TWI786382B - Digital abutment and method for manufacturing dental restoration using the same - Google Patents

Abstract

In order to improve the convenience of operation and the scanning recognition rate, the present invention provides a method for manufacturing a dental restoration using a digital abutment, including: the first step, scanning the dental arch of the object implanted in the digital abutment through an oral scanner, wherein the digital abutment The upper part of the abutment is formed with an inherent identification mark for scanning image processing and identification; in the second step, the surface information of the digital abutment and the object dental arch scanned by the oral scanner is converted into a three-dimensional image by scanning image processing digital data, and acquire the three-dimensional digital data to generate a three-dimensional working image, and the three-dimensional working image includes the surface information of the digital abutment converted into three-dimensional digital data; the third step is corresponding to the intrinsic The virtual abutment extracted from the digital library is virtually configured and replaced in the three-dimensional working image, and the design information of the artificial crown with the virtual matching groove corresponding to the virtual abutment is generated. and the fourth step, corresponding to the design information to finally manufacture the artificial crown.

Description

Digital abutment and method for manufacturing dental restoration using the same

The invention relates to a digital abutment and a method for manufacturing a dental restoration using it, and more specifically relates to a digital abutment with improved operation convenience and scanning recognition rate and a manufacturing method for a dental restoration using the digital abutment.

Generally, dental restorations including dentures and fillings refer to artificial periodontal tissue in the oral cavity that replaces missing teeth and artificially restores their appearance and function.

In detail, if the state of missing natural teeth is left alone, dentition deformation will occur in the adjacent teeth and mating teeth of the missing teeth, which will lead to deformation of the facial shape, reduce chewing function, and increase the inconvenience of daily life. Furthermore, if the natural tooth is kept missing for a long time, the alveolar bone surrounding the missing tooth will be absorbed in the body, making it difficult to install artificial periodontal tissue. At this time, the dental restoration is installed inside the oral cavity to restore the chewing function and prevent the deformation of the periodontal tissue. According to the number of missing teeth, it can be divided into partial/full dentures and partial/full fillings.

On the other hand, the denture is glued to the surface of the gum by coating the matching groove on the inner side with a dental adhesive, and the filling can be set by a fixture implanted in the alveolar bone. At this time, the dentures are supported outside the gums, causing deformation of the gums or a large amount of foreign body sensation. Therefore, there is a recent tendency to increase the amount of fillings supported by alveolar bone.

Specifically, a plurality of fixed bodies are implanted along the dental arch at a set interval along the gum, the fixed bodies can support the filling, and are combined with the abutment at the upper end. Then, fastening portions fixed to the upper ends of the abutments are formed at positions of the filler corresponding to the respective upper ends of the abutments.

Then, the conventional abutment includes: a coupling protrusion coupled to the upper end of the fixed body; an edge portion provided on the upper side of the coupling protrusion and inside the soft tissue of the gum; a coupling portion provided on the edge part, and combined with the fastening part.

At this time, the fastening part is used as a supporting cylinder, and the supporting cylinder is vertically arranged corresponding to each position of the abutment, or the fastening part can be formed by a fastening groove, and the fastening groove and the The contour of the upper end of the abutment is correspondingly recessed in the vertical direction. That is, the joint portion of the abutment is actually inserted into the fastening portion and fixed by a fixing tool, whereby the filler can be placed inside the oral cavity.

On the other hand, FIG. 1 is an exemplary diagram showing a conventional base station.

Referring to FIG. 1 , conventional abutments can be provided in various sizes and shapes to correspond to the size and shape of the treated person's gums and fixtures, and each type of abutment is assigned a unique model. At this time, conventionally, the model number is marked on the side surface of each of the bases by means of laser engraving or the like.

Specifically, conventional abutments are set with various diameters to correspond to the diameter of the fixed body, and the joint portion (that is, post) is set with various heights to correspond to the height of the filler. . In addition, the edge portion (ie, cuff) may be set at various heights to correspond to the height of the gums of the person being treated.

However, the conventional abutment has a problem that when installed inside the oral cavity of the subject, the part marked with the model number is buried by the soft tissue of the oral cavity, and the type of the abutment cannot be visually identified.

In addition, there is a problem that the above-mentioned bases with various sizes and shapes are difficult to distinguish with the naked eye because they are manufactured in a small size of several millimeters even if they have different sizes and shapes.

In particular, there is a problem that if the edge portion of the conventional abutment is inserted inside the soft tissue of the gum, the edge portion is not exposed to the outside of the gum, so the cuff cannot be visually recognized, and it is difficult to confirm the base. The type of table.

Accordingly, there is a serious problem that a filler that does not correspond to an abutment installed in the oral cavity is produced and installed in the oral cavity of the patient due to a simple mistake of the treating personnel. Therefore, the degree of matching between the bonding portion and the fastening portion is lowered, and there arises a problem that the accuracy of placement of the final dental restoration placed inside the oral cavity is lowered.

[technical problem]

In order to solve the above-mentioned problems, an object of the present invention is to provide a digital abutment with improved convenience in operation and scan recognition rate, and a method of manufacturing a dental restoration using the digital abutment. [Solution to problem]

In order to solve the above-mentioned problems, the present invention provides a method for manufacturing a dental restoration using a digital abutment, including: a first step, scanning the dental arch of the object implanted with a digital abutment through an oral scanner, wherein the upper part of the digital abutment forms There is an inherent identification mark for scanning image processing and identification; in the second step, the surface information of the digital abutment and the object dental arch scanned by the oral scanner is transformed into three-dimensional digital data through scanning image processing, and Acquiring the three-dimensional digital data to generate a three-dimensional working image, the three-dimensional working image includes the surface information of the digital base that has been converted into three-dimensional digital data; the third step, corresponding to the inherent identification of the digital base from the digital The virtual abutment extracted from the library is virtually configured in the three-dimensional working image and replaced to generate design information of an artificial crown with a virtual matching groove corresponding to the outer contour of the virtual abutment; And the fourth step, corresponding to the design information, the artificial dental crown is finally manufactured.

In addition, the present invention provides a digital abutment for generating design information of an artificial dental crown corresponding to a virtual abutment, wherein the virtual abutment is digitally digitized into a three-dimensional virtual configuration in a three-dimensional working image through scanning image processing and Extracted from the digital library, the digital abutment includes: fastening protrusions, with six protrusions formed on the outside, to match the six grooves formed on the inner surface of the upper end of the fixed body implanted in the alveolar bone, through the inside A through hole is formed to insert a fastening screw fastened with the fixed body through an intermediary; the edge part is arranged integrally on the upper side of the fastened protrusion, and is formed by a shape corresponding to the peripheral part of the gum implanted in the fixed body. The outer contour of the groove is formed to be arranged inwardly of the soft tissue of the gum; A matching groove formed in the lower part of the artificial crown of the oral cavity of the treated person, and a communication hole is formed, and the communication hole is communicated with the through hole and forms a protrusion that clamps the head of the fastening screw; The inherent identification mark, provided as a visible reference index, is marked on the upper part of the joint, so as to be visually identified, and then individually matched with the virtual abutment stored in the digital library. [Effect of the invention]

Through the above solution, the present invention provides the following effects: First, the three-dimensional working image is an image of various types of digital abutments implanted in the oral cavity provided in a tiny size, and the accurate corresponding virtual abutment is extracted from the digital library using the three-dimensional working image In the process of visually recognizing the inherent identification mark corresponding to the size and shape of the digital abutment, the artificial crown matching the virtual abutment can be accurately designed, and the interference to the treatment personnel can be prevented before it happens. Second, after the edge of the digital abutment is inserted into the soft tissue of the gums, an inherent identification mark is formed in the shape of a groove corresponding to the size and shape of the digital abutment on the upper part of the joint, which is easy to recognize with the naked eye, so it is possible to prevent treatment due to Implantation of artificial dental crowns by mistake can improve the convenience of operation. Thirdly, the scanning recognition rate is improved through the inherent identification mark of the groove shape formed on the low-recognition surface of the scanned joint part, thereby also actually eliminating the difference between the digital base of the real object and the three-dimensional digital data transformed accordingly. The slight error between them can obtain accurate three-dimensional working images. Fourth, the virtual abutment automatically extracted from the digital library corresponding to the inherent identification mark is virtually configured in the three-dimensional working image and replaced, so that an accurate artificial abutment corresponding to the outer contour of the virtual abutment can be generated. Information about the design of the crown, from which the accuracy of the final manufactured dental restoration can be significantly improved. Fifth, an inherent identification mark is formed in the shape of a groove on the upper part of the joint part, and when the inner surface contour of the matching groove of the artificial dental crown corresponding to the outer contour of the joint part matches, the contact surface area filled with cured resin is maximized, thereby increasing the adhesive force, thus improving the bonding force with the digital abutment when the artificial dental crown is placed in the oral cavity.

[preferred specific implementation]

The most preferred embodiment of the present invention will be described in more detail below with reference to the accompanying drawings. [detailed description]

Hereinafter, a digital abutment according to a preferred embodiment of the present invention and a method for manufacturing a dental restoration using the same will be described in detail with reference to the accompanying drawings.

Fig. 2 is a flowchart illustrating a method for manufacturing a dental restoration using a digital abutment according to an embodiment of the present invention. 3a and 3b are perspective views illustrating a digital base station according to an embodiment of the present invention. Fig. 4a and Fig. 4b are the three-dimensional views showing the digital base station of the first modified example of an embodiment of the present invention; Fig. 5a and Fig. 5b are the digital base station shown in the second modified example of an embodiment of the present invention stereogram. Next, FIG. 6 is an exemplary diagram showing a three-dimensional working image in a method of manufacturing a dental restoration using a digital abutment according to an embodiment of the present invention.

As shown in Fig. 2 to Fig. 6, the dental restoration manufacturing method using digital abutments according to an embodiment of the present invention includes a series of steps as follows: scanning the object dental arch (s10) implanted with digital abutments, generating three-dimensional working image (s20), generate design information of the artificial dental crown (s30), and finally manufacture the artificial dental crown (s40).

This method of manufacturing a dental restoration using a digital abutment is preferably carried out by a dental restoration manufacturing system comprising a planning section. Specifically, each image data such as a plurality of scanned images and CT images is acquired by an imaging device such as a dental scanner or a computerized tomography scanner, and is transmitted to the planning unit. Then, a three-dimensional working image as final image data is generated through an image processing process of aligning, overlapping, exchanging, modifying or integrating a plurality of the scanned images and the CT images by the planning unit. In addition, in order to accurately match the oral cavity of the patient based on the generated three-dimensional working image, the planning unit generates a virtual artificial crown as design information of the artificial crown.

Here, the planning unit includes: a storage unit for saving each image data; and a processing unit for processing each image data to generate a comprehensive scan image, the three-dimensional working image, and the virtual artificial dental crown. In addition, it includes an input unit and an output unit, wherein the input unit is used to input information and control commands to the processing unit, and the output unit outputs the input information and control commands, generated data, such as various image data and the three-dimensional working image, the virtual artificial dental crown, and the like.

Furthermore, the planning unit may further include a communication unit that receives each image data or transmits each image data or generated data to an external device. That is, each image data acquired by the imaging device is transmitted to the planning unit through the communication unit, and each image data or produced data is transmitted to the external device through the communication unit. At this time, the external device should preferably be understood as a manufacturing device capable of manufacturing a physical artificial dental crown corresponding to the virtual artificial dental crown, such as a three-dimensional printer or a milling machine.

On the other hand, the method of manufacturing a dental restoration using a digital abutment according to the present invention will be described in detail below. Firstly, scan the dental arch of the object implanted in the digital abutment 100, 200, 300 by an oral scanner, wherein the upper part of the digital abutment 100, 200, 300 forms an inherent identification mark 14a, 14b, 14c (s10).

Here, it is preferably understood as follows: the target dental arch refers to the palate on which the dental restoration is actually placed; the oppressive dental arch refers to the palate that occludes with the target dental arch. Hereinafter, an example in which the object dental arch is the lower jaw and the counter dental arch is the upper jaw is shown and described as an example.

Then, in order to fix an artificial crown replacing the natural teeth in the oral cavity of an edentulous or partially edentulous patient missing most of the natural teeth, it is preferable to implant a fixture in the alveolar bone of the subject's dental arch. In this case, it is preferable to provide the digital abutment 100, 200, 300 to mediate the connection between the fixed body and the artificial dental crown.

Here, the fixed body is actually implanted vertically on the alveolar bone on the anterior tooth side, especially on the molar side of the mandible, the fixed body can be implanted obliquely at a set angle to prevent damage caused by contact or aggravation. Compression of the alveolar nerve causes damage.

Then, the upper end of the fixed body is recessed to form an inner peripheral groove to insert and fasten the fastening protrusion 11 of the digital base 100, 200, 300, and preferably on the inner peripheral edge of the inner peripheral groove Concaves along the circumferential direction form six grooves.

On the other hand, the digital base station 100 , 200 , 300 according to an embodiment of the present invention includes: a fastening protrusion 11 , an edge portion 12 , a joint portion 13 and an inherent identification mark 14 a , 14 b , 14 c.

Here, the digital abutment 100, 200, 300 is preferably understood as the following device: used to generate the design information 400d of the artificial dental crown corresponding to the virtual abutment 100k, and the virtual abutment 100k scans the image The process is digitized in 3D and virtualized in 3D working image 1d and extracted from the digital library.

In detail, the fastening protrusion 11 may be formed by an outer contour whose radius expands from the lower side to the upper side, and may have a hollow inner contour shape penetrating in the vertical direction.

Then, preferably, on the outer peripheral surface of the fastening protrusion 11, six protrusions 11a are formed corresponding to the six grooves along the circumferential direction, and then matched with the inner peripheral surface of the upper end of the fixed body implanted in the alveolar bone. The six slots formed.

At this time, the six protrusions 11a may form a plurality of planes curved at predetermined intervals in the circumferential direction outside the lower end side of the fastening protrusion 11 . Here, in an embodiment of the present invention, the case where the overall shape of the planes of the six protrusions 11a formed along the circumferential direction forms six faces is illustrated, but it is not limited thereto. Accordingly, the combination direction of the digital abutment 100, 200, 300 can be easily determined by the simple method that the six protrusions 11a are matched to the six grooves of the fixed body, and the number of the digital abutment 100, 200 can be limited. , 300, can prevent rotation before it happens.

Then, preferably, a through hole is formed through the inside of the fastening protrusion 11 to insert a fastening screw intermediary in fastening with the fixed body. Specifically, a through hole and a communication hole 13e described later are formed through the digital base 100, 200, 300 in the vertical direction, and the through hole and the communication hole 13e are preferably communicated with each other. At this time, it is preferable to understand that the through hole is formed inside the fastening protrusion 11 and the communication hole 13 e is formed inside the coupling portion 13 .

In addition, it is preferable to form a bump portion that protrudes from the inner periphery of the digital base 100 , 200 , 300 between the through hole and the communication hole 13e radially inwardly. One. At this time, a head that expands radially outward along the circumferential direction is formed at one end of the fastening screw, and threads are formed on the outer periphery of the other end to be screw-fastened to the inner peripheral groove at the upper end of the fixing body.

Then, the head of the fastening screw can be caught and restrained by a protruding portion protruding from the inner circumference between the through hole and the communication hole 13e radially inwardly. into one. In this case, it is preferable to understand that the protrusion portion is formed by the inner diameter of the through hole being smaller than the inner diameter of the communication hole 13 . In addition, the fastening screw may be extended to a length capable of connecting the protrusion portion and the inner peripheral groove of the upper end portion of the fixed body.

According to this, while the head of the fastening screw is caught by the protrusion, the other end of the fastening screw is fastened to the inner peripheral groove of the upper end of the fixed body, so that the digital abutment 100, 200, 300 and the fixed body can stably constrain each other.

On the other hand, it is preferable that the edge portion 12 is integrated with the upper side of the fastening protrusion 11 to form an outer contour corresponding to the shape of the peripheral portion of the gum in which the fixed body is implanted, so that the soft tissue of the gum Inside configuration.

Here, preferably, the edge portion 12 forms an outer contour on the upper part of the fastening protrusion 11 that is actually connected to the surface of the gum, so as to prevent foreign matter from flowing into the inside of the gum. At this time, the edge portion 12 may be formed in a shape that increases in diameter from the lower side to the upper side so that the edge portion 12 is disposed toward the inner side of the soft tissue of the gum.

Then, the upper surface 12a of the edge portion 12 is integrally formed with the outer surface of the joint portion 13 and constitutes a drop, protrudes from the outer surface of the joint portion 13 in the radial direction outward, and can support the joint joint 13. The lower end of the artificial tooth crown.

At this time, it is preferable to understand that the lower part of the digital abutment 100 , 200 , 300 is disposed toward the inner side of the gum based on the upper part 12 a of the edge part 12 , is fastened to the fixed body, and the upper part is exposed on the gum. of the exterior.

Here, the length in the vertical direction of the edge portion 12 , that is, the cuff may be set differently for each of the digital base stations 100 , 200 , and 300 . At this time, the digital abutment 100 , 200 , 300 may be selected and installed by the treating person, and the digital abutment 100 , 200 , 300 may be provided as a cuff corresponding to the height of the gum of the patient to be treated.

On the other hand, the joint portion 13 is configured integrally on the upper side of the edge portion 12, and is preferably configured to actually correspond to the outer contour of the inner surface contour of the matching groove, so as to match the shape of the groove placed on the patient to be treated. A matching groove is formed in the lower part of the artificial crown of the oral cavity.

Here, an alignment groove portion 13b may be formed on the side portion 13a of the coupling portion 13, and the alignment groove portion 13b is recessed and extended in a circumferential direction or a front-rear direction along the outer surface. Although not shown, according to the situation, the alignment grooves 13b may be configured as hexagonal hexagonal surfaces corresponding to the six protrusions 11a and the six grooves.

In addition, at least one notch 13 c may be formed on the side surface 13 a of the coupling portion 13 . Here, the alignment groove portion 13b and the cutout portion 13c are preferably formed to provide visible reference indicators for the implantation direction when the digital abutment 100 , 200 , 300 is combined with the fixed body. Accordingly, even if the fastening protrusion 11 is inserted inside the upper end of the fixed body to block the visible reference index, the treatment personnel can visually confirm the alignment groove 13b and the cutout 13c, which can easily The fastening direction of the digital abutment 100, 200, 300 is judged. Accordingly, the installation convenience of the digital base stations 100, 200, 300 can be significantly improved.

In addition, the coupling part 13 is integrally configured on the upper part of the edge part 12 to be inserted into and matched with the matching groove of the artificial dental crown. At this time, the surface roughness of the bonding portion 13 may also be processed. Accordingly, processing the surface roughness of the joint part 13 improves the scanning recognition rate when scanning the oral cavity, and at the same time, the adhesive substance filled between the matching groove of the artificial tooth crown and the outside of the joint part 13 can Further improve the binding force.

Then, it is preferable to form the communicating hole 13 e communicating with the through hole in the coupling portion 13 . That is, the communicating hole 13e is integrally communicated with the through hole, and it is preferably understood that the protrusion portion is formed between the through hole and the communicating hole 13e.

On the other hand, referring to Fig. 3a and Fig. 5b, it is preferable that the inherent identification marks 14a, 14b, 14c are provided as visible reference indicators, and the visible reference indicators are marked on the upper part of the joint part 13, so as to visually identify , and then individually matched with the virtual base station 100k stored in the digital library. At this time, the meaning of individual matching is as follows: the surface information of various types of digital abutments 100, 200, 300 scanned by an oral scanner and converted into three-dimensional digital data are individually matched through the inherent identification marks 14a, 14b, 14c And it is replaced by the corresponding virtual base station 100k.

Here, at least one of the inherent identification marks 14a, 14b, 14c is selectively provided on the upper part of the joint part 13, so as to individually identify the individual identification marks given according to size and shape (ie, multiple types). Digital abutment 100, 200, 300. In addition, preferably, the inherent identification marks 14a, 14b, 14c are given according to the size and shape of the digital base 100, 200, 300, and are formed and arranged on the lower identification surface at the upper part of the joint part 13 to provide a visible Benchmarks.

At this time, the low recognition surface refers to a smooth surface portion of the bonding portion 13 . That is, when scanning the joint portion 13 , there is a possibility that the oral scanner cannot continuously recognize the outer contour of the joint portion 13 due to the smooth surface structure or the performance of the oral scanner. In order to solve this problem, the inherent identification marks 14 a , 14 b , 14 c are preferably formed on the low identification surface of the joint part 13 .

Then, preferably, at least one of the inherent identification marks 14a, 14b, 14c is selectively provided on the low identification surface. At this time, the case where the inherent identification marks 14 a , 14 b , and 14 c are recessed in the shape of a female angle is shown and described below as an example. Certainly, according to circumstances, the inherent identification mark may also be in the shape of a raised portion extending from the low identification surface, as long as it represents a structure for visually identifying the inherent identification mark, the shape is not limited. At this time, it is preferably understood that the inner contour of the matching groove of the above-mentioned artificial dental crown is actually formed correspondingly to the outer contour of the coupling portion 13 including the groove.

In addition, the optional formation of at least one is preferably understood as including the shape without the inherent identification mark, and then provide the function of distinguishing between the individual identification marks respectively given according to the size and shape of each of the digital base stations.

Then, preferably, the inherent identification marks 14a, 14b, 14c are respectively formed into different groove shapes corresponding to the size and shape of the digital bases 100, 200, 300. Here, when there are a plurality of the grooves, the grooves are preferably arranged at a predetermined distance from each other.

Here, preferably, the inherent identification marks 14a, 14b, 14c include a first inherent identification mark 14a, a second inherent identification mark 14b and a third inherent identification mark 14c. In addition, preferably, the inherent identification marks 14 a , 14 b , 14 c corresponding to the size and shape are formed on the digital base stations 100 , 200 , 300 . At this time, preferably, the digital base stations 100, 200, 300 include first to ninth digital base stations 100a, 100b, 100c, 200a, 200b, 200c, 300a, 300b, 300c. At this time, the basic structures other than the unique identification marks 14a, 14b, and 14c are the same in one embodiment of the present invention and its first modification and second modification, and the same reference numerals are used for the same structures.

In detail, referring to FIG. 3 a and FIG. 3 b , at least one first unique identification mark 14 a is selectively formed to correspond to the size and shape of the digital base station 100 , and preferably different numbers are formed from each other. For example, in the case where the first inherent identification mark 14a is formed in one place in the first digital base station 100a, the first inherent identification mark 14a may be formed in two places in the second digital base station 100b, wherein the second digital base station 100b has Different size and shape from the first digital base station 100a.

Here, preferably, the first inherent identification mark 14a in an embodiment of the present invention surrounds the communication hole 13e and is recessed on the upper surface 13d of the joint portion 13 to form a semicircular inner corner.

Then, referring to FIG. 4 a and FIG. 4 b , at least one second inherent identification mark 14 b is selectively formed corresponding to the size and shape of the digital base station 200 , and is preferably formed in a different number from each other.

Here, preferably, the second unique identification mark 14b of the first modification example of an embodiment of the present invention is recessed on the upper surface 13d of the joint portion 13 to form a circular cross section. In addition, the second inherent identification marks 14b may be formed along the outline of the upper surface 13d of the joint portion 13, or may be arranged in series with each other on the upper surface 13d of the joint portion 13 according to circumstances.

Then, referring to FIG. 5 a and FIG. 5 b , at least one third inherent identification mark 14 c is selectively formed corresponding to the size and shape of the digital base station 300 , and preferably a different number is formed among them.

Here, preferably, the third inherent identification mark 14c of the second modified example of an embodiment of the present invention is recessed along the periphery of the side surface portion 13a of the joint portion 13 to form a female angle shape. In detail, the third inherent identification mark 14c may be recessed along the outer surface of the upper side of the side portion 13a of the joint portion 13 including the alignment groove portion 13b and the notch portion 13c. Accordingly, after the edge portion 12 is inserted into the inner side of the soft tissue of the gum, the inherent identification marks 14a, 14b, 14c that are easily recognized by the naked eye on the upper portion of the joint portion 13 correspond to the dimensions of the digital abutments 100, 200, 300. And the shape also forms the shape of the groove. According to this, the prevention of artificial dental crown implantation errors due to the mistakes of the treatment personnel can significantly improve the convenience of the operation.

Furthermore, the inherent identification marks 14 a , 14 b , 14 c form groove shapes on the upper part of the joint part 13 . Accordingly, the contact area filled with curable resin is maximized when matching the inner surface contour of the matching groove of the artificial dental crown corresponding to the outer contour of the joint portion 13 . Accordingly, the bonding force between the bonding portion 13 and the matching groove is improved, so when the artificial crown is placed in the oral cavity, the bonding force with the digital abutment 100, 200, 300 can be improved.

On the other hand, the dental arch of the object implanted in the digital abutment 100, 200, 300 is scanned by the oral scanner. Next, the surface information of the digital abutment 100, 200, 300 and the object dental arch scanned by the oral scanner is transformed into three-dimensional digital data by the scanning image processing of the planning part (s20). Then, a three-dimensional working image 1d is generated, and the three-dimensional working image 1d includes the surface information of the digital base 100, 200, 300 converted into three-dimensional digital data by the planning unit.

Here, the 3D working image 1d is preferably understood to be 3D digital data including the surface information 2d of the dental arch and the implantation information 7d of the fixed body. At this time, the surface information 2d of the object dental arch has the same size and shape corresponding to the real object dental arch of the person to be treated. In addition, the implanted information 7d of the fixed body actually has the same size and shape corresponding to the real fixed body.

Then, preferably, the surface information is that at least three curved parts on the surface of the bonding part 13 are recognized by the oral scanner, processed by the planning part, and converted into three-dimensional digital data. At this time, the curved part of the surface of the joint part 13 is preferably understood as including the inherent identification marks 14a, 14b, 14c, the alignment groove part 13b and the cutout part 13c, and the upper part of the edge part 12. 12a. That is, corners and vertices that are easy to scan and recognize are formed on the surface of the joint part 13 by the inherent identification marks 14a, 14b, 14c, the alignment groove part 13b and the notch part 13c, and the upper part 12a of the edge part 12, The low recognition surface is thereby minimized.

Specifically, the dental arch of the object implanted with the fixed body and the digital abutment 100 , 200 , 300 is scanned by the oral scanner. That is, it is preferable that the oral scanner scans the joint portion 13 exposed on the surface of the gum and the entire dental arch of the subject. Accordingly, the inherent identification marks 14a, 14b, 14c, the alignment groove portion 13b, the notch portion 13c, and the upper portion 12a of the edge portion 12 can be obtained as identification reference portions k1, k2, k3. At this time, it is preferably understood that the surface information on the joint portion 13 of the digital base station 100 , 200 , 300 includes the identification reference portion k1 , k2 , k3 .

In addition, preferably, the recognition reference parts k1, k2, k3 are scanned by the oral scanner, scanned by the processing part of the planning part, image processed, and converted into virtual three-dimensional digital data. Here, the identification reference parts k1, k2, and k3 include a first identification reference part k1, a second identification reference part k2, and a third identification reference part k3. At this time, the first identification reference part k1 refers to virtual three-dimensional digital data corresponding to the inherent identification marks 14a, 14b, 14c of the physical object. Then, the second identification reference part k2 refers to virtual three-dimensional digital data corresponding to the alignment groove part 13b of the real object. In addition, the third identification reference part k3 refers to virtual three-dimensional digital data corresponding to the frame of the upper part 12a of the edge part 12 of the real object. Furthermore, the identification reference portion may include virtual three-dimensional digital data corresponding to the corner of the cutout portion 13c of the real object.

Here, the inherent identification marks 14a, 14b, and 14c for scanning, image processing, and identification are formed on the upper part of the joint part 13, and the inherent identification marks 14a can be identified when scanned by the oral scanner , 14b, 14c. Furthermore, when scanned by the oral scanner, the alignment groove 13b and the notch 13c formed on the side surface 13a of the joint 13, and the corners of the upper surface 12a of the edge 12 can be identified. .

Accordingly, when the combined portion 13 is scanned by the oral scanner, the grooves of the inherent identification marks 14a, 14b, 14c, the surface structure formed by the alignment groove portion 13b and the cutout portion 13c The grooves or corners improve the scanning recognition rate.

Therefore, by forming the inherent identification marks 14a, 14b, 14c in the shape of grooves on the low identification surface of the joint part 13 scanned by the oral scanner, the scanning identification rate is improved. Accordingly, the subtle errors between the physical digital bases 100, 200, 300 and the corresponding transformed 3D digital data are eliminated, and the accurate 3D working image 1d can be obtained.

On the other hand, the virtual base station 100k automatically extracted from the digital library corresponding to the inherent identification marks 14a, 14b, 14c of the digital base stations 100, 200, 300 is automatically and virtually configured on the three-dimensional working drawing by the planning department. Like 1d and replaced (s30). In addition, the planning unit generates artificial crown design information 300d in which a virtual matching groove 301d corresponding to the outer contour of the virtual abutment 100k is set (s30).

Here, the virtual base station 100k has substantially the same size and shape as the digital base station 100 , 200 , 300 . In addition, the virtual base 100k refers to three-dimensional vector data that can realize the appearance and structure of the real digital bases 100 , 200 , and 300 in the same way. Such virtual base stations 100 k are preferably stored in multiples in the digital library, so as to match and resemble the digital base stations 100 , 200 , 300 having various specifications and types corresponding to physical objects. Furthermore, the virtual base station 100k can also be obtained by directly scanning or obtaining CAD/CAM design information on the physical digital base station 100 , 200 , 300 . At this time, the digital library is preferably understood as a database of three-dimensional shape information acquired by digital base stations 100 , 200 , and 300 with various specifications and types of physical objects.

Then, the size and shape of the virtual base station 100k corresponding to the physical digital base station 100, 200, 300 can be automatically extracted from the digital library through the planning unit. Of course, the virtual base station 100k may also be manually extracted by the planning unit. At this time, it is preferable to match the type of the virtual abutment 100k by the oral scanner and the number and shape of the inherent identification marks 14a, 14b, 14c formed in the joint part 13, and the virtual abutment 100k Automatic extraction from the digital library by the planning section.

Next, preferably, the virtual abutment 100k is virtually configured on the surface information of the three-dimensional working image 1d through the planning unit, and the surface information of the three-dimensional working image 1d includes the surface information 2d of the object dental arch And the implantation information 7d of the fixed body. That is, the three-dimensional digital data of the combining part 13 thus converted is replaced by the virtual base 100k extracted from the digital library through the scanning image processing of the planning part.

Here, the three-dimensional digital data converted from the joint part 13 is that the curved part of the surface of the joint part 13 including at least three of the inherent identification marks 14a, 14b, and 14c is identified by the oral scanner and passed through The planning section is scanned for image processing.

Accordingly, at least three curved portions of the surface of the bonding portion 13 including the inherent identification marks 14a, 14b, and 14c for scanning image processing and identification are accurately identified by the oral scanner, thus improving scanning identification. Rate. Therefore, the virtual base 100k automatically extracted corresponding to the inherent identification marks 14a, 14b, 14c is virtually arranged in the three-dimensional working image 1d and replaced. Accordingly, the accurate artificial crown design information 300d can be generated corresponding to the outer contour of the virtual abutment 100k, which can significantly improve the accuracy of the dental restoration.

On the other hand, the surface information 2d of the object dental arch corresponding to the outer contour of the object dental arch side and the surface information of the opposing dental arch corresponding to the outer contour of the opposing dental arch side opposite to the object dental arch It is three-dimensionally visualized and displayed on the three-dimensional working image 1d.

In addition, the three-dimensional working image 1d preferably includes information on the vertical caliber (occlusal vertical dimention) between the subject dental arch and the counter dental arch. Here, the vertical caliber may be acquired through a combined bite membrane (not shown), which is separately configured and inserted inside the oral cavity.

In detail, the combined occlusal membrane (not shown) includes: a face corresponding to the outer surface of the gum part of the object's dental arch; and another face occlusal with the end of the object's dental arch. At this time, for the combined bite membrane (not shown), it is preferable that the space between the modified one face and the modified other face has a thickness corresponding to the vertical diameter of each subject. Here, the vertical caliber for the individual patient is preferably understood to be the distance between the upper and lower jaws that can be occluded in a suitable and comfortable state when the patient occludes the upper and lower jaws. Accordingly, each image data considering the vertical aperture can be acquired in a state where the subject dental arch and the counter dental arch are occluded by the combined occlusal membrane (not shown).

At this time, the vertical diameter corresponding to each treated person is preferably understood as including: the interval between the one face and the other face of the combined bite membrane is manufactured to be the same as the vertical diameter of each treated person Corresponding; the combined bite membrane (not shown) is set between the subject dental arch and the counter dental arch, and the occlusal pressure is modified to correspond to the vertical diameter of each subject.

Then, various image data such as a plurality of scanned images and CT images are acquired by an imaging device such as an oral scanner or a computerized tomography scanner, and transmitted to the planning unit. In detail, the plurality of scanned images may include: a first scanned image of the outer surface of the object's dental arch, a second scanned image of the outer surface of the opposed dental arch, and the combined occlusal membrane ( not shown) image information of the third scanned image. That is, the surface information 2d of the object dental arch is obtained from the first scanned image, and the surface information of the opposed dental arch is obtained from the second scanned image. At this time, the image information of the combined occlusal membrane is preferably understood to include: information obtained by scanning the combined occlusal membrane; Information obtained by the bow.

On the other hand, calculating the matching ratio between the image unit of the set comparison area of each of the first scanned image and the second scanned image and the corresponding area of the third scanned image. At this time, when the matching rate is greater than the set value, the comparison areas of the first scanned image and the second scanned image are aligned and arranged in the corresponding areas of the third scanned image. area. Accordingly, the surface information 2d of the object dental arch and the surface information of the opposed dental arch are included in the three-dimensional working image 1d in a state of being aligned to correspond to the vertical aperture.

Then, preferably, the CT image is obtained by directly photographing the oral cavity with a computed tomography scanner in a state of occlusalizing the combined occlusal membrane to correspond to the vertical aperture. Accordingly, the CT image includes three-dimensional data of the alveolar bone on the dental arch side of the subject except for soft tissues such as the lips, buccal mucosa, and gums with low density of radiation transmission. Furthermore, in the case that the opposing tooth remains on the side of the opposing dental arch, the CT image may include an opposing tooth corresponding to the space between the dental arch side of the object and the vertical caliber through the combined occlusal membrane Tooth 3D data.

Then, the implantation information of the fixed body and the digital abutment can be set corresponding to the outline of the abutment joint part, and the outline of the abutment joint part protrudes to the outside of the gum part of the object's dental arch in the scanned image. Image and representation of the CT image. That is, the first scanned image can three-dimensionally represent the surface information 2d of the target dental arch in a state where the outline of the joint protrudes outward from the gum. Hereinafter, the outline of the joint part shown in the three-dimensional working image 1d is preferably understood to include surface information scanned for the joint part of the abutment implanted in the object's dental arch and the virtual abutment 100k.

In addition, the surface information of the object dental arch representing the outline of the joint portion and the surface information of the opposite dental arch corresponding to the information and the vertical aperture interval are three-dimensionally graphically represented on the three-dimensional working drawing. like 1d. Then, the design information 300d of the artificial dental crown is generated in the three-dimensional working image 1d including the surface information 2d of the object dental arch, the surface information of the opposed dental arch, and the implantation information.

Specifically, the virtual matching groove 301d corresponds to the outer contour of the joint portion of the virtual abutment 100k, and the design information 300d of the artificial crown setting the virtual matching groove 301d is generated by the planning unit. Here, preferably, the inner contour of the virtual matching groove 301d is set by the outer contour that actually corresponds to the outer contour of the joint part of the virtual abutment 100k. At this time, according to the situation, it can also be formed as follows: between the outer surface of the joint part 13 of the manufactured object and the inner surface of the matching groove, it can also be filled and cured with curable resin, corresponding to the set pore pitch interval. Modify porosity.

On the other hand, the artificial crown is finally manufactured corresponding to the design information 300d of the artificial crown (s40). Here, the design information 300d of the artificial dental crown is actually manufactured corresponding to the physical artificial dental crown, and has the same size and shape as each other. In addition, the virtual matching groove 301d actually corresponds to the physical matching groove, and has the same size and shape as each other.

Accordingly, the actual artificial dental crown is manufactured corresponding to the design information 300d of the artificial dental crown, and the matching groove of the artificial dental crown is manufactured with the inner surface contour actually corresponding to the outer contour of the digital abutment joint part 13 of the actual object . According to this, when setting the final manufactured dental restoration, the degree of matching with the digital abutment is obviously improved, so the chewing sensitivity of the treated person can be improved.

Thereby, accurately corresponding virtual abutments are extracted from the digital library using three-dimensional working images in a state where various types of digital abutments are implanted in the oral cavity provided in minute sizes. Accordingly, by visually recognizing the inherent identification mark corresponding to the size and shape of the digital abutment, an accurate artificial dental crown matching the virtual abutment can be designed, thereby preventing interference to the treatment personnel.

As mentioned above, the present invention is not limited to the above-mentioned various embodiments, and within the scope of the claims of the present invention, those with common knowledge in the technical field of the present invention can implement modifications, and the implementation of such modifications belongs to the scope of the present invention. within range. [Industrial applicability]

The present invention is applicable to the manufacturing industry of dental restoration products.

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FIG. 1 is a diagram illustrating an example of a conventional base station. Fig. 2 is a flowchart illustrating a method for manufacturing a dental restoration using a digital abutment according to an embodiment of the present invention. 3a and 3b are perspective views illustrating a digital base station according to an embodiment of the present invention. 4a and 4b are perspective views illustrating a digital base station according to a first modified example of an embodiment of the present invention. 5a and 5b are perspective views illustrating a digital base station according to a second modified example of an embodiment of the present invention. Fig. 6 is an exemplary diagram showing a three-dimensional working image in a method for manufacturing a dental restoration using a digital abutment according to an embodiment of the present invention.

Claims (5)

A method for manufacturing a dental restoration using a digital abutment, comprising: a first step of scanning an object dental arch implanted with a digital abutment through an oral scanner, wherein the upper part of the digital abutment is formed with an inherent Identify the mark; the second step is to transform the surface information of the digital abutment and the object dental arch scanned by the oral scanner into three-dimensional digital data through scanning image processing, and obtain the three-dimensional digital data to generate a three-dimensional working drawing Like, the three-dimensional working image includes the surface information of the digital abutment converted into three-dimensional digital data; the third step is to extract the virtual abutment virtual configuration from the digital library corresponding to the inherent identification of the digital abutment In the three-dimensional working image and replaced, generate the design information of the artificial crown with the virtual matching groove corresponding to the outer contour of the virtual abutment; and the fourth step, corresponding to the The design information finally produces the artificial dental crown, wherein in the third step, the virtual abutment corresponding to the real digital abutment's inherent identification is extracted from the digital library; the extracted virtual abutment corresponds to The virtual object dental arch surface information that is virtually configured on the three-dimensional working image is identified based on the inherent identification. The method for manufacturing a dental restoration using a digital abutment according to item 1 of the scope of the patent application is characterized in that, in the first step, the inherent identification mark is given according to the size and shape of the digital abutment, and the configuration a low identification surface on the upper portion of the joint inserted in a manner matched to a matching groove formed in the lower portion of the above-mentioned artificial dental crown to provide a visible reference index, and optionally provided with at least one groove formed therein; In the second step, the surface information includes at least three curved parts of the surface of the joint part that include the inherent identification mark, which is recognized by the oral scanner and then processed by the scanned image and then converted into three-dimensional digital data. change. A digital abutment for generating design information of an artificial dental crown corresponding to a virtual abutment, wherein the virtual abutment is three-dimensionally digitized and virtually configured in a three-dimensional working image through scanning image processing and extracted from a digital library , is characterized in that it includes: fastening protrusions, six protrusions are formed on the outside to match the six grooves formed on the inner surface of the upper end of the fixed body implanted in the alveolar bone, and a through hole is formed inside to insert intermediary fastening screws fastened with the fixed body; the edge part is arranged integrally on the upper side of the fastening protrusion and is formed by an outer contour corresponding to the shape of the peripheral part of the gum implanted in the fixed body, so as to Arranged toward the inner side of the soft tissue of the gum; the joint part is arranged in one body on the upper side of the edge part, and is configured to actually correspond to the outer contour of the inner surface contour of the matching groove, so as to match the groove installed in the oral cavity of the treated person. The matching groove formed in the lower part of the artificial dental crown, and a communication hole is formed, and the communication hole communicates with the through hole and forms a convex part that clamps the head of the fastening screw; the inherent identification mark, as visible A reference index is provided, marked on the upper part of the joint, so as to be visually identified, and then individually matched with the virtual abutment stored in the digital library. Such as the digital base station of item 3 of the patent scope, it is characterized in that, The inherent identification mark is selectively provided with at least one groove formed on the upper part of the joint part to individually identify the digital base station given according to the size and shape; in the case of having a plurality of the grooves Next, the grooves are arranged at a predetermined distance from each other. The digital base station as claimed in item 3 of the scope of the patent application is characterized in that the inherent identification mark is given according to the size and shape of the digital base station, and is arranged on the low identification surface on the upper part of the joint to provide a visible reference index.

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