Dental implant structure

Abstract

The present invention relates to a dental implant structure in which an abutment is fastened to a fixture implanted into an alveolar bone by means of an abutment screw, and more particularly, to a dental implant structure in which the head of the abutment screw is formed so as to protrude above a post of the abutment without being accommodated in the abutment, as a result, the inner diameter, which is the diameter of the inner space of the base, can be reduced, and the diameter and thickness of the column of the base can be freely formed in a desired size.

Description

Technical Field

[0001] The present invention relates to a dental implant structure with a separated base and screw, wherein the base is fastened to a fixing member implanted in the alveolar bone by the base screw, and more particularly, to a dental implant structure, wherein the head of the base screw is not accommodated in the base but is formed to protrude above the column of the base, thereby being able to reduce the diameter (inner diameter) of the inner space of the base, thereby being able to freely form the diameter and thickness of the column of the base in a desired size. Background Art

[0002] The dental implant structure basically includes: a fixture implanted in the alveolar bone; an abutment (support frame) fixed to the fixture and generating lateral or horizontal pressure in response to the bite force applied by chewing; and a crown (artificial tooth) covering and restoring the upper part of the abutment to provide an aesthetic similar to that of a natural tooth.

[0003] The abutment is fastened to the fixing member by the abutment screw. According to the structure of the abutment screw combined with the abutment, it can be roughly divided into an abutment screw integrated abutment and an abutment screw separated abutment. In the abutment screw integrated abutment, the abutment screw and the abutment are formed integrally, and in the abutment screw separated abutment, the abutment screw and the abutment are separated.

[0004] Figure 1 The figure is a cross-sectional view schematically showing a conventional abutment screw-separable abutment.

[0005] like Figure 1 As shown, the existing base screw separated base 2 is fastened to the fixing member 1 by the base screw 3. The base screw 3 includes: a screw portion 3a threadedly engaged with the fixing member 1; and a head 3b having a diameter larger than that of the screw portion 3a and hooked downward on the inner step portion 2d formed on the inner side of the base 2.

[0006] In this conventional abutment screw separated abutment 2, the structure that the head 3b of the abutment screw 3 is accommodated inside the abutment 2 prevents the diameter or thickness of the abutment 2 from being formed to a target value. That is, the head 3b of the abutment screw 3 is formed with a larger diameter than the screw portion 3a, so the diameter (inner diameter) of the inner space 2e of the abutment 2 for accommodating the head 3b also needs to be formed to be larger than the diameter of the head 3b in accordance with the diameter of the head 3b, so it is difficult to form the column 2c of the abutment 2 with the target value diameter or thickness.

[0007] The diameter (outer diameter) of the screw portion 3a of the ordinary base screw 3 is formed to be approximately 2.0 mm (standard screw diameter), and the head portion 3b is formed to be approximately 2.3 to 2.4 mm larger than the diameter of the screw portion 3a by approximately 0.3 to 0.4 mm. Therefore, the top diameter d2 of the base 2 needs to be at least approximately 0.5 mm larger than the diameter d1 of the head portion 3b of the base screw 3. Therefore, if Figure 1 As shown, the top diameter d2 of the column 2c of the abutment 2 should be at least 2.8 mm (the sum of the diameter d1 2.4 mm of the head 3b of the abutment screw 3 and the thickness t1 0.4 mm (0.2 mm×2) of the metal member forming the abutment 2).

[0008] Thus, in the abutment screw-separate abutment structure in which the head 3b of the abutment screw 3 is accommodated inside, the diameter d2 of the column 2c of the abutment 2 should be at least 2.8 mm. This makes it difficult for the abutment with such a structure to be applied to the mandibular anterior teeth. The mandibular anterior teeth are a part where the diameter of the teeth is relatively small. In order to make the mandibular teeth look natural, in most cases, the diameter d2 of the column 2c of the abutment 2 is required to be less than or equal to 2.8 mm. However, due to the above-mentioned reasons, the existing abutment structure cannot meet this requirement in most cases. Moreover, when the diameter of the column 2c is reduced, the angle of the outer wall of the column approaches 90°, which may cause difficulty in passing the crown.

[0009] Prior art literature

[0010] Patent Literature

[0011] Patent document 1: KR 10-2017-0102280A, 2017.09.08.

[0012] Patent document 2: KR 20-0467684Y1, 2013.06.21.

[0013] Patent document 3: KR ​​10-1210671B1, 2012.12.04. Summary of the invention

[0014] Problem that the invention aims to solve

[0015] As described above, with the inner space 2e for accommodating the head 3b of the abutment screw 3 being provided in the center of the abutment, the thickness of the column 2c of the abutment 2 (the thickness from the outer surface to the inner surface) can only be formed smaller. In addition, for the abutment 2 suitable for patients with smaller tooth widths, the gingival interface 2b is formed with a smaller diameter, and the lower end of the column 2c connected to the upper end face of the gingival interface 2b also corresponds to the smaller diameter of the gingival interface 2b, and can only be formed in a small size. Moreover, as described in Korean Patent No. 10-2323728, in order to absorb the bite force, in the structure in which an elastic ring is combined on the outer surface of the column, the diameter of the column becomes smaller because the thickness of the elastic ring needs to be considered.

[0016] Therefore, it becomes more difficult to form a coupling groove coupled with the elastic ring on the outer surface periphery of the column 2c of the base. For example, when the coupling groove is formed along the outer surface periphery of the column 2c of the base, an unnecessary hole (a hole connecting the outside of the column and the inner space 2e) is formed on the side of the column 2c, or the thickness of the coupling groove part becomes thinner, and it is difficult to apply the elastic ring to the base due to the fragility of this structure.

[0017] Therefore, the present invention is proposed to solve the existing overall problems, and the technical problem (purpose) to be solved is to provide a dental implant structure that can overcome the structural limitations of the abutment column diameter or thickness due to the reduction of the diameter of the inner space of the abutment in the abutment screw separate abutment structure.

[0018] In addition, as another problem to be solved by the present invention, a dental implant structure is provided, which does not affect the diameter and thickness of the column of the base, buffers the bite force applied by repeated chewing between the crown and the base, and can stably form a coupling groove for coupling with an elastic ring used to couple the crown and the base.

[0019] In addition, the present invention is not limited to the aforementioned objects, and various other objects can be further provided by the techniques described in the embodiments and claims described below.

[0020] Solutions for solving problems

[0021] In order to achieve the above-mentioned purpose, according to one embodiment of the present invention, there is provided a base screw separated dental implant structure, wherein the base is fastened to a fixing member implanted in the alveolar bone by a base screw, wherein the base screw comprises: a screw portion, which is combined with the fixing member through the inner space of the base; a connecting portion, which is formed at the upper part of the screw portion and is hung on the base in the downward direction; and a head, which is formed at the upper part of the connecting portion and protrudes toward the upper part of the base.

[0022] In addition, the diameter of the head portion may gradually decrease from the lower portion toward the upper portion.

[0023] In addition, a screwdriver hole may be formed in the head.

[0024] In addition, a vertical cross section may be formed on a side of the head.

[0025] In addition, a coupling groove coupled with the elastic ring may be formed on the periphery of the head.

[0026] In addition, an elastic ring in the shape of a C-ring or an O-ring may be coupled to the coupling groove.

[0027] In addition, the connection portion may be accommodated in the inner space of the base.

[0028] In addition, a hooking step portion may be formed at a boundary between the screw portion and the connecting portion, and the hooking step portion may be hooked downward on an inner step portion formed in the inner space of the base.

[0029] In addition, the connecting portion may be in a conical structure, with the diameter gradually increasing toward the upper portion.

[0030] In addition, a dental crown for covering the head and the post of the base is further included, and a receiving groove for receiving the head and the post of the base may be formed in the dental crown.

[0031] In addition, an elastic body may be provided between the accommodation groove and a crown accommodation portion, and the crown accommodation portion includes the head portion accommodated in the accommodation groove and a column of the abutment.

[0032] In addition, a base cap combined with the head portion and accommodated in the accommodation groove portion may be further included.

[0033] In addition, the base cap may include: a screw portion of the base cap, which is threadedly connected to the head of the base screw; and a head of the base cap, which is formed on the upper part of the screw portion of the base cap, pressurizing the inner wall of the accommodating groove portion toward the base side.

[0034] Effects of the Invention

[0035] As described above, according to the dental implant structure of the present invention, by providing a dental implant structure of a novel structure in which the head of the abutment screw is not accommodated in the abutment but protrudes toward the upper part of the column of the abutment, the diameter (inner diameter) of the inner space of the abutment can be effectively reduced, thereby freely forming the diameter and thickness of the column of the abutment to a desired size.

[0036] In addition, according to the dental implant structure of the present invention, a dental implant structure of a novel structure in which a coupling groove is formed on the head of the abutment screw protruding above the column of the abutment, and the coupling groove is combined with an elastic ring, can stably combine the crown and the abutment without using an adhesive without affecting the diameter and thickness of the column of the abutment. Furthermore, the elastic ring can smoothly and stably realize the removal of the crown, absorb the repeatedly applied bite force, and prevent the abutment and / or the fixing part from breaking.

[0037] In addition, according to the dental implant structure of the present invention, an elastic body is formed between the receiving groove formed in the crown and the crown receiving part (including the head of the abutment screw and the part of the abutment column) received inside the receiving groove of the crown, thereby blocking the crown from directly contacting the crown receiving part, thereby ensuring ample space between the crown and the crown receiving part for the elastic ring to smoothly contract and expand, and utilizing the elastic force of the elastic ring to absorb the bite force repeatedly applied to the crown, thereby preventing the crown, abutment and / or fixing parts from being broken due to repeated bite force, and preventing foreign matter from entering between the crown and the abutment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a cross-sectional view showing a conventional abutment screw-separate type abutment.

[0039] Figure 2 It is an assembly cross-sectional view showing the dental implant structure according to the first embodiment of the present invention.

[0040] Figure 3 is from Figure 2 A cross-sectional view showing a dental implant structure in a state where an abutment screw is separated.

[0041] Figure 4 It is a cross-sectional view for comparing Example 1 of the present invention with Comparative Example 1.

[0042] Figure 5 It is an assembly cross-sectional view showing a dental implant structure according to a second embodiment of the present invention.

[0043] Figure 6 is from Figure 5 A cross-sectional view showing a dental implant structure in a state where an abutment screw is separated.

[0044] Figure 7 It is an assembly cross-sectional view showing a dental implant structure according to Example 3 of the present invention.

[0045] Figure 8 It is a cross-sectional view for comparing Example 3 of the present invention with Comparative Example 2.

[0046] Fig. 9 It is an assembled cross-sectional view of a dental implant structure according to a fourth embodiment of the present invention.

[0047] Fig.10 yes Fig. 9 A cross-sectional view of the state of the combined crown.

[0048] Fig.11 : is a cross-sectional view showing a dental implant structure according to Example 5 of the present invention.

[0049] Fig.12 : is a cross-sectional view showing a dental implant structure according to Example 6 of the present invention. DETAILED DESCRIPTION

[0050] Hereinafter, the advantages, features and methods for achieving the advantages, features and methods of the present invention will become more clear with reference to the embodiments described in detail in conjunction with the accompanying drawings. In addition, throughout the specification, the same reference numerals represent the same components. In addition, the components shown in the various figures may be enlarged to show the size and shape, but this is only for the convenience of description and is not intended to be limiting. In addition, when recorded as "A and / or B", it may represent A and B, or it may represent A or B.

[0051] In order to achieve the aforementioned problems (objectives) to be solved, the present invention provides a dental implant structure of a novel structure in which the head of the abutment screw is not accommodated inside the abutment but is formed to protrude above the column of the abutment. That is, in the dental implant structure of the present invention, the head of the abutment screw is formed to protrude above the column of the abutment, which can reduce the diameter (inner diameter) of the inner space of the abutment, thereby freely forming the diameter and thickness of the column of the abutment to a desired size.

[0052] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0053] Example 1

[0054] Figure 2 is a cross-sectional view schematically showing an assembly of a dental implant structure according to Embodiment 1 of the present invention, Figure 3 yes Figure 2 The cross-sectional view of the dental implant structure shown in the figure is a state where the abutment screw is separated. Here, for the sake of convenience of explanation, the crown is omitted.

[0055] Reference Figure 2 and Figure 3 The dental implant structure 10 of the first embodiment of the present invention includes a base screw 13 which is connected through the inner space (hollow) 12e of the base 12 and has an upper portion protruding toward the upper portion of the column 12c of the base 12.

[0056] like Figure 3As shown, the base screw 13 includes: a screw portion 13a, which is threadedly connected to the fixing member 11 implanted in the alveolar bone; a connecting portion 13b, which is formed on the upper part of the screw portion 13a and is accommodated in the inner space 12e of the base 12; a head 13c, which is Figure 2 As shown, it is formed at the upper portion of the connecting portion 13 b so as to protrude toward the upper portion of the column 12 c of the base 12 .

[0057] A hooking step portion 13d is formed at the boundary between the screw portion 13a and the connecting portion 13b and is hooked downwardly on the inner step portion 12d of the base 12. The outer surface of the lower portion of the connecting portion 13b connected to the screw portion 13a has a vertical surface, and the upper portion connected to the head 13c has a larger diameter and may be a tapered structure with an inclined surface on the outer surface.

[0058] On the other hand, when the inner step portion 12d of the base 12 is not formed and the tapered portion a1 performs the function of the hook portion, the hook step portion 13d of the base screw 13 can be omitted. In this case, the tapered surface s1 of the base screw 13 recessed toward the inner side of the column 12c of the base 12 is in contact with the tapered portion a1 of the base 12 and is hooked to each other.

[0059] like Figure 2 As shown, the head 13c is a portion protruding toward the upper portion of the column 12c of the base 12 so as to be accommodated in the interior of the crown (not shown) together with the column 12c of the base 12, and the diameter gradually decreases from the lower portion to the upper portion, and has a tapered structure with an inclined surface on the outer surface, so that it can be stably accommodated in the crown. In addition, a screwdriver hole 13e for inserting a screwdriver tool can be formed at the upper end of the head 13c.

[0060] like Figure 3 As shown, the base 12 includes: a connecting portion 12a, which is connected to the fixing member 11; a gingival interface 12b, which is formed at the upper part of the connecting portion 12a and has a larger diameter and a tapered structure with an inclined surface on the outer surface; and a column 12c, which is formed at the upper part of the gingival interface 12b and has a smaller diameter and a tapered structure with an inclined surface on the outer surface, and is accommodated in the crown. An outer step portion 12f with a step difference is formed at the boundary between the gingival interface 12b and the column 12c.

[0061] Figure 4 is a cross-sectional view for comparing Example 1 of the present invention with Comparative Example 1. Figure 1 The structure is the same as that of an example of the prior art shown.

[0062] Reference Figure 4 In Example 1 of the present invention, the height h1 of the column 12 c of the base 12 is shortened to be smaller than the height h2 of the column 2 c of the base 2 of Comparative Example 1.

[0063] In Example 1 of the present invention, the head 13c of the base screw 13 is formed to protrude above the column 12c of the base 12, so as to partially replace the role (combined with the crown) played by the column 2c of the base 2 in the existing implant structure of Comparative Example 1. As a result, it can be freely formed without being restricted by the diameter or thickness t1 of the inner side space 2e of the column of the base 2, which is a problem in the existing implant structure.

[0064] In addition, in the implant structure of Comparative Example 1, an inner space 2e for accommodating the head 3b of the base screw 3 must be formed inside the base 2, so the thickness t1 of the column 2c of the base 2 can only be shortened by an amount corresponding to the diameter of the inner space 2e, resulting in weakened strength and increased risk of fracture. However, in Example 1 of the present invention, as the base screw 13 is formed into a structure without a hollow, the thickness of the upper end diameter d11 is thicker than the thickness t1 of the column 2c of Comparative Example 1, so that the strength can be improved.

[0065] Example 2

[0066] Figure 5 is a schematic assembly cross-sectional view of a dental implant structure according to a second embodiment of the present invention, Figure 6 is from Figure 5 The cross-sectional view of the dental implant structure shown in the figure is a state where the abutment screw is separated. Here, for the sake of convenience of explanation, the crown is omitted.

[0067] Reference Figure 5 and Figure 6 As in the first embodiment, the dental implant structure 20 of the second embodiment of the present invention comprises a fixing member 21, a base 22 and a base screw 23. However, compared with the first embodiment, in the second embodiment, the diameter d12 of the head 23c of the base screw 23 accommodated in the interior of the dental crown is smaller.

[0068] In the second embodiment, in order to loosen and tighten the base screw 23 using a tool such as a ratchet, a vertical section (23d, see the circled view) is formed on the outer surface of the head 23c instead of the screwdriver hole formed in the head 23c of the base screw 23. Thus, in the second embodiment, the vertical section 23d is formed on the outer surface instead of the screwdriver hole formed in the head 23c of the base screw 23, so that the diameter d12 of the head 23c of the base screw 13 of the first embodiment can be formed smaller.

[0069] Example 3

[0070] Figure 7 is a cross-sectional view schematically showing an assembly of a dental implant structure according to a third embodiment of the present invention, Figure 8It is a cross-sectional view for comparing Example 3 of the present invention with Comparative Example 2. Here, for the convenience of description, the crown is omitted.

[0071] Reference Figure 7 As in the first embodiment, the dental implant structure 30 of the third embodiment of the present invention includes a fixing member 31, a base 32 and a base screw 33. However, in the third embodiment, an elastic member of a ring structure is formed on the periphery of the head 33c of the base screw 33, that is, a coupling groove 33d for coupling with the elastic ring (34, see the circled view) is formed in a band shape. In this case, the coupling groove 33d can also be formed as one or more than two.

[0072] The elastic ring 34 can adopt a C-ring or an O-ring structure. When the O-ring structure is adopted, the ring can be made of a silicone rubber material or a synthetic rubber or a thin nitinol wire. In addition, when the C-ring structure is adopted, a metal rod or plastic such as nitinol can be used. This elastic ring 34 buffers the impact caused by the bite force applied to the crown during chewing between the column 32c of the crown and the base and the head 33c of the base screw 33. At the same time, even if no adhesive is used, the crown is combined with the base 32 and the base screw 33 to prevent the crown from accidentally falling off.

[0073] In addition, in the implant structure of Comparative Example 2, an inner space 4e for accommodating the head 3b of the base screw 3 is formed inside the base 4, so the thickness of the column 4c of the base 4 is shortened by an amount corresponding to the diameter of the inner space 4e. Here, when the coupling groove 4d is further formed, the thickness t3 of the column 4c of the base 4 is thinner at the part where the coupling groove 4d is formed, resulting in a through hole formed in the formation process of the coupling groove 4d, which may cause a problem of communication with the inner space 4e. However, in Example 3, the head 33c of the base screw 33 is not hollow, so the thickness t2 is fully ensured, and the problem in the implant structure of Comparative Example 2 does not occur.

[0074] That is, Figure 8 As shown, in Comparative Example 2, the inner space 4e is formed in the base 4, but in Example 3, no hollow space is formed in the head 33c of the base screw 33 formed to protrude outside the column 32c of the base 32. Therefore, even if the engaging groove 33d is formed on the periphery of the head 33c of the base screw 33, there will be no structural problems caused by the thickness of the head 33c of the base screw 33.

[0075] When manufacturing a crown, a peripheral groove (not shown) for partially inserting the elastic ring 34 may be formed on the inner peripheral edge of the crown corresponding to the elastic ring 34. When the crown is mounted on the column 32c of the base 32, the elastic ring 34 is horizontally coupled to the peripheral groove formed on the inner side of the crown and the coupling groove 33d formed on the head 33c of the base screw 33. Thus, the crown can be fixed to the base 32 without using an adhesive.

[0076] On the one hand, when installing the dental crown, the column 32c of the base 32 and the head 33c of the base screw 33 are accommodated in the receiving groove on the inner side of the dental crown. Hereinafter, for the sake of convenience, the column 32c of the base 32 and the head 33c of the base screw 33 accommodated in the receiving groove formed on the inner side of the dental crown are collectively referred to as the "dental crown receiving portion". By inserting an elastic elastomer (not shown) between the dental crown receiving portion and the dental crown receiving groove, a dental crown that can cope with occlusal force can be made. At this time, the elastomer can also be coated or bonded to the outer surface of the dental crown receiving portion. Alternatively, it can also be coated or bonded to the inner side wall of the dental crown receiving groove. Alternatively, the elastomer can also be formed thinner as a separate product and inserted between the dental crown receiving portion and the dental crown receiving groove.

[0077] Example 4

[0078] Fig. 9 is a schematic assembly cross-sectional view of a dental implant structure according to a fourth embodiment of the present invention. Fig.10 It is schematically shown Fig. 9 A cross-sectional view of the state of the combined crown.

[0079] Reference Fig. 9 and Fig.10 Similar to the first embodiment, the dental implant structure 40 of the fourth embodiment of the present invention includes a fixing member 41, an abutment 42 and an abutment screw 4. Moreover, in order to more stably and tightly fix the crown 45 to the column 42c of the abutment 42 and the head 43c of the abutment screw 43, an abutment cap 44 is included which is threadedly coupled to the upper part of the abutment screw 43.

[0080] The base cap 44 includes a screw portion 44a coupled to the head portion 43c of the base screw 43. The screw portion 44a is threadedly coupled to the thread groove portion 43d of the head portion 43c of the base screw 43 via a thread 141a formed on the outer peripheral surface. In addition, the base cap 44 includes a head portion 44b formed on the upper portion of the screw portion 44a. A screwdriver hole 44c may be formed in the central upper portion of the head portion 44b for coupling with a screwdriver tool when assembling or separating the base cap 44 from the head portion 43c of the base screw 43. At this time, the screwdriver hole 44c may be formed in, for example, a hexagonal shape, a star shape, a cross shape, or the like. On the one hand, as Fig.10As shown, in order to tightly fix the crown 45, the outer surface of the head 44b of the base cap 44 corresponds to the inner side of the crown 45, and has a conical structure with an inclined surface whose diameter increases toward the upper part. Alternatively, it can be a "T" shaped structure.

[0081] Example 5

[0082] Fig.11 1 is a cross-sectional view schematically showing a dental implant structure according to Example 5 of the present invention, showing a state where an abutment screw is separated from an abutment.

[0083] Reference Fig.11 As in the first embodiment, the dental implant structure 50 of the fifth embodiment of the present invention includes a fixing member 51, a base 52, and a base screw 53. However, unlike the first embodiment, in the screw portion 53a of the base screw 53, the thread 53b is not formed on the entire upper and lower portions of the screw portion 53a, but is substantially formed only on the lower portion that is threadedly coupled with the thread 51a formed on the fixing member 51.

[0084] Example 6

[0085] Fig.12 1 is a cross-sectional view schematically showing a dental implant structure according to Example 6 of the present invention, showing a state where an abutment screw is separated from an abutment.

[0086] Reference Fig.12 As in the fifth embodiment, the dental implant structure 60 of the sixth embodiment of the present invention includes a fixing member 61, a base 62 and a base screw 63. However, unlike the fifth embodiment, the outer surface 63d of the connecting portion 63b of the base screw 63 is a conical structure, having an inclined surface whose diameter increases toward the head 63c. Moreover, the inner surface 62a of the base 62 to which the outer surface 63d of the connecting portion 63b is connected is also a conical structure, having an inclined surface identical to the inclined surface of the connecting portion 63b.

[0087] On the one hand, the base screws 13, 23, 33, 43, 53, 63c proposed in embodiments 1 to 6 of the present invention are structured such that the diameter of the head 13c, 23c, 33c, 43c, 53c, 63c gradually decreases from bottom to top. That is, the head 13c, 23c, 33c, 43c, 53c, 63c is a conical structure, and its diameter gradually decreases from the base side toward the upper part. In addition, the head 13c, 23c, 33c, 43c, 53c, 63c can also be a cylindrical structure. With this structure, the head 13c, 23c, 33c, 43c, 53c, 63c can be easily accommodated in the crown.

[0088] Although specific terms are used to describe and illustrate preferred embodiments of the present invention, these terms are only used to clearly illustrate the present invention. Moreover, it is obvious that various changes and variations can be applied to the embodiments of the present invention and the described terms 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 regarded as falling within the scope of the claims of the present invention.

Claims

1. A dental implant structure with a separated base and screw, wherein the base is fastened to a fixing member implanted in the alveolar bone by a base screw, It is characterized in that The base screw comprises: The screw part is connected with the fixing member through the inner space of the base. A connecting portion is formed on the upper portion of the screw portion and is hooked on the base in a downward direction, and A head portion is formed at an upper portion of the connecting portion and protrudes toward an upper portion of the base; The dental implant structure further comprises: a dental crown, the dental crown being used to cover the head and the column of the base, wherein a receiving groove portion for receiving the head and the column of the base is formed in the dental crown; and A base cap is combined with the head and accommodated in the accommodation groove.

2. The dental implant structure according to claim 1, in, The diameter of the head gradually decreases from the lower part toward the upper part.

3. The dental implant structure according to claim 1, in, A screwdriver hole is formed in the head.

4. The dental implant structure according to claim 1, in, A vertical section is formed on a side surface of the head.

5. The dental implant structure according to claim 1, in, A coupling groove for coupling with the elastic ring is formed on the periphery of the head.

6. The dental implant structure according to claim 5, in, An elastic ring in the shape of a C-ring or an O-ring is coupled to the coupling groove.

7. The dental implant structure according to claim 1, in, The connecting portion is accommodated in the inner space of the base.

8. The dental implant structure according to claim 1, in, A hooking step portion is formed at a boundary between the screw portion and the connecting portion, and the hooking step portion is hooked downward on an inner step portion formed in the inner space of the base.

9. The dental implant structure according to claim 1, in, The connecting portion is formed into a tapered structure, and the diameter gradually increases toward the upper portion.

10. The dental implant structure according to claim 1, in, An elastic body is provided between the receiving groove and the crown receiving portion, and the crown receiving portion includes the head portion received in the receiving groove and a column of the base.

11. The dental implant structure according to claim 1, in, The base cap comprises: The screw portion of the abutment cap is threadedly engaged with the head portion of the abutment screw; and The head of the abutment cap is formed on an upper portion of the screw portion of the abutment cap and presses the inner wall of the accommodation groove portion toward the abutment side.

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