Method for manufacturing prosthesis for dental implant using digital library

Abstract

The present invention relates to a method for manufacturing a prosthesis for a dental implant by using a digital library including ready-made abutment three-dimensional contour information regarding ready-made abutments having various specifications. According to an embodiment of the present invention, when designing a digital library including three-dimensional contour information of a ready-made abutment including a post having a cutting surface and / or a cutting groove formed on the outer peripheral surface thereof, the digital library including three-dimensional contour information of a ready-made abutment is designed by ignoring the cutting surface and / or the cutting groove such that, even if errors occur in the process of manufacturing the prosthesis in the dental laboratory, the occurrence of early contact on the periphery of the cutting surface and / or the cutting groove between the prosthesis and the post of the ready-made abutment can be prevented.

Description

Method for manufacturing prosthetics for dental implants using a digital library

[0001] The present invention relates to a method for manufacturing a prosthesis for a dental implant, and more particularly, to a method for manufacturing a prosthesis for a dental implant using a digital library containing three-dimensional external shape information of a ready-made abutment having various specifications.

[0002] A dental implant system typically includes a fixture that is implanted into the alveolar bone, an abutment that is fixed to the fixture and supports the pressure corresponding to the occlusal force applied during chewing, and a prosthesis (crown / bridge) that restores the aesthetic beauty similar to that of natural teeth by restoring the upper part of the abutment, i.e., the post.

[0003] Figures 1 and 2 are drawings showing a typical dental abutment, where Figure 1 shows a structure in which a cutting surface is formed in a post, and Figure 2 shows a structure in which a cutting groove is formed in a post.

[0004] As shown in FIGS. 1 and 2, the abutment (10, 20) includes a post (11, 21) that is coupled (fitted) to the inside of a prosthesis (not shown). One or more cutting surfaces (11a) or cutting grooves (21a) are formed in the longitudinal direction (vertical direction) of the abutment (10, 20) on the post (11, 21). These cutting surfaces (11a) or cutting grooves (21a) serve to prevent the prosthesis from rotating about the post (11, 21) when the post (11, 21) is coupled to the prosthesis.

[0005] There are two methods for manufacturing prosthetics: analog, which involves taking an impression of the oral cavity using impression material, shaping it with wax, casting it, and then adding porcelain. Digital, which involves scanning an oral cavity or a pre-made tooth shape to create the prosthesis, is considered a one-off method. Alternatively, there is a method that utilizes a dental digital library. This method offers superior precision compared to both analog and digital methods.

[0006] However, when manufacturing prosthetics using a dental digital library, if the digital library design is done with the incisal plane or incisal groove formed on the abutment post reflected in the digital library, various problems can arise. This can be particularly problematic when manufacturing bridges. For example, when manufacturing a bridge, if the central axes of the abutment post are formed parallel, there is no problem. However, if they are not parallel, the incisal plane or incisal groove formed on the post will also not be parallel and will be misaligned.

[0007] [Prior Art Literature]

[0008] [Patent Document]

[0009] (Patent Document 1) KR 10-1632378 B1, June 15, 2016.

[0010] (Patent Document 2) KR 10-1726706 B1, April 7, 2017.

[0011] (Patent Document 3) KR 10-1632373 B1, June 15, 2016.

[0012] (Patent Document 4) KR 10-2385390 B1, April 6, 2022.

[0013] The post of the abutment is usually made of a tapered structure with a diameter that decreases toward the top (see Fig. 1). In this case, the cutting surface or cutting groove formed on the post has a less tapered degree than the post. For example, in some cases, it is formed almost parallel to the central axis of the post (the central axis that divides the post into left and right). Therefore, if an error occurs during the manufacturing process of the prosthesis, the prosthesis may not adhere evenly and tightly to the outer surface of the post, and premature contact may occur in the form of point contact or line contact at a specific area. In other words, an error during the manufacturing process causes premature contact areas such as point contact or line contact to occur between the prosthesis and the abutment.

[0014] Thus, when bonding and fixing a prosthesis to an abutment, the early contact area mostly occurs around the incisal surface or incisal groove of the post. In this case, if the degree of misalignment of the post's central axis is minimal, this can be resolved to some extent by deleting (removing) a portion of the inner surface of the prosthesis' receiving portion where the post is to be fitted during the manufacturing process. However, if the degree of misalignment of the post's central axis is significant, a significant portion must be removed to correct this, which may compromise the fit of the prosthesis. The prosthesis manufactured in this way will not be accurately bonded to the abutment. In particular, in implant systems that bond and fix the prosthesis to the abutment using a separate threaded fixing member (fixing screw) without using an adhesive, the inability to remove the abutment can cause the problem of making the bridge practically impossible.

[0015] Therefore, the present invention can be proposed to solve the problem of early contact between the prosthesis and the abutment that occurs in a conventional method of manufacturing a prosthesis using a digital library.

[0016] The present invention provides a problem (purpose) to be solved by designing a digital library including three-dimensional external shape information of an abutment for manufacturing a prosthesis, wherein the digital library is designed so that a cutting plane or cutting groove formed on the outer periphery (outer surface) of the post is not reflected, so that the degree of tapering of the outer periphery of the post of the abutment matches the overall external shape, and a method for manufacturing a prosthesis for a dental implant is provided using the digital library designed in this way.

[0017] In addition, as another problem to be solved by the present invention, in an implant system in which a buffering member (elastic member) is inserted between a prosthesis and an abutment for the purpose of buffering occlusal force applied to the prosthesis, a digital library is designed so that a receiving portion of the prosthesis in which a post is received is manufactured to have a structure having a receiving space larger than the overall outer shape of the post, taking into account the thickness or volume of the buffering member, thereby providing a method for manufacturing a prosthesis for a dental implant using a digital library in which a buffering member is stably inserted between the prosthesis and the abutment.

[0018] Furthermore, the present invention is not limited to the aforementioned problems, and various solutions may be additionally provided through the techniques described in the embodiments and claims described below.

[0019] In order to achieve the above object, the present invention according to an embodiment includes a process for designing a digital library including three-dimensional external shape information of a ready-made abutment including a post having at least one of a cutting plane or a cutting groove formed on an outer periphery; and a process for manufacturing a prosthesis using the designed digital library, wherein in the process for designing the digital library, when designing the three-dimensional external shape information of the ready-made abutment, the distance between the intersection point where the axis of the post intersects the perpendicular of the axis of the post and the outer periphery of the post is designed to be the same on the same plane as the intersection point along the circumference of the post, the digital library is provided.

[0020] In addition, the present invention according to another embodiment for achieving the above-mentioned object includes a process for designing a digital library including three-dimensional external shape information of a ready-made abutment including a post having at least one of a cutting surface or a cutting groove formed on an outer periphery; and a process for manufacturing a prosthesis using the designed digital library, wherein in the process of designing the digital library, when designing the three-dimensional external shape information of the ready-made abutment, the three-dimensional external shape of the post is designed by taking into consideration the thickness or volume of a member interposed between the prosthesis and the ready-made abutment, and a method for manufacturing a prosthesis for a dental implant using the digital library is provided.

[0021] In addition, the present invention according to another embodiment for achieving the above-mentioned purpose includes a process for designing a digital library including three-dimensional external shape information of a ready-made abutment; and a process for manufacturing a prosthesis using the designed digital library, wherein in the process for designing the digital library, when designing the three-dimensional external shape information of the ready-made abutment, the method for manufacturing a prosthesis for a dental implant using a digital library is provided for designing the three-dimensional external shape of the post by taking into consideration the thickness or volume of a member interposed between the prosthesis and the ready-made abutment.

[0022] In addition, in the process of designing the digital library, when designing the three-dimensional external shape information of the existing abutment, the three-dimensional external shape of the post can be designed in a truncated cone shape.

[0023] In addition, in the process of designing the above digital library, when designing the three-dimensional external shape information of the above-mentioned ready-made abutment, it can be designed using dental CAD / CAM (Computer Aided Design / Computer Aided Manufacturing).

[0024] In addition, in the process of designing the digital library, when designing the three-dimensional external shape information of the ready-made abutment so that the distance between the intersection and the outer periphery of the post along the circumference of the post on the same plane is the same, the three-dimensional external shape information of the ready-made abutment can be designed so that the distance between the outer periphery of the post on which the cutting plane or cutting groove is formed at the intersection is identical to the distance between the outer periphery of the post on which the cutting plane or cutting groove is not formed at the intersection.

[0025] Additionally, the above post may have a tapered structure in which the diameter becomes smaller as it goes upward.

[0026] Additionally, the above-mentioned ready-made abutment may be formed of a screw-integrated or screw-separated structure.

[0027] Additionally, the prosthesis may be a single crown or a bridge crown.

[0028] As described above, according to the method for manufacturing a prosthesis for a dental implant using a digital library according to an embodiment of the present invention, when designing a digital library including three-dimensional external shape information of a ready-made abutment including a post having a cutting plane and / or a cutting groove formed on an outer periphery, the cutting plane and / or the cutting groove are ignored and the digital library including three-dimensional external shape information of the abutment is designed, so that even if an error occurs in the process of manufacturing the prosthesis in a dental laboratory, premature contact between the prosthesis and the post of the abutment can be prevented from occurring around the cutting plane and / or the cutting groove.

[0029] In addition, according to a method for manufacturing a prosthesis for a dental implant using a digital library according to an embodiment of the present invention, in an implant system in which a buffering member (elastic member) is inserted between a prosthesis and an abutment for the purpose of buffering occlusal force applied to the prosthesis, a method for manufacturing a prosthesis for a dental implant using a digital library is provided, in which the digital library is designed so that the receiving portion of the prosthesis has a structure having a receiving space larger than the outer shape of the post in consideration of the thickness or volume of the buffering member, so that the buffering member can be stably inserted between the prosthesis and the abutment.

[0030] Figure 1 is a drawing showing a structure in which a cross-section is formed on the post of a ready-made abutment.

[0031] Figure 2 is a drawing showing a structure in which a cutting groove is formed in the post of a ready-made abutment.

[0032] Figure 3 is a flow chart showing a method for manufacturing a prosthesis for a dental implant according to an embodiment of the present invention.

[0033] Figure 4 is a drawing showing an example of a ready-made abutment.

[0034] Fig. 5 is a drawing showing a cross-section in the 'AA' direction shown in Fig. 4.

[0035] Fig. 6 is a drawing showing the abutment shown in Fig. 4 as viewed from above.

[0036] Figure 7 is a drawing showing a cross-section of a prosthesis according to an example of the present invention.

[0037] FIG. 8 is a drawing showing an implant system including a prosthesis manufactured through an embodiment of the present invention.

[0038] FIG. 9 is a drawing illustrating a digital library design method according to another example of the present invention.

[0039] Fig. 10 is a cross-sectional view of an implant system including a prosthesis manufactured by the method of Fig. 9, taken in the 'BB' direction.

[0040] Hereinafter, the advantages and features of the present invention and the methods for achieving them will be clarified with reference to the embodiments described in detail below together with the accompanying drawings. In addition, the same reference numerals refer to the same components throughout this specification. In addition, each component illustrated in each drawing may be excessively illustrated in size and shape, but this is for the convenience of explanation and is not intended to be limiting. In addition, when it is described as 'A and / or B', it can mean both A and B, or either A or B.

[0041] A dental digital library may be a database containing three-dimensional external shape information of a ready-made abutment obtained through actual ready-made abutments manufactured in various specifications. Here, the ready-made abutment is an actual abutment manufactured by each manufacturer, and the three-dimensional external shape information of the ready-made abutment refers to three-dimensional vector data that can identically reproduce the external shape and structure of the actually manufactured ready-made abutment. In other words, the digital library provides three-dimensional external shape information of the ready-made abutment that serves as a reference when designing a prosthesis. In an embodiment of the present invention, instead of directly scanning an actually manufactured ready-made abutment, a design method using dental CAD / CAM (Computer Aided Design / Computer Aided Manufacturing) is used to obtain the three-dimensional external shape information. In addition, the three-dimensional external shape information of the ready-made abutment may be assigned an independent product number according to the specification and stored in the digital library. For example, multiple abutments of the same specification may be assigned the same product number, and multiple abutments of different specifications may be assigned different product numbers.

[0042] Figure 3 is a flowchart showing a method for manufacturing a prosthesis for a dental implant according to an embodiment of the present invention.

[0043] Referring to FIG. 3, a method for manufacturing a prosthesis for a dental implant according to an embodiment of the present invention includes a process (S1) of designing a digital library including three-dimensional external shape information of a ready-made abutment to which a prosthesis to be manufactured is to be bonded and fixed, and a process (S2) of manufacturing a prosthesis using the three-dimensional external shape information of the ready-made abutment included in the designed digital library.

[0044] A digital library containing the 3D external shape information of a pre-fabricated abutment can be designed by a manufacturer using CAD / CAM. This designed digital library is then provided to a dental laboratory, which then manufactures prosthetics based on the 3D external shape information of the abutment contained in the pre-fabricated digital library.

[0045] When designing a digital library using CAD / CAM, the 3D appearance of the ready-made abutment is designed by excluding the shape of the incisal plane and / or incisal groove formed on the post of the ready-made abutment so that the information about the incisal plane and / or incisal groove formed on the post of the ready-made abutment is not reflected in the 3D appearance information of the ready-made abutment. In other words, even if the incisal plane and / or incisal groove are formed on the post of the actual ready-made abutment, when designing the 3D appearance of the actual ready-made abutment, the incisal plane and / or incisal groove are ignored and the entire shape of the post is designed to obtain the 3D appearance information of the ready-made abutment.

[0046] Fig. 4 is a schematic drawing to explain an example of a ready-made abutment, and Fig. 5 is a schematic drawing to illustrate a cross-section in the 'AA' direction shown in Fig. 4.

[0047] A digital library containing three-dimensional external shape information of a ready-made abutment (30) such as that shown in FIGS. 4 and 5 can be designed. For example, the ready-made abutment (30) may be a screw-integrated abutment in which the screw is integrally formed with the joint (31). In addition, the ready-made abutment (30) is not limited to a screw-integrated abutment, and may be a screw-separated abutment in which the screw is independently separated from the abutment.

[0048] The ready-made abutment (30) may have slight differences in structure and shape depending on the manufacturer and the condition of the patient's oral cavity and / or the treatment site, but can be broadly divided into three parts. The ready-made abutment (30) includes a connecting portion (31) that is connected to a fixture (not shown) implanted in the alveolar bone, a cuff (32) that is formed on the upper portion of the connecting portion (31) and whose diameter increases as it goes upward, and a post (33) that is formed on the upper portion of the cuff (32) and supports a prosthesis (not shown).

[0049] In the ready-made abutment (30), as shown in Fig. 5, the screw (31a) is formed integrally with the joint portion (31). The cuff (32) can be covered by the gums, in whole or in part, when the joint portion (31) is fixedly fixed to the fixture implanted in the alveolar bone, and a blunt protrusion (32a) is provided on the upper surface of the cuff (32) (the boundary surface with the post (33)). The lower part of the prosthesis (40, see Fig. 8) is fixedly supported on the blunt protrusion (32a) when the prosthesis (40) is fixedly fixed to restore the post (33). The post (33) may have a tapered structure in which the diameter becomes smaller toward the top so as to facilitate the fixation of the prosthesis. For example, the post (33) may have an overall truncated cone shape, and a hollow (33b) may be formed in the center to which a fixing member (50, see Fig. 8) is fixed.

[0050] In the digital library design method according to an embodiment of the present invention, when designing three-dimensional external shape information for a ready-made abutment (30) as shown in FIGS. 4 and 5, the joint portion (31) and the cuff (32) portion are designed to have almost the same external shape (dimensions) as the joint portion and cuff portion of the actual ready-made abutment (30), and only the post portion (33) is designed using the proposed method. Therefore, in this specification, the three-dimensional external shape design for the post (33) will be mainly described.

[0051] A cutting surface (33a) and / or a cutting groove (see Fig. 2) are formed on the outer surface of the post (33) to prevent the prosthesis from being twisted by being rotated about the post (33) when the prosthesis is combined to repair the post (33). The number of cutting surfaces (33a) and / or cutting grooves formed on the post (33) may be one or more. In addition, the cutting surface (33a) and the cutting groove may be formed in the vertical direction (Y-axis direction) of the post (33) or in the left-right direction (X-axis direction) of the post (33). The cutting surface and the cutting groove may be formed together on the post (33).

[0052] Figure 6 is a schematic drawing showing the state of the ready-made abutment shown in Figure 4 as viewed from above.

[0053] When designing a digital library for a ready-made abutment (30) shown in FIGS. 4 to 6 using CAD / CAM, the cutting surface (33a) and / or cutting groove formed on the outer surface of the post (33) is excluded, i.e., the three-dimensional outer shape is designed so that the cutting surface (33a) and / or cutting groove is not reflected.

[0054] For example, when designing three-dimensional external shape information for a ready-made abutment (30) having a structure as shown in FIG. 4, the connecting portion (31) and the cuff (32) are designed to have the same external shape as the connecting portion (31) and the cuff (32) of the ready-made abutment (30), and the post (33) is designed to have a three-dimensional external shape in a truncated cone shape, ignoring the cutting surface (33a) and / or cutting groove formed on the outer surface of the post (33).

[0055] As shown in FIGS. 5 and 6, if the axis (a), which is the central axis of the post (33), and the lines (p1, p2, p3) that meet vertically on an arbitrary plane (P1, P2, P3) are each referred to as perpendiculars of the axis (a), and if the points where the axis (a) and the perpendiculars (p1, p2, p3) meet on an arbitrary plane (P1, P2, P3) are referred to as intersection points (h1, h2, h3), then when designing the three-dimensional outer shape of the post (33), the three-dimensional outer shape of the post (33) is designed so that the distance between each intersection point (h1, h2, h3) and the outer periphery (surface) of the post (33) has the same length on the same plane (P1, P2, P3) along the circumference of the post (33). Through this, even if a cutting surface (33a) and / or a cutting groove is formed on the post (33) of the ready-made abutment (30), this can be ignored when designing the digital library.

[0056] For example, when designing the three-dimensional outer shape of the post (33) of the existing abutment (30), as shown in FIGS. 5 and 6, the distances 'd1' and 'd2' between the intersection 'h1' and the outer periphery of the post (33) on the plane 'P1' are the same along the circumference of the post (33), the distances 'd11' and 'd12' between the intersection 'h2' and the outer periphery of the post (33) on the plane 'P2' are the same along the circumference, and the distances 'd21' and 'd22' between the intersection 'h3' and the outer periphery of the post (33) on the plane 'P3' are the same along the circumference. In other words, the distances between each intersection and the outer periphery of the post (33) along the circumference of the post (33) can be formed to be the same, centered on each intersection where the axis and each perpendicular intersect on the same plane.

[0057] When the distance between the corresponding intersection point and the outer periphery of the post (33) on the same plane is designed to be the same along the circumference of the post (33), the distance between the outer periphery of the post (33) in the area where the cut surface (33a) and / or the cut groove are formed and the corresponding intersection point is designed to match the distance between the outer periphery of the post (33) in the area where the cut surface (33a) and / or the cut groove are not formed and the corresponding intersection point. For example, when designing the three-dimensional outer shape of the post (33), the distance 'd21' between the intersection 'h3' on the plane 'P3' and the outer periphery of the post (33) where the cut surface (33a) is formed (left side in FIG. 6) is designed to match the distance 'd22' between the intersection 'h3' and the outer periphery of the post (33) where the cut surface (33a) is not formed (right side in FIG. 6), thereby designing the three-dimensional outer shape of the post (33).

[0058] In this way, in the embodiment of the present invention, when designing a digital library, the three-dimensional external shape of the post (33) is designed by making the distance between the outer periphery of the post (33) in the area where the cutting plane (33a) and / or the cutting groove are formed and the intersection point on the same plane the distance between the outer periphery of the post (33) in the area where the cutting plane (33a) and / or the cutting groove are not formed and the intersection point. At this time, the distance between the outer periphery of the post (33) in the area where the cutting plane (33a) and / or the cutting groove are not formed and the intersection point the same as the radius of the post (33) on the corresponding plane. Through this, even if the cutting plane (33a) and / or the cutting groove are formed on the post (33) of the ready-made abutment (30), it is possible to design a digital library that includes three-dimensional external shape information of an ready-made abutment that does not reflect the cutting plane (33a) and / or the cutting groove. That is, it is possible to design the three-dimensional external shape information of a post having an overall cone-shaped shape.

[0059] Figure 7 is a schematic drawing showing a cross-section of a prosthesis according to an example of the present invention.

[0060] Using the digital library designed above, a prosthesis (40) having a structure as shown in Fig. 7 is designed. The three-dimensional external shape information of the abutment (30) included in the digital library, particularly the external shape information of the post (33), determines the internal shape of the receiving portion (41) of the prosthesis (40).

[0061] The receiving portion (41) of the prosthesis (40) is a portion where the post (33) of the ready-made abutment (30) is inserted and closely fitted, and is manufactured based on the digital library designed by the aforementioned method, so that its internal shape corresponds to the three-dimensional external shape of the abutment as determined. Accordingly, when the manufactured prosthesis (40) is fixedly joined to the post (33) of the ready-made abutment (30), the outer periphery of the post (33) can be uniformly joined to the inner surface of the receiving portion (41) of the prosthesis (40).

[0062] Currently, most prefabricated abutments have incisal planes and / or incisal grooves formed on the post. Accordingly, when designing a digital library using scanning or CAD / CAM, the 3D outline of the abutment is designed to reflect the incisal planes and / or incisal grooves of the post. When manufacturing a prosthesis using a digital library designed with incisal planes and / or incisal grooves, premature contact between the manufactured prosthesis and the post can occur. This can be exacerbated by errors in the manufacturing process.

[0063] Accordingly, in a method for manufacturing a prosthesis according to an embodiment of the present invention, when designing a digital library for manufacturing a prosthesis to be coupled to a prefabricated abutment having a cutting plane and / or cutting groove formed on the post, the three-dimensional outer shape of the post is designed as a truncated cone shape based on the outer periphery that reflects the overall outer shape of the post, ignoring the cutting plane and / or cutting groove. Accordingly, even if an error occurs during the process of manufacturing the prosthesis in a dental laboratory, premature contact between the manufactured prosthesis and the post can be fundamentally prevented.

[0064] The ready-made abutment (30) may be formed with a tapered structure in which the diameter of the post (33) becomes smaller as it goes upward, as shown in FIGS. 4 and 5, or may be formed with a structure having the same diameter. In addition, the ready-made abutment may be fixed to a fixture implanted in the alveolar bone through a screw-integrated type (a structure in which the screw is formed integrally with the joint) or a screw-separated type (a structure in which the screw is inserted into a hollow (33b) formed in the center of the abutment and fixed to the fixture).

[0065] FIG. 8 is a schematic drawing showing a cross-section of an implant system including a prosthesis manufactured through an embodiment of the present invention, and is a drawing shown in the 'BB' direction in FIG. 4.

[0066] Referring to FIGS. 7 and 8, the implant system includes an abutment (30) and a prosthesis (40) (e.g., a single crown) that repairs a post (33) of the abutment (30). A hole (42) is formed on the upper portion of the prosthesis (40) into which a fixing member (50) for fixing the prosthesis (40) to the abutment (30) is inserted. The hole (42) is filled in later. A support jaw (43) is formed between the hole (42) and the receiving portion (41) to support the head of the fixing member (50) downward. The fixing member (50) has a screw portion so that it can be screw-connected to the hollow portion (33b) of the post (33).

[0067] In a design method of a digital library according to an embodiment of the present invention, a three-dimensional outer shape of a post (33) of a ready-made abutment (30) is designed, and a prosthesis (40) is manufactured using the digital library designed in this way. Accordingly, the manufactured prosthesis (40) does not reflect the cutting surface (33a) and / or cutting groove formed in the post (33). Preferably, the inner shape of the receiving portion (41) of the manufactured prosthesis (40) does not reflect the cutting surface (33a) and / or cutting groove formed in the post (33). That is, the inner surface of the receiving portion (41) of the prosthesis (40) may be formed in a truncated cone shape corresponding to the outer shape of the post (33). Accordingly, when a prosthesis (40) manufactured without reflecting the cutting surface (33a) and / or cutting groove formed on the post (33) is joined to the abutment (30), the inner surface of the receiving portion (41) of the prosthesis (40) can be uniformly joined to the outer periphery of the post (33) without causing problems such as early contact, which were pointed out as problems in the conventional method.

[0068] Fig. 9 is a drawing illustrating a digital library design method according to another example of the present invention, and is a schematic drawing showing a cross-section of a ready-made abutment cut in the 'AA' direction. Fig. 10 is a schematic drawing showing a cross-section of an implant system including a prosthesis manufactured using the method of Fig. 9 cut in the 'BB' direction.

[0069] Referring to FIGS. 9 and 10, a digital library design method according to another example of the present invention provides a digital library design method applicable to an implant system in which an arbitrary member (not shown) is interposed between a prosthesis (40') and an abutment (30) for a predetermined purpose.

[0070] As shown in Fig. 10, in the implant system, a buffering member (e.g., elastic material) is interposed between the prosthesis (40') and the abutment (30) to buffer the occlusal force applied to the prosthesis (40') during mastication. At this time, the buffering member may extend between the outer periphery of the abutment (33) and the inner surface of the receiving portion of the prosthesis (40'), and between the blunt jaw (32a) and the lower portion of the abutment (33).

[0071] Therefore, in a digital library design method according to another example of the present invention, when designing the three-dimensional outer shape of a ready-made abutment (30), the design is made by taking into consideration the thickness and volume of the buffer member. For example, as in FIG. 9, when designing the three-dimensional outer shape of a ready-made abutment (30), the outer shape is designed to be larger by the thickness 't1' at the outer periphery of the post (33) and the thickness 't2' at the blunt protrusion (32a). At this time, the thicknesses 't1' and 't2' may be the same as or slightly smaller than the thickness of the buffer member. Preferably, the thickness is formed to be slightly smaller than the thickness of the buffer member in consideration of the degree to which the buffer member is elastically deformed by the pressing force applied to the buffer member in a state where the prosthesis (40') is combined. In addition, the thicknesses 't1' and 't2' may be the same as or different from each other.

[0072] When manufacturing a prosthesis (40') using a digital library designed in the same manner as in FIG. 9, a gap (gap) corresponding to 't1' is formed between the inner surface of the receiving portion of the prosthesis (40') and the outer periphery of the post (33), as in FIG. 10, and a gap corresponding to 't2' is formed between the blunt jaw (32a) and the lower end of the prosthesis (40'). In this way, in a digital library design method according to another example of the present invention, the digital library is designed so that the inner surface of the receiving portion of the prosthesis in which the post is received has a larger receiving space than the overall outer shape of the post, taking into account the thickness and volume of the buffer member interposed between the prosthesis and the abutment. That is, when designing a digital library, the thickness and volume of the buffer member are reflected in advance to secure a space for inserting the buffer member, thereby allowing the buffer member to be inserted and installed more stably between the prosthesis and the abutment.

[0073] While preferred embodiments of the present invention have been described and illustrated using specific terms, such terms are solely intended to clarify the invention. It should be understood that various modifications and variations may be made to the embodiments and terms described herein without departing from the spirit and scope of the appended claims. Such modified embodiments should not be construed as separate from the spirit and scope of the present invention, but should be considered to fall within the scope of the appended claims.

[0074] [Explanation of symbols]

[0075] 10, 20, 30: Abutment

[0076] 11, 21, 33: Post

[0077] 11a, 33a: Cross-section

[0078] 21a: Cutting groove

[0079] 31: Joint

[0080] 31a: Screw

[0081] 32: Cuff

[0082] 32a: Blunt jaw

[0083] 33b: Hollow

[0084] 40, 40': Prosthesis

[0085] 41: Reception area

[0086] 42: Hall

[0087] 43: Support jaw

[0088] 50: Fixed member

Claims

1. A process of designing a digital library including three-dimensional external shape information of a ready-made abutment including a post having at least one of a cutting plane or a cutting groove formed on the outer periphery; and A process for manufacturing a prosthesis using a designed digital library; including; In the process of designing the above digital library, when designing the 3D external shape information of the above existing abutment, the distance between the intersection point and the outer periphery of the post along the circumference of the post on the same plane centered on the intersection point of the axis of the post and the perpendicular of the axis of the post is designed to be the same. Method for manufacturing a prosthesis for dental implant using a digital library.

2. A process of designing a digital library including three-dimensional external shape information of a ready-made abutment including a post having at least one of a cutting plane or a cutting groove formed on the outer periphery; and A process for manufacturing a prosthesis using a designed digital library; including; A method for manufacturing a dental implant prosthesis using a digital library, wherein in the process of designing the above digital library, when designing the three-dimensional external shape information of the above ready-made abutment, the three-dimensional external shape of the post is designed by considering the thickness or volume of the material interposed between the above prosthesis and the above ready-made abutment.

3. The process of designing a digital library containing the three-dimensional external shape information of the ready-made abutment; and A process for manufacturing a prosthesis using a designed digital library; including; A method for manufacturing a dental implant prosthesis using a digital library, wherein in the process of designing the above digital library, when designing the three-dimensional external shape information of the above ready-made abutment, the three-dimensional external shape of the post is designed by considering the thickness or volume of the material interposed between the above prosthesis and the above ready-made abutment.

4. In any one of paragraphs 1 to 3, A method for manufacturing a dental implant prosthesis using a digital library in which, in the process of designing the above digital library, the three-dimensional external shape information of the above-described ready-made abutment is designed, the three-dimensional external shape of the post is designed in a truncated cone shape.

5. In paragraph 2, The above absence is a method for manufacturing a prosthesis for a dental implant using a digital library which is an elastic body.

6. In any one of paragraphs 1 to 3, In the process of designing the above digital library, a method for manufacturing a prosthesis for a dental implant using a digital library designed using dental CAD / CAM (Computer Aided Design / Computer Aided Manufacturing) when designing the three-dimensional external shape information of the above-described ready-made abutment.

7. In paragraph 1, In the process of designing the above digital library, when designing the three-dimensional external shape information of the ready-made abutment so that the distance between the intersection and the outer periphery of the post along the circumference of the post on the same plane is the same, a method for manufacturing a prosthesis for a dental implant using a digital library, wherein the three-dimensional external shape information of the ready-made abutment is designed so that the distance between the outer periphery of the post on which the cutting plane or cutting groove is formed at the intersection matches the distance between the outer periphery of the post on which the cutting plane or cutting groove is not formed at the intersection.

8. In any one of paragraphs 1 to 3, The above post is a method for manufacturing a prosthesis for a dental implant using a digital library having a tapered structure in which the diameter becomes smaller as it goes upward.

9. In any one of paragraphs 1 to 3, The above-mentioned ready-made abutment is a method for manufacturing a prosthesis for a dental implant using a digital library consisting of a screw-integrated or screw-separated structure.

10. In any one of paragraphs 1 to 3, A method for manufacturing a prosthesis for a dental implant using a digital library, wherein the prosthesis is a single crown or a bridge crown.

Images