KR101957203B1 - manufacturing method of digital denture - Google Patents

Abstract

Provided is a method for manufacturing a digital prosthesis, the method, to make the appearance of the prosthesis mounted in the oral cavity more aesthetic, comprising: a first step of obtaining a three-dimensional work image displaying surface information of a maxillary arch, having a whole outside exposed by a traction device, which is elastically deformed to correspond to an arch-type profile of the maxillary arch and presses soft tissue in the oral cavity, and information of occlusion with a mandibular arch; a second step of setting an artificial tooth unit and an inner profile, wherein an occlusion surface unit occluding and corresponding to the maxillary arch is set, to correspond to the surface information of the maxillary arch based on the three-dimensional work image and manufacturing a digital prosthesis, having an artificial gum unit having an upper end portion covering a lower end portion of the artificial tooth unit, with an acrylic resin material; a third step of forming a primer layer by applying and drying a first coating solution made of the acrylic resin material shielding a surface color of the digital prosthesis on the surface of the artificial gum unit; a fourth step of forming a color expression layer matching the color of the maxillary arch as a paint composition, comprising a base resin, a pigment in a predetermined color, and a dispersant is applied and cured on the primer layer; and a fifth step of forming a surface coating layer as a second coating solution, reinforcing a color expression layer and the surface of the artificial tooth unit, is applied and dried. The base resin, contained in the paint composition, is the same as the acrylic resin material used when the digital prothesis is manufactured.

Description

Manufacturing method of digital denture

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital prosthesis manufacturing method, and more particularly, to a digital prosthesis manufacturing method capable of improving the esthetics of a prosthesis installed in the oral cavity.

In general, a prosthetic appliance is an artificial periodontal tissue that replaces a defective natural tooth and restores its shape and function artificially.

In detail, when the natural tooth is left in a state of being lost, dentition distortion occurs in the adjacent teeth and the contradictory teeth of the missing tooth, resulting in deformation of the facial shape, and the masticatory function is deteriorated and the inconvenience of daily life is increased. Further, when the loss state of the natural teeth is maintained for a long period of time, the alveolar bone surrounding the missing teeth is absorbed into the body, which makes it difficult to install the artificial periodontal tissue.

At this time, the dental prosthesis is installed inside the oral cavity to restore the masticatory function and prevent the periodontal tissue from being deformed. The dental prosthesis can be divided into a denture or a dental prosthesis according to the method of installing the oral cavity. That is, the denture may be installed inside the oral cavity by an adhesive, and the denture may be fixed through a mouthpiece such as a fixture and an abutment.

The dental prosthesis includes an artificial abdomen replacing a defective tooth, and an artificial gum portion surrounding the lower end of the artificial abdomen and having an inner surface portion corresponding to the outer surface of the gum in the oral cavity.

At this time, artificial gums and artificial teeth different in hue are separately manufactured, and the lower end of the artificial abdomen is inserted and fixed in an engaging groove formed in the upper end of the artificial gum to provide the dental prosthesis.

However, there is a problem that the assembly precision between the artificial gingival portion and the artificial tooth portion is lowered due to an error due to shrinkage or the like occurring during the molding or curing process in the process of separately manufacturing the artificial gingival portion and the artificial tooth portion. As a result, the vertical diameter of the tooth is not matched with the mating tooth, so that the masticatory function is deteriorated, and the jaw joint is unreasonably caused to cause discomfort and pain.

In addition, the artificial tooth portion can not be tightly engaged with the artificial gingival portion and can be shaken or separated during use, and the foreign body is infiltrated into the gap portion, which is not hygienic. Further, when the artificial tooth part is separately manufactured and assembled corresponding to each tooth, an excessive gap is generated between the teeth, resulting in a reduction in aesthetic property, and each part to be assembled is broken, so that the dental prosthesis must be manufactured again.

Korean Patent No. 10-1409084

In order to solve the above problems, the present invention provides a digital prosthesis manufacturing method which can improve the esthetics of the prosthesis installed in the oral cavity.

According to an aspect of the present invention, there is provided a method of operating a soft tissue of a subject, the method comprising: A first step in which a three-dimensional work image is displayed; An artificial abdomen in which an occlusal surface portion corresponding to an occlusal surface of the artificial abdomen is set on the basis of the 3D working image and an artificial abdomen whose inner surface profile is set so as to correspond to the surface information of the object arch, A second step in which the digital prosthesis is made of an acrylic resin material; A third step of coating a surface of the artificial gingiva with a first coating liquid of an acrylic resin material that shields the color of the surface of the digital prosthesis, and then drying and forming a primer layer; A fourth step of forming a coloring layer on the surface of the primer layer by applying and curing a coating composition including a base resin, a predetermined color pigment and a dispersing agent to match the hue of the subject arch; And a fifth step of applying and drying a second coating solution for reinforcing the surface of the coloring layer and the artificial abdomen to form a surface coating layer, wherein the base resin contained in the coating composition is used in the manufacture of the digital prosthesis Wherein the acrylic resin material is the same as the acrylic resin material.

In the fourth step, the coating composition is mixed with a photoinitiator, which is activated in the ultraviolet region, to be coated on the surface of the artificial gingiva formed with the primer layer, and a step of curing the composition through an ultraviolet light curing unit .

In the fourth step, the coating composition contains 1.85 to 2.05% by weight of the photoinitiator, 0.027 to 0.038% by weight of a white inorganic pigment and 0.002 to 0.004% by weight of a yellow organic pigment so that the coloring layer matches the hue of the subject arch. % And a red organic pigment in an amount of 0.003 to 0.007% by weight, and 0.007 to 0.015% by weight of the dispersing agent and the remainder of the base resin so that the pigment is uniformly mixed.

Also, in the fourth step, 0.1 to 10 parts by weight of an inorganic filler containing titanium oxide or zinc oxide for preventing deformation of the digital prosthesis when photopolymerized through the ultraviolet light curing unit based on 100 parts by weight of the coating composition is further included desirable.

On the other hand, in the second step, the insertion groove corresponding to the outer surface profile of the artificial abdomen is formed on the inner surface based on the three-dimensional work image, and the lower edge of the mask is covered with the masking cover Wherein the third step includes coupling the masking cover portion to cover the artificial tooth portion and applying the first coating liquid to the outer surface of the exposed artificial gum portion.

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

First, since the artificial abdomen and artificial gingiva are integrally formed and the dimensional tolerance is minimized, the artificial gingiva surface is manufactured at a precise height that can satisfy the vertical height optimized for the subject of prosthesis, and the surface of the artificial gum is painted through a series of painting processes, The digital prosthesis can be provided with a high-quality digital prosthesis whose aesthetic sense is remarkably improved.

Second, since each of the coating liquids and coating compositions laminated on the surface of the artificial gingule contains the same resin as the acrylic resin material used in the manufacture of the digital prosthesis, the fixing force between the layers improves through the high degree of fusion between the isotropic materials, Deterioration due to peeling, abrasion, scratching, washing solution, etc. can be prevented, and the service life can be remarkably prolonged.

Thirdly, since the masking cover part for covering the artificial teeth and separating the paint boundaries is manufactured based on the three-dimensional working image, a separate correction work for clarifying the boundary line between the artificial abdomen and the artificial gum part, which are integrally formed in the painting process, The manufacturing convenience can be remarkably improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart illustrating a method of manufacturing a digital prosthesis according to an embodiment of the present invention; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a digital prosthesis manufacturing method.
3 is a view illustrating an intraoral scanning process in a digital prosthesis manufacturing method according to an embodiment of the present invention.
4 is a cross-sectional exemplary view of a digital prosthesis fabricated in accordance with an embodiment of the present invention.
FIG. 5 is an exemplary view illustrating a state in which a masking cover is coupled in a digital prosthesis manufacturing method according to an embodiment of the present invention; FIG.

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

Herein, the digital prosthesis in the present invention means an artificial substitute for replacing a missing tooth and includes a prosthesis fixed to the inside of the oral cavity through a denture or a fixture / abutment installed in the oral cavity through an adhesive Understanding is desirable.

That is, the present invention can be applied to manufacturing a denture or a prosthesis that is integrally formed so as to surround the lower end of an artificial abdomen replacing a tooth in which an artificial gum portion adhered or fixed to a gingival portion of a target arch in an oral cavity is replaced. At this time, in the case of the denture, the artificial gingival section may be formed to have an area that can be formed by wrapping the inner side of the gingival section of the subject arch. In the case of the prosthesis, a minimum area . Hereinafter, a denture in which a digital prosthesis is installed through an adhesive is described and shown as an example.

1 is a flowchart illustrating a digital prosthesis manufacturing method according to an embodiment of the present invention.

As shown in FIG. 1, the digital prosthesis manufacturing method according to the present invention comprises: (a) obtaining a three-dimensional work image (s10), (d20) manufacturing a digital prosthesis integrally formed with artificial abdomen and artificial gingiva s30), forming a coloring layer on the surface of the primer layer (s40), and forming a surface coating layer (s50) on the surface of the coloring layer and artificial abutment.

Such a digital prosthesis manufacturing method can be performed through a digital prosthesis manufacturing system including an imaging apparatus, a planing unit, and a manufacturing apparatus. Here, it is preferable that the imaging device is understood as a concept encompassing an oral scanner and a CT imaging device, and the planning unit is configured to perform, based on the design information of the digital prosthesis in which the scanning image obtained through the imaging device is loaded and previously stored in the digital library It is desirable to understand that the device is designed to be a virtual digital prosthesis. It is preferable that the manufacturing apparatus is a three-dimensional printer or a milling machine in which the virtual digital prosthesis designed in the planning section is three-dimensionally printed or milled to be fabricated.

As such, since the present invention is designed and manufactured based on an image of an inside of the oral cavity of a person to be prosthodontic requiring the digital prosthesis, high-precision prosthesis can be provided with remarkably improved masticating and occlusal reliability. In addition, the number of times the subject to be prosthodontacted visits the side of a practitioner such as a dentist or a manufacturer of a dental clinic or the like can be reduced, thereby minimizing the manufacturing hassle.

2 is a view illustrating a design process of a digital prosthesis in a digital prosthesis manufacturing method according to an embodiment of the present invention. 3 is a view illustrating an intraoral scanning process in the digital prosthesis manufacturing method according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view illustrating a digital prosthesis manufactured according to an embodiment of the present invention.

As shown in FIGS. 2 to 4, in the digital prosthesis manufacturing method according to the present invention, a three-dimensional operation image 1d in which the surface information of the target arch in the oral cavity and the occlusion information with the confrontation arch is displayed (s10) . An artificial abdomen 1220 on which an occlusal surface portion to be engaged with the confrontation arch is set based on the three-dimensional operation image 1d and an artificial abdomen 1220 having an inner surface profile corresponding to the surface information of the object arch The digital prosthesis 1200 is designed and manufactured (s20). The digital prosthesis 1200 includes the artificial abdomen 1220 and the artificial gum 1210 integrally formed with the artificial abdomen 1220. The artificial abdomen 1220 is formed to surround the lower end of the artificial abdomen 1220, desirable.

Herein, the target arch is the arch of the maxilla and mandible of the subject to be prosthodontically provided with the digital prosthesis 1200. Hereinafter, the case where the target arch is the mandible is described and shown as an example.

In detail, the three-dimensional operation image 1d is preferably image data representing the periodontal tissue information of the subject arch and the gingival sulcus / tooth during the occlusion of the arch. At this time, the 3D working image 1d includes the target arch-side scanning image 2d including the surface information of the target arch obtained through the oral scanner s. The scanning image may be included in a scanning image of the side of the confrontation arch obtained by scanning the confrontation arch. The scanning image may be arranged and matched corresponding to the occlusion information in the planning unit, Can be acquired.

2, the three-dimensional working image 1d is obtained by arranging the subject arch-side scanning image 2d and the facing arch-side scanning image 3d on the basis of the occlusion information. Here, the occlusion information includes an occlusal vertical dimension (VD) between the object arch and the arch arch which provides optimized masticatory sensitivity to the subject. In addition, it is preferable that the occlusion information further includes chewing surface information and tooth arrangement information of a confrontation tooth included in the confrontation arch.

The vertical height VD can be calculated by adjusting the thickness of the occlusion alignment base (not shown) disposed between the subject arch and the confrontation arch depending on the gum sensitivity. For example, a wax or a curable resin may be provided in the occlusion space between the subject arch and the confrontation arch, but the thickness may be adjusted corresponding to the vertical height (VD) optimized for the subject, have.

Then, each of the scanning images (2d, 3d) is aligned based on the acquired occlusion image obtained by subjecting the occlusal alignment base whose thickness is adjusted in accordance with the vertical diameter (VD) to the mouth and scanning or CT imaging, (1d). Accordingly, the digital prosthesis 1200, which is designed and manufactured based on the three-dimensional working image 1d, can be set to a height at which the inconvenience in the occlusion or mastication can be minimized by installing the digital prosthesis 1200 in the oral cavity.

At this time, each of the scanning images 2d and 3d is acquired while moving the oral scanner s along the dental arch line of each arch, and includes three-dimensional surface information of each arch. Here, it is preferable that a dental traction device 60 is used to acquire the respective scanning images 2d and 3d in a state in which unnecessary soft tissues are substantially excluded in designing the digital prosthesis.

3, the dental traction device 60 is inserted between at least one side of the inner side of the gingival portion of each arch and the adjacent soft tissue and the gingival portion of each arch, and the soft tissue is separated from the gingival portion Lt; / RTI > Here, the outer portion of the gum portion corresponds to labial and buccal portions of the oral cavity, and the inner portion of the gum portion corresponds to the lingual.

The dental pulling apparatus 60 includes a pulling base portion 61 having a receiving space for accommodating the gingival portion 2 of the target arch or the archery arch and being elastically deformed corresponding to a dental arch profile of each arch, And a grip portion 62 provided on one side of the pulling base portion 61. At this time, the dental traction device 60 applied to the mandibular side is provided so that the pulling base portion 61 covers the inner and outer side portions of the mandibular gingiva as a whole so that the tongue (a), the lips (b) It is possible to simultaneously perform the pulling operation. Alternatively, the dental traction device 60 applied to the maxillary side may be configured such that the pulling base portion 61 surrounds the outer side of the maxillary gingiva, so that the lip and ball mucosa can be clearly traced to the outer shape of the palate have.

If the soft tissue adjacent to the gum portion is pressed by the pulling base portion 61, the flow of the soft tissue can be restrained when the grip portion 62 is gripped.

Thus, the oral scanner (s) maintains a desired scanning path, so that the scanning operation can be performed quickly and stably and the distortion of each of the obtained scanning images 2d and 3d can be minimized. Further, the soft tissues may be spaced apart from the surface portion of the gingiva to obtain the respective scanning images 2d and 3d in a state where the entire outer surface of each arch is exposed.

Therefore, unnecessary images are minimized in designing the digital prosthesis, and clarity and accuracy of the surface information included in each of the scanning images 2d and 3d can be remarkably improved, and the digital prosthesis 1200 can significantly improve the authoring and occlusal reliability.

2, the 3D working image 1d includes virtual digital prostheses 14d (FIG. 1d), design information of the digital prostheses between the target arch-side scanning image 2d and the confrontation arch- ) Is preferably displayed.

In detail, the virtual artificial abutment 16d, which is the design information of the artificial abutment, is loaded on the three-dimensional work image 1d, and on one side of the virtual artificial abutment 16d, It is preferable that the occlusal surface portion 18d is set so as to correspond to the teeth. Such an occlusal surface portion 18d may be set so that one side of the virtual artificial abutment 16d is corrected based on the arrangement of the opposing teeth and the three-dimensional artificial chewing surface information of the opposing tooth so as to be stably engaged with the opposing tooth.

At this time, if the upper and lower jaws are both edentulous, a virtual artificial tooth portion corresponding to the confrontation tooth may be further loaded from the digital library, and each virtual artificial tooth portion may be aligned It is possible.

The virtual artificial gingival section 15d as the design information of the artificial gingival section is loaded so as to be virtually disposed between the lower end 19d of the virtual artificial abutment 16d and the subject arch-side scanning image 2d. Here, the inner surface profile 11d of the virtual artificial gingival section 15d is set so as to coincide with the three-dimensional surface information of the subject arch-side scanning image 2d, and the intraoral installation of the digital prosthesis The precision can be remarkably improved.

The upper end of the virtual artificial gingival portion 15d is integrally connected to the virtual digital prosthesis 14d while surrounding the lower end portion 19d of the virtual artificial abutment 16d or root portion, The virtual arch 14d is arranged in a virtual arrangement between the target arch-side scanning image 2d and the arch-arch-side scanning image 3d in consideration of the vertical height VD.

The virtual artificial gingival section 15d and the virtual artificial abutment section 16d are included in the digital library as data storage associated with the planning section as three-dimensional contour information.

In detail, the digital library includes a plurality of virtual artificial abutments 16d and a virtual artificial abdomen 16d having a standardized dental arch profile, a kind of teeth, an arrangement interval and an angle as a selection item so as to represent individual differences according to gender and age, (15d).

That is, the virtual artificial abdomen 16d and the virtual artificial gum 15d are subdivided according to the selection item and stored in the digital library. If the user inputs a selection item suitable for the person to be prosthodontic, A single virtual artificial abdomen 16d and a virtual artificial gingival section 15d are extracted. Then, the three-dimensional outer shape information of the extracted virtual artificial abdomen 16d and the virtual artificial gum 15d is finely adjusted in a state in which the three-dimensional outer shape information of the virtual artificial abdomen 16d and the virtual artificial gum 15d is virtually arranged in the three-dimensional working image 1d, (14d) can be designed quickly.

4, the digital prosthesis 1200 is fabricated on the basis of the virtual digital prosthesis 14d (FIG. 2), so that the inner surface profile 1211 of the artificial gingival section 1210 is formed on the gums And is formed to cooperate with the sub-outer surface. The artificial abdomen 1220 is formed with a chewing surface portion corresponding to the occlusal surface portion 18d of FIG. 2, and the artificial gum 1210 is integrally formed with the artificial abdomen 1220.

Accordingly, compared with the conventional prosthetic manufacturing method in which the individual components, i.e., the artificial abdomen and artificial gingiva are separately fabricated and assembled, the assembly time and the manufacturing time are shortened, so that the digital prosthesis 1200 can be promptly provided to the subject .

Moreover, the problem that the dimensional tolerance is generated by separately fabricating and assembling each component can be fundamentally solved, and the digital prosthesis 1200 corresponding to the vertical height calculated to be optimized for the subject to be prosthesis can be manufactured. Accordingly, when the digital prosthesis 1200 is installed in the oral cavity of a subject to be prosthodontic, the occlusion and masticating reliability can be remarkably improved, and the foreign body sensation and the pressure of the periodontal tissue and the pain caused thereby can be minimized and the feeling of use satisfaction can be remarkably improved.

Preferably, the digital prosthesis 1200 is manufactured by three-dimensionally printing an acrylic resin material having a predetermined strength so as to minimize deformation of the human body while it is not toxic to the human body so as to be applicable to the oral cavity.

In detail, the digital prosthesis 1200 can be manufactured by three-dimensionally cutting a solid acrylic resin block so as to correspond to three-dimensional contour information of the virtual digital prosthesis 14d (FIG. 2). Alternatively, a slurry image, which is cured by irradiating a light energy such as a laser or ultraviolet light, onto a water tank filled with a liquid acrylic resin, may be manufactured by a light modulation method in which a slice image is formed between tens or thousands of layers and formed into a three-dimensional pattern structure.

 In the meantime, the digital prosthesis 1200, which is manufactured so that the artificial abdomen 1220 and the artificial gum body 1210 are integrally formed and have the same color, corresponds to the color of the actual periodontal tissue in the oral cavity, It is desirable to include a process. The digital prosthesis 1200 having the primer layer p1, the coloring layer p2 and the surface coating layer p3 laminated on the surface of the artificial gum 1210 may be provided.

Specifically, a primer layer p1 is formed on the surface of the artificial gingiva 1210 by coating and drying a first coating liquid of an acrylic resin material that shields the surface color of the digital prosthesis 1200 (s30).

Here, the first coating liquid may be in a liquid or colloid state including the acrylic resin material and zirconium oxide, and may be laminated one to three times on the surface of the artificial gingiva 1219, and the crea. lign can be used.

The first coating liquid preferably includes an acrylic resin that is the same as the digital prosthesis 1200. Accordingly, the primer layer p1 can be tightly adhered and fixed so as to be substantially integrated with the surface of the artificial gum 1210 through a high fusion force between the same materials. In addition, the hue of the artificial gum 1210 is substantially shielded, and the hue of the coloring layer p2 described later can be clearly displayed.

A coating composition including a base resin, a predetermined color pigment and a dispersing agent is coated and cured on the surface of the primer layer (p1) to form the coloring layer (p2) matching with the color of the target arch ). At this time, it is preferable that the coating composition contains a photoinitiator which is activated in the ultraviolet region so that the coating composition can be rapidly cured after being applied to the surface of the primer layer (p1).

Specifically, the coating composition is mixed with the photoinitiator, which is activated in the ultraviolet region, and coated on the surface of the primer layer (p1), and a step of curing the ultraviolet light curing agent to form the coloring layer (p2) desirable. Accordingly, as the coating composition applied on the surface of the primer layer (p1) is rapidly cured, the occurrence of stains due to the flow of the coating composition can be prevented, and a series of painting processes can be rapidly performed, The manufacturing period of the prosthesis 1200 can be remarkably shortened.

Ingredient / product name Composition ratio (% by weight) Photoinitiator Irgacure 819, Irgacure 1173 1.850 to 2.050 Pigment white 0.027 to 0.038 yellow 0.002 to 0.004 red 0.003 to 0.007 Dispersant BYK-disper 118 0.007 to 0.015 Base resin urethane dimethacrylate 68,000 ~ 78,000 ethoxylated 30 bisphenol A dimethacrylate 3.000 ~ 8.000 이보 노닐 acrylate 17,000 ~ 23,000

Table 1 is a table showing the component / product name and the weight percentage of each component included in the coating composition according to the preferred embodiment of the present invention.

As shown in Table 1, the coating composition comprises 1.85 to 2.05% by weight of the photoinitiator and 0.027 to 0.038% by weight of a white inorganic pigment, 0.002 to 3% by weight of a yellow organic pigment to match the color of the coloring layer (p2) 0.004% by weight and 0.003% by weight to 0.007% by weight of a red organic pigment, 0.007-0.015% by weight of the dispersing agent so that the pigment is uniformly mixed, and the balance of the base resin.

In detail, the photoinitiator may be Irgacure 819 or Irgacure 1173 manufactured by Ciba, and Irgacure 819 and Irgacure 1173 may be mixed in a ratio of 1: 0.8-1.2% by weight. Irgacure 819 is advantageous for color development of white or pastel colors. Irgacure 1173 is in a liquid form, and the ease of use is improved and yellowing is minimized, so that a superior coloring feeling can be provided.

When the amount of the photoinitiator is less than 1.85% by weight based on the total weight% of the coating composition, the crosslinking density of the base resin is lowered and the mechanical properties of the coloring layer (p2) . On the other hand, if the amount of the photoinitiator exceeds 2.05% by weight based on the total weight of the coating composition, the crosslinking density is increased and the coloring layer (p2) can be firmly formed. However, due to shrinkage phenomenon, lifting or twisting occurs, Can be lowered.

In addition, as the use of Irgacure 819 or Irgacure 1173 alone is used rather than when used alone, the photocuring efficiency and the color development efficiency of the coloring layer (p2) are improved, so that the digital aesthetic appearance of the digital prosthesis 1200 is significantly Can be improved.

Of course, depending on the type of the photopolymerization initiator, the photoinitiator may be changed to a photoinitiator of the visible light strengthening series or the IR enhancement series.

On the other hand, the white inorganic pigment, the yellow organic pigment, and the red organic pigment may be mixed within the above-mentioned range so that the pigment is colored in a color similar to that of the target arch. The mixing ratio may be varied depending on the color of the surface of the target arch, and may be graded by providing various colors of the mixture so as to improve the similarity with the target arch.

Also, the dispersing agent is included so that the pigment is uniformly mixed in the coating composition, and BYK-disper 118 among commercially available products can be used. Here, when the dispersant is mixed, the coating composition may be applied to the surface of the primer layer (p1) to reduce the surface tension and improve the spreadability, so that it can be applied with a uniform thickness.

At this time, if the dispersing agent is contained in an amount of less than 0.007% by weight or more than 0.015% by weight based on the total weight% of the coating composition, the degree of dispersion between the mixture may be lowered and the coloring layer p2 may be uneven.

Meanwhile, the base resin may be a mixture of an acrylic oligomer and an acrylic monomer, and the digital prosthesis 1200 may be made of the same resin as the acrylic resin material used in manufacturing.

That is, in the present invention, the primer layer p1 and the coloring layer p2, which are sequentially stacked on the surface of the digital prosthesis 1200, are made of the same resin as the acrylic resin material used in manufacturing the digital prosthesis 1200 . As a result, the fixation force due to the high degree of fusion between the respective layers is remarkably improved, so that the delamination of the coloring layer p2 is prevented even when the digital prosthesis 1200 is used for a long time, .

The base resin may include an oligomer selected from the group consisting of urethane dimethacrylate (UDMA), ethoxylated 30 bisphenol A dimethacrylate (EBADMA) and mixtures thereof, and isobonyl It is preferable to include a monomer including isobonyl acrylate (IBOA). Further, it is more preferable that the base resin contains 68,000 to 78,000% by weight and 3.000 to 8.000% by weight of the UDMA and EBADMA relative to the total weight% of the coating composition. In addition, the IBOA is preferably included in an amount of 17,000 to 23,000% by weight based on the total weight% of the coating composition.

In detail, the UDMA has excellent curability and adhesion so that the coloring layer (p2) can firmly adhere to the surface of the primer layer (p1). In addition, when the digital prosthesis 1200 is used, it is possible to prevent peeling or deformation of the coloring layer (p2) due to an external impact or a cleaning solution because of its excellent chemical resistance and physical properties. Since the EBADMA has a significantly low shrinkage rate in the ultraviolet region, the dimensional accuracy of the digital prosthesis 1200 can be significantly improved by compensating for the shrinkage of UDMA in the ultraviolet region.

In addition, the IBOA acts as a cross-linking agent between oligomers that are photopolymerized through the ultraviolet light curing agent as a reactive diluent of the oligomer. Further, since the IBOA imparts low shrinkage and abrasion resistance to the coloring layer (p2) upon curing, the IBOA is excellent in the dimensional accuracy of the coloring layer (p2) and the digital prosthesis 1200 itself Can be remarkably improved.

At this time, if the UDMA is used in excess of 78.000% by weight based on the total weight% of the coating composition, peeling or cracking due to shrinkage of the coloring layer (p2) occurs, and when the EBADMA exceeds 8.000% If used singly, the manufacturing cost of the digital prosthesis 1200 is increased and the economical efficiency is lowered.

When the IBOA is mixed with less than 17.000% by weight based on the total weight% of the coating composition, polymerization efficiency of the oligomer is lowered and the curing rate is slowed. When the IBOA is more than 23.000% by weight, flexibility of the coating composition is reduced, Bending or twisting of the coloring layer p2 may occur.

Of course, the base resin may be formed of various known resin materials used in manufacturing the dental prosthesis, and is not limited to the same material as the resin used in manufacturing the digital prosthesis 1200.

In order to prevent deformation of the digital prosthesis 1200 during the photopolymerization through the ultraviolet light curing unit, it is preferable that 0.1 to 10 parts by weight of an inorganic filler is further added based on 100 parts by weight of the coating composition. At this time, the inorganic filler preferably includes one selected from the group consisting of titanium oxide, zinc oxide, and mixtures thereof.

Such an inorganic filler prevents fusion and fixation of the oligomer and monomer contained in the coating composition with the primer layer p1 while preventing unnecessary crosslinking and shrinkage of the digital prosthesis 1200 due to ultraviolet rays And the dimensional accuracy can be remarkably improved.

At this time, the coating composition may be laminated one to three times on the surface of the primer layer (p1), and the curing time through the ultraviolet light curing unit may take 1 to 5 minutes for each application.

The second coating liquid for reinforcing the surfaces of the coloring layer p2 and the artificial abdomen 1220 is applied and dried to form a surface coating layer p3 (s50).

Specifically, the second coating solution may be applied to the surface of the color development layer (p2) and the artificial abutment 1220, which is commercially available from Optiglaze of GC. Such a second coating liquid may be provided with gloss on the surface of the digital prosthesis 1200 formed of an acrylic resin material, so that aesthetic satisfaction can be remarkably improved. Also, the life of the digital prosthesis 1200 can be significantly prolonged by preventing deformation due to abrasion, scratching, peeling, breakage, washing solution, etc. of the artificial abdomen 1220 and the coloring layer p2.

5 is an exemplary view showing a state where the masking cover unit 80 is coupled in the method of manufacturing the digital prosthesis 1200 according to an embodiment of the present invention.

As shown in FIG. 5, the masking cover portion 80 can be further manufactured during the design and manufacture of the digital prosthesis 1200. The method may further include coupling the masking cover portion 80 to cover the artificial abutment 1220 and applying the first coating liquid to the outer surface of the exposed artificial gum 1210 .

At this time, the inner surface of the masking cover portion 80 is formed with an insertion groove 81 corresponding to the outer surface profile of the artificial abutment 1220. It is preferable that the lower end edge 81a of the insertion groove 81 is formed so as to correspond to the boundary line of the artificial abdomen 1220 and the artificial gum 1210.

The masking cover part 80 may be designed based on the three dimensional working image 1d so that the lower end edge 81a of the masking cover part 80 is positioned on the artificial abdomen 1220 and the artificial gums Can be clearly matched to the boundary line of the portion 1210. Accordingly, even if the artificial abdomen 1220 and the artificial gum body 1210 are integrally formed, if the masking cover 80 is coupled to the artificial abdomen 1220 side, have. Therefore, since unnecessary correction work for clarifying the boundary in the painting process of the artificial gum 1210 covered with the artificial abdomen 1220 by the masking cover part 80 is substantially omitted, the manufacturing convenience can be remarkably improved have.

At this time, the masking cover part 80 may be formed of an elastic material that can be elastically wrapped around the outer surface of the artificial abutment 1220. When the upper end portion of the upper end portion of the artificial abutment 1220 is mated with the artificial abutment surface of the artificial abutment 1220, the lower end portion 81a of the artificial abutment 1220 is inserted into the artificial abutment 1220 and the boundary line of the artificial gum 1210. [

Accordingly, even when the boundary line between the artificial abdomen 1220 and the artificial gum 1210 is not finely processed at the time of applying the first coating liquid and the coating composition, it is possible to clearly distinguish the painting line, It is possible to provide a high-quality prosthesis with significantly improved aesthetics.

It should be noted that the terms "comprises", "comprising", and "comprising" as used in the foregoing description mean that the constituent element can be implanted unless specifically stated to the contrary. But should be construed to include other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

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.

1d: 3D working image 2d: Target archery image
3d: Opposite arches Image 14d: Virtual digital prostheses
1200: digital prosthesis 1210: artificial gingival section
1220: artificial abdomen 60: traction device
80: masking cover part p1: primer layer
p2: color development layer p3: surface coating layer

Claims (5)

A three-dimensional work image is obtained in which the surface information of the target arch and the occlusion information with the confrontation arch are displayed by a traction device that is elastically deformed in response to the arched profile of the target arch to pressurize the soft tissue in the oral cavity. Stage 1;
An artificial abdomen in which an occlusal surface portion corresponding to an occlusal surface of the artificial abdomen is set on the basis of the 3D working image and an artificial abdomen whose inner surface profile is set so as to correspond to the surface information of the object arch, A second step in which the digital prosthesis is made of an acrylic resin material;
A third step of coating a surface of the artificial gingiva with a first coating liquid of an acrylic resin material that shields the color of the surface of the digital prosthesis, and then drying and forming a primer layer;
A fourth step of forming a coloring layer on the surface of the primer layer by applying and curing a coating composition including a base resin, a predetermined color pigment and a dispersing agent to match the hue of the subject arch; And
And a fifth step of applying and drying a second coating liquid for reinforcing the surfaces of the coloring layer and the artificial abdomen to form a surface coating layer,
Wherein the base resin contained in the coating composition is the same as the acrylic resin material used in manufacturing the digital prosthesis. The method according to claim 1,
Wherein the fourth step comprises coating the coating composition with a photoinitiator which is activated in the ultraviolet region and applying the coating composition on the surface of the artificial gingiva formed with the primer layer and a step of curing the composition through an ultraviolet light polymerization machine A method of manufacturing a prosthesis. 3. The method of claim 2,
In the fourth step, the coating composition comprises
1.85 to 2.05% by weight of the photoinitiator, 0.027 to 0.038% by weight of a white inorganic pigment, 0.002 to 0.004% by weight of a yellow organic pigment and 0.003 to 0.007% by weight of a red organic pigment so that the coloring layer matches the hue of the subject arch, 0.007 to 0.015% by weight of the dispersing agent and the remainder of the base resin so that the pigment is uniformly mixed. 3. The method of claim 2,
In the fourth step, 0.1 to 10 parts by weight of an inorganic filler containing titanium oxide or zinc oxide for preventing deformation of the digital prosthesis when photopolymerized through the ultraviolet light curing unit based on 100 parts by weight of the coating composition is further included The method of manufacturing a digital prosthesis. The method according to claim 1,
Wherein in the second step, an insertion groove corresponding to an outer surface profile of the artificial abdomen is formed on the inner surface based on the three-dimensional work image, and a lower edge portion of the masking cover portion corresponding to the boundary line of the artificial abdomen and the artificial gum Lt; / RTI &
Wherein the third step comprises the steps of: coupling the masking cover to cover the artificial teeth; and applying the first coating liquid to an outer surface of the exposed artificial gingiva.

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