KR101862820B1 - method for manufacturing denture - Google Patents

Abstract

The present invention relates to a denture manufacturing method for enhancing the precision of dentures by obtaining accurate images of the oral cavity of a treatment target. According to the present invention, the denture manufacturing method includes: a first step of inserting a dental traction device, including a traction base elastically deformed in a manner corresponding to an arc-shaped cross-sectional profile on one or more side of gum parts on the upper and lower mandibular limbs of the treatment target, into the oral cavity and pulling and pressing the soft tissue in the oral cavity to expose the overall outer surface of the interior and exterior parts of the gum part; a second step of loading oral cavity scanning images obtained from the gum part having the outer surface of the interior and exterior parts exposed overall by pulling and pressing the soft tissues and extracting one virtual dental sequence template corresponding to the dental arch line of the treatment target from a digital library; a third step of aligning and arranging individual dental images including the extracted virtual dental sequence template to correspond to the dental arch line of the treatment target; and a fourth step of designing and manufacturing the dentures on a three-dimensional basis to include an artificial gum part meshing with the oral cavity of the treatment target and artificial tooth units protruding to the outside from the artificial gum part based on the individual dental images aligned and arranged in advance and the outer surface shape of the gum part.

Description

{Method for manufacturing denture}

The present invention relates to a method of manufacturing a denture, and more particularly, to a method of manufacturing a denture in which the image of the inside of the mouth of a client is accurately acquired and the precision of the denture is improved.

In general, dentures, also called dentures, are artificial implants that artificially restore the shape and function of missing teeth when natural teeth are missing.

In detail, when the natural tooth is left in a state of being lost, the facial shape is deformed due to the dental arch distortion of the adjacent tooth and the opposed tooth of the missing tooth, and the chewing function is deteriorated and the inconvenience to daily life is increased. Furthermore, when the loss state of the natural teeth is maintained for a long period of time, the alveolar bone surrounding the lost teeth is absorbed into the body, making it difficult to install the prosthesis.

The denture is provided in the oral cavity in consideration of the aesthetic satisfaction of the patient along with the masticatory function. The denture is divided into a partial denture or a complete denture according to the number of missing teeth. Depending on the method of being fixed in the oral cavity, .

At this time, the denture, particularly the complete denture, may be installed in the oral cavity of a edentulous or partial edentulous patient in which teeth of at least one of the maxillary and mandibles are largely lost. In detail, the denture includes an artificial tooth part to replace a tooth to be installed, and an artificial tooth part to replace a missing tooth, and is manufactured individually corresponding to the shape and height of teeth different from patient to patient, And is made according to the model.

In detail, a conventional denture is manufactured by the following process. First, a tray or a wax, which is harmless to the human body, is filled in the tray selected to fit the tooth shape along the alveolar bone. Then, a tray filled with the resin or wax is installed inside the patient's mouth to make an impression, and a model for the artificial gum is formed based on the obtained impression.

On the other hand, the paraffin is attached to the upper surface of the artificial gum part corresponding to the tooth missing part with a predetermined thickness and is installed inside the oral cavity of the patient, and the thickness of the paraffin is adjusted according to the patient's sensitivity The height of the artificial abdomen is set.

Subsequently, when the first denture model corresponding to the model and the height of the artificial abdomen is manufactured corresponding to the artificial gingival section, it can be finely adjusted to a height at which the artificial gingiva can be comfortably felt by being reinstalled inside the oral cavity of the patient. The denture is fabricated on the basis of a first denture model.

However, such a conventional denture manufacturing method is practically performed on the side of a practitioner such as a dentist, while the measurement and adjustment of the inside of the patient's mouth is performed, but the direct preparation of the denture is performed on the side of the manufacturer, such as a toothbrush. Thus, the workpieces produced at each step are repeatedly crossed to the operator side and the manufacturer side. Further, in order to judge whether the workpiece or the denture was manufactured appropriately in the oral cavity, the patient was repeatedly visited to determine whether the inside of the patient's mouth was suitable for the operator's side, and the oral cavity was adjusted by installing it directly in the oral cavity. Therefore, it takes a long time to manufacture the denture, and the inconvenience caused by frequent visits of the patient to the practitioner is increased.

Accordingly, a technique for designing and manufacturing the denture based on an image obtained by scanning the oral cavity of a patient with an oral scanner has been partially disclosed. However, there is a problem that the accuracy of image information about the inside of the oral cavity is lowered as it is included in the scanning image acquired by the fluidity of the soft tissue such as the tongue or the ball mucous membrane in the oral cavity. As a result, the denture designed and manufactured on the basis of the incorrect image information is incompatible with the inside of the patient's mouth, complicating the patient's discomfort, and the denture being re-manufactured.

Korea Patent No. 10-0403834

In order to solve the above problems, the present invention provides a method of manufacturing a denture in which an image of an inside of a mouth of a client is accurately acquired and precision of the denture is improved.

According to an aspect of the present invention, there is provided a dental traction device having a traction base portion elastically deformed corresponding to an arcuate cross-sectional profile of at least one of the upper and lower gums of a subject, A first step of pulling the soft tissue inside the oral cavity so that the entire outer surface of the oral cavity is exposed; A second step of loading the acquired oral scanning image with respect to the gingival section where the soft tissues are entirely exposed to the inner and outer outer surfaces, and extracting one virtual dental template corresponding to the dental arch line of the subject from the digital library; A third step in which each tooth image included in the extracted one virtual dental thermal template is aligned and arranged corresponding to a dental arch line of the subject; And a denture including an artificial gingival portion formed inside the oral cavity of the subject and an artificial tooth portion protruding outward of the artificial gingival portion based on the outer shape of the gingival portion and the tooth images aligned and arranged, are three-dimensionally designed and manufactured Wherein the virtual dental thermogram template includes information on successive virtual dentition lines of each tooth image, wherein the virtual dentition template includes information on a plurality of teeth corresponding to the dental arch line and the virtual dentition line of the subject, Wherein each tooth image is corrected based on the tooth arch line in which the virtual tooth line is aligned and superimposed with reference to the matching area, The height is adjusted based on the occlusal height calculated on the oral scanning image, The writing surface shape, the arrangement position and the angle based on the outer surface profile of the opposing teeth which value provides a denture manufacturing method characterized by the regulated.

In the first step, the gum portion is accommodated in a receiving space formed corresponding to an arcuate cross-sectional profile of the gum portion at a central portion of the pulling base portion, so that the soft tissue including the tongue is pulled apart from the gum portion Wherein the pulling base portion is pressed toward the lower end portion of the gum portion to expose the entire outer shape of the gum portion while both ends of the pulling base portion are elastically deformed corresponding to the sectional profile of the gum portion when the gum portion is pressed toward the lower end portion, The distance between the inner circumferential surface of the pulling base portion and the inner and outer side portions of the gum portion is preferably adjusted.

In the second step, a CT image obtained by performing a CT scan on the upper and lower mandibles of the subject is obtained, and the oral scanning image is preliminarily corrected corresponding to the dental arch line of the subject on the basis of the CT image .

Meanwhile, in the second step, the digital library includes three-dimensional outer shape information of a plurality of virtual dental thermal templates having a dental arch line, an occlusal height, and an arrangement position of teeth as a selection item, It is preferable to set the distance based on the calculated vertical spacing of the upper and lower males according to the optimized authoring sensitivity of the subject.

Further, in the second step, it is preferable that the virtual tooth template further includes a face image of the opposing tooth standardized in correspondence with the selection item.

Through the above solution, the denture manufacturing method according to the present invention provides the following effects.

First, the oral scanning image is acquired with the entire outer surface of the gingival portion being clearly exposed using a dental traction device that simultaneously pulls soft tissues such as the tongue and the ball mucosa, and the accuracy of the information contained therein is significantly improved. The installation accuracy and dent reliability of the denture designed and manufactured can be remarkably improved.

Second, one virtual dental template that is matched most closely to the oral condition of the subject of the virtual dental template among the plurality of virtual dental templates that are subdivided according to the standardized selection information is extracted according to the individual deviation, so that the actual automatic matching It is possible to provide the base technology that can be implemented, so that the design convenience in manufacturing the denture can be remarkably improved.

Third, the selection information such as the dental arch line and the occlusal height can be accurately calculated from the outer surface shape of the gingival portion having the entirely exposed outer surface. If such selection information is input to the digital library, the one virtual dental template can be easily And is aligned and matched with the outer surface shape of the gingiva portion, the image correction process and the time for the denture design can be remarkably shortened and the manufacturing can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow diagram illustrating a method of manufacturing a denture according to one embodiment of the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a denture pulling apparatus for use in a method of manufacturing a denture according to an embodiment of the present invention.
FIG. 3 is an exemplary view showing a use state of a dental traction apparatus in a denture manufacturing method according to an embodiment of the present invention; FIG.
4 is a view illustrating a state in which a virtual teeth template is placed on an oral scanning image in a method of manufacturing a denture according to an embodiment of the present invention.
5A and 5B are views illustrating an example of application of a virtual dental thermal template in a denture manufacturing method according to an embodiment of the present invention.
6 is a view illustrating a design state of a denture in a denture manufacturing method according to an embodiment of the present invention.
FIG. 7 is a cross-sectional view illustrating a state where a denture manufactured according to an embodiment of the present invention is installed inside an oral cavity. FIG.

Hereinafter, a method of manufacturing a denture according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating a method of manufacturing a denture according to an embodiment of the present invention. FIG. 2 is a view illustrating a dental traction apparatus used in a method of manufacturing a denture according to an embodiment of the present invention. FIG. 3 is a sectional view showing the use of a dental traction apparatus in a denture manufacturing method according to an embodiment of the present invention. Fig. 4A and 4B are views showing a state in which a virtual dental template is disposed on an oral scanning image in a denture manufacturing method according to an embodiment of the present invention. Fig. 8 is a diagram illustrating an example of application of a virtual dental template in the method of Fig. 6 is a view illustrating a design state of the denture in the denture manufacturing method according to an embodiment of the present invention, and FIG. 7 is a cross-sectional view illustrating a state in which the denture manufactured in accordance with the embodiment of the present invention is installed in the oral cavity Fig.

As shown in FIGS. 1 to 7, the denture manufacturing method according to the present invention is performed as follows. Here, in the present invention, a complete denture is provided inside the mouth of a patient who is either edentulous or both edentulous of the upper and lower mandible. However, the denture manufacturing method according to the present invention is also applied to the manufacture of the partial denture .

First, a dental traction device 300 having a pulling base 310 elastically deformed corresponding to an arcuate cross-sectional profile of at least one of the gingival parts 1 of the upper and lower mandibles of the subject is inserted into the oral cavity. When the gum part 1 is accommodated in the accommodation space 313 formed in the pulling base part 310, the soft tissue inside the oral cavity is pulled by pressure so that the entire outer surface of the inside and outside of the gum part 1 is exposed (s10).

2 to 3, the pulling base 310 has a receiving space 313 corresponding to an arcuate cross-sectional profile of the gum 1 at a central portion thereof. That is, the pulling base portion 310 is inserted into the oral cavity, and is arranged to receive the gingival portion 1 inside the accommodation space 313. When a pushing force is applied to the inside of the mouth while the practitioner grasps the grip 320 extending to the outside of the pulling base 310, the pulling base 310 is moved to the lower end of the gum 1 1c so as to expose the entire outer surface shape of the gum portion 1. [

It should be understood that a dotted line inside the pulling base 310 schematically represents the overall outer profile of the gum 1. In this case, the gum portion 10 is preferably a gum portion to which the denture is to be attached. It is preferable that the upper end portion of the gingival section 1 to be described later be understood to be an alveolar portion and the lower end portion 1c of the gingival section 1 is preferably an opposite side of the alveolar portion. The outer side 1b of the gum part 1 to be described later corresponds to the labial and buccal sides of the oral cavity and the inner side 1a of the gum part 1 is a lingual side it is desirable to understand the part corresponding to the lingual.

At this time, the pulling base portion 310 is provided with a pulling portion spaced apart from at least one of the inner and outer side portions 1a and 1b of the gum portion 1 corresponding to the soft tissue inside the oral cavity .

In particular, the pulling base 310 includes an outer pulling portion 312 of an arcuate profile that wraps around the lateral portion 1b of the gingival section 1. And an inner pulling portion 311 extending integrally from both ends of the outer pulling portion 312 and having an arcuate profile surrounding the inner portion 1a of the gum portion 1. [

The receiving space 313 is formed so that the inner circumferential surfaces 311a and 312a of the inner pulling portion 311 and the outer pulling portion 312 are aligned with the inner and outer portions 1a and 1b of the gum 1 (G1, g2) that can be spaced apart from each other. Therefore, the cross-sectional area of the accommodation space 313 may be substantially larger than the cross-sectional profile of the gum portion 1. [ The soft tissue inside the oral cavity adjacent to the gingival section 1, such as the ball mucosa and the tongue, is received by the outer pulling portion 312 and the inner pulling portion 312, And can be pulled apart while being in contact with the outer peripheral surfaces 311b and 312b of the portion 311.

Particularly, the foreign tooth pulling portion 311 is formed to correspond to the profile of the inner portion 1a of the gum 1, so that the pressing and restricting portion 315 having a concave shape is formed on the outer peripheral surface side. Accordingly, since the tongue 3 is received and constrained in the pressurized and restrained portion 315, the flow is prevented, so that the clarity of the outer surface shape of the gum portion included in the oral scanning image can be further improved. In addition, since the pressure restricting portion 315 substantially corresponds to the sectional profile of the tongue 3, the discomfort of the subject can be minimized even if the soft tissue is pulled by the dental pulling device 300.

Both ends of the outer pulling part 312 and the inner pulling part 311 are integrally connected to each other by the variable connection part 314. In detail, the variable connection portion 314 is roundly connected to surround the distal side 1d of the gum portion 1, that is, the outer side of the posterior triangle, and corresponds to the sectional profile of the gum portion 1 by a pressing force And can be elastically deformed.

That is, when the pulling base portion 310 is pressed toward the lower end portion 1c of the gum portion 1, the variable connection portion 314 integrally formed at both ends of the pulling base portion 310 is inserted into the gum portion 1 In accordance with the cross-sectional profile. Accordingly, the gap between the outer pulling portion 312 and the inner pulling portion 311 is adjusted corresponding to the bending from the mesial side to the distal side (1d) of the inside of the mouth while the soft tissue is pressed and restrained have. Accordingly, since the size of the pulling base 310 is easily deformed in response to the individual variation of the subject, the pulling force of the soft tissue can be improved while the utilization convenience is remarkably improved.

When the pulling base portion 310 is inserted into the oral cavity and the gum portion 1 is accommodated in the receiving space 313, the pulling base portion 310 is recessed in the outer peripheral surface 311b of the inner pulling portion 311 The outer surface of the tongue 3 is tightly restrained to the pressurizing and restricting portion 315 formed therein and is pulled and restrained to the centrifugal side inside the oral cavity. At the same time, as the ball mucosa inside the oral cavity is pulled outwardly toward the outer circumferential surface 312b of the outer pulling portion 312, the ball mucosa is separated from the outer side 1b of the gum portion 1. Thus, the soft tissue adjacent to the gum 1 may be spaced apart from the inner and outer portions 1a and 1b of the gum 1 while simultaneously being pulled back to the dental traction device 300. Thereby, a sufficient space for moving the oral scanner (s) can be secured in the oral cavity, and the flow of the soft tissue is substantially restricted even if the tongue or mouth is unconsciously moved, so that the scanning It is possible to prevent the path from being deviated.

In addition, since the tongue and the ball mucous membrane are substantially spaced from the inner and outer portions 1a and 1b of the gum 1, the entire outer surface of the gum 1 can be more clearly exposed. Therefore, the practitioner can visually and clearly recognize the inside of the wearer's mouth, thereby enabling accurate acquisition of the oral-scanning image using the oral-type scanner (s), and reliability of the acquired oral-scanning image can be remarkably improved. Through this, the accuracy and precision of the dentures designed and manufactured based on the oral scanning image can be significantly improved.

Further, the dental pulling apparatus 300 can simultaneously pull and tie the tongue and ball mucous membrane, which are different in the pulling direction, from each other so as to be opposed to the inner and outer side portions 1a and 1b of the gum unit 1, Therefore, the operability of the operator can be remarkably improved. In addition, in the internal environment of the oral cavity where the amount of soft tissues is large, such as edentulous or partial edentulous with most of teeth disappeared, the pulling base portion 310 fixes the lower end portion 1c of the gum portion 1 while pressing it, The oral scanning image with respect to the outer shape of the portion 1 can be obtained more clearly.

Of course, depending on the case, the pulling base portion may include the outer pull portion for pulling the outer side of the gum portion and the one end portion of the variable connection portion, and may be provided in a shape substantially opened to the inside of the oral cavity. That is, in the case of the maxilla, the ball mucosa from the mesial side to the distal side of the inside of the oral cavity is pulled outward by the outer pulling portion and the variable connecting portion, and the mouth scanning image includes an image of the mouth . ≪ / RTI > Accordingly, the artificial gingle portion, which will be described later, can be designed and manufactured to have an area corresponding to the palatal space at the time of manufacturing the maxillary denture so that the durability can be improved. In addition, since the images of the palate are more clearly displayed, the fit of the dentures and the inside of the mouth manufactured based on the images is improved, so that convenience of installation and inconvenience of the patient can be minimized.

The dental pulling apparatus 300 includes a wire 310a formed of a flexible metal material capable of being elastically deformed by an external force and an outer skin 310b of a synthetic resin material surrounding the wire 310a, ) May be included. Therefore, the wire 310a is elastically deformed corresponding to the bending of the inside of the mouth, thereby restraining the soft tissue stably while minimizing discomfort as the outer skin 310b contacts the internal oral tissue . In addition, scattering of light by the wire 310a, which is made of a metal material, in the scanning process is prevented, and the accuracy of the oral scanning image can be further improved.

In addition, the handle 320 is extended to the outside of the pulling base 310, and the handle 320 is eccentrically disposed to the left or right of the pulling base 310. Accordingly, the space in which the dental instruments such as the oral scanner (s) can be drawn into the other side of the handle portion 320 is formed to be relatively large, and the handling radius is enlarged, so that the convenience of operation can be remarkably improved.

In addition, the scanning operation can be performed stably as the handle 320 extends outward in the diagonal direction of the pulling base 310 corresponding to the natural radius of motion of both arms of the practitioner. Therefore, by minimizing the image distortion of the oral scanning image, the reliability of the information contained in the oral scanning image can be significantly improved, and the accuracy of the denture manufactured based thereon can be significantly improved.

On the other hand, the soft tissue is pressed and pulled to acquire the oral scanning image 110 with respect to the gingiva in which the outer surface of the inner and outer portion is entirely exposed. Then, the acquired oral scanning image 110 is loaded, and one virtual dental template 20 corresponding to the dental arch line 111a of the subject's physician is extracted from the digital library (s20). Subsequently, each tooth image 21 included in the extracted one virtual dental thermal template 20 is aligned and arranged corresponding to the dental arch line 111a of the subject's person (s30).

2 and 6, the oral scanning image 110 includes an overall outer shape 111 including an upper end portion, inner and outer portions 1a and 1b and a lower end portion 1c of the gum portion 1, It is displayed as a three-dimensional image. In addition, information on the dental arch line 111a of the subject can be obtained along the upper end profile of the gingival section 1.

The digital library includes a plurality of pieces of digital appearance information for the virtual dental template 20 in which tooth images 21 for either one of the maxilla or mandible are arranged corresponding to predetermined virtual dental row lines 21a do.

At this time, the digital outer shape information of the virtual dental thermal template 20 refers to three-dimensional vector data that can be reproduced in correspondence with the outer shape and structure of the artificial abdomen (81 in FIG. 7) of the denture (80 in FIG. 7) It is desirable to understand what it means. That is, each tooth image 21 included in the virtual dental template 20 can be converted into design information of the denture (80 in FIG. 7) in association with the manufacturing system. Accordingly, when one virtual dental template 20 is selected, the overall shape of the artificial abdomen (81 of FIG. 7) can be designed and manufactured quickly and precisely without any specific design or measurement work.

Here, the virtual dental thermogram template 20 may be subdivided and stored in the digital library based on each selection item. In detail, the virtual dental template 20 is classified by calculating and selecting a standardized average value for dental arch line, an occlusal height and an arrangement position of teeth according to sex and age, and can be stored in the digital library in a plurality . In addition, the virtual dental template 20 can be further subdivided by calculating and selecting a standardized average value of the tooth installation angles.

In this case, the occlusal vertical dimension (VD) is set on the basis of the vertically spaced intervals of the upper and lower teeth calculated based on the optimized grip sensitivity at the time of occlusion of the subject, Can be calculated.

In detail, a bite guide member such as a tray or an occlusal resin may be installed inside the oral cavity of the subject to be positioned such that the upper and lower teeth correspond to the occlusal height. Then, the inside of the oral cavity in which the occlusion guide member is installed and in which the occlusion height is considered by scanning the inside of the oral cavity or CT photographing can be obtained.

At this time, the occlusion guide member is provided in the occlusion space formed between the upper and lower mandibles, and the interval between the upper and lower portions is adjusted corresponding to the occlusion height as the occlusion guide member is pressed or cut depending on the sensitivity of the subject. Such writing sensitivity can be judged by the direct expression of the physician and, in some cases, judged by measuring electrical and chemical signals of the jaw joint and jaw muscles.

Therefore, the oral internal image acquired with the occlusion guide member installed in the occlusion state may include the external shape information of the upper and lower malalignments spaced apart corresponding to the occlusion height. Then, the occlusion height can be easily calculated from the image information of the upper and lower outer surface shape.

At this time, when the upper and lower mandibles are edentulous, the occlusion height VD1 can be calculated from the vertical spacing distance between the upper end portions of the gingiva portions 111 and 121 of the upper and lower malalgia as shown in FIG. 5A. 5B, when the occlusal height VD2 is determined from the vertical distance between the upper end of the gingival portion outer surface 111 of the edentulous side and the end of the opposing tooth t, Can be calculated.

Namely, numerical values of the occlusion heights (VD1, VD2) can be easily obtained from the image of the inside of the mouth obtained with the occlusion heights (VD1, VD2) according to the author's sensitivity optimized for the physician being taken into consideration. Accordingly, one virtual dental template 20a, 20b with a minimized matching error with the oral cavity of the subject can be selected and extracted as the actual occlusal heights VD1, VD2 of the subject are input as a selection item. Accordingly, since the interlocking reliability between the artificial abdomen (81 in Fig. 7) designed to be manufactured and the artificial teeth based on the virtual dental template (20a, 20b) and the opposing teeth is improved, accuracy and precision Can be significantly improved.

Of course, the occlusion height may be set virtually through the simulation program by extracting the virtual tooth template extracted corresponding to the selection item. That is, the virtual dental template extracted by designating the gender and age-based dental arch line and the arrangement position of the teeth of the subject to be examined as a selection item can be arranged virtually on the oral scanning image. The images of the upper and lower teeth included in the virtual dental template may be applied to the virtual articulator included in the simulation program so that the height of each tooth image corresponds to the occlusal height.

When a selection item such as a dental arch line and an occlusal height obtained with respect to the interior of the subject's mouth is input to the digital library, one virtual dental template 20 matching the oral condition of the subject is selected . As a result, one virtual dental template 20 having a minimized matching error with the dental arch line and the occlusion height of the subject can be quickly and easily extracted, so that the subsequent image correction operation can be simplified. Since the outer surface shape 111 of the gum part included in the oral scanning image 110 and the mutually matching part of the virtual dental thermal template 20 are easily calculated, The templates 20 may be automatically arranged and arranged.

At this time, the virtual dental template 20 further includes information on the virtual dental row 21a continuous to each tooth image 21. As each tooth image 21 of the virtual dental template 20 is matched with the dental arch line 111a corresponding to the dentist's arch line 111a and the virtual dental arch line 21a are matched with each other, .

In detail, referring to FIG. 4, matching areas m1 and m2 corresponding to the dental arch line 111a and the virtual dental row 21a of the physician are respectively set. At this time, the matching areas m1 and m2 may be set by equally dividing each line 111a and 21a at predetermined intervals, and the arrangement center point of each tooth may be set as the matching area m1 and m2. Furthermore, the matching areas m1 and m2 may be set to a plurality of points on the lines 111a and 21a, respectively, and may be set to be a line or a plane depending on the case.

The virtual dentition line 21a may be corrected so that the matching areas m1 and m2 are aligned and overlapped with respect to the dental arch line 111a. Accordingly, the teeth images 21 included in the virtual dental template 20 can be arranged in an array corresponding to the actual dental arch line 111a of the subject.

Meanwhile, the virtual tooth template 20 may further include a standard tooth image corresponding to the selected item.

5A, the virtual tooth template 20a includes the tooth image 23 of the opposed tooth together with tooth images 21 corresponding to the outer surface shape 111 of the gingival portion to be dentified . At this time, the opposed tooth image 23 may be arranged in correspondence with a predetermined virtual opponent tooth line in which the tooth images 21 and the occlusion height VD1 are taken into consideration, and are fictitiously arranged. In addition, the oral-scanning image 110 may further include a contour-side scanning image 120a including an opposing-gingival-section outer surface shape 121. [

That is, when the virtual dental template 20a is extracted, the virtual dentition lines for the tooth images 21 may be arranged in an array corresponding to the dental arch line of the outer shape 111 of the gingiva. The virtual opposed tooth line for the opposed tooth image 23 may be arranged in an array corresponding to the dental arch line of the opposed-side gingival portion outer surface shape 121.

Furthermore, the virtual dental template 20a can be extracted by virtually arranging the teeth image 21 and the tooth image 23 of the teeth in a state where the occlusion height VD1 is already taken into consideration. Therefore, when the teeth image 21 and the tooth image 23 of the teeth of the teeth are aligned and arranged in correspondence with the tooth arch lines of the upper and lower teeth, The shape of the artificial abdomen (81 in Fig. 7) can be designed through the shape of the chewing surface of each tooth image 21. As a result, the reliability of the denture (80 in Fig. 7) designed and manufactured from the oral scanning image 110 is improved, and functional and aesthetic satisfaction can be significantly improved when the dentist is installed inside the oral cavity.

Further, the time required for designing and manufacturing the denture (80 in Fig. 7) can be remarkably shortened, and even when the upper and lower jaws are both edentulous, the denture can be substantially simultaneously performed to the upper and lower jaws. Can be significantly improved.

Of course, as shown in FIG. 5B, in some cases, the opposed tooth image may be provided from the opposed scanning image 120b obtained by scanning the inside of the subject's mouth.

That is, when at least one of the maxilla and mandible is edentulous and the natural tooth remains on the mating side or the denture is manufactured, the mating side is scanned to obtain the artificial abdomen (81 of FIG. 8) may be provided.

At this time, the tooth images 21 included in the virtual dental template 20b may be aligned and arranged corresponding to the dental arch line corresponding to the outer shape 111 of the gingival section. Here, the height of each tooth image 21 may be adjusted based on an occlusal height VD2 corresponding to a vertical separation distance between an upper end of the gum portion and an end portion of the opposed tooth. Further, the shape of the chewing surface and the arrangement position can be set based on the end image of the opposing tooth t displayed on the confrontation-side scanning image 120b.

Furthermore, a CT image of the upper and lower mandibles of the subject can be acquired so that the reliability of the information included in the oral scanning image 110 is improved.

In more detail, the oral-scanning image 110 is displayed as image information in a state in which image information continuously captured by the oral scanner s moved within the oral cavity of the subject is combined. As a result, the dentition curvature or the like displayed on the image may appear distorted inside the oral cavity of the actual subject. Accordingly, accurate image information for designing the denture can be provided as the distortion of the image is corrected based on the accurate dentition curvature included in the CT image.

On the other hand, the denture 80 is three-dimensionally designed and manufactured based on the outer shape 111 of the gingival portion and the tooth images 21 arranged and arranged. Here, the dent 80 includes the artificial gum 82 and the artificial abdomen 81 protruding outward from the artificial gum 82 in the mouth cavity of the subject.

4 to 7, the artificial abutment 81 is designed on the basis of each tooth image 21 arranged in alignment with the oral scanning image 110.

At this time, the height of each tooth image 21 can be adjusted based on the occlusion heights (VD1, VD2) calculated on the oral scanning image 110. In addition, each of the tooth images 21 can be adjusted in shape, arrangement position and angle based on the outer surface profile of the opposing tooth arranged on the opposite side in consideration of the occlusion heights VD1 and VD2. Therefore, when the denture 80 manufactured on the basis of the denture 80 is installed inside the oral cavity of the subject, it is possible to improve the relieving reliability of the denture 80 with the opposed tooth.

The artificial gum portion 82 is designed based on the external shape 111 of the gum portion displayed on the oral scanning image 110. In detail, the area surface of the predetermined area may be set in the outer shape 111 of the gingival section. Here, the area surface may be set by designating an arbitrary area with the boundary of the lower end profile of the gum part as a boundary, or the area surface may be automatically calculated and set in the simulation device.

If the area surface protrudes outward to a predetermined thickness, the design information (22) on the artificial gingival section whose area surface corresponds to the fixed groove section can be obtained. At this time, the design information 22 for the artificial gingiva can be formed such that the inner surface is formed with the outer surface shape 111 of the gingival section, and the outer surface is overlapped with the lower end of each tooth image 21 arranged and arranged.

That is, the artificial abdomen 81 is set on the basis of the selected item and the external information on the contour tooth image, and the artificial gum part 82 is set based on the external shape 111 of the gum part It can be designed in an optimized state corresponding to the internal environment of the mouth of the client. Therefore, the denture 80 manufactured on the basis of the above-mentioned denture 80 is formed by the fixing groove portion 82a formed on the inner surface of the artificial gingival section 82 to be precisely fitted to the gingival section 1, The interlocking reliability between teeth can be remarkably improved. Thus, functional and aesthetic satisfaction can be significantly improved when the dentist installs the denture 80.

Meanwhile, the denture designed from the oral scanning image may be three-dimensionally printed to be made of the denture or a mold for denture production. The denture thus manufactured may be detachably installed in the oral cavity using a fixing means such as an attachment.

Accordingly, the method of manufacturing a denture according to the present invention is characterized in that the entire outer surface of the gingival section 1 is clearly exposed using the dental pulling apparatus 300 inserted into the oral cavity and simultaneously pulling soft tissues such as the tongue and the ball mucous membrane The oral scanning image 110 may be acquired. Therefore, since the precision of the oral scanning image 110 is remarkably improved, the installation accuracy and the authoring reliability of the denture 80 designed and manufactured can be remarkably improved.

In addition, one virtual dental template (20, 20a, 20b) which is matched most closely to the oral internal condition of the subject is subtracted from a plurality of virtual dental template based on standardized selection information according to individual deviation, Image 110, as shown in FIG. Accordingly, it is possible to provide an underlying technology capable of realizing substantially automatic matching between the one virtual dental template (20, 20a, 20b) and the outer surface shape (111) of the gingival section, Can be significantly improved.

Further, the selection information such as the dental arch line 111a and the occlusal heights VD1 and VD2 of the subject's wearer can be accurately calculated from the gingiva outer surface shape 111 in which the entire outer surface is clearly exposed. Therefore, as long as such selection information is input to the digital library, the one virtual dental thermal template 20, 20a, 20b is easily extracted and aligned and matched with the outer surface shape 111 of the gingival section, The process and time can be remarkably shortened.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And such modifications are within the scope of the present invention.

1: gingival section 20: virtual teeth template
21a: Virtual teeth line 80: False teeth
81: artificial abdomen 82: artificial gingiva
82a: Fixing groove part 110: Oral scanning image
111a: Dental arch line 300: Dental traction device
310: Traction base section s: Oral scanner

Claims (5)

A dental pulling device having a pulling base portion elastically deformed corresponding to an arcuate cross-sectional profile of at least one of the gingival portions of the upper and lower mandibles of the subject is inserted into the oral cavity to soften the soft tissues inside the oral cavity such that the entire outer surface of the inside of the oral cavity is exposed. A first step in which the traction is pressed;
A second step of loading the acquired oral scanning image with respect to the gingival portion to which the soft tissue is entirely exposed, and extracting one virtual dental template corresponding to the dental arch line of the subject from the digital library;
A third step in which each tooth image included in the extracted one virtual dental thermal template is aligned and arranged corresponding to the dental arch line of the subject; And
The denture including an artificial gingival portion formed inside the oral cavity of the subject and an artificial tooth portion protruding outward of the artificial gingival portion based on the outer shape of the gingival portion and each tooth image arranged and arranged, Including four steps,
In the third step, the virtual dental template includes information on successive virtual dental series lines of the tooth images, and a matching area corresponding to the dental arch line and the virtual dental series line of the subject are set respectively And the virtual dentition lines are corrected based on the dental arch line aligned and superimposed with respect to the matching area,
In the fourth step, the height of each tooth image is adjusted on the basis of the occlusal height calculated on the oral scanning image, and based on the outer profile of the opposed tooth arranged on the opposite side in consideration of the occlusion height, , The arrangement position and the angle are adjusted. The method according to claim 1,
The method comprising the steps of: receiving the gingival portion in a receiving space formed corresponding to an arcuate cross-sectional profile of the gingival portion at a central portion of the pulling base portion in the first step; And pressing the base portion toward the lower end of the gum to expose the entire outer shape of the gum,
Wherein both ends of the pulling base portion are elastically deformed corresponding to the cross-sectional profile of the gingival section when the lower end of the gingival section is pressed, thereby adjusting the gap between the inner circumferential surface of the pulling base section and the inner and outer sides of the gingival section. The method according to claim 1,
The method further includes the step of preliminarily calibrating the oral scarring image corresponding to the dental arch line of the subject on the basis of the CT image in the second step, wherein a CT image obtained by CT imaging the upper and lower mandibles of the subject is obtained, Characterized in that the denture manufacturing method. The method according to claim 1,
In the second step, the digital library includes three-dimensional outer shape information of a plurality of virtual dental thermal templates having, as a selection item, a dental arch line, an occlusal height, and an arrangement position of teeth,
Wherein the occlusion height is set on the basis of a vertically spaced interval of the upper and lower malleas calculated based on the optimized tender sensitivity of the subject during occlusion of the upper and lower males. 5. The method of claim 4,
Wherein in the second step, the virtual tooth template further includes a standardized tooth image corresponding to the selected item.

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