KR101842179B1 - Conical Sealing and Elastic binding Implant-abutment connection structure - Google Patents

Abstract

The present invention relates to an implant-abutment coupling structure between an implant fixture (hereinafter, referred to as an 'implant') and an abutment, wherein the abutment portion provided at one side of the implant and the abutment The abutment portion of the abutment has a conical design in which the abutment is tapered so that when the normal force is applied to the abutment, the abutment is tightly engaged with the implant, And the resilient portion does not prevent the abutment and the implant from coming into tight contact with each other and thereby preventing the abutment from being tightly engaged with the abutment.
Thus, according to the present invention, when the vertical force is applied, the abutment is tightly engaged with the implant and is tightly engaged, and the elastic portion does not prevent the abutment and the implant from being bonded without any gap. In addition, abutments are easily separated from the implant when an operator exerts a certain level of external force.

Description

[0001] Conical Sealing and Elastic binding [0002] Implant-abutment connection structure employing a conical sealing and elastic fastening method [

The present invention relates to an implant-abutment coupling structure, and relates to an implant-abutment coupling structure employing a conical design and an elastic coupling method.

In recent years, implant replacement has become a popular alternative to lost teeth. Such an implant treatment method is usually performed through a series of steps of forming an opening in an alveolar bone, fixing an implant (hereinafter, referred to as an 'implant fixture' in the narrow sense), fastening an abutment, and attaching a prosthesis. At this time, the most widely used method of combining the abutment and the implant is the screw method. The screwing method is very convenient for use because it is a three-piece type in which the abutment and the implant are screwed together (see FIG. 9B). However, when the screw is abnormally combined, a gap is created in the joining portion to propagate the bacteria and the alveolar bone is absorbed Serious side effects such as screw loosening or breakage, abutment breakage, etc. occur.

On the other hand, since a three-piece structure should be maintained in an implant having a diameter of about 3 to 6 mm in threading, the minimum thickness of each component may be only 0.1 mm according to the region (see 'tb' in FIG. 9B). When sustained occlusal forces are applied, fatigue fractures often occur with such thin thickness. In addition, the abutment and the implant can be seen as horizontal (flat), flat-end, or slip joint (conical interface, hereinafter referred to as "conical- Joints "). In the case of horizontal joints, abutments and implants are connected only by the force of a binder (screw or the like), and when the lateral force acting on the side is applied, fine cracks are formed between the abutments and the screw, Sometimes this happens. In the case of vertical conical joints, when vertical occlusal force is continuously applied, abutment is pushed into the implant and tightening sinking phenomenon occurs. As a result, fine crevices are prevented, side effects such as screw loosening and breakage Is often minimized, but it often happens that it is not easily removable when you want to remove an abutment for maintenance.

Finally, suppose you use a screw to attach an abutment to an implant and then permanently bond the prosthesis to the abutment. If the prosthesis is subsequently repaired or the prosthesis is temporarily removed for cleaning, an access hole (see reference numeral 1110 in FIG. 10B) must be provided on the prosthesis. You will be able to remove the prosthesis-abutment complex by loosening the screw through the hole and take the necessary action. This is called a screwmentable prosthesis. In screw-emptable prostheses, access holes are non-aesthetic, food can be caught, and fractures often occur with ceramic prostheses.

Reference numeral 1000, which is not described in FIGS. 9B and 10B related to the prior art, refers to an implant-abutment coupling structure, 1100 denotes an implant, 1200 denotes a screw, and 1300 denotes an abutment.

[references]

Published Patent Publication No. 10-2014-0130773 (Published Nov. 12, 2014)

Published Japanese Patent Application No. 10-2015-0072363 (published on June 26, 2015)

Patent Registration No. 10-1386560 (published on Apr. 17, 2014)

SUMMARY OF THE INVENTION The present invention seeks to solve the problems encountered in the conventional implant-abutment coupling method using screws.

In the present invention, the abutment and the implant are joined using a conical sealing and an elastic fastening method. Thanks to this, it is possible to prevent problems such as microbial deposit due to fine crevices, screw loosening / breakage, providing sufficient thickness for each part, and thus being safe from fatigue fracture. The abutment can be easily removed from the implant, You do not have to.

In the present invention, an elastic member is used as a binder instead of a screw, and a morpse taper between 2 degrees and 15 degrees is applied to the implant-abutment interface to obtain conical sealing. If the vertical force is applied continuously after the abutment is tightened on the implant, the abutment will firmly engage (sinking, sinking) more firmly on the implant due to the conical design. So that the elastic member acts as a coupling member so that the abutment does not come off the implant until it is sufficiently soaked.

The elastic member preferably includes an annular coil spring and a C-shaped elastic body. In addition, it is preferable that the cross section of the elastic member includes a circular shape, an elliptical shape, a teardrop shape, or an irregular round shape.

The combination of the abutment and the implant may include a submerged type, an internal submerged type, and an external type.

According to the present invention, when normal force is applied, the abutment fits tightly to the implant and fits together without any gap, and the elastic portion does not prevent the abutment and the implant from being bonded together without a gap. If an operator applies a certain level of external force, the abutment is easily separated from the implant. The implant-abutment structure, which is easily removable while tightly coupled, is easy to perform and maintain, and odor and bone loss due to bacterial deposition, gingivitis and periodontitis can be prevented.

In addition, in the present invention, since there is no thread passing through the abutment, it can be regarded as a two-piece structure rather than a three-piece structure. As a result, a sufficient thickness can be given to the abutment and the implant, Can be provided. Conventional screw-type three-piece implants occasionally fracture after several years of chewing motion when placing a diameter of 4.0 mm or less in the molar. Therefore, the recent trend is to use a diameter of 5.0 mm or more, and the problem is that ridge augmentation is additionally needed when the alveolar bone is narrow. According to the present invention, fatigue fracture will not be caused even when a diameter of 4.0 mm or less is used for a molar, and thus bone grafting necessity can be remarkably reduced.

Finally, complicated problems found in conventional screw systems are avoided because the access holes can be removed without piercing the occlusal surface. For example, an access hole often comes forward in the anterior portion, often resulting in aesthetic problems. Angled drivers have been developed to solve this problem. Since the access hole itself is eliminated by the present invention, the number of parts is reduced, the structure is simplified, side effects are reduced, and convenience is increased.

1 is a sectional view of an implant structure according to an embodiment of the present invention,
Fig. 2 is an exploded sectional view of the main part of Fig. 1,
FIG. 3A is a cross-sectional view illustrating a coupling process of an implant structure according to an embodiment of the present invention, FIG.
FIG. 3B is a sectional view for explaining the engagement position of the implant structure,
FIGS. 3C and 3D are schematic cross-sectional views illustrating a process of separating the implant structure,
4 is a cross-sectional view showing another embodiment of the present invention,
5 is a cross-sectional view illustrating another embodiment of the present invention;
6A and 6B are cross-sectional views showing still another embodiment of the implant structure,
7 is a sectional view showing still another embodiment,
8A and 8B are cross-sectional views illustrating a state before coupling and a state after coupling, respectively, for explaining another embodiment of the present invention;
9A and 9B are cross-sectional views for comparing the two-piece structure of the present invention with the prior art three-piece structure,
10A and 10B are cross-sectional views for comparing a structure having no access hole according to the present invention and a structure having a conventional access hole.

A detachable implant-abutment coupling structure 100 (hereinafter, referred to as an 'implant structure') according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 10B.

FIG. 1 is a cross-sectional view of an implant including an implant structure according to an embodiment of the present invention, FIG. 2 is a cross-sectional view illustrating a main part of FIG. 1, 3C and 3D are schematic cross-sectional views for explaining a process of separating the implant structure, and FIG. 4 is a cross-sectional view for explaining the implantable structure according to another embodiment of the present invention. FIG. 5 is a cross-sectional view showing still another embodiment of the present invention, Figs. 6A and 6B are cross-sectional views showing another embodiment of the implant structure, and Figs. 6A and 6B are cross- Figs. 8A and 8B are cross-sectional views illustrating a state before coupling and a state after coupling to explain still another embodiment of the present invention, and Figs. 9A and 9B are cross-sectional views for comparing the two-piece structure of the present invention with the prior art three-piece structure, and FIGS. 10A and 10B are views for comparing the structure of the present invention having no access hole and the structure having a conventional access hole Fig.

An implant structure 100 according to a preferred embodiment of the present invention includes an implant fixture 110 (hereinafter referred to as an 'implant', generally referred to as a 'fixture') placed in the alveolar bone 10, The implant 110 and the abutment 130 are in contact with each other at the engaging portion 113 and the engaging portion 133, respectively. The implant or the abutment includes the elastic part 150 so that the abutment can be easily fixed and removed when the implant is detached from the implant. The elastic portion 150 preferably includes an elastic member 153 including a coil spring to be described later and elastically deformable.

One side of the abutment 130 includes an engaging portion 133 having a shape corresponding to the engaging portion 113 to engage with and engage with the engaging portion 113 and the other side to engage with the restoring portion 113 . The engaging portion 113 and the engaging portion 133 are regions where the implant 110 and the abutment 130 are tapered and brought into contact with each other. The engaging portion 113 or the engaging portion 133 preferably includes an elastic portion that is elastically deformed when attaching and detaching (see FIGS. 3A, 3C, and 3D). The elastic portion should be provided with sufficient space so as not to interfere with the sinking (157a in FIG. 3B).

The elastic portion 150 includes an elastically deformable elastic member 153; An elastic member engaging groove 155 formed at one side of the elastic member 153 to be engageable with one of the engaging portion 113 and the engaging portion 133; The other side of the elastic member 153 is engaged with the elastic member groove 157 formed in the other of the engaging portion 113 and the engaging portion 133 in a region corresponding to the elastic member engaging groove 155 of the engaging position ). ≪ / RTI >

The elastic member 153 is positioned at the outer side of the engaging groove 155 or at the outermost lower side of the elastic member groove 157 in the locking position where the abutment is tightly engaged with the implant, Thereby coupling the abutment 130. If the elastic member 153 is applied with a vertical external force larger than the force for engaging the abutment 130 and the implant 110 in the detaching direction (separating direction), the elastic member 153 is moved in the elastic member engaging groove 155 Or the elastic member groove 157 so that the abutment 130 can be separated from the implant 110. It is preferable that the resilient portion 150 has a structure that does not interfere with the sinking phenomenon in the process of sinking the abutment 130 to be described later into the implant 110. The tapered structure is provided between the implant 110 and the abutment 130 to induce locking by sinking, but the angle of the taper structure in the present invention is larger than that of the locking taper (for example, 1.5 degrees) So that the abutment 130 can be removed from the implant 110 if necessary.

For example, as shown in FIG. 1 to FIG. 3D, the elastic member coupling groove 155 is recessed in the latch portion 133 of the abutment 130, and the elastic member coupling groove A case in which the elastic member groove 157 is formed in the implant engaging portion 113 at a position corresponding to the insertion portion 155 is described.

The elastic member 153 may be provided in various shapes that can be elastically deformed. For example, it is preferable that a part of the loop of the annular spring includes a cut shape (C shape). Further, the elastic member 153 includes a coil spring, and includes a ring or annular connection of the spring in a form partially shown in Fig. Of course, the elastic member 153 may include an annular shape in which a part of the ordinary rod shape is cut and elastically deformable.

The elastic member 153 may have an elliptical cross section as shown in FIG. The outer diameter, the diameter, the pitch, the depth of the elastic member engaging groove 155, etc. of the spring used as the elastic member 153 can be adjusted to the target binding force at the locking position of the abutment 130 coupled to the implant 110 .

It is preferable that the elastic member 153 be elastically deformed outwardly (in a direction of expansion, see Figs. 1 to 3d) or elastically deformed inwardly (in a direction of shrinkage, see Fig. 4 of another embodiment described later). This elastic deformation direction can be applied in the same manner as described above also in the case of the rod-like annular elastic member 153.

The elastic member engaging groove 155 is depressed in a shape corresponding to the elastic member 153 to receive the elastic member 153.

The depth (see d1 'in FIG. 2) of the elastic member engaging groove 155 should be formed to a length that accommodates the elastic member 153 even when the elastic member 153 is deformed to the maximum. The inlet side width (refer to 'Wa1' in FIG. 2) of the elastic member engaging groove 155 is preferably formed such that the elastic member 153 is guided during elastic deformation.

The elastic member groove 157 acts as a coupling member to maintain the position where the implant 110 and the abutment 130 are coupled. An upper side of the inlet side of the elastic member groove 157 is formed with a groove-like engaging protrusion 157b. The elastic member 153 has an upright wall-like shape extending in a vertical direction in the form of a depression corresponding to the shape of the elastic member 153 And a groove wall 157a. The grooved wall 157a has a space in which when the vertical force is applied after the abutment 130 and the implant 110 are coupled, a sinking phenomenon in which the engaging portion 113 and the engaging portion 133 are tightly engaged may occur As shown in FIG. That is, the elastic portion 150 is preferably provided so as not to interfere with sinking.

As shown in the enlarged cross-sectional view of FIG. 2, the elastic member 153 (see FIG. 2) is located at a position closer to the vertical extension line (see CL2 in FIG. 2) of the groove- (Refer to 'CL1' in FIG. 2) of the central axis of the elastic member engaging groove 155 is located outside the elastic member engaging groove 155, and the intervals are spaced apart (see 'K' in FIG. 2). With this structure, the elastic member 153 is coupled to the elastic member engagement groove 155 and the elastic member groove 157, and can be elastically deformed to the deformed position by an external force. That is, in this embodiment, when an external force is applied, the elastic member 153 received in the elastic member groove 157 is pushed to the inside of the elastic member engagement groove 155 (the diameter becomes smaller in the annular radial direction) The abutment 130 can be separated from the abutment.

The inclination angle (refer to 'B' in FIG. 2) of the engaging portion 113 and the engaging portion 133 is calculated in consideration of the target engaging force required to hold the position of the implant 110 and the abutment 130, The tapered structure of the present invention) and the precision, the material of the elastic member 153, the diameter, and the shape of the cross section. Diameter of the ring and the like are preferably selected.

An unexplained reference numeral '50' denotes a gum (gingiva).

The coupling process of the implant structure 100 having such a configuration will be described in detail with reference to FIGS. 3A and 3B. 3A, the abutment 130 is inserted into the implant 110 while the elastic member 153 is coupled to the elastic member engaging groove 155 in a state where the implant 110 is placed in the alveolar bone 10, As shown in Fig. By this pressing force, the annular elastic member 153 is contracted by the elastic deformation while being brought into contact with the engaging portion 133, and is guided to the inside of the elastic member engaging groove 155. When the abutment 130 further descends and the engaging portion 133 and the engaging portion 113 come into contact with each other, the elastic member engaging groove 155 and the elastic member groove 157 reach the engaging position corresponding to the position, The elastic member 153 is 'clicked' by the elastic force to expand outwardly while the elastic member 153 maintains the state of connection as shown in FIG. 3B, so that the implant 110 and the abutment 130 are fastened. At this time, the fastening force mainly acts on the elastic force of the elastic portion 150.

As shown in FIG. 3B, when a force smaller than the target binding force (see 'Y2') is externally applied, the abutment 130 does not move. However, when the vertical occlusal force (refer to 'Y1' of 3b) such as chewing food is applied, sinking occurs in which the abutment 130 tightly fits into the implant 110, So that the abutment 130 and the implant 110 are more tightly coupled. The implant 110 and the abutment 130 are made of a strong material including, for example, a titanium alloy. However, since the implant 110 and the abutment 130 are flexible, Is continuously pushed toward the implant 110. The portion indicated by the solid line in the elastic member engaging groove 155 of FIG. 3B is the engaging position, and the portion indicated by the dotted line is the sinking position. The difference between the coupling position and the sinking position is indicated by 'Ysink' in FIG. 3b.

The elastic member engaging groove 155 guides the elastic member 153 so as to be elastically deformable in the radial direction, and the elastic member groove 157 moves the elastic member in the vertical direction during the sinking process (in this process, So that the elastic member 153 is prevented from sinking.

The separation process of the implant structure 100 according to the present invention will now be described with reference to FIGS. 3c and 3d. 3C and FIG. 3D), the grooved hook 155a of the elastic member engaging groove 155 presses the elastic member 153 while pressing the elastic member 153 (see FIG. 3C and FIG. 3D) Is guided along the upper side of the elastic member groove 157 and moves to the inside of the elastic member engaging groove 155 as shown in FIG. 3D, the elastic member 153 is received in the elastic member engaging groove 155 side, so that the abutment 130 can be separated from the implant 110. As shown in FIG.

Therefore, according to the present invention, the abutment can stably maintain the state of being coupled with the implant, and can slightly move under a certain external force or less due to the interlocking force of the teeth. If an external force greater than the target binding force is applied, Abutment engagement structure in which the implant is separated from the implant. In addition, it is possible to provide an implant-abutment coupling structure that prevents contamination due to bacterial deposition to maintain a bonded state by means of sinking.

In addition, according to the present invention, it is possible to form a thick portion that can be formed in a thin thickness in the three-piece structure (1100-implant, 1200-screw, 1300-abutment) Can be prevented.

According to the present invention, even when the prosthesis 30 is temporarily removed, the access hole 1110 required in the prior art of FIG. 10B is also unnecessary as shown in FIG. 10A.

The implant structure 200 of another embodiment according to the present invention will be described in detail with reference to FIG. However, the same reference numerals as those of the above-described embodiments denote the same reference numerals as those of the above-described embodiments, and the same applies to the following embodiments.

In this embodiment, the elastic member groove 257 is formed in the implant 210, and the elastic member coupling groove 255 is formed long in the vertical direction in the abutment 230. In other words, the elastic member 253 according to the present invention is coupled to the implant 210, and when the abutment 230 is fastened, the elastic member 253 elastically deforms toward the implant 210 and expands.

In this embodiment as well, the engaging position and the sinking position will be described in detail with reference to an enlarged view of FIG. 3B as follows. The elastic member 253 expanded toward the elastic member groove 257 in the course of coupling of the abutment 230 to the implant 210 by the solid line portion of the elastic member engagement groove 255 of FIG. Quot; snapping " in the elastic member groove 257 and returning to the original position is the engagement position.

A position where the abutment 230 is sunk by an external force such as an occlusal force is indicated by a dotted line as a sinking position, and a difference between a coupling position and a sinking position is indicated as 'Ysink' in FIG.

The configurations of the present embodiment are the same as those of the above-described embodiment except for the configurations and positions described above, so detailed description thereof will be omitted.

FIG. 5 illustrates an implant structure 300 according to another embodiment of the present invention. The implant structure 300 includes an engaging portion 313 and an engaging portion 333 extending downward, And the elastic portions 350 are formed on the rotation preventing portions 315 and 335. The functions, actions, effects and the like of each constitution are the same as those of the above-described embodiment Therefore, detailed description will be omitted.

This implant structure 100, 200, 300, on the other hand, includes a submerged type, not shown, of various forms in which the abutment is combined with the implant 110, An internal submerged type, and an external type shown in FIG. 6B.

In the modified external type of FIG. 6B, the engaging portion 613 and the engaging portion 633 are also tapered, which is different from the conventional horizontal structure. As described above, in Figs. 1 to 4, a sinking shape is generated in which the abutment sinks further toward the implant 110 due to a force exerted from the outside at the engagement position. Then, as shown in FIGS. 6A and 6B, the external type, the nonsubmerged type, and the like are formed so as to have a taper shape different from the shape of the prior art at the interface between the abutment and the implant. It is designed so that it can be locked by sinking. Except for these differences, the operation, effect, and the like are the same as those of the above-described example, so that the description of the present embodiment is not specifically described below.

7 illustrates an implant structure 700 according to another embodiment of the present invention in which the cross section of the elastic member 753 is in the shape of a drop. In this case, it has a deformed teardrop shape from a regular elliptical shape, so that it is easy to combine and has a somewhat difficult structure to be detached, so that it is possible to maintain the coupling position and to make the detachment force different from that of a circular structure Respectively. The cross section of the elastic member 753 may be formed in various shapes including an irregularly rounded shape within a range that does not impair the technical idea of the present invention, 8A and 8B, the implant structure 800 according to another embodiment of the present invention exemplifies a case where the cross section of the elastic member 153 has an irregularly rounded shape.

8A is a cross-sectional view illustrating a process of coupling an abutment 830 to an implant 810, and FIG. 8B is a cross-sectional view illustrating an engagement state in which an implant 810 is coupled to an abutment 830. FIG. In this embodiment, unlike the above-described embodiment, the cross-sectional shape of the elastic member 850 is an irregularly rounded shape, the lower side in the radial direction is an oval shape with a slightly pointed oval shape, the upper side in the radial direction is an oval shape less in sharpness than the lower side, Is different from the above-described example in that it has a flat structure. Since the effects and the like are the same as those in the above-described example, the detailed description is omitted. However, the present embodiment is different from the above-described example in that a groove guide surface 857c is formed at the upper end of the elastic member groove 857 to have a rounded shape from the inner side to the outer side corresponding to the shape of the elastic member 853.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. The scope of the invention will be determined by the appended claims and their equivalents.

100: Implant structure 10: Alveolar bone
30: prosthesis 50: gums
110: Implant
113: engaging portion 315: arm rotation preventing portion
130: abutment 133:
335:
150: elastic part 153: elastic member
155: elastic member engaging groove 155a: groove engaging jaw
157: Elastic member groove 157a: Grooved lower jaw
157b: grooved jaw

Claims (6)

An abutment in which an elastic member engaging groove is formed in the engaging portion along the circumferential direction,
An annular elastic member having one side inserted into the elastic member engagement groove,
And an elastic fixture groove formed along the circumferential direction of the engaging portion to accommodate the other side of the elastic member when the engaging portion is inserted to abut the engaging portion, Hereinafter referred to as an " implant "),
Wherein the elastic member engaging groove and the elastic member groove are formed to be capable of supporting the elastic member so that the abutment and the implant can be engaged when the engaging portion is inserted in contact with the engaging portion,
Wherein one of the elastic member engaging groove and the elastic member groove has a radius larger than a predetermined load so as to receive the elastic member separated from the other one so that the abutment and the implant can be separated from each other, And the other of the elastic members is formed so as to secure a space in a direction of the elastic member when the pressing force is applied to the abutment to press the implant and the pressing force acts on the elastic member inserted into the elastic member Wherein the implant-abutment coupling structure is elongated along the axial direction. The method according to claim 1,
Wherein the resilient member comprises an annular coil spring. ≪ RTI ID = 0.0 > 18. < / RTI > The method according to claim 1,
The elastic member may have a shape that is partly annular in shape and elastically deformable

The implant-abutment coupling structure comprising: The method according to claim 2 or 3,
Wherein the resilient member has a circular cross section, an elliptical cross section, a teardrop shape or an irregular round cross section. The method according to claim 1,
Wherein the shape of the abutment and the implant is combined with each other, and the implant includes a submerged type, an internal submerged type, and an external type. Bertt joint structure. delete

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