KR102581508B1 - manufacturing method of digital overdenture - Google Patents

Abstract

To improve tooth restoration precision, the present invention includes a first step of setting a virtual temporary denture with a virtual insertion groove; A second step of manufacturing temporary dentures having temporary insertion grooves corresponding to the virtual insertion grooves; A third step in which an abutment with a healing part is fastened to the upper side of the fixture installed in the target arch, and the temporary insertion groove is corrected and formed into a correction groove; A virtual overdenture base with a virtual embedding portion set is created based on the corrected scanning image of the corrected temporary denture, and the virtual overdenture base is transmitted to a manufacturing device to create an overdenture base with an embedding portion corresponding to the virtual embedding portion formed. Fourth stage of manufacturing; and a fifth step in which the abutment is separated from the fixture, the attachment is replaced and fastened, and a housing cap is attached and fixed to one side of the embedded part to finally manufacture the digital overdenture. do.

Description

Manufacturing method of digital overdenture {manufacturing method of digital overdenture}

The present invention relates to a method of manufacturing a digital overdenture, and more specifically, to a method of manufacturing a digital overdenture that improves tooth restoration precision.

In general, dentures or prosthetics are artificial periodontal tissues in the oral cavity that replace missing natural teeth and artificially restore their appearance and function. At this time, the denture or prosthesis can be installed inside the oral cavity to restore masticatory function and prevent deformation of periodontal tissue. The dentures or prosthetics can be divided into partial/complete dentures and partial/complete prosthesis depending on the number of missing teeth.

Meanwhile, the denture is installed by applying dental adhesive to its inner molding groove and adhering to the surface of the gums, and direct occlusal pressure is applied to the gums. Because of this, there was a problem of causing a foreign body sensation and pain in patients using the dentures. On the other hand, since the prosthesis is fixed to a fixture installed in the alveolar bone, the sensation of a foreign body in the gums and pain caused by occlusal pressure can be reduced. However, there was a problem in that the prosthesis was substantially permanently fixed to the oral cavity, making maintenance such as cleaning difficult. Accordingly, an overdenture that compensates for the shortcomings of the denture and the prosthesis has been disclosed.

In detail, the overdenture, like the prosthesis, is fixed to a fixture implanted in the alveolar bone and is detachable from the oral cavity like the denture, making it easy to maintain, such as cleaning. At this time, the overdenture includes a coupling means that is selectively coupled to the abutment/attachment fixed to the fixture.

Here, the coupling means is provided as a bar type that passes through a plurality of abutments, or is provided as a cap type that individually matches the plurality of attachments.

In detail, the bar-type coupling means is formed as a bent bar bent to be disposed entirely along the patient's dental arch, and the abutment is formed with an insertion portion to which the bar-type coupling means is fastened. And, on the inner surface of the overdenture, a holder insertion portion into which the bending bar and the upper end of the abutment are simultaneously inserted is formed in a groove shape. In this way, the bar-type coupling means has the advantage of being easy to install because it is simultaneously fastened to a plurality of the abutments.

However, the volume of the upper end of the abutment protruding above the gum increases so that the bar-type coupling means is fastened. In addition, the thickness and height of the artificial gum portion must be formed to be large so that the abutment and the bending bar protruding above the gum can be inserted into the overdenture as a whole. As a result, the overall height of the overdenture increases, making it difficult to manufacture the overdenture to fit the patient's vertical diameter. In addition, in order to manufacture the overdenture to fit the patient's vertical diameter, the size of the artificial tooth portion fixed to the artificial gum portion is relatively small, so there is a problem in that aesthetics are deteriorated.

Meanwhile, the cap-type coupling means is provided as a fitting type or a magnetic attachment type for the plurality of attachments. At this time, the cap-type coupling means is inserted into the embedded groove formed on the inner surface of the artificial gum part, and is attached and fixed through curable resin.

Here, in the related art, after manufacturing the overdenture, the embedment groove was processed by predicting the location where the overdenture would be installed in the oral cavity and the installation location of the fixture. Because of this, there was a problem in that the installation position of the fixture and the cap-type coupling means attached and fixed to the buried groove were not accurate and the positional deviation was large. Accordingly, some attempted to overcome the positional deviation by increasing the diameter of the buried groove.

However, when the diameter of the buried groove is greatly expanded, the thickness of the temporary gum portion becomes thinner and its strength becomes weaker. Because of this, there was a problem in that the temporary gum portion was fractured during the occlusal process to adjust the installation position of the overdenture. Additionally, as the amount of the curable resin injected increases, there is a problem in that the time required to cure it increases. Moreover, when the overdenture flows before the curable resin is hardened, there is a problem in that positional accuracy is deteriorated.

Korean Patent No. 10-1409084

In order to solve the above problems, the present invention aims to provide a method of manufacturing a digital overdenture with improved tooth restoration precision.

In order to solve the above problem, the present invention is a housing cap fixed on the inner side to be detachably installed in the oral cavity through an attachment that is fixed to the target arch and has a locking protrusion protruding in the radial outer direction of the upper outer circumference and is formed to be stepped from the lower side. A method of manufacturing a digital overdenture, comprising: a first step of setting a virtual temporary denture with a virtual insertion groove set at a position corresponding to placement information in which image information about the oral cavity is set in a virtual integrated planning image through a planning unit; A second step in which the virtual temporary denture is transmitted to a manufacturing device to manufacture a temporary denture having a temporary insertion groove corresponding to the virtual insertion groove; An abutment provided with a healing portion having a continuous cross-sectional area in the longitudinal direction is fastened to the upper side of the fixture installed in the target arch in response to the placement information to set the gum regeneration range, and the temporary insertion groove is provided. A third step of forming correction grooves corresponding to the healing portion; A virtual overdenture base in which a virtual embedding portion exceeding the volume of the housing cap is set is created based on a correction scanning image obtained through an imaging device for the corrected temporary denture and loaded into the planning unit, wherein the virtual overdenture base is A fourth step of manufacturing an overdenture base including an artificial tooth portion and an artificial gum portion formed with an embedded portion corresponding to the virtual embedded portion, which is transmitted to the manufacturing device; and a fifth step in which the abutment is separated from the fixture, the attachment is replaced, and the housing cap is attached and fixed to one side of the embedded part to finally manufacture the digital overdenture. provides.

Through the above solutions, the present invention provides the following effects.

First, the healing part of the abutment temporarily installed on the fixture is provided with a continuous cross-sectional area in the longitudinal direction, so that the undercut structure where relining resin flows in during the correction process of the temporary denture and gets caught is eliminated, so that the temporary denture with the correction groove formed can be separated. Since traction is applied to the fixture and it is prevented from moving, placement precision can be significantly improved.

Second, as the outer circumference of the healing part corresponds to the outer diameter of the housing cap, the matching between the correction groove image displayed on the correction scanning image of the temporary denture and the virtual housing cap selected and extracted from the digital library is improved, allowing the design information of the embedded groove to be accurately obtained. As a result, the installation precision of the digital overdenture in the oral cavity can be significantly improved.

Third, as the vent hole is formed from the embedded groove to one side of the artificial gum part, there is no need to form a hole in the artificial tooth part for injection or removal of the curable resin, so the durability of the artificial tooth part can be significantly improved, and the curable resin is added to the housing cap. It can be discharged through the opening side and prevented from flowing in between the attachment and the housing cap.

Fourth, since the vent hole is opened slanted to the lingual side, even if excess resin is pushed out of the vent hole through occlusal pressure, it can be easily removed and finished, and the traces of finishing the vent hole are practically not revealed to the outside, improving aesthetics. As this is improved, the patient's satisfaction with use can be significantly improved.

1 is a flowchart of a method for manufacturing a digital overdenture according to an embodiment of the present invention.
Figure 2 is a block diagram of a manufacturing system for a digital overdenture according to an embodiment of the present invention.
Figure 3 is an example diagram showing a planning image in the manufacturing method of a digital overdenture according to an embodiment of the present invention.
Figure 4 is an exemplary view showing the inner surface of a temporary denture in the method of manufacturing a digital overdenture according to an embodiment of the present invention.
Figure 5 is an example diagram showing the correction process of a temporary denture in the manufacturing method of a digital overdenture according to an embodiment of the present invention.
Figures 6a and 6b are illustrations showing an abutment including a healing part applied to the manufacturing method of a digital overdenture according to an embodiment of the present invention.
Figure 7 is an example diagram showing the creation process of a virtual overdenture base in the manufacturing method of a digital overdenture according to an embodiment of the present invention.
Figures 8a and 8b are exemplary views showing the manufacturing process of the final digital overdenture in the manufacturing method of the digital overdenture according to an embodiment of the present invention.

Hereinafter, a method of manufacturing a digital overdenture according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings. At this time, hereinafter, it is preferable to understand that the upper side is a direction corresponding to the occlusal surface of the teeth based on the upper jaw, and the lower side is a direction corresponding to the tooth root side based on the upper jaw.

FIG. 1 is a flowchart of a method for manufacturing a digital overdenture according to an embodiment of the present invention, and FIG. 2 is a block diagram of a digital overdenture manufacturing system according to an embodiment of the present invention.

Referring to Figure 1, the method of manufacturing a digital overdenture according to the present invention includes a series of steps such as virtual temporary denture setting, temporary denture manufacturing, temporary denture correction, overdenture base manufacturing, and final digital overdenture manufacturing.

At this time, the digital overdenture, which will be described below, is a dental restoration designed and manufactured to suit the oral environment of each patient, and is detachably installed in the target dental arch. In detail, a housing cap is fixed to the inner surface of the digital overdenture, and an attachment that is selectively coupled to the housing cap is fixed to the target arch.

At this time, the attachment is fixed to the upper end of the fixture installed in the target arch, and a locking protrusion protrudes in a radial outer direction around the upper outer periphery of the attachment. Accordingly, a locking groove that is stepped from the locking protrusion may be formed in an undercut shape on the lower side of the locking protrusion. Additionally, a restraining protrusion on which the locking protrusion is caught may protrude in a radial inward direction on the inner periphery of the housing cap. Accordingly, the housing cap and the attachment can be fixed to each other through the combination of the locking protrusion and the restraining protrusion.

Here, the target arch is preferably understood as the dental jaw requiring the digital overdenture, and in the present invention, it is explained and illustrated as the upper jaw, which is an edentulous jaw. In addition, the opposing arch, which will be described later, is preferably understood as the dental jaw that occludes with the target arch, and in the present invention, it is explained and shown as the lower jaw, which is a dentulous jaw. Of course, in some cases, the present invention can be equally applied to the manufacturing process of a digital overdenture installed when the lower jaw or both upper and lower jaw are edentulous.

In addition, it is desirable to understand that the temporary denture is a denture that is first manufactured in order to obtain accurate design information for the digital overdenture. In addition, since the temporary denture can be temporarily used by the patient during the manufacturing period of the digital overdenture, usability and convenience in the tooth restoration process can be significantly improved.

Referring to FIG. 2, the method of manufacturing the digital overdenture may be performed through a digital overdenture manufacturing system 200 including an imaging device 201, a planning unit 202, and a manufacturing device 203.

In detail, the imaging device 201 is used to acquire three-dimensional surface information (m2, m3) and alveolar bone information (m7) about the target arch and the opposing arch. It is desirable that the imaging device 201 be understood as a concept encompassing a dental scanner and a CT imaging device. That is, three-dimensional surface information (m2, m3) about the outer surface of the target arch and the opposing arch can be obtained as an image using the dental scanner. Additionally, surface information of the temporary denture can be obtained as a three-dimensional image using the dental scanner. At this time, the dental scanner may include a mobile scanner that is easy to use in the oral cavity and a fixed scanner that can accurately scan the temporary denture. In addition, using the CT imaging device, alveolar bone information (m7), which can confirm the shape and curvature of the alveolar bone and the position of the inferior alveolar nerve, can be obtained as a three-dimensional image and cross-sectional image.

The planning unit 202 is preferably understood as a calculation unit of a computer device that collects, calculates, and models image information acquired through the imaging device 201 and digital information previously stored in the digital library 204, which will be described later. That is, the image information acquired through the imaging device 201 is loaded into the planning unit 202, and the image information is displayed on a display connected to the planning unit 202. Then, the image information is virtually aligned corresponding to the preset vertical height. Accordingly, a planning image can be created for establishing an overall tooth restoration plan and designing the digital overdenture.

Here, it is desirable to understand that the digital library 204 is a database in which basic external appearance information of components used for tooth restoration is stored as three-dimensional vector data. In detail, the digital library 204 may store a plurality of three-dimensional external appearance information on physical abutments and attachment devices, which will be described later. In addition, the digital library 204 may also store three-dimensional external shape information for designing the temporary denture and the digital overdenture. This digital library 204 is connected to the planning unit 202 through wired and wireless communication, and information previously stored in the digital library 204 can be selectively extracted and loaded into the planning unit 202. Alternatively, the digital library 204 may be provided as a storage included in the planning unit 202.

The manufacturing device 203 is preferably understood as a device for manufacturing a temporary denture or a digital overdenture in real form based on the design information of the temporary denture or the design information of the digital overdenture 300. The manufacturing device 203 may be equipped with a 3D printer, dental CNC, or mold device.

Figure 3 is an exemplary diagram showing a planning image in the method of manufacturing a digital overdenture according to an embodiment of the present invention.

Referring to Figures 2 and 3, the planning image (m1) is preferably generated based on image information about the patient's oral cavity.

In detail, the three-dimensional surface information (m2, m3) and the alveolar bone information (m7) of the target arch and the opposing arch are loaded into the planning unit 202 and displayed as a three-dimensional image. Then, the planning image (m1) can be generated as the three-dimensional surface information (m2, m3) and the alveolar bone information (m7) are virtually aligned to correspond to a preset vertical dimension (occlusal vertical dimension, VD). At this time, it is preferable that a plurality of pieces of fixture placement information (m8) are set in the planning image (m1), spaced apart from each other along the dental arch line.

Also, it is preferable that the virtual temporary denture (m60) is set based on the planning image (m1). Here, it is desirable to understand that the virtual temporary denture (m60) is design information of the temporary denture. The virtual temporary denture (m60) includes a virtual temporary gum portion (m62) and a virtual temporary tooth portion (m61). Here, the height and row of teeth of the virtual temporary tooth unit (m61) can be set by considering the vertical diameter (VD) and the chewing relationship with the opposing arch. In addition, the virtual temporary gum part (m62) is connected to surround the root side of the virtual temporary tooth part (m61), and the inner contour of the virtual temporary gum part (m62) contains three-dimensional surface information (m2) of the target arch. ) can be set in response to.

At this time, it is preferable that the virtual insertion groove (m63) is set at a position corresponding to the installation information (m8). Here, it is preferable to understand that the virtual insertion groove m63 is design information of the temporary insertion groove formed in the temporary denture. The virtual insertion groove m63 is preferably set as a groove with a first volume exceeding the maximum cross-sectional area and protrusion height of the upper end of the abutment, which will be described later. At this time, it is preferable to understand that the abutment hereinafter refers to an abutment provided with a healing part.

Here, it is more preferable that the first volume is set to include a preset position error interval (5) centered on the placement information (m8). The position error interval (5) is preferably understood as an error value that can occur between the placement information (m8) and the actual placement position (6) of the fixture (8). Therefore, it is preferable to understand that the first volume is set by adding the position error interval 5 as the radius value and height to the maximum cross-sectional area and protrusion height of the upper end of the abutment.

Figure 4 is an exemplary diagram showing the inner surface of a temporary denture in the method of manufacturing a digital overdenture according to an embodiment of the present invention, and Figure 5 is a correction diagram of a temporary denture in the method of manufacturing a digital overdenture according to an embodiment of the present invention. This is an example diagram showing the process. And, Figures 6a and 6b are illustrations showing an abutment including a healing part applied to the manufacturing method of a digital overdenture according to an embodiment of the present invention.

2 to 5, the virtual temporary denture (m60) is transmitted to the manufacturing device 203, and the temporary insertion groove (63) corresponding to the virtual insertion groove (m63) is formed. ) is manufactured. At this time, the temporary denture 60 includes a temporary gum portion 62 and a temporary gum portion 62, and the temporary gum portion 62 and the temporary teeth portion 61 are three-dimensionally printed and then painted. It is preferable that it is manufactured through a process.

Meanwhile, the fixture 8 is installed in the target dental arch 2 in response to the placement information. At this time, it is preferable that a surgical guide be provided to guide the exact installation position of the fixture 8. Here, the surgical guide is preferably designed based on the planning image (m1) and manufactured through the manufacturing device 203. The surgical guide has a guide hole formed at a position corresponding to the placement information (m8). Accordingly, the fixture 8 can be installed in an accurate position as a tool such as a drill is supported on the inner peripheral surface of the guide hole.

Referring to Figures 4 and 5, it is preferable that the abutment 40 provided with the healing part 41 is fastened to the upper side of the fixture 8. The healing part 41 functions to set the gum regeneration range, and is preferably provided so that the upper part has a continuous cross-sectional area in the longitudinal direction. Hereinafter, the abutment 40 provided with the healing portion 41 and the abutment 40 have the same meaning and are described and shown with the same numbers in FIG. 5.

In addition, it is preferable that relining resin (s1) is applied to the inner surface of the temporary denture (60). Here, the relining resin (s1) is preferably made of a material that has a cushioning feeling after curing and is not excessively deformed by pressure. For example, the relining resin (s1) may be made of silicone material. Then, the temporary denture 60 coated with the relining resin s1 is installed in the target arch 2. At this time, the relining resin (s1) applied to the inner surface of the temporary denture (60) and the target arch (2) are arranged to face each other.

Here, when the upper and lower jaws occlude, the relining resin s1 is filled and pressed into the gap between the temporary insertion groove 63 and the healing portion 41 through occlusal pressure. That is, the space between the healing part 41 and the temporary insertion groove 63 formed with a volume larger than the volume of the healing part 41 may be filled with the relining resin s1. In addition, the relining resin s1 may be filled and pressed into the gap occurring between the inner surface of the temporary denture 60 and the outer surface of the target arch 2. Accordingly, a groove corresponding to the external shape of the healing portion may be formed in the relining resin s1 in a negative shape through the occlusal pressure.

It is preferable that the temporary insertion groove 63 is formed into a correction groove 163 through this process. The correction groove 163 may be formed by considering the actual installation position 6 of the fixture 8 actually installed in the target arch 2 and the coupling position of the abutment. Therefore, through the correction process of the temporary denture 60, even the slightest surgical error between the actual placement position of the fixture 8 and the placement information (m8) established in the restoration planning stage can be compensated. In addition, since accurate design information of the digital overdenture 300 is obtained based on the correction groove 163 formed through the correction process of the temporary denture 60, tooth restoration precision can be significantly improved.

Meanwhile, the healing part 41 is provided at the upper end of the abutment 40 and functions to set the regeneration range of the gums. In detail, in order to install the fixture 8 into the alveolar bone 1, the gum, which is a soft tissue covering the alveolar bone 1, is first incised and removed. At this time, the gums can be removed as if cut out using a drill tool for gum removal, and through this, a circular incision hole (3) can be formed in the gums. The removal range of the gum, that is, the inner diameter of the incision hole 3, may correspond to a cross-sectional area exceeding the outer diameter of the housing cap 10. Accordingly, the incision area of the gum can be minimized and interference with surrounding tissues during the installation process of the fixture 8 can be minimized.

Here, the healing portion 41 is preferably provided so that its upper portion has a continuous cross-sectional area in the longitudinal direction. That is, the healing portion 41 does not include an undercut formed by recessing or protruding radially inward or outward on the outer circumference. Moreover, the abutment 40 provided with the healing portion 41 replaces the attachment in which the undercut is formed due to the locking protrusion 24 and is used to replace the fixture 8 during the healing period of the alveolar bone 1 and the gums. ) is combined with. Therefore, when the temporary denture 60 for which corrections have been completed are separated from the target arch 2, the problem of traction being applied to the attachment due to the relining resin s1 flowing into the undercut can be fundamentally eliminated. . Through this, the initial position and direction of the fixture 8 installed in the alveolar bone 1 can be fixed, and safety can be significantly improved by preventing damage to the alveolar bone 1.

At this time, referring to Figure 6a, the abutment is provided as a normal healing abutment (40A). This healing abutment (40A) has an overall upper part formed in a cylindrical shape and is made of a metal material such as titanium. It can be. Additionally, the healing portion may be provided as a separate cap member, that is, the healing cap 41a. Therefore, the correction groove is formed by combining the healing cap 41a to cover the upper end of the abutment, and the temporary insertion groove is formed into a negative shape corresponding to the external shape of the healing portion 41a through the occlusal pressure. It may be formed including the step of forming correction.

Here, the healing abutment 40A can perform its own function of setting the regeneration range of the gums during the healing period, but does not function as a scan body. Therefore, the healing cap 41a is preferably made of a synthetic resin material, and at least one scan alignment surface portion 42a is formed on the outer surface. Through this, scattering of light is prevented in the process of scanning the target arch, and the position and direction can be accurately displayed through the scan alignment surface portion 42a.

Moreover, the healing cap 41a may actually function as a means for setting the regeneration range of the gums. In addition, the correction groove may be formed into a negative shape corresponding to the external shape of the healing portion, that is, the healing cap 41a, through the occlusal pressure.

In detail, the healing abutment (40A) is fixed to the fixture (8), and the healing cap (41a) is coupled to the upper end of the healing abutment (40A). Accordingly, the upper end of the healing abutment (40A) to which the healing cap (41a) is coupled protrudes toward the inner upper part of the incision hole (3). In addition, three-dimensional surface information of the target arch where the healing cap 41a protrudes can be obtained through the imaging device. Subsequently, the correction process of the temporary denture described above may be performed.

At this time, the healing cap 41a may be inserted into the inner periphery of the correction groove and separated from the upper end of the healing abutment. That is, the inner surface of the healing cap 41a may function as the inner surface of the correction groove. Therefore, when a patient temporarily uses the temporary denture during the healing period of the alveolar bone and gums, the upper end of the healing abutment can be fitted into the inside of the healing cap 41a. At this time, since the healing cap 41a is made of a synthetic resin material with a predetermined strength, when using the temporary denture, the inner surface of the correction groove is directly pressed against the healing abutment due to the occlusal pressure, preventing deformation or damage in advance. It can also be prevented.

Alternatively, referring to Figure 6b, the abutment may be provided as a healing scan body (40B). Additionally, the healing portion 41b may be formed to protrude integrally from the upper end of the healing scan body 40B to have a cross-sectional area corresponding to the outer circumference of the housing cap. At this time, the scan alignment surface portion 42b may be formed on the outer surface of the healing portion 41b. In other words, it is preferable to understand that the healing scan body 40B is one abutment member that simultaneously performs the healing abutment function and the scan body function. Therefore, the convenience of the procedure can be significantly improved by not requiring a separate cap member.

Figure 7 is an exemplary diagram showing the process of creating a virtual overdenture base in the manufacturing method of a digital overdenture according to an embodiment of the present invention.

Referring to FIG. 7, it is preferable that a corrected scanning image (m162) of the temporary denture is acquired through the imaging device. Here, the correction scanning image (m162) is obtained by scanning the entire inner and outer surface of the temporary denture, and it is preferable to understand that the remaining portion except the image of the inner surface of the temporary gum portion including the correction groove is erased. . It is preferable to understand that the erasure means that part of the image is deleted or rendered invisible.

And, it is preferable that the correction scanning image (m162) is loaded into the planning unit. At this time, it is preferable that the correction groove image (m163) corresponding to the correction groove is displayed concavely in the correction scanning image (m162).

Meanwhile, it is preferable that the virtual overdenture base (m301) is created based on the correction scanning image (m162). Here, it is desirable to understand that the virtual overdenture base (m301) is design information for the actual overdenture base. The overdenture base includes an artificial gum portion and an artificial tooth portion, which will be described later.

In addition, it is preferable that a virtual buried portion exceeding the volume of the housing cap is set in the virtual overdenture base (m301). Here, it is preferable to understand that the virtual embedment part is design information of the embedment part actually formed in the overdenture base.

In detail, it is preferable that the virtual gum part (m303), which is three-dimensional external shape information of the artificial gum part, is virtually arranged above the three-dimensional external shape information of the target arch displayed in the correction scanning image (m162) or the planning image.

In addition, it is preferable that the virtual tooth part (m302), which is the three-dimensional external shape information of the artificial tooth part, is virtually aligned at the top of the virtual gum part (m303). At this time, the inner contour of the virtual gum portion (m303) may be set to correspond to the three-dimensional surface information (m2) or the correction scanning image (m162) of the target arch. In addition, the virtual tooth portion (m302) may have its dentition and chewing surface shape set based on the three-dimensional surface information (m3) of the opposing arch. Moreover, the basic image data of the virtual tooth portion (m302) and the virtual gum portion (m303) are substantially the same data as the virtual temporary tooth portion (m61 in FIG. 3) and the virtual temporary gum portion (m62 in FIG. 3). It is desirable to understand that it is.

Here, it is preferable that a virtual buried groove is set on the lower side of the virtual tooth portion (m302). The position of the virtual buried groove may be virtually aligned based on the correction groove image (m163). In addition, it is preferable that the virtual vent hole (m306) communicating with the virtual buried groove is spaced apart from the root side of the virtual tooth portion (m302) and communicated at an angle toward the rear.

In detail, the virtual gum portion (m303) may be set in consideration of the volume of the attachment device protruding to the outside of the target arch (2). Here, the attachment device is a means for coupling the fixture and the digital overdenture to each other, and preferably includes the attachment and the housing cap.

The virtual gum portion (m303) is set, and the root side of the virtual tooth portion (m302) is virtually overlapped along the top of the virtual gum portion (m303). At this time, a virtual assembly groove (m303a) corresponding to the overlapping area of the virtual tooth portion (m302) and the virtual gum portion (m303) may be set on the upper side of the virtual gum portion (m303). Also, the virtual vent hole (m306) can be set to be virtually spaced apart from the virtual assembly groove (m303a). Accordingly, a vent hole, which will be described later, and an assembly groove, which will be described later, can be distinguished.

At this time, the virtual burial part is preferably set through the following series of processes.

First, it is preferable that the virtual housing cap (m10) corresponding to the three-dimensional external shape information of the housing cap is selected and extracted from the digital library and loaded into the planning unit. In addition, it is preferable that the virtual housing cap (m10) is virtually overlapped with the corrected home image (m163) based on preset matching information. Here, the matching information includes a diameter or cross-sectional area calculated from the correction groove image (m163), a center line corresponding to the diameter, and specific position information calculated from the shape of the scan alignment surface displayed on the correction groove image (m163). can be set.

Subsequently, it is preferable that the correction home image (m163) is replaced with the virtual housing cap (m10). Here, it is desirable to understand that swap means replacing or exchanging one image with another image processing or an image transformed according to image processing. That is, the correction home image (m163) can be replaced with the virtual housing cap (m10).

In addition, the virtual buried portion, particularly the virtual buried groove, may be set to be expanded from the outer surface contour of the virtual housing cap m10 to include the clearance gap. That is, the virtual buried groove is set based on the outer contour of the virtual housing cap (m10). Additionally, the virtual vent hole (m306) may be set to be inclined so as to communicate with the virtual buried groove and be spaced apart from the virtual assembly groove (m303a).

Moreover, the virtual burial unit may further include the following series of processes.

First, a virtual healing unit corresponding to the 3D external appearance information of the healing unit may be selected and extracted from the digital library and loaded into the planning unit. In addition, the virtual healing unit may be virtually superimposed on the corrected home image (m163) based on preset matching information.

Here, the correction groove 163 is formed in a negative shape corresponding to the external shape of the healing portion in the relining resin (s1). That is, a common portion may be included in the three-dimensional inner contour of the corrected home image (m163) and the three-dimensional outer contour of the virtual healing unit. And, the common part can be set as the matching information. And, based on the matching information, the virtual healing unit virtually overlaps with the corrected home image (m163), and the corrected home image (m163) can be replaced with the virtual healing unit.

At this time, the virtual housing cap (m10) virtually overlaps with the virtual healing part, but the virtual healing part can be replaced with the virtual housing cap (m10). In detail, selection information on the standard, diameter, height, and mutually matching attachments corresponding to the virtual housing cap (m10) are stored in the digital library along with the external shape information of the virtual housing cap (m10). In addition, selection information on the standard, diameter, height, and matching virtual housing cap (m10) corresponding to the virtual healing unit is stored in the digital library along with the external appearance information of the virtual healing unit. Accordingly, the virtual housing cap (m10) and the virtual healing unit that match each other can be easily extracted from the digital library.

Moreover, the virtual housing cap (m10) and the virtual healing unit can be set and stored in the digital library. Therefore, when one virtual image is selected, other virtual images associated with it can be extracted as a set. At this time, a plurality of other virtual images are linked to one virtual image and set, and the optimal virtual image required for actual tooth restoration can be accurately extracted from the plurality of different virtual images based on the selection information.

And, based on the selection information, the virtual housing cap m10 can be virtually aligned at the correct position. Through this series of processes, the virtual embedment part can be set to a more accurate and precise position in response to the correction groove image (m163).

Meanwhile, the virtual overdenture base (m301) can be set by further including the following series of processes.

In detail, a first alignment scanning image of the target arch with the healing portion protruding and a second alignment scanning image of the temporary denture with the correction groove formed therein may be respectively acquired through the imaging device 201. At this time, it is preferable to understand that the second alignment scanning image is substantially the correction scanning image (m162). And, the obtained first alignment scanning image and the second alignment scanning image may be loaded into the planning unit.

Here, the first alignment scanning image may include 3D surface information of the target dental arch and 3D surface information of the healing portion displayed to protrude outside the 3D surface information of the target dental arch. And, the second alignment scanning image may include the correction home image (m163).

At this time, the first alignment scanning image and the second alignment scanning image may be virtually overlapped based on image areas that match each other. For example, the first alignment scanning image and the second alignment scanning image may virtually overlap each other based on the 3D surface information of the healing part and the correction groove image (m163) included in each.

Here, the inner contour of the digital overdenture can be more accurately set based on the three-dimensional surface information of the target arch included in the first alignment scanning image. And, the position of the virtual buried groove can be accurately set based on the correction groove image (m163) included in the second alignment scanning image. Through this, precision between the digital overdenture and the target arch can be significantly improved.

Moreover, since the scan alignment surface portion is formed on the outer surface of the healing portion, the scan alignment surface portion can be displayed as an image at the same position of the first alignment scanning image and the second alignment scanning image. Accordingly, the first alignment scanning image and the second alignment scanning image may be virtually overlapped with the scan alignment surface portion image included in each image as a comparison area. Through this, the degree of matching between each alignment scanning image can be further improved.

In addition, it is preferable that the virtual overdenture base (m301) created through the planning unit is loaded into the manufacturing device to manufacture the actual overdenture base.

FIGS. 8A and 8B are exemplary views showing the manufacturing process of the final digital overdenture 300 in the manufacturing method of the digital overdenture according to an embodiment of the present invention.

Referring to FIGS. 8A and 8B, the digital prosthesis can be finally manufactured through a process described later.

In detail, the overdenture base 301 preferably includes an artificial tooth portion 302 and an artificial gum portion 303. The artificial tooth portion 302 is preferably understood as a portion provided to replace a missing tooth in the target arch 2. In addition, the artificial gum portion 303 is installed to surround the target dental arch 2, and the artificial tooth portion 302 is preferably understood as a portion disposed in response to a preset dental arch.

At this time, it is preferable that an embedding part 304 corresponding to the virtual embedding part is formed in the artificial gum part 303. In detail, the buried portion 304 preferably includes a buried groove 305 recessed to correspond to the virtual buried groove and a vent hole 306 formed through the virtual vent hole to correspond to the virtual vent hole.

The artificial tooth portion 302 and the artificial gum portion 303 may be separately formed of different materials, taking color, strength, etc. into consideration. For example, the artificial gum portion 303 may be made of an acrylic oligomer resin, and the artificial tooth portion 302 may be made of zirconium or the like. Then, the overdenture base 301 can be manufactured as the lower end of the artificial tooth portion 302 is inserted and fixed into the assembly groove 303a formed at the upper end of the artificial gum portion 303. Here, it is preferable to understand that the assembly groove 303a is formed in the artificial gum portion 303 based on the virtual assembly groove.

In detail, it is preferable that the abutment is separated from the fixture 8 and the attachment 20 is replaced and fastened. Also, it is preferable that the buried groove 305 is filled with curable resin (r1) and the housing cap 10 is inserted into the buried groove 305. Here, a protective cover 9 may be covered on the outer surface of the target arch 2 to prevent the curable resin r1 from directly sticking to the gums. This protective cover 9 may be made of a thin rubber film, and a hole may be formed through it to expose the upper end of the attachment 20.

At this time, the buried groove 305 includes a preset clearance, and is preferably recessed to exceed the volume of the housing cap 10. Accordingly, a space filled with the curable resin (r1) for firmly attaching the housing cap 10 to the buried groove 305 can be secured through the clearance.

Also, the position of the overdenture base 301 within the embedding groove 305 can be corrected so that the overdenture base 301 is engaged between the upper and lower jaw so that the housing cap 10 is matched and coupled to the attachment 20. That is, during the final manufacturing process of the digital overdenture 300, even the slightest error between the attachment 20 and the housing cap 10 is compensated for, so that precision can be significantly improved when installed in the oral cavity.

At this time, the buried portion 304 preferably includes the vent hole 306 communicating with one side of the buried groove 305. The vent hole 306 extends obliquely to one side of the artificial gum portion 303 corresponding to the tongue, and may be in communication with the buried groove 305. Therefore, when the overdenture base 301 is engaged between the upper and lower jaw, the curable resin (r1) can be moved through the vent hole 306 through the occlusal pressure.

That is, excess resin (r2) excluding the curable resin (r1) substantially filled and pressurized into the gap between the buried groove 305 and the housing cap 10 may be introduced into the vent hole 306. In this way, the vent hole 306 fills the gap between the buried groove 305 and the housing cap 10 and functions as a passage through which the remaining excess resin (r2) is moved and discharged to the outside. Accordingly, it is possible to prevent the excess resin r2 from being excessively pushed out toward the opening of the buried groove 305. Accordingly, it is possible to prevent excessive adhesion of the excess resin r2 to the opening side of the housing cap 10, which is the portion where the attachment 20 is inserted. Through this, it is possible to prevent a problem in which the inner circumference of the housing cap 10 is narrowed due to the excess resin r2 and the coupling precision between the attachment 20 and the housing cap 10 is reduced.

At this time, the excess resin (r2) is moved to the end side of the vent hole 306 through the occlusal pressure, and the inside of the vent hole 306 may be filled with the excess resin (r2). Therefore, there is no need for a separate process to bury the vent hole 306 after fixing the housing cap 10 to the buried groove 305. Through this, the manufacturing convenience of the digital overdenture 300 can be significantly improved.

In addition, since the vent hole 306 and the assembly groove 303a are in communication, the problem of the curable resin r1 flowing into the assembly groove 303a can be fundamentally solved. In addition, the problem of having to form a hole in the artificial tooth portion 302 in order to form the vent hole 306 in the vertical direction can be fundamentally solved.

Through this, the hassle of accurately aligning the holes formed in the artificial gum portion 303 and the artificial tooth portion 302 or filling the holes formed in the artificial tooth portion 302 can be eliminated. In addition, since the problem of durability deterioration due to the formation of holes in the artificial tooth portion 302 is prevented, the artificial tooth portion 302 can stably support the masticatory pressure. Moreover, since the vent hole 306 is opened on the lingual side of the artificial gum portion 303, the vent hole 306 is not exposed to the outer surface of the digital overdenture 300, and aesthetics can be significantly improved.

Moreover, as the vent hole 306 is opened to the rear of the artificial gum portion 303, the problem of the vent hole 306 being exposed to the outside can be substantially eliminated. Therefore, even if the amount of excess resin (r2) is greater than the volume of the vent hole 306 and the excess resin (r2) is pushed out of the vent hole 306, it can be removed and finished. In addition, since no traces of finishing the vent hole 306 are substantially revealed, aesthetics are improved and the patient's satisfaction with use can be significantly improved.

When the excess resin (r2) discharged to the outside of the vent hole (306) is removed and the curable resin (r1) is cured, the housing cap (10) is attached and fixed to the embedded portion (304) and the digital over The denture 300 can be finally manufactured.

Meanwhile, terms such as “include,” “comprise,” “equip,” or “have,” as used above, mean that the corresponding component may be present, unless specifically stated to the contrary. Rather than excluding a component, it should be interpreted as allowing additional inclusion of other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

As explained above, the present invention is not limited to the above-described embodiments, and modifications and implementations can be made by those skilled in the art without departing from the scope of the claims of the present invention. And such modifications fall within the scope of the present invention.

m1: Planning image m10: Virtual housing cap
m60: Virtual temporary denture m162: Correction scanning image
8: Fixture 10: Housing cap
20: Attachment 24: Stumbling protrusion
40A: Healing Abutment 40B: Healing Scan Body
41a: Healing cap 300: Digital overdenture
305: Filled groove 306: Vent hole

Claims (10)

A method of manufacturing a digital overdenture in which a housing cap is fixed on the inner side so that it can be attached and detachably installed in the oral cavity through an attachment that is fixed to the target arch and has a locking protrusion protruding in the radial outer direction of the upper outer circumference and is formed to be stepped from the lower side, comprising:
A first step in which a virtual temporary denture with a virtual insertion groove is set at a position corresponding to the placement information set in the planning image in which the image information for the oral cavity is virtually integrated through a planning unit;
A second step in which the virtual temporary denture is transmitted to a manufacturing device to manufacture a temporary denture having a temporary insertion groove corresponding to the virtual insertion groove;
An abutment provided with a healing portion having a continuous cross-sectional area in the longitudinal direction is fastened to the upper side of the fixture installed in the target arch in response to the placement information to set the gum regeneration range, and the temporary insertion groove is provided. A third step of forming correction grooves corresponding to the healing portion;
A virtual overdenture base in which a virtual embedding portion exceeding the volume of the housing cap is set is created based on a correction scanning image obtained through an imaging device for the corrected temporary denture and loaded into the planning unit, wherein the virtual overdenture base is A fourth step of manufacturing an overdenture base including an artificial tooth portion and an artificial gum portion formed with an embedded portion corresponding to the virtual embedded portion, which is transmitted to the manufacturing device; and
A method of manufacturing a digital overdenture comprising a fifth step in which the abutment is separated from the fixture, the attachment is replaced, and the housing cap is attached and fixed to one side of the embedded part to finally manufacture the digital overdenture. According to claim 1,
The fifth step is,
Filling the buried portion, which is recessed with a preset clearance to exceed the volume of the housing cap, with curable resin and inserting the housing cap;
Correcting the position of the overdenture base within the embedding portion so that the overdenture base is pressed between the upper and lower jaw through occlusal pressure so that the housing cap is matched and coupled to the attachment;
A method of manufacturing a digital overdenture, comprising the step of moving and filling the curable resin from the embedding portion through a vent hole formed in oblique communication with one side of the artificial gum portion corresponding to the lingual side of the artificial tooth portion. According to claim 2,
The fourth step is,
A virtual tooth portion, which is the three-dimensional appearance information of the artificial tooth portion, is virtually aligned on the top of the virtual gum portion, which is the three-dimensional exterior information of the artificial gum portion, and a virtual embedment portion is set at the lower side of the virtual tooth portion,
A method of manufacturing a digital overdenture comprising the step of setting a virtual vent hole in communication with the virtual embedment portion to be spaced apart from the root side of the virtual tooth portion and inclined toward the rear. According to claim 2,
In the fourth step, the virtual embedding unit
selecting and extracting a virtual housing cap corresponding to the three-dimensional external shape information of the housing cap from a digital library and loading it into the planning unit;
Virtually overlapping the virtual housing cap on the correction home image concavely displayed in the correction scanning image based on preset matching information;
A method of manufacturing a digital overdenture, characterized in that the correction groove image is swapped with the virtual housing cap and expanded from the outer contour of the virtual housing cap to include the clearance gap. According to claim 4,
In the fourth step, the virtual embedding unit
selecting and extracting a virtual healing unit corresponding to the 3D external appearance information of the healing unit from the digital library and loading it into the planning unit;
Virtually overlapping the virtual healing unit on the corrected home image based on preset matching information;
Digital over, characterized in that the virtual housing cap containing the attachment and linkage information is extracted from the digital library and loaded into the planning unit, and the virtual housing cap is set including the step of virtual overlap and replacement swap with the virtual healing unit. Denture manufacturing method. According to claim 4,
The third step is,
The healing part is provided as a separate cap member and is combined to cover the upper part of the abutment;
A method of manufacturing a digital overdenture, comprising the step of correcting the temporary insertion groove into a negative shape corresponding to the external shape of the healing portion through occlusal pressure to form the correction groove. According to claim 6,
In the second step, the virtual insertion groove is a groove of a first volume exceeding the maximum cross-sectional area and protrusion height of the upper end of the abutment including the healing portion so that a preset position error interval is included around the installation information. is set,
In the third step, the correction groove is
Applying relining resin to the inner surface of the temporary denture and placing it on the target arch;
Digital over, characterized in that the position error interval is corrected by filling and pressing the relining resin into the gap between the temporary insertion groove and the healing portion through occlusal pressure so that the position error interval corresponds to the actual installation position of the fixture. Denture manufacturing method. According to claim 6,
In the third step, the healing part is formed to protrude integrally from the upper end of the abutment to have a cross-sectional area corresponding to the outer circumference of the housing cap. According to claim 4,
The fourth step is,
A first alignment scanning image of the target arch with the healing portion protruding and a second alignment scanning image of the temporary denture with the correction groove formed are respectively acquired through the imaging device and loaded into the planning portion;
Virtually overlapping the first alignment scanning image and the second alignment scanning image based on the healing portion image and the correction home image that match each other;
The virtual embedding part is set based on the correction groove image, and the inner contour of the virtual gum part, which is the 3D external shape information of the artificial gum part, is set based on the 3D surface information of the target arch included in the first alignment scanning image. A method of manufacturing a digital overdenture comprising the step of: According to clause 9,
In the third step, a scan alignment surface portion is formed on the outer surface of the healing portion,
In the fourth step, the first alignment scanning image and the second alignment scanning image are virtually overlapped with the scan alignment surface portion image included in each image as a comparison area.

Images