Dental implant system comprising the same, and method of manufacturing thereof

Abstract

The present invention relates to a dental implant system and a method for manufacturing the same, wherein a crown (artificial tooth / prosthesis) is fastened to an abutment with a fixing member (e.g., a screw) without adhesive. More specifically, the invention relates to a dental implant system and a method for manufacturing the same, wherein a fixing member insertion hole is formed penetrating the abutment to resolve the problem of reduced aesthetic appeal due to differences in physical properties and color between the crown and the resin when a fixing member insertion hole formed on the occlusal surface or buccal side (lip direction) is filled with resin, and the entry portion is positioned on the lingual side (tongue direction) to ensure the fixability of the crown while preventing the external exposure of the resin-filled portion.

Description

Technology Field

[0001] The present invention relates to a dental implant system and a method for manufacturing the same, wherein a crown (artificial tooth / prosthesis) is fastened to an abutment with a fixing member (e.g., a screw) without adhesive. More specifically, the invention relates to a dental implant system and a method for manufacturing the same, wherein a fixing member insertion hole is formed penetrating the abutment to resolve the problem of reduced aesthetic appeal due to differences in physical properties and color between the crown and the resin when a fixing member insertion hole formed on the occlusal surface or buccal side (lip direction) is filled with resin, and the entry portion is positioned on the lingual side (tongue direction) to ensure the fixability of the crown while preventing the external exposure of the resin-filled portion. Background Technology

[0002] A dental implant system basically consists of a fixture implanted into the alveolar bone, an abutment fixed to the fixture that supports the pressure corresponding to occlusal forces applied during chewing, and a crown (artificial tooth / prosthesis) that restores aesthetic beauty similar to natural teeth by restoring the upper part of the abutment, i.e., the post. Methods for fixing the crown to the abutment are broadly classified into adhesive fixation and fixation using a fixing device. Although the adhesive fixation method is simple to perform, its disadvantages have been pointed out, such as soft tissue inflammation caused by residual adhesive and the inconvenience of reattachment and repair. In contrast, the fixation method using a fixing device is widely used because it is easy to attach, detach, maintain, and manage.

[0003] However, conventional methods of fixing fixed components can result in a decrease in aesthetics. Typically, to secure the fixed component, an insertion hole is formed in the crown, and after fastening, the hole is filled with resin or similar materials. At this stage, differences in the physical properties and color of the crown material and the resin can cause the embedded area to appear dissimilar from the surroundings. Furthermore, discoloration and differences in gloss over time exacerbate this visual discrepancy. In particular, if the insertion hole is located on the buccal side (towards the lips) or the occlusal surface, the embedded area is directly visible during everyday conversation or smiling, thereby reducing the patient's aesthetic satisfaction. This issue is particularly pronounced in areas where aesthetics are emphasized, such as the anterior teeth, and significantly lowers the satisfaction of patients who expect a natural tooth-like appearance even after implant treatment. Prior art literature

[0004] (Patent Document 0001) KR 10-2034995 B1, 2019.10.15.(Patent Document 0002) KR 10-2024-0018759 A, 2024.02.14.(Patent Document 0003) KR 10-2023-0138661 A, 2023.10.05.(Patent Document 0004) KR 20-2019-0002056 U, 2019.08.13. The problem to be solved

[0005] Therefore, the present invention is proposed to solve the problems of the prior art, and the technical problem (objective) to be solved is as follows.

[0006] First, the first problem to be solved by the present invention is to provide a dental implant system and a method for manufacturing the same, which can prevent a decrease in aesthetics such as color tone inconsistency and discoloration caused by differences in physical properties and color between the crown and the resin by forming a fixing member insertion hole through the abutment so that the entry part faces the lingual side and allowing the fixing member to enter from the lingual side through this, thereby preventing the inevitable resin embedded part after fastening from being directly exposed to the exterior.

[0007] Secondly, the second problem to be solved by the present invention is to provide a dental implant system and a method for manufacturing the same that can improve the fixation stability of a crown by mechanically restraining and supporting the crown at two points, such that the head of the fixing member presses against the crown at the lingual entrance (first support point) and the threaded end of the fixing member (the end partially exposed in the buccal direction) engages and supports the crown in the concave receiving part of the crown (second support point).

[0008] Third, the third problem to be solved by the present invention is to provide a dental implant system and a method for manufacturing the same that can prevent micro-cracks and breakage inside the crown caused by point impact during mounting, dismounting, and mastication of the fixing member by rounding (curved surface) the end of the screw portion of the fixing member that is partially exposed on the buccal side, and can relieve stress concentration during repeated attachment and detachment.

[0009] Fourth, the fourth problem to be solved by the present invention is to provide a dental implant system and a method for manufacturing the same that can optimize the entry path of the fixing member and the position of the fixing member insertion hole according to clinical conditions without being constrained by the correction limit of conventional angle drivers (e.g., within about 25°) by forming a fixing member insertion hole that obliquely penetrates the abutment.

[0010] Fifth, the fifth problem to be solved by the present invention is to provide a dental implant system and a method for manufacturing the same that can improve precision and consistency throughout the entire laboratory and surgical process and ensure reproducibility between cases (individual clinical cases) by standardizing the shape of the lingual entry portion and the shape of the buccal concave receiving portion of the crown based on a digital library (CAD / CAM).

[0011] Furthermore, the present invention is not limited to the aforementioned problems, and various additional problems may be provided through the embodiments and technologies described in the claims below. means of solving the problem

[0012] To achieve the objective of the present invention, a dental implant system is provided comprising: an abutment having a fixing member insertion hole forming a through path from the lingual side to the buccal side; a crown restoring the abutment; and a crown fixing member inserted through the fixing member insertion hole to fix the crown to the abutment.

[0013] In addition, the above-mentioned fixing member insertion hole may include an entry portion formed on the lingual side and an exit portion formed on the buccal side.

[0014] Additionally, the crown fixing member may include a threaded portion inserted through the entry portion of the fixing member insertion hole and coupled to the fixing member insertion hole; and a head portion that fixes the crown to the abutment at the entry portion of the fixing member insertion hole.

[0015] In addition, the threaded portion of the crown fixing member may have at least a portion of its end protrude in the narrow direction through the exit portion of the fixing member insertion hole.

[0016] In addition, the threaded end of the crown fixing member may have a rounded shape.

[0017] Additionally, the crown may have a receiving groove formed therein into which the abutment is inserted, and an entry hole formed on the lingual side into which the threaded portion of the crown fixing member enters, and a concave receiving portion may be formed on the inner wall of the receiving groove facing the entry hole, in which the end of the threaded portion of the crown fixing member that has entered into the interior through the entry hole is caught and supported.

[0018] In addition, to achieve the objective of the present invention, a method for manufacturing a dental implant system is provided, comprising the steps of: manufacturing an abutment having a fixing member insertion hole having a penetrating path from the lingual side to the buccal side using a digital library, and a crown that aligns with said abutment; fixing said abutment to a fixture; aligning and coupling said crown to said abutment such that the entry hole of said crown faces the lingual side; inserting a crown fixing member into the fixing member insertion hole through the entry hole of said crown so that the head portion of said crown fixing member presses against said crown on the lingual side, and the end of the threaded portion of said crown fixing member passes through the exit portion of said fixing member insertion hole and is inserted into and caught in a concave receiving portion formed on the inner wall of the receiving groove portion of said crown; and embedding said crown's entry hole through an embedding portion.

[0019] In addition, the above-mentioned fixing member insertion hole may include an entry portion formed on the lingual side and an exit portion formed on the buccal side.

[0020] In addition, the threaded end of the crown fixing member may have a rounded shape. Effects of the invention

[0021] As explained above, the following effects can be obtained according to the embodiments of the present invention.

[0022] First, according to the present invention, by forming a fixing member insertion hole through the abutment so that the entry portion faces the lingual side, the implanted portion filled with resin, which is inevitably formed after the crown fixing member is secured, is not exposed to the frontal view, thereby preventing the appearance of a strangeness caused by color tone inconsistency, discoloration, and gloss difference resulting from the difference in physical properties and color between the crown and the resin material at the initial stage. Through this, the problem of reduced aesthetics that occurred when the implanted portion of the resin was directly exposed by forming an insertion hole on the buccal or occlusal surface as in the conventional method can be resolved.

[0023] Second, according to the present invention, the head portion of a fixing member that is coupled through the abutment first presses the crown at the lingual entrance, and the end of the threaded portion of the fixing member is caught in the concave receiving portion of the opposite (buccal) crown to secondarily press, thereby suppressing fine movement of the crown and increasing fastening stability under long-term masticatory loads through a double support (two-point catch) structure.

[0024] Third, according to the present invention, by rounding (curving) the end of the threaded portion of the fixing member that engages with the concave receiving portion of the crown, local stress concentration inside the crown caused by mounting of the crown fixing member and masticatory impact can be alleviated, thereby preventing microcracks and breakage of the crown.

[0025] Fourth, according to the present invention, by forming a through-type fixing member insertion hole in the abutment, the optimal entry path and hole position can be designed relatively freely according to the bone shape, implantation angle, and crown path for each case without being constrained by the correction limit (e.g., within about 25°) provided by conventional angle drivers, and this enables consistent lingual access even in cases where it was difficult to avoid buccal exposure, thereby ensuring both aesthetics and fastening.

[0026] Fifth, according to the present invention, the lingual entry portion of the crown, the shape of the buccal concave receiving portion, and the insertion hole of the fixing member of the abutment can be standardized based on a digital library (CAD / CAM), thereby improving precision and consistency throughout the entire process of fabrication, processing, and fastening. As a result, fitting and fastening results of the same quality can be reproduced even between cases with different patients, sites, and insertion angles, thereby reducing the possibility of unnecessary rework, such as reprocessing. Brief explanation of the drawing

[0027] FIG. 1 is a cross-sectional view showing a dental implant system according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing an abutment according to an example of the present invention. FIG. 3 is a cross-sectional view showing a crown fixing member according to an example of the present invention. FIG. 4 is a cross-sectional view showing a crown according to an example of the present invention. FIGS. 5 to 8 are drawings showing the manufacturing method of a dental implant system according to an embodiment of the present invention in process order. Specific details for implementing the invention

[0028] The advantages and features of the present invention and the methods for achieving them will become clear from the embodiments described below in detail in conjunction with the accompanying drawings. Furthermore, throughout this specification, the same reference numerals refer to the same components. Additionally, the size and shape of each component depicted in each drawing may be exaggerated for convenience of explanation and are not intended to be limiting. Moreover, where "A and / or B" is indicated, it may mean both A and B, or either A or B.

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0030] FIG. 1 is a cross-sectional view schematically showing a dental implant system according to an embodiment of the present invention.

[0031] Referring to FIG. 1, a dental implant system (10) according to an embodiment of the present invention includes an abutment (2) and a crown (5). The abutment (2) is coupled and fixed to a fixture (1) through an abutment fixing member (3), and the crown (5) is coupled and fixed to the abutment (2) through a crown fixing member (4). At this time, the abutment (2) may be formed integrally with the fixture (1).

[0032] FIG. 2 is a schematic cross-sectional view of an abutment according to an example of the present invention.

[0033] Referring to FIGS. 1 and 2, the abutment (2) includes a connecting portion (21) that is connected to the fixture (1), a post (23) that is restored by the crown (5), and a cuff (22) that connects the connecting portion (21) and the post (23). A hollow (2a) is formed in the center of the abutment (2) through which an abutment fixing member (3) is inserted, and a catch portion (2c) is formed on the inner wall of the hollow (2a) to which the head portion (32) of the abutment fixing member (3) is caught.

[0034] A fixing member insertion hole (2b) is formed in the post (23) of the abutment (2) through which a crown fixing member (4) is inserted. The fixing member insertion hole (2b) may be formed with a downward sloping structure from the lingual side to the buccal side as shown in FIG. 2, and may also be formed with an upward sloping structure or a horizontal structure depending on the case. This structure may vary depending on the convenience of operation when fastening or unfastening the crown fixing member (4) using a screwdriver tool.

[0035] FIG. 3 is a cross-sectional view schematically showing a crown fixing member according to an example of the present invention.

[0036] Referring to FIG. 3, the crown fixing member (4) includes a screw portion (41) and a head portion (42). The screw portion (41) has screw threads formed on its outer surface and is screwed into the fixing member insertion hole (2b), and its end penetrates the fixing member insertion hole (2b) and at least a portion protrudes through the exit portion. The end of the protruding screw portion (41) has a rounded portion (41a) formed therein to prevent breakage or microcracks in the crown (5) during the joining process and during use. The head portion (42) is formed with a larger diameter than the screw portion (41) and supports the crown (5) in the vertical direction as shown in FIG. 1. A driver groove (42a) is formed in the head portion (42) to which a driver tool, etc., is coupled.

[0037] FIG. 4 is a cross-sectional view schematically showing a crown according to an example of the present invention.

[0038] Referring to FIG. 4, the crown (5) is provided with an abutment receiving groove (5a) into which the post (23) of the abutment (2) is inserted, and on one side, an entry hole (5c) is formed into which the threaded portion (41) of the crown fixing member (4) enters from the lingual side. Additionally, a concave receiving portion (5b) is formed on the inner wall of the receiving groove (5a) at a position opposite to the entry hole (5c), into which the end of the threaded portion (41) of the crown fixing member (4) is inserted and supported. This crown (5) is manufactured using a digital library-based CAD / CAM process to match the shape of the abutment (2).

[0039] FIGS. 5 to 8 are schematic drawings illustrating a method for manufacturing a dental implant system according to an embodiment of the present invention, and are cross-sectional views illustrating each process.

[0040] Referring to FIGS. 2 to 4, first, an abutment (2) and a crown (5) are manufactured to be mutually aligned using a digital library (CAD / CAM). At this time, a fixing member insertion hole (2b) is formed in the abutment (2) that diagonally penetrates the post (23), and correspondingly, in the crown (5), a receiving groove (5a) in which the post (23) is seated, an entry hole (5c) in which the crown fixing member (4) enters from the lingual side, and a concave receiving portion (5b) in which the end of the threaded portion (41) of the crown fixing member (4) is caught and supported is formed on the inner wall of the receiving groove (5a) opposite the entry hole (5c).

[0041] Next, as shown in FIG. 5, the abutment (2) is fastened to the fixture (1) using the abutment fixing member (3), and then the position is checked so that the axis of the post (23) of the abutment (2) and the inclination direction of the fixing member insertion hole (2b) form a penetrating path for the lingual entry and the buccal end.

[0042] Next, as shown in FIG. 6, the crown (5) is attached to the abutment (2). At this time, the position is adjusted so that the post (23) is precisely seated in the receiving groove (5a) of the crown, and the direction of the crown (5) is adjusted so that the entry hole (5c) faces the lingual side. At this time, it is checked whether the contact surface between the receiving groove (5a) of the crown (5) and the post (23) of the abutment (2) is uniformly in contact over the entire surface.

[0043] Next, as shown in FIG. 7, the crown fixing member (4) is inserted into the interior of the crown (5) through the entry hole (5c). Using a screwdriver tool, the threaded portion (41) of the crown fixing member (4) is rotated to screw into the fixing member insertion hole (2b). As the fastening progresses, the head portion (42) of the crown fixing member (4) forms a pressure point (first support point) on the upper surface of the crown (5). At the same time, the end of the threaded portion (41) passes through the exit portion in the buccal direction and is inserted and caught (second support point) in the concave receiving portion (5b) of the crown (5), thereby mechanically restraining and fixing the crown (5) with a double-locking structure. At this time, the rounding treatment (41a) of the end of the threaded portion (41) serves to suppress internal stress concentration and breakage of the crown (5) during fastening, unfastening, and application of masticatory load.

[0044] Next, as shown in FIG. 8, when the fixation of the crown (5) using the crown fixing member (4) is completed, the entry hole (5c) is filled with resin or the like to form a filling part (6). At this time, the filling part (6) is molded and finished so that it becomes a continuous surface with the surface of the crown (5), and if necessary, the surface quality is uniformized through polishing and glossing. Finally, the alignment state of the crown (5), occlusal contact, interference with surrounding soft tissues, and the stability of the fixing member are checked to complete the assembly.

[0045] As described above, preferred embodiments of the present invention have been explained and illustrated using specific terms; however, such terms are used solely to clarify the invention. Furthermore, it is evident that various modifications and changes may be made to the embodiments and described terms of the present invention without departing from the technical spirit and scope of the following claims. Such modified embodiments should not be understood separately from the spirit and scope of the present invention, but should be considered to fall within the scope of the claims of the present invention. Explanation of the symbols

[0046] 10 : Dental Implant System 1 : Fixture 2 : Abutment 2a : Hollow (Abutment) 2b: Insertion hole for fixing member 2c: Locking tab 3: Abutment fixing member 4: Crown fixing member 5 : Crown 5a : Receiving groove 5b: Concave receiving section 5c: Entry hole 6 : Embedded section 21 : Connecting section 22 : Cuff 23 : Post 31, 41: Screw section 32, 42: Head section 41a: Rounding section 42a: Driver groove

Claims

Claim 1 A dental implant system comprising: an abutment including an entry portion formed on the lingual side and an exit portion formed on the buccal side, wherein a fixing member insertion hole is formed penetrating from the entry portion toward the exit portion; a crown having a receiving groove portion into which the abutment is inserted, an entry hole formed on the lingual side communicating with the entry portion of the fixing member insertion hole, and a concave receiving portion formed on the inner wall of the receiving groove portion opposite to the entry hole; and a crown fixing member including a screw portion inserted through the entry hole of the crown and the entry portion of the fixing member insertion hole and coupled to the fixing member insertion hole, and a head portion that fixes the crown to the abutment on the side of the entry portion of the fixing member insertion hole; wherein the end of the screw portion is formed in a rounded shape and at least a portion protrudes in the buccal direction through the exit portion of the fixing member insertion hole and is caught and supported by the concave receiving portion, and the head portion and the end of the screw portion caught and supported by the concave receiving portion each support opposing portions of the crown to fix the crown to the abutment. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 A method for manufacturing a dental implant system according to claim 1, comprising: a step of manufacturing an abutment having a fixing member insertion hole formed therein using a digital library, and a crown having an entry hole and a concave receiving portion formed therein and fitted to said abutment; a step of fastening and fixing said abutment to a fixture; a step of inserting said abutment into a receiving groove of said crown such that the entry hole of said crown faces the lingual side and communicates with the entry portion of said fixing member insertion hole, thereby joining said crown to said abutment; a step of inserting a threaded portion of said crown fixing member through the entry hole of said crown and the entry portion of said fixing member insertion hole to join said fixing member insertion hole; wherein, as the threaded portion of said crown fixing member is joined to said fixing member insertion hole, the head portion of said crown fixing member supports the lingual portion of said crown, and the end portion of said crown fixing member formed in a rounded shape protrudes in the buccal direction through the exit portion of said fixing member insertion hole and is supported by being caught in the concave receiving portion, thereby supporting said buccal portion of said crown, so that said crown in a mutually opposing portion A method for manufacturing a dental implant system comprising: a process of fixing to an abutment; and a process of embedding the entry hole of the crown into an embedding portion. Claim 8 delete Claim 9 delete

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