Artificial tooth and method for manufacturing the same

Abstract

An artificial tooth according to one embodiment of the present invention includes a prosthesis and an abutment, the abutment including an insertion portion inserted into the prosthesis in a direction and a protruding portion protruding from the prosthesis, wherein the insertion portion is inclined to gradually increase in diameter of an outer peripheral surface in the direction, the protruding portion is inclined to gradually decrease in diameter of an outer peripheral surface in the direction, and in a case where the prosthesis is a workpiece structure, a side end portion of the protruding portion is combined with an artificial tooth processing device.

Description

TECHNICAL FIELD

[0001] The present application relates to an artificial tooth and a manufacturing method thereof, and more particularly, to an artificial tooth including a prosthesis structure formed integrally with an abutment inserted into an implant and a manufacturing method thereof. BACKGROUND

[0002] A dental implant refers to an artificial tooth structure in which a dental prosthesis is fixed to an artificial root by implanting the artificial root into a jawbone at a site where a part or all of a tooth is lost and adhering the artificial root to the jawbone, or a dental treatment method as described above.

[0003] Generally, a dental implant is classified into a fixture that plays a role of an artificial root by being implanted into a jawbone, an abutment that is combined to the fixture to be raised to an upper side of a gum of a patient, and a dental prosthesis that is combined to the abutment.

[0004] The fixture is a fixed body that supports an artificial tooth by being implanted into a jawbone at a site where a tooth such as a root of a natural tooth is lost, and the abutment is also referred to as a bridge abutment, and is used to connect the fixture implanted into the jawbone to the artificial tooth, and the artificial tooth can be fixed to an inside of a mouth by means of the abutment and thereby reproduce the same form and function as a natural tooth.

[0005] In a dental implant treatment, the fixture is first implanted into a jawbone of a gum where an artificial tooth is to be fixed, and then a process in which the jawbone and the fixture are firmly fixed is performed for a certain period of time, and finally the abutment is locked to the fixture. In addition, a process of taking an impression of a shape of an inside of a mouth is performed, and then a process of connecting the abutment to the fixture is performed.

[0006] However, since the conventional artificial tooth manufacturing method requires a process of sequentially connecting a work piece to a processing device to be processed and combining the work piece to the abutment after the work piece is separated from the processing device, there is a problem in that a manufacturing time is lengthened. In addition, after the artificial tooth is processed, a process of combining the abutment is performed through a manual work, and thus accuracy of a position where the abutment is combined to the artificial tooth is low, and when the abutment is combined to an inaccurate position, a work is re-performed, thereby causing a problem in that a treatment time is lengthened. SUMMARY

[0007] TECHNICAL PROBLEM

[0008] The present application aims to solve the conventional problems as described above, and provides an artificial tooth and a manufacturing method thereof in which a process of combining a work piece structure to a separate abutment can be omitted.

[0009] Also, an object is to provide an adapter for a dental prosthesis processing device that can process a dental crown having an accurate tooth shape using an internal structure identical to that of an implant to which a dental base can be coupled, thereby embodying the implantation position of the implant and the like, and a method of manufacturing a dental prosthesis.

[0010] Solution

[0011] A dental prosthesis according to an embodiment of the present application includes a prosthesis and a dental base including an insertion portion inserted into the prosthesis in a direction and a protrusion portion protruding from the prosthesis, wherein the insertion portion is inclined to gradually increase in diameter of an outer peripheral surface in the direction, the protrusion portion is inclined to gradually decrease in diameter of an outer peripheral surface in the direction, and in a case where the prosthesis is a workpiece structure, a side end of the protrusion portion is coupled to a dental prosthesis processing device.

[0012] The prosthesis can include a through-hole passing through an inside of the prosthesis in the direction. In the dental base, a seating hole in which one side of the connecting portion is seated and an insertion hole through which the other side of the connecting portion passes can be formed. When the prosthesis is a tooth-shaped dental crown, the side end of the protrusion portion can be coupled to an implant implanted into an alveolar bone. A buffer portion including zirconia can surround an outer side surface of the insertion portion. The workpiece structure can be a cylindrical shape.

[0013] A method of manufacturing a dental prosthesis according to an embodiment of the present application can include a workpiece structure providing step of providing a workpiece structure equipped with a dental base, a processing device coupling step of coupling one side of the dental base to a dental prosthesis processing device, a dental crown processing step of processing the workpiece structure into a tooth-shaped dental crown using the dental prosthesis processing device, a processing device separation step of separating the dental base from the dental prosthesis processing device, and an implant coupling step of coupling the tooth-shaped dental crown formed integrally with the dental base to an implant implanted into an alveolar bone.

[0014] Effects of the Invention

[0015] The dental prosthesis and the method of manufacturing a dental prosthesis according to the present application can shorten a processing time by omitting a process of coupling a workpiece structure to a separate dental base, and can prevent a problem in which a coupling operation needs to be performed again due to an incorrect coupling position between the dental base and the workpiece structure.

[0016] Also, since the dental base is processed in connection with an adapter having an internal shape identical to that of an implant, a tooth-shaped dental crown set in advance can be accurately processed while simultaneously reflecting an implantation position, a depth, a rotation angle, and the like of the implant. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1is a schematic diagram summarily illustrating an applicable case of the artificial tooth of an embodiment of the present application.

[0018] Figure 2 is a sectional view summarily illustrating a cross section of the artificial tooth of an embodiment of the present application.

[0019] Figure 3 is a sectional view summarily illustrating a cross section of the artificial tooth in combination with a processing device of an embodiment of the present application.

[0020] Figure 4 is a sectional view summarily illustrating a cross section of the artificial tooth in combination with a connecting portion of an embodiment of the present application.

[0021] Figure 5 is a sequence diagram summarily illustrating a manufacturing method of the artificial tooth of an embodiment of the present application.

[0022] Figure 6 is a sectional view summarily illustrating a cross section of the artificial tooth of an embodiment of the present application. DETAILED DESCRIPTION

[0023] Advantages and features of the present application and methods for carrying out the present application will be further clarified by embodiments to be described below with reference to the accompanying drawings.

[0024] However, the present application is not limited to the embodiments disclosed in the following content, but can be realized in various different forms, and the embodiments are only to more completely disclose the present application and more completely introduce the scope of the present application to a person having an ordinary knowledge in the technical field to which the present application pertains, and the present application should be defined only by the scope of the claims.

[0025] Next, reference will be made to Figures 1 to 6 An artificial tooth of an embodiment of the present application and a manufacturing method of the artificial tooth will be described in detail. In describing the present application, specific descriptions related to well-known functions or configurations will be omitted in order to prevent the gist of the present application from becoming unclear.

[0026] Figure 1 is a schematic diagram summarily illustrating an applicable case of the artificial tooth of an embodiment of the present application, Figure 2 is a sectional view summarily illustrating a cross section of the artificial tooth of an embodiment of the present application, Figure 3 is a sectional view summarily illustrating a cross section of the artificial tooth in combination with a processing device of an embodiment of the present application, Figure 4 is a sectional view summarily illustrating a cross section of the artificial tooth in combination with a connecting portion of an embodiment of the present application, Figure 5is a sequence diagram schematically illustrating a manufacturing method of a dental prosthesis according to an embodiment of the present application, Figure 6 is a cross-sectional view schematically illustrating a cross section of a dental prosthesis according to an embodiment of the present application.

[0027] As shown in Figure 1 and Figure 2 , the dental prosthesis 1 according to the present application can include an abutment 10 and a prosthesis 20. The prosthesis 20 can be a workpiece structure 21 before being processed into a tooth shape, or a tooth-shaped crown 22 formed by computer-aided design (CAD) / computer-aided manufacturing (CAM) processing of the workpiece structure 21.

[0028] The abutment 10 can connect the prosthesis 20 to an implant 40 implanted into a dental prosthesis processing device or alveolar bone 60 in a state of being integrated with the prosthesis 20. A thread can be formed on the abutment 10.

[0029] In the case where the prosthesis 20 is the workpiece structure 21, the abutment 10 can be engaged with each other in a state of being integrated with the prosthesis 20 in the processing device. In the case where the prosthesis 20 is the tooth-shaped crown 22, the abutment 10 can be engaged with each other in a state of being integrated with the prosthesis 20 in the thread formed in the implant 40.

[0030] In the related art, a series of processes of individually connecting the workpiece structure to the processing device, separating the processed crown from the processing device, connecting to the implant after being individually combined with the abutment, etc. are required to be sequentially performed.

[0031] In contrast, the dental prosthesis 1 according to the present application can be integrated with the abutment 10 and the prosthesis 20, and thus can be directly thread-coupled with the processing device in the state as described above and processed with the prosthesis 20, and then separated and directly thread-coupled with the implant 40. Accordingly, the dental prosthesis 1 can omit the processes of individually connecting the workpiece structure to the processing device and combining the workpiece structure with the separate abutment in the existing processing process, and thereby shorten the processing time. In addition, since the dental prosthesis 1 according to the present application can be provided in a state in which the abutment 10 is provided on the prosthesis 20, it is possible to prevent the problem of re-performing the combining operation due to inaccuracy of the combined position between the abutment and the workpiece structure in the existing art in advance.

[0032] Next, a detailed description will be given of Figures 2 to 6 the structure of the dental prosthesis 1 and the manufacturing method of the dental prosthesis 1.

[0033] As shown in Figure 2As shown, the prosthesis 20 can adopt a cylindrical shape formed with a through-hole 23 that penetrates the inside along the z-axis direction. In the case where the prosthesis 20 is in a cylindrical shape, the machining allowance of the workpiece structure 21 that can occur when the workpiece is machined into a tooth-shaped crown 22 can be minimized.

[0034] The abutment 10 can be elongated along the z-axis direction and adopt a cylindrical shape. The abutment 10 can include an insertion portion 11 and a protruding portion 12. The insertion portion 11 can be located inside the prosthesis 20. The insertion portion 11 can adopt a shape of a truncated cone, and can be formed so as to be inclined in such a manner that the outer peripheral surface diameter gradually increases toward the lower portion in the z-axis direction. In the insertion portion 11, a seating hole 13 that penetrates the inside of the insertion portion 11 along the z-axis direction can be formed. The seating hole 13 can be located at a position facing the through-hole 23.

[0035] Because the abutment 10 is in a shape in which the outer peripheral surface of the insertion portion 11 gradually increases toward the lower portion, in the case where an external force acts on the insertion portion 11, the external force can be gradually dispersed toward the lower portion of the insertion portion 11, and the stability of the support of the prosthesis 20 by the abutment 10 can be improved. In addition, because the contact area with the prosthesis 20 gradually increases toward the lower portion when the insertion portion 11 is located inside the prosthesis 20, the mechanical strength of the abutment 10 that is integrated with the prosthesis 20 can be enhanced.

[0036] The outer peripheral surface diameter of the lower end portion of the insertion portion 11 can be 1.5 to 2.5 times the outer peripheral surface diameter of the upper end portion. When the outer peripheral surface diameter of the lower end portion of the insertion portion 11 is less than 1.5 times the outer peripheral surface diameter of the upper end portion, because the insertion portion 11 is in a shape in which the inclination is almost zero, it is difficult to disperse the external force toward the lower portion of the insertion portion 11. In addition, when the outer peripheral surface diameter of the lower end portion of the insertion portion 11 exceeds 2.5 times the outer peripheral surface diameter of the upper end portion, a problem in which the unit price of manufacturing increases can occur. Therefore, it is desirable to adjust the outer peripheral surface diameter of the lower end portion of the insertion portion 11 to the range as described above, based on the outer peripheral surface diameter of the upper end portion.

[0037] The protruding portion 12 can be connected to the insertion portion 11 and located outside the prosthesis 20. The protruding portion 12 can adopt a spindle shape, and can be elongated along the z-axis direction while being formed with a rounding toward the inside of the protruding portion 12. The rounding portion 18 can softly contact the surrounding gums in the case where the abutment 10 is inserted into the implant 40 implanted in the alveolar bone 60. In the inside of the protruding portion 12, an insertion hole 14 that penetrates the protruding portion 12 along the z-axis direction can be formed. The insertion hole 14 is connected to the seating hole 13, and the diameter thereof can be smaller than the diameter of the seating hole 13.

[0038] Furthermore, the abutment tooth 10 may be made of titanium, chromium, cobalt, platinum, gold, or alloys thereof, while the prosthesis 20 may be made of crystal glass, polymer, or ceramic. In the case described above, the abutment tooth 10 may include a buffer portion 15 made of zirconia surrounding the outer surface of the insertion portion 11. When the buffer portion 15 is provided with the abutment tooth 10 fitted onto the prosthesis 20, fracture due to differences in the physical properties of the materials used in the prosthesis 20 and the abutment tooth 10 can be prevented beforehand.

[0039] When the prosthesis 20 contains biocompatible materials such as crystal glass or ceramic, the crown margin can be implanted subgingivally, thus minimizing bacterial penetration through excellent initial adhesion between the gingiva and the crown. The abutment tooth 10 may also contain antibacterial substances, thereby preventing adhesion failure due to bacterial infection by inhibiting bacteria in the surrounding tissues.

[0040] That is, the abutment tooth 10 and the prosthesis 20 of the artificial tooth 1 provided by the present invention are integrally formed. Because the outer peripheral diameter of the insertion portion 11, which contacts the outer surface of the abutment tooth 10 and the inner surface of the prosthesis 20, gradually increases in the downward direction, external forces can be dispersed and support stability can be improved. In addition, when the abutment tooth 10 and the prosthesis 20 are integrally formed and integrated into the implant 40, the abutment tooth 10 can be gently placed without damaging the gum and without causing wobbling through the chamfered portion 18.

[0041] like Figure 3 As shown, the artificial tooth 1 can be connected to the artificial tooth processing device 50 in a state where the abutment tooth 10 and the prosthesis 20 are integrally formed. The artificial tooth processing device 50 can be a computer-aided design (CAD) / computer-aided manufacturing (CAM) milling machine. An adapter 51 can be formed in the artificial tooth processing device 50, which can firmly connect the abutment tooth 10 and the artificial tooth processing device 50.

[0042] The adapter 51 and the base tooth 10 can be engaged via the connecting portion 30, and can also be connected via threads formed on the protrusion 12 and threads formed on the adapter 51. The connecting portion 30 can be in the shape of a screw including a head 31 and a body 32. The connecting portion 30 can be inserted into the base tooth 10, wherein the head 31 can be located in the mounting hole 13, and the body 32 can be located in the insertion hole 14.

[0043] The adapter 51 is first connected to the abutment 10 by engaging the threads formed on the inner side of the adapter 51 with the threads formed on the outer side of the protrusion 12, and is secondly connected in a state in which the connecting portion 30 passes through the inside of the abutment 10 by engaging the threads of the connecting portion 30 with the threads of the inner side of the adapter 51. That is, the adapter 51 and the abutment 10 can be firmly combined with each other through two coupling processes.

[0044] The internal structure of the adapter 51 can be the same as that of the implant 40 to which the abutment 10 is combined after the prosthesis 20 is finished, and threads 52 of the same shape as the threads of the implant 40 can be formed in the inside of the adapter 51.

[0045] In the case in which the abutment 10 and the prosthesis 20 are connected to the adapter 51 having the same internal shape as that of the implant 40 in an integrated state and are processed, since the implantation position, the depth, the rotation angle, etc. of the finally locked implant 40 can be simultaneously reflected, the crown 22 of the preset tooth shape can be accurately processed.

[0046] Next, referring to Figures 3 to 5 The manufacturing method of the artificial tooth 1 will be described in more detail.

[0047] As Figures 3 to 5 shown, the manufacturing method of the artificial tooth 1 can include a workpiece structure providing step S10 of providing a workpiece structure 21 equipped with the abutment 10. The workpiece structure providing step S10 can omit a separate process of combining the workpiece block with the abutment 10, and thus can shorten the manufacturing time and thereby improve the efficiency of the manufacturing.

[0048] Next, it can include a processing device combining step S20 of combining one side of the abutment 10 with the artificial press working device 50 in an integrated state of the workpiece structure 21 and the abutment 10. The processing device combining step S20 can further include an adapter providing step of providing an adapter 51 having the same internal shape as that of the implant 40, an adapter combining step of combining one side of the abutment 10 with the artificial tooth processing device 50 through the adapter 51, and an adapter fixing step of fixing the abutment 10 and the adapter 51 by inserting the connecting portion 30 into the abutment 10.

[0049] Furthermore, the procedure may include a crown processing step S30, in which the workpiece structure 21 is processed into a tooth-shaped crown 22 using an artificial tooth processing device 50. The crown processing step can be performed using computer-aided design (CAD) / computer-aided manufacturing (CAM) milling on the workpiece structure 21 according to a pre-defined patient tooth shape, thereby processing the tooth-shaped crown 22. Next, the procedure may include a processing device separation step, in which the abutment tooth 10 is separated from the artificial tooth processing device 50. Furthermore, the procedure may include an implant integration step S40, in which the tooth-shaped crown 22, integrally formed with the abutment tooth 10, is integrated into the implant 40 implanted into the alveolar bone 60.

[0050] According to the method for manufacturing the artificial tooth 1 provided by the present invention, the tooth abutment 10 and the workpiece structure 21 are integrally formed, and the tooth is connected to an artificial tooth processing device via an adapter 51 whose shape is the same as the internal shape of the implant 40 and is combined with a crown 22 of the tooth shape machined on the workpiece structure 21. This allows for accurate machining of the crown 22 of the tooth shape, reflecting the final locked implant position of the implant 40.

[0051] because Figure 6 Besides the insertion part 16 and the protrusion part 17, and Figure 2 The artificial teeth in the figure are similar, so the same figure numbers are used for the same parts, and the detailed descriptions associated with them are omitted.

[0052] like Figure 6 As shown, the artificial tooth 2 may include an abutment tooth 10 consisting of an insertion portion 16 and a protrusion 17. The insertion portion 16 may be located inside the prosthesis 20, while the protrusion 17 may be connected to the insertion portion 16 and located outside the prosthesis 20.

[0053] The insertion portion 16 can be formed at an angle where its outer peripheral surface diameter gradually increases in the z-axis direction, and it can extend in a straight line parallel to the z-axis. That is, the insertion portion 16 can include an inclined portion that gradually increases in the contact area with the prosthesis 20 downwards, and a planar portion that connects to the inclined portion and extends in a straight line. When the insertion portion 16 includes a planar portion that extends in a straight line, a stable clamping force can be formed between the insertion portion 16 and the prosthesis 20, thereby improving the durability of the abutment tooth 10.

[0054] The preferred embodiments of the present invention have been described in detail above, but the scope of the claims of the present invention is not limited thereto. Various modifications and improvements made by those skilled in the art using the basic concepts of the present invention as defined in the appended claims are also included within the scope of the claims of the present invention.

[0055] practicality

[0056] The present invention provides an artificial tooth and a method of manufacturing the same, and more particularly, to an artificial tooth including a prosthesis structure formed integrally with an abutment inserted into an implant and a method of manufacturing the same.

[0057] The artificial tooth and the method of manufacturing the same of the present invention can omit a process of combining a work structure with a separate abutment, and can embody an implantation position of an implant and the like using an adapter of an artificial tooth processing device having an internal structure identical to that of the implant to which the abutment is combined, thereby processing a crown having an accurate tooth shape.

Claims

1. An artificial tooth, characterized in that, include: Prosthesis; as well as The abutment tooth includes an insertion portion that is inserted into the prosthesis in one direction and a protrusion that protrudes from the prosthesis. The insertion portion is formed at an angle where its outer peripheral surface diameter gradually increases in the stated direction, and the protrusion portion is formed at an angle where its outer peripheral surface diameter gradually decreases in the stated direction. In the case where the prosthesis is a workpiece structure, one end of the protrusion is combined with the artificial tooth processing device. The prosthesis comprises at least one of crystalline glass, polymer, and ceramic, and the abutment tooth comprises at least one of titanium, chromium, cobalt, platinum, gold, and their alloys. It further includes a buffer portion surrounding the outer side of the insertion portion and comprising zirconium oxide.

2. The artificial tooth according to claim 1, characterized in that: The prosthesis includes a through hole extending through the interior of the prosthesis along the said direction.

3. The artificial tooth according to claim 2, characterized in that: The abutment tooth has a placement hole for one side of the connector and an insertion hole with a diameter smaller than the placement hole that allows the other side of the connector to pass through.

4. The artificial tooth according to claim 3, characterized in that: When the prosthesis is a tooth-shaped crown, one end of the protrusion is combined with the implant inserted into the alveolar bone.

5. The artificial tooth according to claim 1, characterized in that: The workpiece structure has a cylindrical shape.

6. A method for manufacturing artificial teeth, used to manufacture the artificial teeth as described in claim 1, characterized in that, include: The workpiece structure provides a step of providing a workpiece structure equipped with a base tooth; The processing device is combined in the following steps: one side of the abutment tooth is combined with the artificial tooth processing device; The crown processing step involves using the artificial tooth processing device to process the workpiece structure into a tooth-shaped crown. The processing device separation step involves separating the abutment tooth from the artificial tooth processing device; as well as The implant integration step involves integrating a crown, which is integrally formed with the abutment tooth and is shaped like a tooth, into the implant that has been inserted into the alveolar bone.

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