Dental implant having an abutment and a prosthesis integrally bonded thereto and a method for manufacturing the same

Abstract

The present invention relates to a dental implant having a configuration in which an abutment made of a metal material and a dental prosthesis are integrally bonded, which is configured to increase the bonding strength between the abutment and the dental prosthesis, and a manufacturing method thereof, wherein the prosthesis and the abutment are integrally connected to each other according to a molding method.

Description

[Technical field]

[0001] The present invention relates to a dental implant having a configuration in which an abutment made of a metal material and a dental prosthesis are integrally bonded, which is configured to increase the bond strength between the abutment and the dental prosthesis, and a method for manufacturing the same. [Background technology]

[0002] A dental implant is an artificial tooth structure formed by embedding an artificial tooth root into a site where a tooth has been partially or completely lost, attaching it to the alveolar bone, and fixing a dental prosthesis to the artificial tooth root.

[0003] Generally, a dental implant comprises a fixture that is embedded in the alveolar bone and acts as an artificial tooth root, an abutment that is connected to the fixture and placed on the patient's gums, and a dental prosthesis that is fastened to the abutment.

[0004] The fixture can be said to be a fixed body configured to be embedded in the alveolar bone at the site of a missing tooth, like the root of a natural tooth, and to support an artificial tooth.

[0005] The abutment, also called an abutment, can be configured to connect the fixture, which is embedded in the alveolar bone, to a dental prosthesis.

[0006] Dental prostheses are secured in the oral cavity by abutments and can be configured to replicate the same form and function as natural teeth.

[0007] Meanwhile, dental prostheses and abutments are connected to each other using a fastening method that uses a bonding agent. In other words, dental prostheses and abutments are generally fastened to each other using the CRP (cement retained prosthesis) method, which uses cement to fix them.

[0008] However, the CPR method has the advantage that the procedure is relatively simple and can be applied without any difference in appearance from the surrounding natural teeth, but it has problems in that inflammation can be induced by excess cement and the dental prosthesis can become detached if the cement dissolves.

[0009] Therefore, the applicant has proposed the present invention to solve such problems, and a related prior art document is Korean Patent Registration No. 10-2048180, "Artificial dental implant with improved fixing structure and buffer structure." [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Korean Patent No. 10-2048180 Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention is intended to solve such problems, and its object is to provide a dental implant and a manufacturing method thereof that are configured to facilitate bonding between an abutment and a dental prosthesis and also increase bonding strength. [Means for solving the problem]

[0012] The present invention relates to a dental implant having an abutment and a prosthesis integrally combined, and the prosthesis and the abutment can be integrally connected to each other by a molding method.

[0013] Additionally, the prosthesis may be made of a resin that is poured into a mold in which the abutments are placed and then hardened.

[0014] The molding mold may include a first mold, and the first mold may include a cavity into which the resin is filled, and a vertical shaft disposed in the center of the cavity and inserted into a hole formed in the abutment to support the abutment.

[0015] The forming mold further includes a second mold that blocks the open upper portion of the first mold, and the second mold can block the open upper portion of the cavity formed in the first mold without interfering with the abutment.

[0016] Also, the cavity may have a shape corresponding to the shape of the tooth to be manufactured, or may have a cylindrical or hexahedral shape.

[0017] Also, one longitudinal side portion of the abutment coupled to the vertical shaft may be disposed in the cavity, and the other longitudinal side portion of the abutment may be disposed outside the cavity.

[0018] In addition, an undercut groove may be formed at a boundary between one side and the other side of the abutment in a longitudinal direction, and a resin may be poured into the groove and hardened.

[0019] The abutment may further include a contact surface increase portion provided at one longitudinal side portion thereof, and the contact surface increase portion may be provided in the form of a thread on the entirety or a portion of the one longitudinal side portion of the abutment.

[0020] The composition may further include an inorganic filler that is mixed with the resin and injected into the molding mold, and the inorganic filler may have a content of 50 to 60% by mass and a particle size of 0.1 μm to 10 μm.

[0021] The present invention may also include an injection step of filling a cavity formed in the molding mold with resin, a placement step of placing an abutment in the cavity filled with resin in the injection step, a hardening step of hardening the resin filled in the cavity, and a demolding step of separating the prosthesis formed by hardening the resin in the hardening step and the abutment from the molding mold. Effect of the Invention

[0022] The dental implant having an abutment and a prosthesis integrally bonded to one another and the manufacturing method thereof according to the present invention has a structure in which the prosthesis and the abutment are integrally bonded to one another by a molding method using a molding mold, thereby increasing the bonding strength between the prosthesis and the abutment and thereby improving durability.

[0023] In addition, the dental implant having an abutment and a prosthesis integrally combined and the manufacturing method thereof according to the present invention can connect the abutment during the process of manufacturing the prosthesis, thereby providing convenience in manufacturing and reducing manufacturing costs as it does not require a separate physical fastening process.

[0024] In addition, the dental implant having a form in which the abutment and the prosthesis are integrally combined and the manufacturing method thereof according to the present invention provides a structure that can be immediately embedded in a fixture according to the shape of the cavity of the molding mold for forming the prosthesis, thereby providing convenience in implant surgery.

[0025] In addition, the dental implant having an abutment and a prosthesis integrally bonded and the manufacturing method thereof according to the present invention provide a form in which the prosthesis and the abutment are integrally bonded without using a fastening method using an adhesive (cement) or a physical interference fit method, thereby making it possible to prevent inflammation caused by excess adhesive and to significantly reduce the defect rate arising from the fastening process. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is an exploded cross-sectional view of a molding mold used to bond the prosthesis and abutment together. [Diagram 2] 2 is a cross-sectional view showing a state in which a resin for forming a prosthesis is injected into the molding mold shown in FIG. 1. FIG. [Diagram 3] FIG. 3 is a perspective view showing a state in which the prosthesis and the abutment have been removed from the molding mold shown in FIG. 2. [Figure 4] FIG. 13 is a cross-sectional view showing a state in which a cavity of a forming mold is formed in the form of teeth. [Diagram 5] 1 is a cross-sectional view showing a state in which a contact area increasing portion is formed on the outer surface of an abutment according to the present invention. [Figure 6] 1 is a flow chart illustrating a method for manufacturing a dental implant according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] The advantages, features and methods of achieving the present invention will become more apparent with reference to the following detailed description of the embodiments taken in conjunction with the accompanying drawings.

[0028] However, the present invention is not limited to the embodiments disclosed below, and may be realized in various different forms. However, the embodiments are provided to complete the disclosure of the present invention and to fully inform those skilled in the art of the invention of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0029] A dental implant having an abutment and a prosthesis integrally bonded together according to one embodiment of the present invention and a method for manufacturing the same will be described in detail below with reference to Figures 1 to 6. In describing the present invention, specific descriptions of related publicly known functions or configurations will be omitted in order not to obscure the gist of the invention.

[0030] FIG. 1 is an exploded cross-sectional view of a molding mold used to join a prosthesis and an abutment together; FIG. 2 is a cross-sectional view showing the state in which resin for forming the prosthesis has been injected into the molding mold shown in FIG. 1; FIG. 3 is an oblique view showing the state in which the prosthesis and the abutment have been demolded from the molding mold shown in FIG. 2; FIG. 4 is a cross-sectional view showing the state in which a cavity in the molding mold has been formed in the shape of a tooth; FIG. 5 is a cross-sectional view showing the state in which an increased contact surface portion has been formed on the outer surface of an abutment according to the present invention; and FIG. 6 is a flowchart showing a method for manufacturing a dental implant according to one embodiment of the present invention.

[0031] As shown in FIGS. 1 to 3, a dental implant 100 according to one embodiment of the present invention is characterized in that a prosthesis 110 and an abutment 120 are integrally joined to each other by a molding method using a molding mold 200.

[0032] That is, since the prosthesis 110 is manufactured using a moldable resin, the resin can be poured into a cavity 211 having a shape corresponding to the shape of the prosthesis 110 and then hardened. At this time, the abutment 120 can be placed in the cavity 211 of the molding mold 200. Then, the resin hardens to form the prosthesis 110, and the prosthesis 110 and the abutment 120 can be bonded to each other without a separate fastening process.

[0033] The forming mold 200 can include a first mold 210 and a second mold 220, as shown in FIGS.

[0034] The first mold 210 may include a cavity 211 into which resin is injected and filled to mold the prosthesis 110, and a vertical shaft 212 provided in the center of the cavity 211 and inserted into a hole h formed in the abutment 120 to support the abutment 120.

[0035] The cavity 211 may have a shape corresponding to the shape of the prosthesis 110 to be manufactured. For example, the cavity 211 may have a shape such as a cylinder or a hexahedron, or may have a shape corresponding to the shape of a tooth to be manufactured, as shown in Figs. 4 and 5.

[0036] The vertical shaft 212 may be formed to protrude vertically from the center of the bottom surface of the first mold 210 that defines the cavity 211, and may be inserted into the hole h formed in the abutment 120 as described above. For reference, the hole h may be a hole into which a screw (not shown) for connecting the abutment 120 and a fixture (not shown) to each other is inserted. In other words, when the screw is inserted into the hole h and screwed to the fixture, the abutment 120 and the fixture may be connected to each other.

[0037] The vertical shaft 212 can be inserted into the hole h formed in the abutment 120 in an interference fit manner. Therefore, a user can place the abutment 120 in a fixed state on the tip portion of the vertical shaft 212.

[0038] In this case, one longitudinal side portion of the abutment 120 connected to the vertical shaft 212 may be disposed inside the cavity 211, and the other longitudinal side portion may be disposed outside the cavity 211. It can be said that the longitudinal portion of the abutment 120 disposed inside the cavity 211 is a portion that is integrally connected to the prosthesis, and the longitudinal portion of the abutment 120 disposed outside the cavity 211 is a portion that is connected to the fixture via a screw.

[0039] Alternatively, the resin forming the prosthesis 110 may be injected into the cavity 211 before the abutment 120 is coupled to the vertical shaft 212, or may be injected into the cavity 211 after the abutment 120 is coupled to the vertical shaft 212.

[0040] The second mold 220 may block the open upper portion of the cavity 211 formed in the first mold 210 without interfering with the abutment 120 coupled to the vertical shaft 212. That is, the second mold 220 may be placed on the upper surface of the first mold 210 as shown in Figs. 1 and 2, and may prevent foreign matter from entering the cavity 211 filled with resin.

[0041] The forming mold 200 configured as described above can be made of a material that is less likely to be deformed by an external force and has excellent durability, for example, metal, plastic synthetic resin, graphite, or other relatively soft materials such as silicon or rubber.

[0042] On the other hand, the resin that fills the cavity 211 to form the prosthesis 110 may be made of a flowable methacrylate or acrylate compound.

[0043] The resin injected into the cavity 211 can be cured by various known curing methods. For example, a natural curing method may be used, or a heat curing method or a light curing method using light may be used to shorten the curing time.

[0044] When the resin hardens in the cavity 211 to form the prosthesis 110, one side portion of the prosthesis 110 and the abutment 120 in the longitudinal direction are bonded to each other. Then, the second mold 220 is separated from the first mold 210, and the other side portion of the abutment 120 in the longitudinal direction is pulled, whereby the prosthesis 110 and the abutment 120 can be demolded from the cavity 211.

[0045] Then, as shown in Fig. 3, a hollow prosthesis 110 and an abutment 120 can be manufactured. For reference, in one embodiment of the present invention, the prosthesis 110 is shown in the drawings as having a cylindrical shape, but is not limited thereto. For example, the prosthesis 110 may have a hexahedron or the shape of a tooth to be manufactured.

[0046] In this way, since the resin forming the prosthesis 110 hardens within the cavity 211 while in contact with the abutment 120, the prosthesis 110 and the abutment 120 can naturally bond during the process of manufacturing the prosthesis 110, eliminating the need for a separate fastening process.

[0047] Meanwhile, as shown in FIG. 4, an undercut groove 121 may be provided at the boundary between one side portion and the other side portion of the abutment 120 in the longitudinal direction.

[0048] The groove portion 121 may be formed around the entire circumference of the abutment 120 or may be formed only around a portion of the circumference, and provides a predetermined space through which the resin filled in the cavity 211 can permeate.

[0049] In this manner, the groove 121 can be defined by an inclined surface having an inclination angle of 5 degrees to 30 degrees. Therefore, the bonding strength between the prosthesis 110 and the abutment 120 can be further increased by the resin that has permeated into the groove 121, and in particular, the phenomenon in which the abutment 120 and the prosthesis 110 are separated in the longitudinal direction can be further prevented.

[0050] Also, the abutment 120 may further include a contact surface increasing portion 122. The contact surface increasing portion 122 may be provided at one longitudinal side portion of the abutment 120 disposed inside the cavity 211, as shown in Fig. 5. In this case, the contact surface increasing portion 122 may be provided at the entirety or part of the one side portion of the abutment 120 in the form of a thread.

[0051] The contact surface increasing portion 122 configured as described above can be said to be a component that further increases the bonding strength between the prosthesis 110 and the abutment 120 by providing a large number of spaces into which the resin filled in the cavity can be poured. In other words, it can be said to be another component that increases the bonding area between the prosthesis 110 and the abutment 120, thereby increasing the bonding strength between the prosthesis 110 and the abutment 120.

[0052] Meanwhile, the resin injected into the cavity 211 is preferably mixed with an inorganic filler.

[0053] The content of the inorganic filler is preferably 50 to 60% by mass. If the content of the inorganic filler is 50% by mass or less, the surface smoothness and abrasion resistance of the prosthesis 110 will be insufficient. Conversely, if the content of the inorganic filler is more than 60% by mass, the mechanical strength of the prosthesis 110 may decrease. Therefore, the content of the inorganic filler is preferably 0 to 60% by mass.

[0054] Moreover, the inorganic filler preferably has a particle size of 0.1 μm to 10 μm. When the average particle size of the inorganic filler is small, the surface of the prosthesis 110 becomes smooth. The surface roughness is reduced, and contamination by unevenness and plugs is reduced, so that an excellent effect in aesthetics can be expected. On the other hand, the larger the average particle size of the inorganic filler is, the better the mechanical properties of the prosthesis 110 are, but the rougher the surface becomes, and the greater the surface roughness becomes, resulting in a decrease in the aesthetic effect.

[0055] A method for manufacturing the dental implant 100 configured as described above will now be described with reference to an example.

[0056] The manufacturing method of the dental implant may include an injection step (S100), a positioning step (S200), a curing step (S300) and a demolding step (S400), as shown in FIG.

[0057] First, the injection step (S100) can be said to be a step of injecting a resin into the cavity 211 formed in the first mold 210. At this time, the resin may contain 50 to 60 mass % of an inorganic filler.

[0058] The placing step (S200) can be regarded as a step of coupling the abutment 120 to the vertical shaft 212 provided at the center of the cavity 211. That is, it can be regarded as a step of inserting the vertical shaft 212 into a hole h formed in the abutment 120. That is, it can be regarded as a step of coupling the vertical shaft 212 and the abutment 120 to each other such that one side portion of the abutment 120 in the longitudinal direction is placed inside the cavity 211 and the other side portion in the longitudinal direction is placed outside the cavity 211, as shown in FIG.

[0059] For reference, the positioning step (S200) may be performed before the resin is filled into the cavity 211, or may be performed after the resin is filled into the cavity 211. That is, the positioning step (S200) may be performed after the injection step (S100) is completed, or may be preferentially performed before the injection step (S100) is performed.

[0060] The curing step (S300) can be said to be a step of curing the resin filled in the cavity 211 while blocking the open upper portion of the cavity 211. That is, in the curing step (S300), the second mold 220 can be disposed on the upper surface of the first mold 210 to block the open upper portion of the cavity 211. Then, the resin filled in the cavity 211 can be cured using a known curing method.

[0061] The demolding step (S400) is a step of pulling out the resin after the hardening process and the abutment 120 bonded to the resin from the cavity 211 of the first mold 210. The resin that has hardened after the hardening process is called the prosthesis 110. In order to separate the prosthesis 110 from the cavity 211, the other side portion of the longitudinal direction of the abutment 120 arranged outside the cavity 211 can be grasped with a separate grasping tool and pulled to remove the prosthesis 110 from the first mold 210.

[0062] Upon completion of the above steps, the prosthesis 110 and abutment 120, which are bonded together, may be manufactured.

[0063] Although specific embodiments of the present invention have been described above, it goes without saying that various modifications can be made without departing from the scope of the present invention.

[0064] Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the following claims as well as equivalents thereto. [Industrial Applicability]

[0065] The present invention can be applied and sold in the medical industry field. [Explanation of symbols]

[0066] 100 Dental Implants 110 Prosthetics 120 Abutment 121 Groove 122 Increased contact area 200 Forming Mold Type 210 211 Cavity 212 Vertical axis Type 220

Claims

1. A dental implant having an abutment and a prosthesis integrally bonded thereto, The prosthesis and the abutment are integrally connected to each other by a molding method; The prosthesis comprises: It is made of resin that hardens after being poured into a mold. The forming mold includes a first die, The first mold is a cavity to be filled with the resin; a vertical shaft provided in a center portion of the cavity and inserted into a hole formed in the abutment to support the abutment; One side portion of the abutment in the longitudinal direction connected to the vertical axis is disposed in the cavity, and the other side portion of the abutment in the longitudinal direction is disposed outside the cavity; An undercut groove is formed at a boundary between one side portion and the other side portion of the abutment in a longitudinal direction, Resin is poured into the groove and hardened. A dental implant having a configuration in which an abutment and a prosthesis are integrally bonded.

2. The forming mold is a second mold for blocking the open top of the first mold, The dental implant according to claim 1, characterized in that the second mold blocks the open upper portion of the cavity formed in the first mold without interfering with the abutment.

3. The cavity is A dental implant having a form in which the abutment and prosthesis described in claim 1 are integrally combined, characterized in that it has a form corresponding to the form of a tooth to be produced, or has a cylindrical or hexahedral form.

4. The abutment may further include a contact surface increasing portion provided at one side portion in a longitudinal direction thereof, The dental implant according to claim 1 , wherein the contact surface increasing portion is provided in the form of a thread on the entire or partial portion of one side portion of the abutment.

5. The mold further includes an inorganic filler that is mixed with the resin and injected into the mold, 2. The dental implant according to claim 1, wherein the inorganic filler has a content of 50 to 60 mass % and a particle size of 0.1 μm to 10 μm.

6. A method for producing a dental implant according to claim 1, comprising the steps of: An injection step of filling a cavity formed in the molding mold with a resin; a placement step of placing an abutment in the cavity filled with the resin in the injection step; a curing step of curing the resin filled in the cavity; and a demolding step of separating the prosthesis formed by hardening the resin in the hardening step and the abutment from the molding mold.

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