KR101947635B1 - manufacturing method and system for digital dental prosthesis - Google Patents

Abstract

In order to improve convenience and precision in manufacture, the present invention provides a digital dental prosthesis manufacturing method. The method includes: a first step of obtaining a three-dimensional work image, which displays surface information of a large maxillary arch with a fixture and an abutment in the mouth and information about occlusion with a large mandibular arch, while designing and manufacturing a temporary prosthesis by arranging a combination area having a side matched with the large mandibular arch and having the other side matched with the surface information of the large maxillary arch and formed in correspondence with the profile of a combination part of the abutment; a second step of installing the manufactured temporary prosthesis in the mouth, and obtaining a correction scanning image about the temporary prosthesis with a corrected occlusion surface and a combination groove including the combination area to be combined with the large maxillary arch with the abutment; and a third step of forming a virtual combination groove matched with the shape and position of the combination area in an inner profile set in accordance with three-dimensional surface information of the combination groove, and designing and manufacturing a digital dental prosthesis by setting an occlusion surface part in accordance with the three-dimensional surface information.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a digital prosthetic manufacturing method,

The present invention relates to a digital prosthesis manufacturing method and a digital prosthesis manufacturing system, and more particularly, to a digital prosthesis manufacturing method and a manufacturing system in which manufacturing convenience and precision are improved.

In general, dental prosthesis is an artificial periodontal tissue that restores the external shape and function artificially by replacing defective natural teeth.

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 prosthesis is installed inside the oral cavity to restore the chewing function and prevent the periodontal tissue from being deformed, and can be divided into partial prosthesis or complete prosthesis depending on the number of missing teeth.

On the other hand, the prosthesis can be installed inside the oral cavity through a fixture / abutment placed on the alveolar bone. Such a prosthesis is conventionally fixed with an adhesive, and the denture used is directly contacted with the gum, thereby causing problems such as deformation of the gums or a large amount of foreign body, and the use of the prosthesis is increasing.

In detail, the prosthesis is provided with a coupling hole into which the support cylinder is embedded. That is, when the perforation is formed in the alveolar bone, the fixture is placed on the perforation formed. Subsequently, when the abutment is installed in the fixture, the support cylinder is engaged with the abutment, so that the prosthesis can be installed inside the oral cavity.

At this time, the support cylinder and the abutment / fixture are formed at a plurality of positions according to the size of the prosthesis, and the prosthesis is stably installed as each support cylinder is matched one to one with the respective abutment / fixture .

However, conventionally, after manufacturing a prosthesis, a method of predicting a placement position of a prosthesis in an oral cavity and a placement position of a fixture / abutment to process a fitting hole and then embedding the supporting cylinder is used, There was a big problem.

That is, after the support cylinder is fastened to the fixture / abutment placed and installed in the alveolar bone, a prosthesis having a large-sized coupling hole is placed in the oral cavity in consideration of manufacturing tolerances.

Then, the engaging hole is expanded according to the positional deviation between the supporting cylinder and the abutment, and when the engaging hole is machined to such an extent that the supporting cylinder is completely inserted, the prosthesis is fixed to the predetermined mounting position. Then, resin was injected between the coupling hole and the supporting cylinder to cure the coupling hole and the supporting cylinder, and the initial installation process of the prosthesis was completed. As a result, there is a problem that the procedure of installing the prosthesis becomes very complicated, and the subsequent hardened resin has a problem that the stability and durability of the prosthesis are deteriorated because the supporting force of the cured resin is weak and is easily separated.

In order to solve this problem, an impression of the target arch is obtained after the impression copings are concluded on the fixture, a model of the target arch is formed using the inner profile of the obtained impression, And the method of manufacturing the prosthesis by setting the angle has been used.

However, in the case of such an impression acquisition method, there is a problem that the impression of the impression causes a patient's discomfort. In addition, the burden of the practitioner is increased due to various complicated and high-difficult process steps, and errors in each process step are often overlapped, resulting in a problem of degraded precision.

Korea Patent No. 10-0403834

In order to solve the above problems, it is an object of the present invention to provide a digital prosthesis manufacturing method and a manufacturing system in which manufacturing convenience and precision are improved.

In order to solve the above-mentioned problems, the present invention provides a three-dimensional operation image in which an in-mouth fixture and an abutment are displayed, And a temporary abutment portion having a temporary abutment portion including an occlusal surface portion corresponding to the abutment surface of the abutment portion and an occlusal surface portion corresponding to the abutment surface of the abutment portion, A first step of designing and fabricating a provisional prosthesis in which a coupling region formed in correspondence with the placement region is arranged and arranged; Wherein the prepared temporary prosthesis is provided in the oral cavity and a mold recess including the engagement region so that the abutment is fitted to the target arch is provided and the temporary prosthesis in which the occlusal surface portion occluded in the engagement arch is corrected A second step in which a corrected scanning image is acquired; And an imaginary coupling groove corresponding to the position and shape of the coupling region is formed in an inner surface profile set in accordance with the three-dimensional surface information of the corrected mold groove, and in accordance with the three-dimensional surface information of the corrected occlusal surface portion, Wherein the temporary prosthesis is provided in the oral cavity and the occlusion pressure is generated by the occlusal pressure when the temporary prosthesis is installed in the oral cavity, And correcting the surface profile of the occlusal surface portion so as to correspond to the surface profile of the object arch and the confrontation arch including the engagement portion of the abutment, and correcting the corrected outer surface of the temporary prosthesis, Wherein a combining region section and an occlusion region section are set in the scanning image, and the correction excluding the merged region section and the occlusion region section Wherein the three-dimensional surface information of the temporary prosthesis is erased to expose inner surface side surface information of the combined area, wherein, in the third step, the inner surface profile of the digital prosthesis includes an inner surface side surface information The method of manufacturing a digital prosthesis is provided.

Further, the present invention is a toothbrush according to the present invention is characterized in that the fixture and abutment in the oral cavity are covered with the target arch surface information, the occlusal surface portions provided in the oral cavity and corresponding to the engagement arches and the surface information of the target arch, An imaging device that acquires a corrected scanning image for a temporary prosthesis in which a mold groove including a coupling area formed corresponding to a coupling portion profile of the template is corrected; Designing a provisional prosthesis in which one side is mated with the confronting arch and the other side is matched with the surface information of the target arch, and a coupling area formed in the inside corresponding to the coupling profile of the abutment is arranged and arranged; Setting a combined area and an occlusal area in the image, deleting the corrected three-dimensional surface information of the temporary prosthesis excluding the combined area and the occlusal area, and correcting the exposed three- Wherein the three-dimensional surface information of the mating surface portion and the occlusal surface portion is replaced with the profile image of the mold-overlapping front surface portion and the profile image of the occlusal correction surface portion, respectively, And forming a virtual engaging groove corresponding to the shape of the occlusal surface, Planning unit to set the design surface digital prosthesis; And a manufacturing apparatus for manufacturing the temporary prosthesis and the digital prosthesis designed as described above.

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

First, the design of the digital prosthesis, which is first manufactured based on the scanned image of the target arch and arch opacity in which the fixture and abutment are placed, is finally manufactured through provisional prosthesis that is installed in the oral cavity and corrected to match exactly with each arch Even if the information is acquired correctly and the prosthesis in use is not available, the temporary prosthesis can be actually used, and thus the usability and convenience in the procedure can be significantly improved.

Secondly, since the temporary region of the temporary prosthesis is integrally formed with the joint region into which the joint portion of the temporary gingival section, the temporary tooth region and the abutment is integrally formed, the trouble of assembling the separate support cylinder is eliminated, Since the design information of the digital prosthesis is obtained through the correction scanning image obtained in the corrected state, the accuracy of the intraoral placement can be remarkably improved.

Third, since the provisional prosthesis is occluded after being installed in the oral cavity, the cavities of the mold recesses and the bonding region layer are filled with the curable resin and are easily corrected to clarify the positional information, Dimensional design information of the butt, so that a digital prosthesis having a coupling groove fixed to the position of the actual fixture / abutment can be manufactured.

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.
2 is a block diagram illustrating a digital prosthesis manufacturing system in accordance with an embodiment of the present invention.
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 view illustrating a design process of a temporary prosthesis in a digital prosthesis manufacturing method according to an embodiment of the present invention.
5 is a view illustrating a process of correcting a temporary prosthesis in a digital prosthesis manufacturing method according to an embodiment of the present invention.
6 is a view illustrating a process of designing a digital prosthesis based on a corrected scanning image in a digital prosthesis manufacturing method according to an embodiment of the present invention.
7 is a view illustrating a process of replacing design information of a coupling region in a digital prosthesis manufacturing method according to an embodiment of the present invention.
8 is an exploded perspective view of a digital prosthesis fabricated in accordance with an embodiment of the present invention.

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

FIG. 1 is a flowchart illustrating a digital prosthesis manufacturing method according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating a digital prosthesis manufacturing system according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, the digital prosthesis manufacturing method according to the present invention includes acquiring a three-dimensional working image and designing / manufacturing temporary prosthesis (s110), adjusting the provisional prosthesis Scanning image acquisition (s120), and digital prosthetic design and manufacture based on the corrected scanning image (s130).

The digital prosthesis manufacturing method of the present invention can be performed using the digital prosthesis manufacturing system 100 including the imaging apparatus 10, the planing unit 20, and the manufacturing apparatus 30. [ In this case, it is preferable that the imaging apparatus 10 is understood as a concept including an oral scanner and a CT imaging apparatus. The planning unit 20 loads the scanning image acquired using the imaging apparatus 10, It is desirable to understand that it is a device in which temporary prosthesis and digital prosthesis are designed based on the design information previously stored in the memory. Preferably, the manufacturing apparatus 30 is a three-dimensional printer or a milling machine, which is actually manufactured by the three-dimensional printing or milling process of the provisional prosthesis and the digital prosthesis designed in the planning unit 20. Of course, the manufacturing apparatus 30 may further include a mold apparatus prepared corresponding to the designed information.

Meanwhile, in this embodiment, a digital prosthesis manufacturing method is shown and described as an example of a manufacturing process of a complete prosthesis in which either the maxillary or mandibular one is edentulous or the upper and lower mandibles are all edentulous inside the oral cavity. Of course, the method of manufacturing a digital prosthesis according to the present invention can also be applied to a partial prosthesis manufacturing process in which partial teeth of a maxilla or mandible are missing.

FIG. 3 is a view illustrating an intraoral scanning process in a digital prosthesis manufacturing method according to an embodiment of the present invention. FIG. 4 is a view illustrating an example of a design process of a temporary prosthesis in a digital prosthesis manufacturing method according to an embodiment of the present invention. FIG. 5 is a view illustrating a process of correcting a temporary prosthesis in a digital prosthesis manufacturing method according to an embodiment of the present invention.

3 to 5, a three-dimensional operation image 1d in which the fixture in the oral cavity and the surface information of the subject arch 2 on which the abutment is placed and the occlusion information with the confrontation arch 3 are displayed, Is obtained. One side of the three-dimensional work image 1d is mated with the confrontation arch 3 and the other side thereof is matched with the surface information of the target arch 2. The inside of the abutment 2, The provisional prosthesis 14 in which the coupling regions formed in correspondence with the profile of the prosthesis 91 are aligned and arranged is designed and manufactured (s110 in FIG. 1).

Herein, the target arch is a dental chord in which a maxillary and mandibular dental prosthesis of a subject to be prosthodontically requiring a prosthesis is practically installed. Hereinafter, the case where the target arch is a mandible is described and shown as an example.

In detail, the three-dimensional working image (1d) includes image data representing periodontal tissue information such as gums / teeth for an opthalmologic object in the oral cavity and occlusal arches occluded thereon and a combined part profile of the abutment placed in the target arch it means. At this time, the three-dimensional working image 1d includes an object arch-side scanning image 2d including an engagement part profile 91d of the object arch 2 and abutment obtained through an oral scanner. Further, it includes an opposed arch-side scanning image (3d) including the surface information of the confrontation arch obtained by scanning the confrontation arch. At this time, when there is a remaining tooth on the side of the confrontation arch, the information on the surface of the gingival portion and the confrontation tooth may be included in the confrontation arch image 3d, and when the confrontation arch is also edentulous, the surface information of the gingival portion is included . In addition, image data of the alveolar bone shape and density obtained through the CT imaging device, accurate dental arch information, and fixture placement position may be obtained, and each such image data may be matched or aligned in the planning section (20 of FIG. 2) And the intraoral surface information and the internal tissue information may be acquired in an integrated manner.

The three-dimensional operation image 1d may be obtained by arranging and 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 occlusal vertical dimension (VD) between the object arch and the confrontational arch, which provides optimized masticatory sensitivity to the subject.

It is preferable that the occlusion information further includes placement information of the fixture and the abutment. In this case, the placement information of the fixture is information on an angle and orientation of the fixture (f) placed in the target arch, and the placement information of the abutment is information on an abutment It is desirable to understand this information as information about the shape, position, and angle of the object. Here, the fixture and the abutment are provided as individual parts, and the fixture (f) is placed in the perforation formed in the target arch and the abutment is fastened to the upper side thereof. Alternatively, the fixture and the abutment may be integrally provided and placed in the target arch.

In addition, the occlusion information may further include chewing surface information and tooth arrangement information of teeth included in the side of the confrontation arch.

The scanning images 2d and 3d are acquired while the imaging device 10 is moved along the dental arch line of each arch in the oral cavity and include surface information of the arches. Design information 14d of the temporary prosthesis is obtained based on the scanning images 2d and 3d for the respective arches in a state where the soft tissues by the elements are substantially excluded and the prepared temporary prosthesis 14 is corrected The design information of the digital prosthesis (300 in Fig. 8) can be obtained through the corrected correction scanning image (1f in Fig. 6).

At this time, the temporary prosthesis 14 is a primary prosthesis manufactured to obtain precise design information on the digital prosthesis 300 (FIG. 8) to be finally manufactured, and the digital prosthesis (300 in FIG. 8) It is desirable to understand that it is an artificial periodontal tissue for practical use. Furthermore, since the provisional prosthesis 14 not only provides the design information of the digital prosthesis 300 (FIG. 8) but also can be temporarily used during the manufacturing period of the digital prosthesis 300 (FIG. 8) The convenience in the procedure can be significantly improved.

3, the tongue (a), the lip (b), and the ball mucosa (b) are formed so that the entire outer surface of the target arch (2) or the cervical arch is clearly exposed at the time of acquiring the respective scanning images It is preferable to use a dental traction device 60 for pushing the same soft tissue in the oral cavity.

At this time, the dental traction apparatus 60 is inserted between the soft tissue and the gum adjacent to at least one side of the outer side of the gum of each arch, and the soft tissue is disposed in the oral cavity so as to be separated from the gum. Here, it is preferable that the outer portion of each gum is a portion corresponding to labial and buccal portions of the oral cavity, and the inner portion of each of the gum portions corresponds to a lingual.

In detail, the dental pulling apparatus 60 includes a pulling base portion 61 having a receiving space in which the gingival portions are received, the pulling base portion 61 being elastically deformed corresponding to the dental arch profile of each arch, And a grip portion 62 provided at one side. At this time, the traction device applied to the mandibular side is provided such that the pulling base portion 61 covers the inner and outer side portions of the mandibular gingiva so that the tongue (a) and the lips (b) . Alternatively, the traction device applied to the maxillary side can be clearly scanned to the outer shape of the palate while the lips b and the mucosa of the ball are being pulled by the pushing base, because the pulling base portion surrounds the outer portion of the maxillary gingiva.

When the grip portion 62 is gripped, the soft tissue adjacent to the respective gum portions is pulled by the pulling base portion 61 so that the flow of the soft tissue can be restrained. Thus, the imaging device 10 is prevented from being deviated from the preferable 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, since the soft tissues are spaced apart from the respective gum portions, the entire outer surface of each gum portion and the engaging portion 91 of the abutment are clearly exposed, so that the clearness of the surface information included in each of the scanning images 2d and 3d And accuracy can be significantly improved. Therefore, the accuracy of the temporary prosthesis 14 designed and manufactured based on the surface information included in each of the scanning images 2d and 3d can be improved, and the accuracy of the temporary prosthesis 14 can be improved, The accuracy of the digital prosthesis (300 of FIG. 8) manufactured on the basis of the present invention can also be significantly improved.

At this time, it is preferable that the scanning images 2d and 3d are arranged so as to be spaced apart from each other according to the occlusion information including the vertical height VD. Here, the vertical height VD may 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 mache sensitivity.

More specifically, the occlusion alignment base (not shown) may be made of a material such as wax which is easy to cut and can form a chewing streak at the end of the opposed tooth at the time of occlusion. On one surface or the other surface, The dental resin can be applied. In this case, it is preferable that the occlusion alignment base (not shown) is partially installed so as not to overlap with the engaging portion 91 of the abutment formed in the plurality of the abutment arches 2.

The occlusal alignment base (not shown) is provided in an occlusion space formed between the in-mouth and upper-and-lower mouth, and the occlusal alignment base (not shown) is press-deformed or cut according to the masticity sensitivity. do. Such sensitivity of writing can be judged by the direct expression of the subject of the prosthesis, and in some cases it may be judged by measuring electrical and chemical signals of the jaw joint and jaw muscles.

The vertical height VD calculated as an optimal value for the subject to be prosthodontic is considered in the designing process of the temporary prosthesis 14. Therefore, the digital prosthesis (300 of FIG. 8) designed and manufactured on the basis of the manufactured temporary prosthesis 14 and the scanning image for the temporary prosthesis 14 is installed in the oral cavity to minimize inconvenience in occlusion and mending The height can be set to be as high as possible.

4 and 5, the three-dimensional working image 1d is formed by arranging the target arch-side scanning image 2d and the arch-arch scanning side image 3d in correspondence with the vertical height VD , And design information 14d of the temporary prosthesis can be displayed between the respective scanning images 2d and 3d. The provisional prosthesis 14 is formed with one side corresponding to the mating arch and the other side corresponding to the target arch 2 and having a coupling region formed corresponding to the coupling portion profile 91d of the abutment, (19) are designed to be aligned and arranged. On the other hand, temporary prostheses, temporary gingivals, temporary teeth, moldings, occlusal surfaces and engaging areas, which will be described below with reference to 14d, 15d, 16d, 17d, 18d and 19d, It is preferable to understand it as image data, i.e., surface information. Also, the provisional prosthesis, temporary gingival section, temporary tooth section, mold abutment, occlusal surface section, and engagement area described as 14, 15, 16, 17, 18 and 19 are actually manufactured provisional prostheses and their respective parts desirable.

In detail, design information 14d of the provisional prosthesis is displayed on the three-dimensional operation image 1d, and one side of the temporary prosthesis 14d is provided with an occlusal It is preferable that the surface portion 18d is set. Such an occlusal surface portion 18d may be set based on the arrangement of the confrontation tooth and the three-dimensional mastic surface information so as to be stably engaged with the mating tooth.

In addition, a mold groove 17d is preferably formed on the inner surface of the other side of the temporary prosthesis 14d so as to coincide with the surface information of the target arch 2d. The mold recess 17d may be set based on the three-dimensional surface information of the target arch 2d so as to be substantially conformed to the surface profile of the target arch 2d.

At this time, since the target arch-side scanning image 2d is obtained by scanning the gingival portion in which the engaging portion of the abutment protruded is protruded, the engaging portion profile of the abutment 91d may be further displayed. At this time, when the abutment is installed, it means that the abutment is fastened to the upper side of the fixture embodied in the target arch, and the prosthesis in which the fixture and abutment are integrated, It is desirable to understand it as a concept that includes.

One end of the other side of the temporary prosthesis 14d is preferably marked with the engagement region 19d which corresponds to the engagement portion profile 91d of the abutment and extends toward the occlusal surface portion 18d.

At this time, the coupling region 19d is arranged in the design information 14d of the provisional prosthesis so as to correspond to the placement position of the abutment, but the supporting cylinders may be arranged and replaced. That is, since the engagement end formed at one end of the support cylinder is aligned with one end of the engagement region 19d, the engagement region 19d is formed such that the temporary prosthesis or digital prosthesis is fixed to the abutment Which can be compensated for by the inner circumferential surface shape of the supporting cylinder to be fastened.

The provisional prosthesis 14 manufactured on the basis of the design information 14d of the provisional prosthesis has a temporary gingival portion 15 including a mold recess 17 including a coupling region 19 and an occlusal surface portion 18 And a temporary tooth portion 6 that includes a temporary tooth portion 6a. The provisional prosthesis 14 is preferably formed of a synthetic resin material which can be applied in the oral cavity but can be cut with a cutting tool while having a predetermined strength so as to minimize deformation during chewing. Therefore, in the correction process of the provisional prosthesis 14, which will be described later, the cutting can be corrected so as to maximize the fitting and the occlusion accuracy with respect to the oral cavity and the abutment. At this time, the temporary prosthesis 14 may be manufactured by three-dimensionally printing the temporary gingival section 15 and the temporary tooth section 16 including the coupling region 19 integrally through a three-dimensional printer, In some cases, a milling machine or a mold may be prepared and integrally manufactured.

Specifically, the present invention acquires each scanning image (2d, 3d) on the surface information of each arch in the oral cavity using the imaging device (10 in Fig. 2). The acquired scanning images 2d and 3d are transmitted to the planning unit 20 in FIG. 2 and are aligned and arranged to correspond to the vertical height VD in the planning unit 20 (FIG. 2) Dimensional work image 1d. 2). After the three-dimensional design information 14d of the temporary prosthesis is obtained based on the obtained three-dimensional work image 1d, the temporary prosthesis (refer to FIG. 2) 14).

Therefore, since the temporary prosthesis 14 is integrally manufactured up to the temporary gingival portion 15, the temporary tooth portion 16, and the coupling region 19 in which the shape of the inner circumferential surface of the supporting cylinder is replaced, the manufacturing convenience is remarkably improved . Since the design information 14d of the provisional prosthesis is set based on each of the scanning images 2d and 3d obtained by directly scanning the oral cavity, the degree of matching with the inside of the oral cavity can be remarkably improved while being easy to design. Furthermore, the provisional prosthesis 14 including the coupling region 19 is accurately installed and corrected in the oral cavity, so that the accuracy and precision of the digital prosthesis (300 of FIG. 8) designed and manufactured on the basis of the corrected temporary prosthesis Can be significantly improved.

Meanwhile, referring to FIG. 5, the provisional prosthesis 14 is installed in the oral cavity. At this time, the mold recess 17 including the engagement region 19 and the engagement tooth 17 on the side of the confrontation arch 3 are formed such that the engagement portion 91 of the abutment is engaged with the protruded object arch 2, A correction scanning image (1f in Fig. 6) for the provisional prosthesis 14 in which the occlusal surface portion 18 to be occluded is corrected is obtained (s120 in Fig. 1).

In detail, when the provisional prosthesis 14 is installed in the oral cavity and is occluded with the cervical arch 3, the surface profile of the cervical groove 17 and the occlusal surface portion 18 are changed by the occlusal pressure, Is corrected to correspond to the surface profile of the confrontation arch (3).

At this time, a curable resin is applied to one side of the mold recess 17 and the engagement region 19, and the mold can be installed in the target arch 2 where the engagement portion 91 of the abutment protrudes. When the curing resin is pressed by the occlusal pressure, the gap between one side of the mold recess 17 and the engagement region 19, the surface of the target arch 2 and the engagement portion 91 of the abutment, Can be corrected by the above-mentioned curable resin. As the curable resin is cured and fixed, the inner surface profile of the mold recess 17 and the coupling area 19 can be corrected to a profile including the mold interposing surface portion r11 formed by the curable resin .

In addition, the occlusal surface portion 18 can be adjusted to be optimized in accordance with the cutting sensitivity of the subject to be cut, based on the chewing shake of the opposed tooth on the side of the opposing arch 3 formed by the occlusion pressure. Whereby a surface profile of the occlusal surface portion 18 can be corrected to a profile including an occlusal correction surface portion r12 that matches the opposed tooth.

Then, the mold recesses 17 including the engagement region 19 and the entire outer surface of the provisional prosthesis 14, to which the occlusal surface portion 18 is corrected, are scanned by using the imaging device 10 (Fig. 2) . Thereby, a profile image (rp11 in Fig. 6) and a profile image (rp12 in Fig. 6) of the occlusion correcting surface portion of the mold side can be obtained to generate the corrected scanning image (1f in Fig. 6).

That is, the present invention is characterized in that the provisional prosthesis 14, which is primarily manufactured based on the scanning images 2d and 3d for the object arch 2 and the confrontation arch 3, is installed as an intraoral substance, And the abutment 91 of the abutment placed in the subject arch. Therefore, the design information of the digital prosthesis (300 in FIG. 8) that is finally manufactured based on the corrected scanning image (1f in FIG. 6) obtained by scanning the corrected temporary prosthesis 14 as described above can be accurately obtained have. In addition, even when there is no prosthesis in use, the provisional prosthesis 14 can be used not only temporarily but also practically during the manufacturing period of the digital prosthesis (300 of FIG. 8). Therefore, the dual function of the information acquisition function and the temporary use function is provided through the temporary prosthesis 14, so that the usability and economical efficiency can be remarkably improved.

Furthermore, the provisional prosthesis 14 is provided with the curing resin on one side of the mold recess 17 and the coupling area 19, and is provided in the oral cavity in the state where the curable resin is applied, The mold recess 17 including the engagement region 19 and the occlusal surface portion 18 are precisely corrected. Therefore, the intraoral placement accuracy of the digital prosthesis (300 of FIG. 8) designed and manufactured on the basis of the three-dimensional surface information of the temporary prosthesis 14 thus corrected can be remarkably improved.

FIG. 6 is a view illustrating a process in which a digital prosthesis is designed based on a corrected scanning image in a digital prosthesis manufacturing method according to an embodiment of the present invention. FIG. 7 is a view illustrating a digital prosthesis manufacturing process according to an embodiment of the present invention. FIG. 8 is an exploded perspective view of a digital prosthesis manufactured according to an embodiment of the present invention. Referring to FIG.

6 to 8, virtual connecting grooves corresponding to the position and shape of the coupling region 19f are formed in the inner surface profile set according to the three-dimensional surface information 17f of the corrected mold groove. In addition, the occlusal surface portion is set according to the corrected three-dimensional surface information 18f of the occlusal surface portion so that the digital prosthesis 300 is designed and manufactured (s130 in FIG. 1).

More specifically, the provisional tooth portion (16 in Fig. 5) is corrected to the occlusal correction surface portion (r12 in Fig. 5) profile and the temporary gum portion (15 in Fig. 5) (FIG. 5) is obtained by scanning the temporary prosthesis (14 in FIG. 5) corrected by the imaging device (20 in FIG. 2) to obtain the corrected scanning image (1f). Therefore, the corrected scanning image 1f is generated by including the provisionally corrected temporary tooth image corresponding to the profile image rp11 of the occlusal correction surface portion, the three-dimensional surface information 18f of the occlusal surface portion. In addition, the corrected scanning image 1f is generated so that the three-dimensional surface information 17f of the mold groove includes the provisionally corrected temporary gingival image corresponding to the profile image rp12 of the mold side surface portion.

In the correction scanning image 1f, a boundary region (x) selected and input along the outer side of the mold groove and a merged region m1 and an occlusal region (m1) are formed based on the connection between the temporary tooth and the temporary gingival section m2 is set. In this case, the merging area m1 includes the three-dimensional surface information 17f of the corrected mold groove and the three-dimensional surface information 19f of the combining area, and the occlusion area m2 includes the corrected And three-dimensional surface information 18f of the occlusal surface portion.

Then, when the corrected three-dimensional surface information of the temporary prosthesis excluding the fusion region m1 and the occlusion region m2 is deleted, the inner surface information of the fusion region m1 is exposed, Lt; / RTI >

At this time, the three-dimensional surface information of the temporary prosthesis may be stored by connecting a plurality of points having predetermined coordinate values corresponding to the external shape information of the temporary prosthesis included in the corrected scanning image 1f.

For example, the three-dimensional surface information of the temporary prosthesis may be stored as an STL file (stereolithography file), and is set to have a plurality of triangular surfaces by a plurality of points and a line connecting them according to the outer shape of the temporary prosthesis . Therefore, the corrected scanning image 1f of the temporary prosthesis can be stored as a three-dimensional surface model whose interior is substantially hollow.

Here, the three-dimensional surface information of the temporary prosthesis includes three-dimensional surface information about an outer surface portion of a temporary tooth portion where the surface is substantially convexly displayed and a temporary gingival portion that is convexly displayed while surrounding the lower end portion of the temporary tooth portion do. When the fusion region m1 and the occlusion region m2 are set along the boundary region x and the connection between the temporary tooth region and the temporary gingival region, The inner surface side surface information of the merged area m1 may be exposed to the outside.

At this time, since the three-dimensional surface information of the temporary prosthesis is stored as surface information having substantially no thickness, the coordinate values for the inner surface side profile and the outer surface side profile of the fusion region m1 are the same. Therefore, the design information of the mold groove and the engaging groove 302a of the digital prosthesis 300 on the basis of the three-dimensional surface information 17f, 19f of the mold recess and the engaging area in which the erasure area d is deleted and exposed Can be obtained precisely.

That is, according to the present invention, there is provided a method of scanning a temporal prosthesis 14 that has been corrected for correct occlusion and fusion in the oral cavity to remove an unnecessary portion from the acquired image, The three-dimensional surface information 17f, 19f, and 18f can be obtained. Therefore, the precision of the digital prosthesis 300 can be significantly improved since the design information precisely corresponding to the protruded object arch and the concave arch is clearly obtained by acquiring the abutment of the abutment.

At this time, the three-dimensional surface information (17f, 19f, 18f) of the mold recess, the engaging region and the occlusal surface portion displayed in the corrected scanning image (1f) is determined by the profile image rp11 of the mold- Respectively, with the profile image rp12. Therefore, the three-dimensional surface information (17f, 19f, 18f) of the mold groove, the engagement region and the occlusal surface portion substantially matches the target arch and the archery arch protruding from the engagement portion of the abutment, The installation accuracy of the digital prosthesis 300 designed and manufactured can be remarkably improved.

Further, the three-dimensional surface information 19f of the coupling region corresponds to the inner circumferential surface shape of the supporting cylinder so that the provisional prosthesis (14 in FIG. 5) can be substantially installed in the target arch via the fastening screw, Is installed in the target arch and corrected to be precisely matched with the engagement portion of the abutment. In addition, the three-dimensional surface information 18f of the occlusal surface portion is formed so that the temporary prosthesis (14 in Fig. 5) is installed in the target arch, but the burden on the jaw joint is minimized during the occlusion or chewing with the confrontation arch, Corrected.

Therefore, the digital prosthesis 300 designed and manufactured on the basis of the corrected scanning image 1f obtained by scanning the provisional prosthesis can be remarkably improved in the mating and occlusal reliability, and as it is stably installed in the oral cavity, The discomfort of the subject can be minimized.

As a matter of course, the digital prostheses 300 (300) may be reversed so that the mold recesses and the one end image of the coupling region, which are concavely displayed in the three-dimensional surface information of the temporary prosthesis shown in the corrected scanning image 1f, As the design information of the mold groove and the engaging groove 302a.

7, the virtual abutment 800d extracted from the digital library corresponding to the abutment placed in the target arch may correspond to the three-dimensional surface information 19e at one end of the coupling region, . Then, the three-dimensional surface information 19e of the one end of the coupling region is alternatively corrected along the outer region of the virtual arrangement virtual dent 800d. At this time, the one end of the coupling region is a portion substantially matching the coupling portion profile of the abutment, and is understood to be the coupling end side of the support cylinder.

Here, the digital library is preferably understood as a database that includes digital contour information of components or components for designing an artificial periodontal tissue. Such a digital library may store digital appearance information of a plurality of physical abutments and the above-mentioned temporary tooth portion and template design information digital appearance information of the temporary gingival section.

In detail, the digital library stores a plurality of digital appearance information corresponding to linear standard abutments and bending type multi abutments of various standards. Therefore, the digital outer shape information of the virtual abutment 800d replacing the three-dimensional surface information 19e at the one end of the coupling region can be obtained from the digital shape information of the fixture according to the setting angle of the fixture, Can be extracted from the library.

A matching reference point is set and input to a corresponding portion of the coupling portion of the virtual abutment 800d and the three-dimensional surface information 19e of the one end portion of the coupling region. At this time, the matching reference point input to the three-dimensional surface information 19e on one side of the coupling region can be automatically set or manually entered as an image distortion or a damaged portion. In addition, the matching reference point on the coupling portion side of the virtual abutment 800d may be automatically set or manually input at a position corresponding to the matching reference point set and inputted to the three-dimensional surface information 19e at one end of the coupling region.

The virtual abutment 800d is arranged such that the matching reference points of the respective objects are overlapped with each other. Accordingly, even if the three-dimensional surface information 19e at one end of the coupling region is indefinitely displayed due to stitches, foreign substances, or image distortion that may occur in the scanning process, the virtual abutment 800d can not correct Lt; / RTI > At this time, since the virtual abutment 800d is digital data substantially corresponding to the abutment placed in the subject arch, the coupling groove formed in the digital prosthesis can be set to substantially match the abutment have.

The digital library may further include three-dimensional design information of a virtual gingival portion and a virtual tooth portion for designing the digital prosthesis. Then, the virtual tooth portion and the virtual tooth portion are extracted from the digital library and are virtually arranged in the corrected scanning image (1f).

In detail, the virtual tooth portion and the virtual gum portion are arranged so as to correspond to the temporary tooth portion and the temporary gum portion displayed in the corrected scanning image (1f), respectively, and the occlusal surface portion of the virtual tooth portion and the inner surface profile of the virtual gum portion Corrected by the profile image rp12 of the occlusal correction surface portion and the profile image rp11 of the mold side surface portion. Accordingly, the virtual gingival section may be set so that the three-dimensional surface information 17f of the corrected mold groove is matched and substituted and accurately matched to the surface of the subject arch. The virtual tooth portion may be set so that the three-dimensional surface information 18f of the corrected occlusal surface portion is matched and substituted to be precisely interlocked with the opposing arch-side confrontation tooth.

The virtual digital prosthesis including the virtual tooth portion and the virtual gingival portion is arranged in the correction scanning image (1f), and the virtual digital prosthesis is designed in accordance with the overlapping region between the virtual digital prosthesis and the virtual abutment The virtual coupling grooves may be matched in the information.

That is, the inner surface profile of the virtual gum part is set based on the three-dimensional surface information 17f of the mold groove included in the corrected scanning image 1f, Is replaced with the virtual abutment 800d. At this time, since the overlap region between the virtual abutment 800d and the virtual gingival section is set as the virtual engagement groove, the digital prosthesis 300 manufactured on the basis of the virtual abutment groove can be accurately installed and fixed in the oral cavity.

Accordingly, the present invention is characterized in that the three-dimensional surface information (17f) of the corrected concave portion, the three-dimensional surface information (19f) of the combined region and the three-dimensional surface information of the occlusal surface portion The final design information of the digital prosthesis can be obtained by adding up the final design information 18f. Accordingly, the shape, position, and direction of the virtual coupling groove can be precisely designed accurately reflecting the actual position and orientation of the fixture / abutment placed in the target arch, and the combination of the digital prosthesis 300 The groove 302a can be formed accurately.

In addition, one-side end three-dimensional surface information 19e of the coupling region displayed in the corrected scanning image 1f is set based on the virtual abutment 800d extracted from the digital library and replaced. Accordingly, the accuracy of matching with the fixture / abutment placed in the target arch can be remarkably improved. In other words, when orthoscopic scanning using an oral scanner is performed, distortions due to oral saliva such as vibrations / tremors and saliva due to movement of the head, tongue, etc. of the subject to be prosthodontacted are eliminated, thereby obtaining accurate images.

Referring to FIG. 8, the digital prosthesis 300 includes a denture frame 302 and a crown bridge 301. Further, it is preferable that a cover portion 350 such as a ceramic material is matched with the color of the gums at the lower portion thereof so that the denture frame 302 made of a metal is not visually exposed. Of course, instead of providing the cover part 350 separately, an extension corresponding to the color of the gum may be formed in the lower part of the denture frame 302 and post-processed.

In detail, the denture frame 302 may be formed of a ceramic or a metal material having high strength and biocompatibility at a portion corresponding to the provisional gingiva (15 in Fig. 5) of the temporary prosthesis (14 in Fig. 5) . A plurality of support protrusions 302b are formed on one side of the denture frame 302 and the other side of the crown bridge 301 is coupled to the other side. In the mold recess, the engaging groove 302a is formed at a position matching the virtual engaging groove. The crown bridge 301 is formed of a ceramic or a metal material having high strength and biocompatibility at a portion corresponding to the provisional tooth portion (16 in Fig. 5) of the temporary prosthesis (14 in Fig. 5) A support groove portion 301a into which the support protrusion portion 302b is inserted is formed.

At this time, although the digital prosthesis 300 can be manufactured by a three-dimensional printer, it is more preferable that the digital prosthesis 300 is manufactured by a milling and cutting device for high precision processing without restriction of a work material. Thereby, an artificial prosthesis having high machining accuracy and durability can be provided.

As described above, according to the present invention, the fixture and the abutment are prepared on the basis of the respective scanned images (2d, 3d) of the target arch and the opposed arch, The design information of the digital prosthesis 300 that is finally manufactured through the temporary prosthesis 14 is accurately obtained. In addition, since the provisional prosthesis 14 can be actually used even in the absence of a prosthesis or a denture in use, usability and convenience in a procedure can be remarkably improved.

Since the temporary prosthesis 14 is formed integrally with the temporary gingival portion 15, the temporary tooth portion 16, and the coupling region 19 into which the coupling portion of the abutment is inserted, it is difficult to assemble the separate supporting cylinder The manufacturing convenience can be remarkably improved. Since the design information of the digital prosthesis 300 is acquired through the corrected scanning image 1f obtained in a corrected state through the actual installation process of the temporary prosthesis 14, .

Further, as the provisional prosthesis 14 is occluded after being installed in the oral cavity, the voids on the mold recess 17 and the side of the engagement region 19 are filled with the curable resin and are easily corrected, Can be clarified. In addition, since the coupling area 19f included in the corrected scanning image 1f is replaced with the three-dimensional design information of the abutment, the coupling groove 302a fixed to the position of the actual fixture / abutment The formed digital prosthesis 300 can be manufactured.

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.

100: Digital prosthesis manufacturing system 10: Imaging device
10: Planning part 30: Manufacturing device
14: Temporary prosthesis 300: Digital prosthesis
1d: 3D working image 1f: Correction scanning image

Claims (6)

A temporary tooth comprising an occlusal surface portion on one side corresponding to an occlusal surface corresponding to the three-dimensional work image obtained on the surface information of the target arch and the occlusion information with the confrontation arch, And a temporary gum portion including a mold recess formed so as to correspond to the surface information of the subject arch on the other side of the abutment portion, A first step in which a prosthesis is designed and manufactured;
Wherein the prepared temporary prosthesis is provided in the oral cavity and a mold recess including the engagement region so that the abutment is fitted to the target arch is provided and the temporary prosthesis in which the occlusal surface portion occluded in the engagement arch is corrected A second step in which a corrected scanning image is acquired; And
Wherein an imaginary coupling groove corresponding to a position and a shape of the coupling region is formed in an inner surface profile set according to three-dimensional surface information of the corrected mold groove, and an occlusal surface portion is formed according to the three-dimensional surface information of the corrected occlusal surface portion And a third step in which the digital prosthesis is designed and manufactured,
The second step may include a step of setting the surface profile of the mold recess and the occlusal surface portion including the engagement region by the occlusal pressure when the temporary prosthesis is provided in the oral cavity and in the occlusion with the confronting arch, Wherein the merged area and the occluded area are set in the corrected scanning image obtained by scanning the entire outer surface of the corrected temporary prosthesis, Wherein the corrected three-dimensional surface information of the temporary prosthesis excluding the occlusal region is erased to expose inner surface side information of the combined region,
Wherein in the third step, the inner surface profile of the digital prosthesis is replaced with the inner surface side surface information of the exposed fused area. The method according to claim 1,
Wherein the first step further includes obtaining a scanning image of the target arch where the abutment of the abutment is protruded, wherein the occlusion information is determined according to the optimized authoring sensitivity at the occlusion of the target arch and the antagonism arch, And the calculated vertical height. delete The method according to claim 1,
The third step includes the steps of: arranging the virtual abutment extracted from the digital library corresponding to the abutment so as to correspond to the three-dimensional surface information of the coupling region, The three-dimensional surface information of the coupling region is alternately corrected;
Wherein the virtual gingival portion and the virtual tooth portion are extracted from the digital library and fictitiously arranged in the correction scanning image so that the corrected virtual abutment surface information is matched and substituted, A virtual digital prosthesis including the virtual tooth portion that has been compensated for,
Wherein the digital prosthesis is designed by matching the virtual digital prosthesis and the virtual coupling groove according to the overlapping area between the virtual digital prosthesis and the virtual abutment. The method according to claim 1,
Further comprising the step of aligning and replacing the engagement ends of the support cylinders in the engagement region in the first step. And an abutment surface portion provided in the oral cavity, the abutment surface portion corresponding to an occlusion with the abutment arch, and an abutment profile of the abutment corresponding to the abutment surface profile of the abutment, An imaging device that acquires a corrected scanning image for a temporary prosthesis in which a mold groove including a coupling region formed corresponding to the mold recess is corrected;
Designing a provisional prosthesis in which one side is mated with the confronting arch and the other side is matched with the surface information of the target arch, and a coupling area formed in the inside corresponding to the coupling profile of the abutment is arranged and arranged, Setting a combined area and an occlusal area in the image, deleting the corrected three-dimensional surface information of the temporary prosthesis excluding the combined area and the occlusal area, and correcting the exposed three- Wherein the three-dimensional surface information of the mating surface portion and the occlusal surface portion is replaced with the profile image of the mold-overlapping front surface portion and the profile image of the occlusal correction surface portion, respectively, And forming a virtual engaging groove corresponding to the shape of the occlusal surface, Planning unit to set the design surface digital prosthesis; And
And a manufacturing apparatus for manufacturing the temporary prosthesis and the digital prosthesis designed as described above.

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