has a lower jaw denture base 22 and a groove 26. The lower jaw denture base 21 is molded using a resin such as a (meth)acrylic resin, for example. The grooves 26 are provided in a pair of inner walls facing each other and located on the lingual side of the denture base 22 of the lower jaw.

As shown in FIG. 4, when the mandibular denture base 21 is attached to the mandibular ridge, the recess 22A opens to the lower side where the mandibular ridge is located. Note that illustration of the mandibular ridge is omitted. Further, although in FIG. 4, no mandibular artificial teeth are provided on the mandibular denture base 21, in the present disclosure, mandibular artificial teeth that protrude upward from the mandibular denture base 22 are provided at the top of the mandibular denture base 22. A mandibular denture may be realized by this. Note that the same applies to the lower jaw denture (for example, the lower jaw denture 20 in FIG. 5) described later in the present disclosure, and the lower jaw denture is not provided with a mandibular artificial tooth instead of the lower jaw denture. A floor may also be realized.

In addition, in this embodiment, regarding the vertical direction, as shown in FIG. 4, when used without special explanation, the terms "upper side" and "lower side" regarding the lower jaw side are used when the denture base 21 of the lower jaw is This means the vertical direction when attached to the mandibular ridge. As shown in FIG. 5, the meaning of the vertical direction in the case of the mandibular denture 20 in which the mandibular artificial teeth 24 are provided on the denture base 12 is the same as in the case of the mandibular denture base 21.

The occlusal plane OS extends horizontally in FIG. The shape of the groove 26 is linear, and the groove 26 extends parallel to the occlusal surface OS along the anteroposterior direction.

(Mandible denture according to this embodiment)
FIG. 5 illustrates a mandibular denture 20 in which a support plate 28 to which a drawing needle 29 is fixed is fitted into a groove of a mandibular denture base 21 according to the present embodiment. By forming protrusions corresponding to the shape of the groove 26, for example, at both ends of the support plate 28 in the left and right direction, the support plate 28 can be removably fitted into the groove 26.

A through hole 28A is provided in the center of the support plate 28. The inner diameter of the through hole 28A is approximately the same as the outer diameter of the drawing needle 29. A female screw portion is formed on the inner surface of the through hole 28A. A male threaded portion corresponding to the female threaded portion is formed on the outer peripheral surface of the drawing needle 29.

The position at which the drawing needle 29 is fixed by the support plate 28 is determined by the coupling position of the male threaded portion of the drawing needle 29 and the female threaded portion of the through hole 28A. That is, by changing the coupling position, the height of the drawing needle 29 protruding from the upper surface of the support plate 28 can be adjusted. Therefore, it is possible to adjust and determine the patient's occlusal height.

Further, the drawing needle 29 draws the locus of the movement of the lower jaw as a Gothic arch on the drawing surface 16A of the drawing plate 16 provided on the maxillary denture 10 during the limit movement of the wearer's lower jaw. It is therefore possible to determine the horizontal intermaxillary relationship of the patient. The mandibular denture base 20 and the mandibular denture base 22 according to this embodiment are used on a trial basis as a Gothic arch recording device.

<Image data creation device and manufacturing device>
Next, a dental model manufacturing device including the design image data creation device 40 and the three-dimensional molding device 60 according to the present embodiment will be described with reference to FIG. 6. In this embodiment, the dental model includes an upper jaw denture 10, an upper jaw denture base, a lower jaw denture 20, and a lower jaw denture base 21. First, as shown in FIG. 6, the dental model manufacturing device according to the present embodiment includes an image data acquisition device 30, a design image data creation device 40, a manufacturing image data creation device 50, and a three-dimensional molding device 60. .

(Image data acquisition device)
The image data acquisition device 30 is, for example, a 3D scanner, and is connected to the design image data creation device 40. The image data acquisition device 30, for example, scans an maxillary denture actually used by a patient and acquires image data indicating a three-dimensional (3D) shape of the maxillary denture.

The acquired image data is input to the design image data creation device 40. Note that in the present disclosure, the image data acquisition device 30 is not essential, and, for example, 3D shape data created by arbitrary software and prepared in advance may be input to the design image data creation device 40.

(Design image data creation device)
The design image data creation device 40 of this embodiment is, for example, a general-purpose personal computer, etc., equipped with a central integrated circuit (CPU), a storage device, an input device, and a display device (output device), all of which are not shown. can be used. The design image data creation device 40 has a 3D-CAD function as an image processing program for processing image data. The design image data creation device 40 corresponds to the “image data creation device” of the present disclosure. A manufacturing image data creating device 50 is connected to the design image data creating device 40 .

Although not shown, the design image data creation device 40 includes an arithmetic unit having an image data acquisition section and an image data creation section. The image data acquisition unit acquires image data from the image data acquisition device 30. The image data creation section is an area that executes 3D-CAD functions.

The image data creation unit creates image data of the dental model by processing the image data acquired by the image data acquisition device 30 into a shape suitable for use as an actual dental model. The processing includes, for example, a process of deleting the shape of an unnecessary part included in a scanned image immediately after scanning, a process of integrating image data when a plurality of image data are acquired, and the like.

When the dental model is a maxillary denture, the image data creation unit converts the image data of the maxillary denture and the image data of the drawing plate into a single data representing the shape of one maxillary denture. are connected by linking each of them to a single piece of data. Design image data 100 is created by the connection. Design image data 100 includes, as data areas in a virtual 3D coordinate space, an area corresponding to the denture base of the scanned existing maxillary denture, an area corresponding to the maxillary artificial tooth, and an area corresponding to the drawing board. and has.

That is, in the design image data 100 after connection, the image data of the maxillary denture and the image data of the drawing board are integrated. For example, if the design image data 100 is selected by clicking or the like in the virtual 3D coordinate space, the image data of the maxillary denture and the image data of the drawing board will not be separated, and the image data of the maxillary denture and the image data of the drawing plate will not be separated. The image data on the drawing board can be moved integrally with the image data on the drawing board.

The image data creation method according to this embodiment is implemented by the 3D-CAD of the design image data creation device 40. Specifically, for example, the designer can move, arrange, and rotate the image data of the maxillary denture to any position in the virtual 3D coordinate space on the display of the design image data creation device 40. be. Also, for example, the shape of the image data of the drawing board is created using one or more features, and the created image data of the drawing board is placed on top of the image data of the maxillary denture in the 3D coordinate space. They can be moved and stacked, and connected to each other at predetermined positions.

Here, CAD is advantageous in design work compared to CAM. For example, CAD usually provides more types of features that can be adopted than CAM. Further, in CAD, the degree of freedom in movement and rotation of image data on the drawing board is higher than in the case of CAM. Additionally, in CAD, the shape of the image data of the maxillary denture or the image data of the drawing board is partially changed while maintaining the connection between the image data of the maxillary denture and the image data of the drawing board. It is also easy. Therefore, by using CAD, it becomes possible to efficiently and accurately create the design image data 100.

(Manufacturing image data creation device)
Like the design image data creation device 40, the manufacturing image data creation device 50 is a computer including a central integrated circuit (not shown), a storage device, an input/output device, etc., and has a CAM function. A three-dimensional molding device 60 is connected to the manufacturing image data creation device 50 .

The manufacturing image data creation device 50 processes the design image data 100 in a virtual 3D coordinate space to create manufacturing image data for modeling by the three-dimensional molding device 60. Specifically, for example, modeling conditions such as the placement angle and distance of the maxillary denture with respect to the build table of the three-dimensional molding device 60 are set, and the set modeling conditions are reflected in the manufacturing image data by CAM. .

As shown in FIG. 6, the manufacturing image data processed by CAM is suspended as a data area in the virtual 3D coordinate space in the build table area corresponding to the build table by multiple support pin areas corresponding to the support pins. It's lowered. The manufacturing image data is input to the three-dimensional molding device 60.

(Three-dimensional molding device)
As shown in FIG. 6, the three-dimensional forming apparatus 60 is a hanging type 3D printer, and forms a dental model by a liquid bath photopolymerization method. Note that in the present disclosure, the three-dimensional molding device is not limited to a 3D printer, and may be a milling machine, for example.

The three-dimensional molding device 60 includes a liquid tank 62 that stores a liquid photocurable liquid resin 64, a build table 66 that serves as a base for a dental model, and a hanging member 68 that suspends the build table 66. In FIG. 6, a light irradiator 69 is provided below the liquid tank 62 to irradiate the lower surface of the build table 66 with light.

Note that although the three-dimensional molding device 60 of this embodiment is of a hanging type, the present disclosure is not limited thereto. Further, in this embodiment, stereolithography using a DLP (Digital Light Processing) method is exemplified; however, the present invention is not limited to this, and includes, for example, stereolithography using an SLA (Stereolithography) method, and stereolithography using an LCD (Liquid Crystal Display) method. , or other modeling methods such as inkjet stereolithography may be employed.

The light irradiation device 69 selects light of a predetermined wavelength, such as ultraviolet light, toward the lower side of the build table 66 immersed in the liquid tank 62 based on the manufacturing image data input to the three-dimensional molding device 60. irradiate the target. By light irradiation, the liquid resin 64 is photopolymerized and selectively hardened in the formation region 63 having a certain thickness, and a resin layer of the object to be modeled is formed. Then, by moving the hanging member 68 upward in FIG. 6, the build table 66 is raised by the set thickness of the resin layer.

By selectively irradiating light using the light irradiator 69, a subsequent resin layer is laminated and formed under the previously formed resin layer. FIG. 6 illustrates a state in which a part of the maxillary denture being modeled is suspended by a support pin 70 extending from the lower surface of the build table 66. By repeating the raising of the build table 66 and the irradiation of light, the maxillary denture as shown in FIG. 1 is finally modeled.

<How to create image data for maxillary dentures>
Next, a method for creating image data for an maxillary denture according to this embodiment will be described with reference to FIGS. 7 to 9. As shown in FIG. 7, first, in step S11, scan data of the maxillary denture is acquired by scanning the maxillary denture.

In FIG. 8, a case is illustrated in which a three-dimensional (3D) scanner serving as the image data acquisition device 30 scans an existing maxillary denture 10A that is currently being used by a patient. Note that in the present disclosure, the existing maxillary denture to be scanned is not limited to the maxillary denture currently in use; for example, it may be an maxillary denture that was previously used but is not currently in use. It's okay.

Next, in step S12, image data of the maxillary denture is created on the CAD screen based on the acquired scan data of the maxillary denture. As the image data of the maxillary denture, the 3D scan data of the maxillary denture may be used as is, or the 3D scan data of the maxillary denture may be subjected to shape adjustment, etc. Image data may also be used.

Furthermore, in the present disclosure, the 3D scan of the maxillary denture in step S11 is not essential; for example, the manufacturing data of the 3D image used to initially manufacture the existing maxillary denture 10A is It may be used in step S12 instead of scan data.

Next, in step S13, based on the position of the maxillary artificial tooth in the created image data of the maxillary denture, occlusal surface data corresponding to the occlusal surface OS of the maxillary denture are displayed on the CAD screen. Create OS1.

As shown in FIG. 9, the occlusal surface data OS1 can be specifically defined, for example, by using three points at the tip of the maxillary artificial tooth 14. In FIG. 9, denture base data 120 corresponding to the denture base 12 of the maxillary denture, maxillary artificial tooth data 140 corresponding to the maxillary artificial tooth 14, and drawing board data 160 corresponding to the drawing board 16 are shown. Illustrated.

Further, in FIG. 9, a sagittal line AL extending horizontally at the position of the median sagittal plane is illustrated. In addition, in FIG. 9, the definition is defined by using the tip of one of the pair of anterior teeth sandwiching the sagittal line AL and the tips of the left and right first molars in the maxillary artificial tooth data 140. The resulting occlusal surface data OS1 is illustrated. The first molar corresponds to the second molar from the back when the third molar, a so-called wisdom tooth, is not exposed in the oral cavity. Four protrusions are usually formed in one molar. In the definition of occlusal surface OS, the tip of the higher one of the inner projections is often used.

Next, in step S14, image data of the drawing board 16 having the drawing surface 16A parallel to the occlusal surface OS is created based on the created occlusal surface data OS1. Note that in the present disclosure, the drawing surface is not limited to being parallel to the occlusal surface as long as a Gothic arch can be drawn.

Next, in step S15, as shown in FIG. 9, the image data of the created drawing board 16 is connected to the image data of the maxillary denture, thereby creating the image data 100 for designing the maxillary denture. create. A series of steps from step S11 to step S15 described above can constitute the image data creation method for an maxillary denture according to the present embodiment.

<Method for manufacturing maxillary dentures>
Next, a method for manufacturing the maxillary denture according to this embodiment will be described. In step S16 in FIG. 7, image data for manufacturing the maxillary denture is created based on the created image data 100 for designing the maxillary denture.

Next, in step S17, the created manufacturing image data is input to the three-dimensional molding device 60 to mold the maxillary denture 10. That is, the method for manufacturing the maxillary denture according to the present embodiment can be configured by a series of steps from step S11 to step S17, including the method for creating image data for the maxillary denture according to the present embodiment.

In the method for manufacturing an maxillary denture according to this embodiment, the maxillary denture can be integrally molded using resin using the three-dimensional molding device 60. Therefore, compared to, for example, the case where the denture base, denture, and drawing board 16 are each manufactured separately and combined with each other, the manufacturing burden can be reduced and the manufacturing speed can be increased.

<How to create image data of lower jaw denture base>
Next, a method for creating image data of a lower jaw denture base according to this embodiment will be described with reference to FIG. As shown in FIG. 10, first, in step S21, scan data of the lower jaw denture is acquired by scanning the lower jaw denture.

As with upper jaw dentures, the patient's existing lower jaw dentures can be scanned. Also, as in the case of maxillary dentures, in the present disclosure the objects to be scanned are not limited to existing mandibular dentures, such as previously manufactured preliminary mandibular dentures. It may be.

Next, in step S22, image data of the lower jaw denture is created on the CAD screen based on the acquired scan data of the lower jaw denture. As in the case of the maxillary denture, the 3D scan data of the mandibular denture may be used as is as the image data of the mandibular denture, or the 3D scan of the mandibular denture may be used as the image data of the mandibular denture. Image data that has been subjected to shape adjustment or the like may be used.

Further, as in the case of the maxillary denture, in the present disclosure, the 3D scan of the mandibular denture in step S21 is not essential, and may be used, for example, to initially manufacture an existing mandibular denture. The obtained 3D image data may be used in step S22.

Next, in step S22A, image data of the mandibular denture base 22 is created based on the created image data of the mandibular denture base 22. Specifically, for example, image data of a portion corresponding to a mandibular artificial tooth is selected and deleted from the image data of a fixed denture. Then, the shape of the deleted portion in the image data of the denture can be smoothly adjusted. In this step S22A, instead of the image data of the lower jaw denture base 22, image data of the lower jaw denture base 22 may be created. In this case, it is not necessary to delete all of the image data of the portion corresponding to the mandibular artificial teeth, but only a portion of the image data may be deleted. For example, image data corresponding to the molars of the mandibular artificial teeth may be partially deleted.

Next, in step S23, occlusal surface data corresponding to the occlusal surface OS of the lower jaw denture is created on the CAD screen based on the position of the artificial tooth in the created image data of the lower jaw denture. create. The occlusal surface OS can be defined on the mandibular side as well as on the maxillary side, for example, by using three points at the tips of the mandibular artificial teeth.

Next, in step S24, image data of the groove 26 is created based on the created occlusal surface data. For example, image data of the groove 26 can be created by superimposing the image data of the lower jaw denture base 22 on the image data of the lower jaw denture base 22 at the position of the inner wall in the image data of the lower jaw denture base 22 on the CAD screen. In this embodiment, when creating the image data of the groove 26, the direction in which the groove 26 extends is aligned parallel to the occlusal surface data.

Note that in the present disclosure, the direction in which the grooves 26 extend is not limited to being parallel to the occlusal surface OS, but may intersect with the occlusal surface OS. Even if the extending direction of the groove 26 and the occlusal surface OS are not parallel but intersect with each other, it is possible to align the upper surface of the support plate 28 attached to the groove 26 parallel to the occlusal surface OS. Furthermore, even if the upper surface of the support plate 28 and the occlusal surface OS are not parallel but intersect with each other, by adjusting the attachment angle of the drawing needle 29 to the support plate 28, the drawing needle 29 can be moved to the drawing plate 1. It is possible to make it orthogonal to

Next, in step S25, the created image data of the groove 26 is connected to the image data of the lower jaw denture base 22, thereby creating image data for designing a lower jaw denture base having the groove 26. A series of steps from step S21 to step S25 described above can constitute the method for creating image data of a lower jaw denture base according to the present embodiment.

<Mandibular denture base manufacturing method>
Next, a method for manufacturing a lower jaw denture base according to this embodiment will be described. In step S26 in FIG. 10, image data for manufacturing the denture base for the lower jaw is created based on the created image data for designing the denture base for the lower jaw. In addition, in step S26 in FIG. 10, the image data for designing a denture base for the lower jaw may be used instead of the image data for designing the denture base for the lower jaw.

Next, in step S27, the created manufacturing image data is input to the three-dimensional molding device 60 to mold the lower jaw denture base 21. That is, the method for manufacturing a lower jaw denture base according to this embodiment can be configured by a series of steps from step S21 to step S27, including the method for creating image data for a lower jaw denture base according to this embodiment.

Note that in the present disclosure, image data of the support plate 28 may be created without creating image data of the groove 26, and the created image data of the support plate 28 may be connected to the denture base 22 of the lower jaw. By using the image data of the mandibular denture base 22 to which the image data of the support plate 28 is linked as manufacturing image data, it is possible to manufacture the mandibular denture base 22 in which the support plate 28 is integrally molded.

In addition, in the above <Method for creating image data of maxillary denture base>, by adding a step of deleting the image data of the maxillary artificial tooth 14 in the same way as for the mandibular side, a method for creating image data of maxillary denture base. can also be configured.

Furthermore, in the present disclosure, step S22A of deleting the image data of the mandibular artificial tooth in the above-mentioned <Mandibular denture base image data creation method> is not essential. In the present disclosure, a method for creating image data of a mandibular denture may be configured by using image data of a mandibular denture provided with a mandibular artificial tooth, without performing step S22A. By inputting the created image data of the mandibular denture into the three-dimensional molding device 60 as manufacturing image data, the mandibular denture can be manufactured.

Then, using the above <Method for manufacturing maxillary dentures> and <Method for manufacturing mandibular dentures>, the maxillary dentures and mandibular dentures can be attached simultaneously to the maxilla and mandible by the same patient. A dental model set can be constructed in combination with a fixed denture.

<Dental model set>
Next, the dental model set 80 according to this embodiment will be explained. As shown in FIG. 11, the dental model set 80 according to this embodiment includes an upper jaw denture 10 and a lower jaw denture 20.

The maxillary denture 10 includes an maxillary denture base 12 and a drawing plate 16 that is located on the lingual side of the maxillary denture base 12 and spans a pair of opposing inner walls. The lower jaw denture 20 includes a lower jaw denture base 22, a lower jaw artificial tooth 24 provided on the lower jaw denture base 22, and a groove 26.

In the dental model set 80, the molars of the maxillary artificial teeth 14 are arranged in groups created by the molars of the maxillary artificial teeth 14 and the molars of the mandibular artificial teeth 24, which face each other vertically on the left and right sides of the median sagittal plane. The position of the lowest end of is higher than the position of the highest end of the molar tooth of the mandibular artificial tooth 24. The cross-sectional view of FIG. 11 illustrates an upper and lower artificial tooth 14 and a lower artificial tooth 24, which are located on the right side of the median sagittal plane and are opposed to each other in the upper and lower directions.

In this embodiment, the lower region of the four molar teeth of the upper jaw artificial tooth 14 is partially removed, leaving a portion of the upper region. Moreover, in FIG. 11, the outline of the portion where the four molar teeth of the upper jaw artificial tooth 14 have been removed is illustrated by a broken line. Therefore, the lower end of the molar of the upper artificial tooth 14 does not come into contact with the lower end of the molar of the lower artificial tooth 24.

As a result, contact between the tips of the molars of the upper artificial teeth 14 and the tips of the molars of the mandibular artificial teeth 24 is avoided during the limit movement of the lower jaw when drawing a Gothic arch. In particular, during limit movement, the lower jaw tends to move in the vertical direction as well as in the horizontal direction. Therefore, the tip of the molar tooth of the upper artificial tooth 14 and the tip of the molar tooth of the mandibular artificial tooth 24 come into contact, which tends to hinder the limit movement.

In order to manufacture the maxillary denture 10 with molars having partially removed areas, for example, when creating the manufacturing image data in step S16 above, the design of the maxillary denture is The image data 100 may be processed to remove the molar portion within a desired range. Alternatively, processing such as polishing may be performed on the molar portion of the maxillary denture 10 formed in step S17 above.

In addition, although the case where the lower area|region of all four molars of the upper jaw artificial tooth 14 was partially removed was illustrated in this embodiment, this disclosure is not limited to this. In the present disclosure, for example, a region of some of the four molar teeth may be partially removed. That is, the number of molar teeth in which the region to be partially removed is formed is arbitrary.

Moreover, the removal range of molar teeth can be changed as appropriate. That is, for example, all portions of the molars that protrude from the surface of the denture base may be removed. Furthermore, the molars of the mandibular artificial teeth 24 may be removed, or both the maxillary artificial teeth 14 and the mandibular artificial teeth 24 may be removed in a partial region or in their entirety.

That is, by adjusting the protrusion height of the tip of at least one of the maxillary artificial teeth 14 or the mandibular artificial teeth 24, the molars of the maxillary artificial teeth 14 that prevent the limit movement of the mandible when drawing a Gothic arch can be adjusted. It is only necessary to avoid contact between the tip and the tip of the molar tooth of the mandibular artificial tooth 24. Note that in the present disclosure, removal of molar teeth is not essential as long as the limit movement of the lower jaw is not hindered.

Furthermore, in the present disclosure, some or all of the front teeth other than the molars may be removed. Further, the "dental model set" of the present disclosure is not limited to a combination of an upper jaw denture and a lower jaw denture. A combination of a lower denture base without mandibular artificial teeth and a maxillary denture with maxillary artificial teeth is also a combination, and a combination of a maxillary denture base without maxillary artificial teeth and a mandibular denture with mandibular artificial teeth. A combination of these is also included in the "dental model set" of the present disclosure. Furthermore, in the present disclosure, a "dental model set" is configured by a combination of an upper jaw denture base and a lower jaw denture base, and may be used to draw a Gothic arch.

(effect)
In the method for creating image data for an maxillary denture according to the present embodiment, image data 100 for designing an maxillary denture is created on a CAD screen. The created image data 100 for designing a maxillary denture can be used, for example, as image data for manufacturing a maxillary denture. Therefore, a denture that matches the shape of the patient's maxillary ridge can be manufactured without taking an impression of the patient's maxillary ridge, so there is no need for the patient to visit the hospital to take an impression.

Moreover, according to this embodiment, the drawing board 16 has a drawing surface 16A parallel to the occlusal surface OS in the design image data. Therefore, the mounting position of the drawing board 16 can be determined with increased accuracy without having to be determined visually.

Furthermore, in this embodiment, image data of the maxillary denture is created based on scan data of the existing maxillary denture 10A. Therefore, the shape of the maxillary denture to be manufactured matches the shape of the existing maxillary denture 10A. As a result, when a patient wears the manufactured maxillary denture, the patient feels less discomfort.

In addition, in the method for manufacturing an maxillary denture according to the present embodiment, based on the image data 100 for designing an maxillary denture created by the image data creation method for an maxillary denture, Image data for manufacturing dentures is created. Therefore, the maxillary denture 10 that can reduce the burden on the patient can be manufactured.

Furthermore, in the method for creating image data of a lower jaw denture base according to the present embodiment, image data of a lower jaw denture base is created on a CAD screen. The created image data of the lower jaw denture base can be used, for example, as image data for manufacturing the lower jaw denture base. Therefore, a denture base that matches the shape of the mandibular ridge can be manufactured without taking an impression of the patient's mandibular ridge, so there is no need for the patient to visit the hospital to take an impression.

Further, according to the present embodiment, in the design image data, the support plate 28 has an upper surface parallel to the occlusal surface OS. Therefore, the mounting position of the support plate 28 can be determined with increased accuracy without having to be determined visually.

Further, in this embodiment, since the groove 26 extends parallel to the occlusal surface OS, the upper surface of the support plate 28 is aligned parallel to the occlusal surface OS. Therefore, simply by attaching the drawing needle 29 perpendicularly to the upper surface, the drawing needle 29 becomes perpendicular to the occlusal surface OS, so that it is easy to improve the drawing accuracy of the Gothic arch.

Furthermore, in this embodiment, image data of the lower jaw denture base 22 is created based on scan data of the existing lower jaw denture base. Therefore, the shape of the mandibular denture base 22 to be manufactured matches the shape of the denture base of the existing mandibular denture. As a result, when the patient wears the manufactured mandibular denture base 22, the patient feels less discomfort.

Further, in this embodiment, since the groove 26 has a linear shape extending in the front-rear direction, when the support plate 28 is fitted into the groove 26, the support plate 28 can be slid in the front-rear direction. Therefore, the support plate 28 can be easily attached and detached.

Furthermore, in the method for manufacturing a mandibular denture base according to the present embodiment, the image data for manufacturing the mandibular denture base is created based on the image data of the mandibular denture base created by the method for creating image data for the mandibular denture base. Created. Therefore, the lower jaw denture base 21 that can reduce the burden on the patient can be manufactured.

In addition, the maxillary denture 10 according to the present embodiment can provide an maxillary denture 10 that can reduce the burden on the patient.

Moreover, according to the maxillary denture base 10 according to the present embodiment, the maxillary denture base 12, the maxillary artificial tooth 14, and the drawing plate 16 are manufactured separately and joined together. Manufacture of the denture 10 becomes easy.

Further, the lower jaw denture base 21 according to the present embodiment can realize a lower jaw denture base 21 that can reduce the burden on the patient. Further, when the lower jaw denture base 21 without the support plate 28 is attached to the lower jaw as an impression tray for taking an impression of the lower jaw, no structure exists between the pair of inner walls of the denture base. That is, when the mandibular denture base 21 is also used as a tray for taking impressions, the wearer can easily move the tongue located between the inner walls, and the feeling of wearing the denture when taking impressions can be improved.

Further, in the dental model set 80 according to the present embodiment, a group is created by the molars of the upper and lower artificial teeth 14 and the molars of the lower artificial teeth 24 that face each other in the upper and lower directions, respectively, on the left and right sides of the median sagittal plane. Within each group, the position of the lowest end of the molar of the upper artificial tooth 14 is the position of the uppermost end of the molar of the lower artificial tooth 24, or the part of the lower denture base 21 where the molar of the lower artificial tooth 24 is placed. higher than the topmost position. For this reason, when the lower jaw moves back and forth and left and right when drawing a Gothic arch, the molars of the lower artificial teeth 24 or the portion of the lower denture base 21 where the molars of the lower artificial teeth 24 are placed are the same as those of the upper artificial teeth 14. Even if the molars are approached, they can be prevented from coming into contact with each other. As a result, the movement of the lower jaw is less likely to be inhibited, so the accuracy of drawing the Gothic arch can be improved.

Therefore, according to the present embodiment described above, the burden on the edentulous patient can be reduced.

<Other embodiments>
Although the present disclosure has been described with reference to the disclosed embodiments below, the discussion and drawings that form part of this disclosure should not be understood to limit the present disclosure. It should be appreciated that various alternative embodiments, implementations, and operational techniques will be apparent to those skilled in the art from this disclosure.

For example, in the image data creation method according to the present embodiment, the processes in steps S11 to S15 in FIG. 7 and the processes in steps S21 to S25 in FIG. A case where the process is carried out by operating the device 40 is illustrated. However, the present disclosure is not limited thereto.

For example, an image data creation program may be created that causes a computer to execute the processing from step S11 to step S15 or the processing from step S21 to step S25. Then, the created image data creation program causes the image data acquisition device 30 and the design image data creation device 40 to execute the processes of steps S11 to S15 or the processes of steps S21 to S25 to create design image data. Good too.

Further, in the present embodiment, the design image data creation device 40 having a CAD function and the manufacturing image data creation device 50 having a CAM function are exemplified as separate devices, but in the present disclosure, they are integrated. may be configured.

Further, for example, in the present embodiment, a case has been exemplified in which the design image data creation device 40 has a calculation device and the image data creation method is executed by the calculation device, but the present disclosure is not limited to this. In the present disclosure, a server as a computer having a calculation device that executes an image data creation method is provided separately from a design image data creation device, and an image data creation system for, for example, an maxillary denture that is centered around the server is provided. Alternatively, a manufacturing system may be configured.

The server can be connected to all of the image data acquisition device, the design image data creation device, the manufacturing image data creation device, and the three-dimensional molding device 60, and can control the operations of each. For example, by constructing an image data creation system or manufacturing system for maxillary dentures, it is possible to improve the efficiency of a series of operations related to creating image data for maxillary dentures and manufacturing maxillary dentures. become. Moreover, it becomes possible to operate each piece of equipment efficiently.

Furthermore, the present disclosure can be configured by partially combining the configurations illustrated in FIGS. 1 to 11. As described above, the present disclosure includes various embodiments not described above, and the technical scope of the present disclosure is determined only by the matters specifying the invention in the claims that are reasonable from the above explanation. be.

10 Upper jaw denture (upper jaw dental model)
10A Existing maxillary denture base 12 Maxillary denture base (maxillary dental model)
12A Recessed portion 14 Maxillary artificial tooth 16 Drawing plate 16A Drawing surface 20 Lower jaw denture (mandibular dental model)
21 Mandibular denture base (mandibular dental model)
22 Denture base 22A Recess 24 Mandibular artificial tooth 26 Groove 28 Support plate 28A Penetration hole 29 Drawing needle 30 Image data acquisition device 40 Design image data creation device 50 Manufacturing image data creation device 60 Three-dimensional molding device 62 Liquid tank 63 Formation area 64 Liquid resin 66 Build table 68 Hanging member 69 Light irradiation device 70 Support pin 80 Dental model set 100 Design image data 120 Denture base data 160 Drawing board data 140 Maxillary artificial tooth data A Median sagittal plane AL Sagittal line L Left side OS Occlusal surface OS1 Occlusal surface data R Right side FR Anterior side RR Posterior side

Claims (14)

a step of creating image data of the maxillary denture on a CAD screen;
a step of creating occlusal surface data corresponding to the occlusal surface of the maxillary denture on a CAD screen based on the position of the maxillary artificial tooth in the created image data of the maxillary denture;
a step of creating image data of a drawing board based on the created occlusal surface data;
creating image data for designing an maxillary dental model by linking the image data of the created drawing board to the image data of the maxillary denture base or the image data of the maxillary denture base;
A method for creating image data of a dental model of the upper jaw, including: In the step of creating image data of the drawing board,
The drawing board to be created has a drawing surface parallel to the occlusal surface,
The method for creating image data of a dental model of an upper jaw according to claim 1. further comprising the step of obtaining scan data of the maxillary denture by scanning the existing maxillary denture;
In the step of creating image data of the maxillary denture, image data of the maxillary denture is created based on the acquired scan data of the maxillary denture.
The method for creating image data of a dental model of an upper jaw according to claim 1 or 2. An image for manufacturing an maxillary dental model based on image data for designing an maxillary dental model created by the image data creation method for an maxillary dental model according to any one of claims 1 to 3. The process of creating data,
a step of molding a dental model of the upper jaw by inputting the created manufacturing image data into a three-dimensional molding device;
A method for manufacturing a dental model of the upper jaw, including: a step of creating image data of a mandibular denture on a CAD screen;
creating occlusal surface data corresponding to the occlusal surface of the mandibular denture on a CAD screen based on the position of the mandibular artificial tooth in the created image data of the mandibular denture;
Based on the created occlusal surface data, image data of a groove into which a support plate is removably fitted to fix a drawing needle for drawing the locus of movement of the mandible on the drawing board on the maxillary side when drawing the Gothic arch is created. process and
By connecting the image data of the created groove to the image data of the mandibular denture or the image data of the mandibular denture base, grooves are formed in a pair of inner walls located on the tongue side and facing each other. a step of creating image data for designing a dental model of the lower jaw;
A method for creating image data of a dental model of a mandible, including: In the step of creating image data of the groove,
the support plate has an upper surface parallel to the occlusal surface;
The method for creating image data of a dental model of a mandible according to claim 5. In the step of creating image data of the groove, the extending direction of the groove is aligned parallel to the occlusal surface.
The method for creating image data of a dental model of a mandible according to claim 6. further comprising the step of obtaining scan data of the mandibular denture by scanning the existing mandibular denture;
In the step of creating image data of a mandibular denture, image data of a mandibular denture is created based on the obtained scan data of the mandibular denture.
The method for creating image data of a dental model of a lower jaw according to any one of claims 5 to 7. The shape of the groove is linear extending in the front-rear direction.
The method for creating image data of a dental model of a mandible according to any one of claims 5 to 8. An image for manufacturing a dental model of a mandible based on image data for designing a dental model of a mandible created by the image data creation method for a dental model of a mandible according to any one of claims 5 to 9. The process of creating data,
a step of molding a dental model of the lower jaw by inputting the created manufacturing image data into a three-dimensional molding device;
A method for manufacturing a dental model of a mandible, including: maxillary denture base,
Maxillary artificial teeth installed on the maxillary denture base,
a drawing board made of at least one of an acrylic resin and a methacrylic resin, which is spanned between a pair of inner walls facing each other and located on the lingual side of the maxillary denture base;
Maxillary denture with . The maxillary denture base, the maxillary artificial tooth, and the drawing plate are integrally molded,
The maxillary denture according to claim 11. lower jaw denture base,
a groove in which a support plate is removably fitted, which is provided in a pair of inner walls facing each other and located on the lingual side of the denture base of the lower jaw, and fixes a writing needle that draws a Gothic arch on the writing plate;
has, or
lower jaw denture,
a groove in which a support plate is removably fitted, which is provided in a pair of inner walls facing each other and located on the lingual side of a mandibular denture, and which fixes a writing needle that draws a Gothic arch on a writing plate;
Dental model of the lower jaw. An upper jaw having a maxillary denture base, an maxillary artificial tooth provided on the maxillary denture base, and a drawing board spanning a pair of inner walls facing each other and located on the lingual side of the maxillary denture base. dentures and
A mandibular denture base, a mandibular artificial tooth provided on the mandibular denture base, and a drawing needle that draws a Gothic arch on a drawing board provided on a pair of inner walls facing each other and located on the lingual side of the mandibular denture base. a lower jaw denture having a groove into which a support plate for fixing the support plate is removably fitted;
Within the group created by the molars of the maxillary artificial teeth and the molars of the mandibular artificial teeth that face each other vertically on the left and right sides of the midsagittal plane, the position of the lowest end of the molars of the maxillary artificial teeth is higher than the position of the uppermost edge of the molar teeth of
Or
An upper jaw having a maxillary denture base, an maxillary artificial tooth provided on the maxillary denture base, and a drawing board spanning a pair of inner walls facing each other and located on the lingual side of the maxillary denture base. dentures and
a lower jaw denture base and a groove in which a support plate is removably fitted, which is provided on a pair of inner walls located on the lingual side and facing each other in the lower jaw denture base, and fixes a writing needle that draws a Gothic arch on a writing plate; a mandibular denture base having;
Dental model set.