KR20180128193A - Implant unit - Google Patents

Abstract

The present invention relates to a dental implant unit. The purpose is to provide an improved implant unit capable of effectively absorbing and dispersing a load transmitted from the outside and preventing the phenomenon of concentration of stress on a specific site to prolong the life and prevent damage to an alveolar bone. To this end, the implant unit includes an artificial root attached to the alveolar bone and having a long hole; an intermediate structure inserted into the long hole of the artificial root; and a protruding part which includes an abutment coupled to the intermediate structure, has a curvature defined by the bottom surface of the lower end of the inner surface of the long hole in the artificial tooth root, and has a curvature corresponding to the bottom surface of the long hole in the lower end of the intermediate structure.

Description

Implant unit < RTI ID = 0.0 >

The present invention relates to an implant unit, and more particularly, to a dental implant unit capable of effectively protecting an alveolar bone through absorption and dispersion of a load transmitted from the outside.

Artificial teeth are artificially created teeth that can be almost identical to human natural teeth in appearance and function. Such an artificial tooth can be used as a substitute for a natural tooth in the case where a natural tooth is missing due to various factors such as a cavity. In general, three approaches are known to replace natural teeth with artificial teeth, depending on the symptoms and prognosis of the dental disease, such as bridge, denture, or alveolar bone implant.

In the case of the bridge, since the healthy adjacent teeth must be shaved, natural teeth may be damaged, the masticatory force is weakened because there is no root of the artificial teeth, and the life span of the bridged tooth is not as long as ten years. In the case of the dentures, damage of the natural teeth is inevitable, and there are disadvantages such as a phenomenon in which the alveolar bone is gradually absorbed in the process of using the alveolar bone, separation from the oral cavity during use, or the user can feel a foreign body in the mouth. Therefore, the application of bridge and denture is gradually decreasing for patients with strong alveolar bone.

On the other hand, as long as the alveolar bone is maintained in a condition suitable for treatment, the implant method of implanting the artificial tooth into the alveolar bone enables the independent treatment without damaging the adjacent natural teeth, and after the implantation, The application is gradually expanding because it has excellent appearance and function. Further, there is an advantage that the life of the implant unit is semi-permanent depending on the management state.

However, if regular or irregular loads in the oral cavity are repeatedly applied to the implant unit due to actions such as chewing or tipping of the food, the alveolar bone implanted with the implant unit is destroyed or the alveolar bone is absorbed due to the continuous stress concentration And may cause additional pathologies or shorten the life of the implant unit.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to effectively absorb and disperse a load transmitted from the outside and to concentrate stress on a specific site, The present invention is directed to an improved implant unit.

In order to accomplish the above object, according to one embodiment of the present invention, there is provided an artificial tooth root which is coupled to an alveolar bone and has a long hole; An intermediate structure inserted into the elongated hole of the artificial root; And an abutment coupled to the intermediate structure, wherein a bottom surface of the lower end of the inner surface of the elongated hole has a predetermined curvature, and a protrusion having a curvature corresponding to the bottom surface of the elongated hole is formed at a lower end of the intermediate structure And the implant unit is provided with an implant unit.

According to another aspect of the present invention, there is provided an artificial tooth root, which is coupled to an alveolar bone and has a long hole; An intermediate structure inserted into the elongated hole of the artificial root; And an abutment member coupled to the intermediate structure, wherein a clearance is formed between the inner surface of the elongated hole of the artificial tooth root and the surface of the intermediate structure, and an elastic member for absorbing and buffering the load between the elongated hole of the artificial tooth root and the intermediate structure And the implant unit is installed.

Thus, in the implant unit according to the present invention, the intermediate structure, the abutment and the resilient member capable of absorbing the impact are provided between the abutment and the artificial root, so that the intermediate structure and the abutment are finely flowed And the intermediate structure and the abutment portion can be resiliently displaced together with the shock absorbed by the elastic member.

Therefore, it is possible to appropriately absorb and disperse the load externally applied by the shock absorbing action of the elastic member, the fine flow and position restoration of the intermediate structure and the abutment, and the stress concentration phenomenon that may occur at a specific site can be effectively prevented have.

As a result, the life of the implant unit can be prevented and the alveolar bone can be prevented from being damaged. By effectively absorbing and dispersing the load and relieving stress concentration, it is possible to use an implant unit having a relatively small diameter, It is possible to reduce the number of operations, reduce post-operative pain, shorten the period of healing, and reduce medical costs.

Further, a protrusion having a predetermined curvature corresponding to the bottom surface is formed at the lower end of the intermediate structure, which is coupled to the elongated hole of the artificial tooth root, at the lower end of the artificial root, , The integrally bonded intermediate structure and the abdominal position can be maintained as long as possible in the central position in the long hole of the artificial root and the load transferred from the abutment to the intermediate structure through the abutment can be dispersed over a wide area.

As a result, alveolar bone destruction, alveolar bone absorption due to continuous stress concentration, and additional pathology can be suppressed, and the life of the implant unit can be prolonged.

1 is a cross-sectional view illustrating an implant unit according to an embodiment of the present invention.
2A and 2B are cross-sectional views illustrating a state in which an intermediate structure is coupled to an artificial root in an implant unit according to an embodiment of the present invention.
3 is an enlarged cross-sectional view of a bottom surface shape of a long hole in an artificial root of an implant unit according to an example of the present invention.
4A and 4B are bottom perspective views of an intermediate structure and abutment in an implant unit according to an embodiment of the present invention.
5 is a cross-sectional view illustrating an implant unit according to another embodiment of the present invention.

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

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed to the person skilled in the art, Is not limited to the following examples. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

In the following drawings, the thickness and the size of each layer may be exaggerated for convenience and clarity of description, and the same reference numerals in the drawings denote the same elements.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms herein may include plural forms unless the context clearly dictates otherwise. Also, in this specification, "comprise" and / or "comprising ", when used in this specification, specify the presence of stated shapes, numbers, steps, operations, elements, elements and / But does not preclude the presence or addition of other features, numbers, operations, elements, elements, and / or groups.

Although the terms first, second, etc. are used herein to describe various elements, parts, regions, layers and / or sections, these elements, parts, regions, layers and / It is self-evident. These terms are only used to distinguish one member, component, region, layer, and / or portion from another member, component, region, layer, and / or portion. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

FIG. 1 is a cross-sectional view illustrating an implant unit 100 according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are sectional views showing a state in which an intermediate structure 120 is coupled to an artificial root 110.

1, an implant unit 100 according to an embodiment includes an artificial root fixture 110 which is embedded in an alveolar bone AB and has a long hole 111 therein, a long hole 111 of an artificial root 110, And an abutment 130 coupled to the intermediate assembly 120. The abutment 130 may be formed of a metal or a metal. The implant unit 100 may further include a coupling member 140 installed at a central position of the intermediate structure 120 and coupling the abutment 130 to the intermediate structure 120. [ A prosthesis (crowm) 150 such as an artificial tooth may be mounted on the abutment 130 mounted on the upper end of the intermediate structure 120. In other embodiments, the intermediate structure 120 and the abutment 130 may be integrated, but the present invention is not limited thereto.

The artificial root 110 may be directly embedded in the alveolar bone AB covered with the gums G to serve as a pillar. In one embodiment of the present invention, the maximum diameter or width of the artificial root 110 coupled to the alveolar bone AB may be within a range of 1 mm to 8 mm, preferably within a range of 2 mm to 5 mm .

The outer circumferential surface of the artificial root 110 may be embedded in the alveolar bone AB and fused with the alveolar bone. To this end, a thread 118 may be formed on the outer circumferential surface of the artificial root 110. In this case, the artificial root 110 can be fixed to the alveolar bone AB by screwing at the time of implantation. The axial movement of the artificial tooth root 100 is induced until the artificial root 100 reaches a predetermined position and / or depth in the alveolar bone AB during threading. When a threaded artificial root (100) is rotated in the alveolar bone, a spiral bone is formed on the alveolar bone (AB) by the threads (118) of the outer circumferential surface, and after the artificial root is placed, The inner surface of the alveolar bone including the bone of the helix is fused to each other, so that the artificial tooth root 100 can be fixed

The artificial root 110 is made of one kind of metal such as titanium (Ti), tungsten (W), aluminum (Al), hafnium (Hf), niobium (Nb), tantalum (Ta), zirconium (Zr) Or two or more kinds of alloys. The metal materials forming the artificial root 110 are illustrative and the present invention is not limited thereto. The metal material may be any other metal or non-metal ceramic artificial bone material having no corrosion and suitable strength and biocompatibility Or a composite material thereof may be applied to the artificial root 110.

The artificial root 110 is made of calcium phosphate ceramics such as hydroxyapatite [Ca ₁₀ (PO ₄ ) ₆ (OH) ₂ , HA] having excellent bioactivity so as to promote the reactivity with the alveolar bone AB on the surface, Coating layer. In another embodiment, TiO ₂ , Ta ₂ O ₅ , Nb ₂ O ₅ , ZrO ₂ , SiO ₂ , RuO ₂ , MoO ₂ , MoO ₃ , VO, VO ₂ , V ₂ O ₃ , V ₂ O ₅ , CrO _2, or CrO ₃ may be coated. These materials are illustrative and those skilled in the art will appreciate that any material capable of promoting osseointegration as a coating material may be applied.

Referring to FIG. 2A, the artificial root 110 includes an elongated hole 111 formed at a predetermined depth downward from the center of the upper surface. At this time, the long hole 111 may be formed long from the center of the upper surface of the artificial root 110 along the longitudinal direction of the artificial root. Also, the slot 111 includes a concave bottom surface 112 formed in the lower end region as a part of the inner surface, and the bottom surface may have a predetermined curvature.

In one embodiment, the elongated cavity 111 of the artificial root 110 includes a first vertical surface 113 extending or connected upwardly from the bottom surface 112 as part of the inner surface, a second vertical surface 113 extending from the first vertical surface 113 A first vertical surface 116 extending upwardly from or connected to the first engagement surface 114 and a second vertical surface 116 extending upwardly from or connected to the second vertical surface 116. [ And an inclined surface (117). The first fastening surface 114 may have a first structure 115 for fastening with the intermediate structure 120 described below. The first structure 115 may be threaded on the first fastening surface 114. The thread has a predetermined pitch (P1) and a cross-sectional width (A), wherein the pitch of the threads means the distance between two adjacent threads, and the cross-sectional width of the threads means the distance between two adjacent balls.

In one embodiment, the first inclined surface 117 may have a shape that is inclined at a predetermined angle when viewed on the longitudinal plane of the artificial root 110 as shown in Figs. 2A and 2B. The long hole 111 may have a shape in which the diameter is increased while being directed upward by the first inclined surface 117.

In one embodiment, the first vertical surface 113 or the second vertical surface 116 of the elongated hole 111 is exemplary only, and may be a tapered surface, a curved surface, or a combination surface thereof having an appropriate angle other than the vertical surface, May have any shape capable of providing a suitable space for accommodating the intermediate structure 120 and may be referred to as a receiving surface capable of accommodating the intermediate structure 120. [

In one embodiment, the bottom surface 112 of the elongated hole 111 may be formed at least partially in a curved surface. 2A and 2B, the shape of the bottom surface 112 may be a curved shape or may be a curved shape based on the surface shape on the longitudinal side surface of the artificial root 110. In this case, 112 may be a straight line shape and the remaining shape may be a curved line shape.

In one embodiment, the bottom surface 112 may have a different radius of curvature on a longitudinal section of the artificial root 110, i.e., on a region-by-region basis, i.e., on a defined section on a longitudinal section. In another embodiment, the bottom surface 112 of the elongated hole 112 may be formed to have a shape in which the radius of curvature gradually decreases from the outer portion to the central portion where the first vertical surface 113 is connected. The variation of the radius of curvature may be continuous.

The bottom surface 112 of the elongated hole 111 is divided into a plurality of sections between the outer portion and the central portion where the first vertical surface 113 is connected on the vertical plane of the artificial root 110, The divided sections may have different radii of curvature. In one embodiment, the bottom surface 112 may be formed such that the radius of curvature of the sections gradually decreases from the outer portion to the central portion. In an embodiment, the entire section of the bottom surface 112 is divided into a plurality of sections, The boundary portion may be seen to be distorted in appearance, but is not limited thereto. In one embodiment, as exemplified in Figs. 2A and 2B, the entire bottom surface can be formed into a single curved shape (shape of a curved line without bending on a longitudinal plane) without bending at the boundary portion of the section, The radius of curvature may be set differently for each section defined on the plane 112 and may be set so that the radius of curvature of the sections gradually decreases from the outer portion of the bottom surface 112 toward the center.

3 is an enlarged cross-sectional view showing the shape of the bottom surface 112. As shown in Fig.

Referring to FIG. 3, the bottom surface 112 may have different radii of curvature R1, R2, and R3 for each predetermined section of the cross section from the outer portion to the central portion. At this time, (R1 < R2 < R3). In one embodiment, the change in radius of curvature may be linear or more than a second-order change, and the present invention is not limited thereto. Further, the change of the radius of curvature may be continuous.

In FIG. 3, three curvature radii R1, R2, and R3 are illustrated. However, the present invention is not limited to the illustrated examples. The shape of the bottom surface 112 determined according to the division or setting of the section having a different radius of curvature or the radius of curvature determined for each section may be variously changed from the illustrated embodiment.

The intermediate structure 120 may include a protrusion 121 having a curved surface with a predetermined curvature. The protrusion 121 may be formed at the lower end of the intermediate structure 120 and the surface of the protrusion 121 may be formed to face the bottom surface 112 of the inner surface of the elongated hole 111 of the artificial root 110. The protrusion 121 of the intermediate structure 120 may have a rate of change of the same curvature corresponding to the curvature of the bottom surface 112. [

In one embodiment, when the intermediate structure 120 is inserted into the elongated hole 111 of the artificial root 110, the surface of the protrusion 121 is spaced from the bottom surface of the elongated hole 111 The shape of the protrusion 121 or the shape of the intermediate structure 120 can be set. In one embodiment, the intermediate structure 120 may include a mounting portion 121a on which the first elastic member 125 described later is installed. The mounting portion 121a may be formed at the lower end of the intermediate structure 120 and may be formed at the center of the protrusion 121. [

In one embodiment, the mounting portion 121a may be formed in a groove shape that can be installed in a state where the first elastic member 125 is accommodated at the central position of the projection 121. [ At this time, the surface of the protrusion 121 may have a curved surface shape of a predetermined curvature instead of a flat surface. In another embodiment, the surface of the protruding portion 121 has a curved convex shape downwardly, and at least a part of the periphery of the outer periphery of the mounting portion 121a is recessed while being directed to the mounting portion 121a (in FIGS. 2A and 2B, ). &Lt; / RTI &gt;

In one embodiment, the bottom surface 112 of the elongated hole 111 formed in the artificial root 110 may include a raised portion 112a that protrudes upward and protrudes upward toward the center. And the upper surface of the protrusion 112a can be brought into contact with the first elastic member 125 provided on the mounting portion 121a of the intermediate structure 120. [

In one embodiment, the surface of the protrusion 121 may be formed as a curved surface rather than a flat surface. The surface of the protrusion 121 on the longitudinal side surface of the intermediate structure 120 as shown in Figs. 2A and 2B may have a curved shape. The surface shape of the protrusion 121 on the longitudinal section may be a curved shape or a part of the entire surface may be a straight line shape and the other may be a curved shape. In one embodiment, the surface of the protrusion 121 may have a predetermined curvature corresponding to the bottom surface 112 of the elongated hole 111 described above.

Similar to the bottom surface 112 of the hole 111, the surface of the protrusion 121 may have a different radius of curvature on a longitudinal section of the intermediate structure 120, that is, on a predetermined section on the longitudinal section. In one embodiment, the surface of the protrusion 121 may be formed to have a shape in which the radius of curvature gradually decreases from the outer portion to which the third vertical surface 122 is connected to the center position.

The surface of the protrusion 121 is divided into a plurality of sections between the outer portion where the third vertical surface 122 is connected on the vertical plane of the intermediate structure 120 and the mounting portion 121a, The divided sections may have different curvature radii. In one embodiment, the surface of the protrusion 121 may be formed such that the radius of curvature of the sections gradually decreases from the outer portion to the central position.

The shape of the bottom surface 112 and the protrusion 121 as described above is such that the intermediate structure 120 and the abutment 130 are integrally coupled and are positioned as far as possible in the long hole 111 of the artificial tooth root 110 It can help. Even if the intermediate structure 120 and the abutment 130 are finely moved up or down or finely moved laterally by the clearances G1, G2 and G3 described later, the intermediate structure 120 and the abutment 130 can be moved to the artificial root 110 so as to be able to move to the center as much as possible.

The bottom surface 112 has a curved surface having a predetermined curvature while having a shape protruding upward from the center while being projected upward and a curved surface having a predetermined curvature, Since the portion corresponding to the base portion 112a has the recessed shape, the interaction between the corresponding surfaces in a wider area appears as compared with a case in which the surfaces of the bottom surface 112 and the protruding portion 121, which are the corresponding surfaces, And the dispersion of the load can be made in a wider area. Accordingly, the load unit and the stress are dispersed over a large area, so that the implant unit 100 and the alveolar bone AB can be effectively protected.

In one embodiment, the intermediate structure 120 includes a plurality of protrusions 121 extending from or connected to the protrusions 121, respectively, as part of the outer surface and defining a first vertical surface 113 of the elongated hole 111 formed in the artificial root 110. A second fastening surface 123 extending upwardly from or connected to the third vertical surface 122 and fastened to the first fastening surface 115 of the elongated hole 111, And a connecting surface 127 connected to the abutment 130 and extending or connected upward from the abutment surface 130. [

The artificial root 110 and the intermediate structure 120 may have clearance between the both sides and the clearance may be formed between the inner surface of the elongated hole 111 and the lower end of the intermediate structure 120, Can be formed between the surfaces of the side portions. Thereby, the intermediate structure 120 can be moved or flow finely at the artificial root 110 embedded in the alveolar bone AB through the clearance.

The clearance may include a first clearance G1 formed between the lower surface of the inner surface of the elongated hole 111 of the artificial root 110 and the lower surface of the intermediate structure. The first clearance G1 may include the clearance between the bottom surface 112 of the inner surface of the elongated hole 111 and the protrusion 121 of the intermediate structure 120. In addition, the first clearance G1 is extended upward to increase the clearance between the first vertical surface 113 of the inner surface of the elongated hole 111 of the artificial root 110 and the third vertical surface 122 of the intermediate structure 120, .

The first clearance G1 between the artificial root 110 and the intermediate structure 120 allows fine movement and movement of the intermediate structure 120 at the artificial root 110. More specifically, when the intermediate structure 120 receives a load from the outside through the abutment 130 while the artificial root 110 is fixed to the alveolar bone AB, the elongated hole 111 of the artificial tooth 110, The intermediate structure 120 located inside can be finely moved up and down by the first clearance G1.

As a result, since the intermediate structure 120 can flow from the artificial root 110 without the artificial root 110 and the intermediate structure 120 being combined into a rigid body, A variety of irregular loads, such as torsion, can be appropriately absorbed and dispersed into the flow of the intermediate structure 120 while the load applied to the intermediate structure 120 in the oral cavity is continuously applied, The stress that can be concentrated on a specific portion of the structure 120 can be dispersed. As a result, the load can be absorbed and dispersed, stress dispersion can be performed, and the implant unit 100 and the alveolar bone AB can be protected.

The second fastening surface 123 may have a second structure 124 for fastening with the artificial root 110 and the second structure 124 may be threaded on the second fastening surface 123. [ have. The thread formed as the second structure 124 has a predetermined pitch P2 and a cross sectional width B and is provided with a first thread 110 formed on the first fastening surface 114 of the inner surface of the long hole 111 of the artificial root 110, That is, the thread of the elongated hole 111 which is the first structure. The artificial root 110 and the intermediate structure 120 can be threaded by the thread of the first fastening surface 114 and the thread of the second fastening surface and the intermediate structure 120 is inserted into the long hole 111 So that it can be fastened to the artificial root 110.

Referring to FIG. 2B, it can be seen that the artificial root 110 and the intermediate structure 120 are coupled to each other by fastening between the first structure 115 and the second structure 124. That is, in one embodiment, when the first structure 115 and the second structure 124 are both threaded, the artificial root 110 and the intermediate structure 120 are screwed together by the threads on both sides, will be.

In one embodiment, when the artificial root 110 and the intermediate structure 120 are in threaded engagement, a second clearance is formed between the first thread, which is the first structure 115, and the second thread, which is the second structure 124, (G2). The second clearance G2 can be continuously formed between the first structure 115 and the second structure 124 and allows the relative movement of the intermediate structure 120 and the artificial root 110.

The intermediate structure 120 is inserted and screwed into the elongated hole 111 of the artificial root 110 so that the first structure 115 formed on the first fastening surface 114 as the inner peripheral surface of the long hole 111 And the second structure 124 formed on the second fastening surface 123, which is the outer peripheral surface of the intermediate structure 120, has a male thread shape.

The second clearance G2 may be formed when the relationship between the width W1 of the first structure 115 and the width W2 of the second structure 124 is W1 > W2. Here, the width W1 of the first structure 115 may be a long hole diameter (inner diameter) in the first structure, and the width W2 of the second structure 124 may be a width of the intermediate structure in the second structure Outer diameter).

The second clearance G2 may be set to a predetermined value so that the threaded state of the artificial root 110 and the intermediate structure 120 can be maintained in a state where the first structure 115 and the second structure 124 are threaded, (Gap) between the surface of the first thread, which is the one structure 114, and the surface of the second thread, which is the second structure 124, in FIG.

2A and 2B, when the pitch P1 of the first screw thread and the pitch P2 of the second screw thread are the same (P1 = P2), the second clearance G2 is set to a value The relationship between the long hole diameter W1 in the valley of the first structure 115 and the intermediate structure diameter W2 at the thread end of the second structure 124 in the form of male thread is W1 > W2.

2B, the second clearance G2 is set so that the cross-sectional width A of the first screw thread and the cross-sectional width A of the first screw thread are different from each other when the cross-sectional width A of the first screw thread and the cross- 2 &lt; / RTI &gt; thread width (B) is A &gt; B.

The formation of the second clearance G2 is illustrative and those skilled in the art will appreciate that any of the first and second structures 115 and 124, which may form a clearance between the artificial root 110 and the intermediate structure, It will be understood that the present invention can be applied.

The intermediate structure 120 can flow relatively finely with respect to the artificial root 110 in the second clearance G2 and the intermediate structure 120 can be smoothly moved by the first clearance G1 and the clearance G2, The load applied to the intermediate structure can be appropriately dispersed as well as stress concentration can be prevented from concentrating on the artificial root 110 and the specific portion of the intermediate structure 120.

In one embodiment, the intermediate structure 120 is interposed between the artificial root 110 and the intermediate structure 120, which flows by the clearances G1 and G2, And an elastic member for supporting the elastic member. Here, the elastic member may include a first elastic member 125 installed on the mounting portion 121a formed at the lower end of the intermediate structure 120. [ The elastic member may further include a second elastic member 126 installed on a side surface of the intermediate structure 120 so as to contact the inner surface of the elongated hole 111 of the artificial root 110 as described later.

The first elastic member 125 may be installed to contact the bottom surface 112 of the inner surface of the elongated hole 111 of the artificial root 110. At this time, the first elastic member 125 is inserted between the bottom surface 112 of the elongated hole 111 of the artificial root 110 and the lower end of the intermediate structure 120, and is guided through the first clearance G1 The intermediate structure 120 is brought into contact with the bottom surface 112 when the intermediate structure 120 flows finely so that the intermediate structure 120 is elastically supported on the bottom surface 112 of the elongated hole 111. The first elastic member 125 absorbs impact and load applied to the intermediate structure 120 downwardly and can be concentrated on the artificial root 110 and a specific portion of the intermediate structure 120 It acts to disperse the stress.

2A and 2B, the first elastic member 125 may be installed in the mounting portion 121a formed at the central position of the projection 121 in the intermediate structure 120, The first elastic member 121a provided on the mounting portion 121a may be brought into contact with the upper surface of the raised portion 112a formed on the bottom surface 112 of the elongated hole 111. [

The first elastic member 125 may include at least one of polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), poly-carprolactone, gelatin, chitosan, hyaluronic acid, and alginic acid And the like. These materials are illustrative and those skilled in the art will appreciate that any material capable of absorbing and dispersing loads can be applied.

In addition, a spring 125 'may be disposed on the first elastic member 125, and preferably a spring 125' may be disposed inside the first elastic member 125. The first elastic member 125 having the spring 125 'can have a predetermined restoring force and the first gap G1 and the second gap G2 between the artificial root 110 and the intermediate structure 120, (Gap) between the first and second plates. The spring 125 'may be a metal spring capable of resilient restoration, and may be in the form of a coil spring or a plate-like, linear or spherical shape capable of being resiliently reshaped after bending And the like. The enumeration for the spring is exemplary, and the present invention is not limited thereto.

This allows the intermediate structure 120 to move relative to the artificial root 110 within the range of the first clearance G1 or the second clearance G2 when the intermediate structure 120 is subjected to an external load, And can be returned to the original state by the restoring force of the first elastic member 125 and the spring 125 'after descending within the range of the first clearance G1 or the second clearance G2.

In one embodiment, the first elastic member 125 and the spring 125 'allow the artificial root 110 and the intermediate structure 120 to be resiliently mutually supported, and an elastic restoring force is applied to the artificial root 110 and the intermediate structure 120, (120) at regular intervals. Particularly, due to the movement of the intermediate support body 120 moving up and down through the first clearance G1 and the second clearance G2 and the restoring force of the first elastic member 125 and the spring 125 ' 120 may be appropriately dispersed, such as a load applied continuously, such as torsion, and the stress that can be concentrated on the artificial root 110 and a specific region of the intermediate structure 120 may be dispersed have.

The second elastic member 126 is installed to provide a buffering action between the inner surface of the long hole 111 of the artificial root 110 and the side surface of the intermediate structure 120 inserted in the long hole 111. The second elastic member 126 may have a ring shape. The intermediate structure 120 may have a side groove 126A formed in the side surface portion for mounting the second elastic member 126 and the second elastic member 126 may be assembled in the side surface groove 126A, (Not shown).

The second elastic member 126 may be fixed to the inner surface of the elongated hole 111 of the artificial root 110 so as to be in contact with the side surface of the intermediate structure 120. For this purpose, The second elastic member 126 may be inserted into the groove of the inner surface of the long hole 111 after the groove (not shown) is formed on the inner surface.

The second elastic member 126 may be installed above the second fastening surface 123 as illustrated in FIGS. 2A and 2B.

In one embodiment, the second elastic member 126 is made of polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), poly-carprolactone, gelatin, chitosan, hyaluronic acid, Alginic acid, and alginic acid. The enumeration of the second elastic member 126 is illustrative, and the present invention is not limited thereto.

In one embodiment, the connecting surface 127 has a connecting surface A (127A) whose diameter is decreasing while going upward and a connecting surface B (127A) extending or connected upwardly from the connecting surface A (127A) 127B, and a connecting surface C (127C) extending or connected upward from connecting surface B (127B) and decreasing in diameter while going upward.

The connecting surface 127 may be a tapered surface having a predetermined angle, a curved surface, or a combined surface thereof, or may have any other shape formed in combination with the abutment 130 described later. The enumeration of the connecting surface 127 is illustrative, and the present invention is not limited thereto.

The connecting surface 127 of the intermediate structure 120 is a portion where the abutment 130 is coupled to the outside, and the shape of the cross section may be a triangular, square, pentagonal, or hexagonal polygonal shape. This makes it possible to surely prevent the abutment 130 from being rotated in the intermediate structure 120 or the intermediate structure 120 from being rotated in the abutment 130. It will be appreciated by those skilled in the art that the shape of the polygon is exemplary and that any polygonal shape capable of preventing relative rotation of abutment 130 or intermediate structure 120 may be applied.

A coupling groove 128 may be formed at the center of the intermediate structure 120 and a coupling member 140 for coupling the abutment 130 to the intermediate structure 120 is coupled to the coupling groove 128. The coupling member 140 may be, for example, a screw. In one embodiment, a thread is formed on the inner circumferential surface of the coupling groove 128, and the coupling member 140 is screwed into the coupling groove 128 by the thread.

The abutment 130 may be mounted on the upper end of the intermediate structure 120 to form an intermediate structure-abutment joint. The abutment 130 may include a second beveled surface 131 that corresponds to the first beveled surface 117 of the artificial root 110 as at least a portion of the outer surface and may include a second beveled surface 131 The abutment 130 may have an upwardly extending diameter.

It is also preferable that a clearance is formed between the inner surface of the long hole 111 of the artificial root 110 and the outer surface of the abutment 130. The first inclined surface 117 of the artificial root 110 and the second inclined surface 131 of the abutment 130 may be spaced apart from each other and have a third clearance G3. This third clearance (G3) allows the relative movement of the intermediate structure-abutment assembly and the artificial root. That is, the relative movement between the combined body of the intermediate structure 120 and the abutment 130 and the artificial tooth 110 can be enabled by the third clearance G3 between the first inclined surface 117 and the second inclined surface 131 . For example, as the external load is applied, the combined body of the intermediate structure 120 and the abutment 130 can be finely moved upward and downward from the artificial root 110. At this time, the first inclined face 117 and the second inclined surface 131 corresponding thereto.

Since the inclined interface formed by the first inclined surface 117 and the second inclined surface 131 is located on the upper portion of the implant unit 100, the load and the stress can be dispersed in the upper portion of the implant unit 100.

When the load is transmitted from the implant unit 100 to the alveolar bone AB by the clearances G1, G2 and G3 formed at the upper and lower portions of the implant unit 100 as described above, The load can be transmitted and dispersed. Since the load can be dispersed through the upper and lower portions of the implant unit 100 contacting with a part of the implant unit 100, for example, the alveolar bone AB and the gum G, the alveolar bone AB can be prevented from being absorbed can do.

In one embodiment, a third elastic member 132 for buffering may be provided between the artificial root 110 and the abutment. More specifically, the third elastic member 132 may be interposed between the inner surface of the elongated hole 111 of the artificial root 110 and the side surface of the abutment 130. In one embodiment, the third elastic member 132 may be provided in mutually spaced spaces between the first inclined surface 117 and the second inclined surface 131, and may have a ring shape.

The third elastic member 132 may be provided on the side surface of the abutment 130. The abutment 130 may have a side surface groove 132A formed in the side surface of the abutment 130 for mounting the third elastic member 132, The side groove 132A may be formed in the second inclined surface 131 as illustrated in FIGS. 2A and 2B. The third elastic member 132 can be coupled to the abutment 130 by being inserted and assembled into the side groove 132A.

Or the third elastic member 126 may be provided on the inner surface of the long hole 111 of the artificial tooth 110 so as to be in contact with the side portion of the abutment 130 (for example, a second inclined surface in the vicinity of the abdomen) A groove (not shown) may be formed on the inner surface of the elongated hole 111 of the artificial root 110 and a third elasticity may be applied to the groove of the inner surface of the elongated hole 111 Member 126 can be inserted and installed.

The third elastic member 132 may include at least one of polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), poly-carprolactone, gelatin, chitosan, hyaluronic acid, May be included. The enumeration of the third elastic member 132 is illustrative, and the present invention is not limited thereto.

As described above, the intermediate structure 120 is coupled to the elongated hole 111 of the artificial root 110, and the load transmitted from the abutment 130 and the prosthesis 150 can be absorbed and dispersed together with the artificial root 110 . The intermediate structure 120 may be formed of any one selected from titanium (Ti), surgical stainless steel, gold (Au), white ceramic zirconium (Zr), and the like. These materials are exemplary, and it will be understood by those skilled in the art that any material capable of dispersing the load and having sufficient rigidity as described above as the intermediate structure 120 can be applied.

4A is a bottom perspective view of intermediate structure 120 and abutment 130 in an implant unit according to an embodiment of the present invention.

Referring to FIG. 4A, the intermediate structure 120 may have a protruding portion 121 having a predetermined curvature, and a mounting portion 121a may be formed at a center position of the protruding portion 121. The first elastic member 125 is provided on the mounting portion 121a and the surface of the protruding portion 121 is formed into a shape recessed while the mounting portion 121a at least partially surrounding the periphery of the mounting portion 121a And the upper and lower sides thereof).

In addition, the surface of the protrusion 121 may have a different radius of curvature on a longitudinal section of the intermediate structure 120, that is, on a region-by-region basis, that is, on a predetermined section on the longitudinal section. At this time, the surface of the protrusion 121 may have a shape in which the radius of curvature gradually decreases from the outer portion where the third vertical surface 122 is connected to the center position.

The intermediate structure 120 also includes a third vertical surface 122 extending from the protrusion 121 or connected thereto, a second fastening surface 123 extending or connected from the third vertical surface 122, a second fastening surface 123 extending from the second fastening surface 123, Or connected surfaces (not shown in Figure 4A).

The second fastening surface 123 is formed with a second structure 124 for fastening with the artificial root, and the second structure 124 may be threaded. A second elastic member 126 may be provided on the side surface of the intermediate structure 120.

4A, the connection surface of the intermediate structure 120 is a portion where the abutment 130 is coupled to the outside, and the abutment 130 may include a second inclined surface 131, The abutment 130 may have a shape in which the diameter of the abutment 130 is increased while the abutment 130 is moved upward. A third elastic member 132 may be provided on a side surface of the abutment 130. [

4A, the shape of the transverse section (taken along the line A-A ') of the intermediate structure 120 at the protruding portion 121 and the third vertical surface 122 may be circular, (121) may be a single structure integrally formed without being divided. In addition, the cross-sectional shape of the intermediate structure 120 in the protruding portion 121 and the third vertical surface 122 is not limited to a circular shape, and may be, for example, a polygonal shape of a quadrangular shape, a pentagonal shape or a hexagonal shape or an elliptical shape.

4B is a bottom perspective view of intermediate structure 120 and abutment 130 according to another embodiment.

4B, the projecting portion 121 of the intermediate structure 120 may have a shape that is wholly or partially divided by the cutout portion 129, and the projected portion 121 is divided into a plurality of Of the blocks 121P.

In this embodiment, as described above, a groove-shaped mounting portion 121a capable of receiving the first elastic member 125 is formed at the central position of the projection 121, and the cutout portion 129 has a groove shape And may have a width smaller than the diameter or width of the mounting portion 121a.

The cutout portion 129 may be formed to divide the protruding portion 121 into a plurality of blocks 121P arranged in the circumferential direction. That is, the cutout portion 129 may be formed such that a plurality of blocks 121P are arranged in the circumferential direction. In order to achieve this, the cutout portion 129 may intersect the center of the mounting portion 121a or may have a structure radially extended from the center of the mounting portion 121a when viewed on the transverse plane of the protruding portion 121. [

Here, the protruding portion 121 can be equally divided into blocks 121P having the same size by the cutout portion 129, and can be divided into two, three, four or five equal parts or more. For example, if the projecting portion 121 is divided into quadrants by the cutout portion 129 when the cross-sectional shape of the projecting portion 121 is circular, four blocks 121P having a sector shape when viewed from the cross- And is arranged along the circumferential direction in a state of being spaced apart by the cutout portion 129. [ As a result, in the protrusion 121, the divided blocks 121P may be deformed toward the center. In such a deformation, the interval between the blocks 121P by the cutout 129 is narrowed.

In the embodiment in which the protrusion 121 is divided into the plurality of blocks 121P as shown in FIG. 4B, the shape of the transverse section (taken along the line A-A ') of the protrusion 121 is not limited to a circular shape, , Pentagonal or hexagonal, or polygonal or elliptical. Although the protrusion 121 is entirely or partially divided into a plurality of blocks 121P, the protrusion 121 is not limited to the portion where the cutout portion 129 is formed, The cutout portion 129 may be formed to at least a part of the portion corresponding to the three vertical surfaces 122.

When the protruding portion 121 of the intermediate structure 120 has a shape divided into a plurality of blocks 121P as described above, the intermediate structure 120 may be divided into a plurality of blocks 121P, The blocks 121P of the protruding portions can be deformed into a shape of being squeezed toward the center while being guided to the bottom portion. In addition, the load can be absorbed and dispersed while the vertical movement of the intermediate structure 120 is allowed to be further allowed, and stress concentration can be mitigated.

As described above, according to the embodiment of the present invention, the clearances G1 and G2 formed between the artificial root 110 and the intermediate structure 120, the clearance G3 formed between the artificial root 110 and the abutment 130, And an elastic member 125, 126, 132 and a spring 125 'provided between the intermediate structure 120 and the abutment 130 and the artificial root 110. In this case, The unit 100 and the alveolar bone AB can be effectively protected from the load or stress concentration.

5 is a cross-sectional view showing an implant unit 100 according to another embodiment of the present invention. In the embodiment of FIG. 5, the same configuration as that of FIG. 1 has been described in detail in the foregoing, and a duplicated description will be omitted.

5, the bottom surface 112 of the elongated hole 111 in the artificial root 110 may be formed as a flat surface and may be formed as a flat surface of the intermediate structure 120 corresponding to the bottom surface 112 of the elongated hole 111 The lower end surface may also be formed as a flat surface. 1, except that the bottom surface 112 of the slotted hole 111 and the lower end surface of the intermediate structure 120 are formed as flat surfaces in one embodiment, the implant unit 100 is the same as the embodiment of FIG. 1 described above Configuration. The first clearance G1 and the second clearance G2 can be formed between the artificial root 110 and the intermediate structure 120 and the third clearance G3 can be formed between the artificial root 110 and the abutment 130. [ The first elastic member 125, the second elastic member 126 and the third elastic member 132 may be formed in the same manner as in the embodiment of FIG.

As described above, the implant unit according to the embodiment of the present invention has been described in detail, and the matters related to the embodiments described above can be used mutually interchangeably or be combined with each other as long as they are not contradictory.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of.

100: Implant unit
110: artificial root
111: Slots
112: bottom surface
112a:
113: first vertical surface
114: first fastening surface
115: First structure
116: second vertical surface
117: first inclined surface
120: intermediate structure
121:
121a:
121P: Block
122: third vertical surface
123: second fastening surface
124: second structure
125: first elastic member
125 ': spring
126: second elastic member
127: connecting face
127A: Connection plane A
127B: connecting surface B
127C: connecting surface C
128: Coupling groove
129: incision
130: abutment
131: second inclined surface
132: third elastic member
140:
150: prostheses
AB: alveolar bone
G: Gums
G1: First clearance
G2: second clearance
G3: Fourth play

Claims (39)

An artificial root attached to the alveolar bone and having a long hole;
An intermediate structure inserted into the elongated hole of the artificial root; And
And an abutment coupled to the intermediate structure,
Wherein a bottom surface of the inner surface of the elongated hole has a concave curved surface and a protrusion having a curvature corresponding to the bottom surface of the elongated hole is formed at a lower end of the intermediate structure. The method according to claim 1,
Wherein the concave curved surface has a radius of curvature varying from the outside toward the center, and the protruding portion also has a curvature changing corresponding to a varying radius of curvature of the concave curved surface. 3. The method according to claim 1 or 2,
Wherein the curvature of each of the bottom surface and the projection gradually decreases from the outside toward the center. The method according to claim 1,
Wherein an opening is provided between the inner surface of the elongated hole of the artificial tooth root and the surface of the intermediate structure. 5. The method of claim 4,
And an elastic member for absorbing and buffering the load is provided between the elongated hole of the artificial root and the intermediate structure. 5. The method of claim 4,
Wherein the clearance comprises a first clearance formed between a lower surface of the inner surface of the prosthesis and a lower surface of the intermediate structure, the first clearance comprising an opening formed between a bottom surface of the elongate hole and a protrusion of the intermediate structure, unit. 6. The method of claim 5,
And a thread is formed in the elongated hole and the intermediate structure so that the intermediate structure can be screwed into the elongated hole of the artificial tooth root and the elongated hole is formed in the second tooth formed between the thread of the elongated hole and the thread of the intermediate structure, An implant unit further comprising a clearance. The method according to claim 4 or 5,
Wherein the elastic member includes a first elastic member provided between a bottom surface of the slot and a protrusion of the intermediate structure. 8. The method of claim 7,
Wherein the bottom surface of the elongated hole includes a protrusion protruding upward and protruding upward toward the center, and the first elastic member is installed at a center position of the protrusion so as to be able to contact the upper surface of the protrusion. 9. The method of claim 8,
Wherein the bottom surface and the surface of the protrusion gradually decrease in radius of curvature from the outer portion to the center portion. 8. The method of claim 7,
Wherein the first elastic member further comprises a spring disposed therein. 5. The method of claim 4,
Wherein the elastic member includes a second elastic member provided between a side surface of the intermediate structure and an inner surface of the elongated hole. The method according to claim 1,
Wherein the elongated hole of the artificial root comprises a first structure for fastening with the intermediate structure and the intermediate structure comprises a second structure coupled to the first structure. 13. The method of claim 12,
Wherein the first structure and the second structure are threaded so that the intermediate structure can be screwed into the elongated hole of the artificial root. 14. The method of claim 13,
A second gap is formed between the first thread, which is the first structure of the long hole, and the second thread, which is the second structure of the intermediate structure, so that the intermediate structure in a state where the intermediate structure in a state of being screw- . The method according to claim 6 or 14,
Wherein the long hole diameter in the first screw thread is greater than the intermediate structure diameter at the thread end of the second screw thread so that the second clearance is formed. The method according to claim 6 or 14,
Wherein the second clearance is formed such that the width of the threaded cross section, which is the distance between adjacent bones in the first threaded portion, is greater than the width of the threaded cross section in the second threaded portion. The method according to claim 1,
Wherein the artificial tooth root has a first inclined surface of a shape whose diameter is expanded while being directed upward, and the abutment includes a second inclined surface corresponding to the first inclined surface. 18. The method of claim 17,
Wherein the first inclined surface and the second inclined surface are spaced apart from each other. 19. The method of claim 18,
And a third elastic member is provided between the first inclined surface and the second inclined surface. An artificial root attached to the alveolar bone and having a long hole;
An intermediate structure inserted into the elongated hole of the artificial root; And
And an abutment coupled to the intermediate structure,
Wherein a clearance is formed between the inner surface of the elongated hole of the artificial tooth root and the surface of the intermediate structure and an elastic member is provided between the elongated hole of the artificial tooth root and the intermediate structure for absorbing and buffering the load. 21. The method of claim 20,
Wherein the clearance comprises a first clearance formed between a lower surface of the inner surface of the prosthesis and a lower surface of the intermediate structure, the first clearance comprising an opening formed between a bottom surface of the elongate hole and a protrusion of the intermediate structure, unit. 22. The method of claim 21,
And a thread is formed in the elongated hole and the intermediate structure so that the intermediate structure can be screwed into the elongated hole of the artificial tooth root and the elongated hole is formed in the second tooth formed between the thread of the elongated hole and the thread of the intermediate structure, An implant unit further comprising a clearance. 22. The method of claim 1 or 21,
Wherein the elastic member includes a first elastic member provided between a bottom surface of the slot and a protrusion of the intermediate structure. 24. The method of claim 23,
Wherein the bottom surface of the elongated hole includes a protrusion protruding upward and protruding upward toward the center, and the first elastic member is installed at a center position of the protrusion so as to be able to contact the upper surface of the protrusion. 25. The method of claim 24,
Wherein the bottom surface and the surface of the protrusion have a shape in which the radius of curvature gradually decreases from the outer portion to the center portion. 24. The method of claim 23,
Wherein the first elastic member further comprises a spring disposed therein. 21. The method of claim 20,
Wherein the elastic member includes a second elastic member provided between a side surface of the intermediate structure and an inner surface of the elongated hole. 21. The method of claim 20,
Wherein the elongated hole of the artificial root comprises a first structure for fastening with the intermediate structure and the intermediate structure comprises a second structure coupled to the first structure. 29. The method of claim 28,
Wherein the first structure and the second structure are threaded so that the intermediate structure can be screwed into the elongated hole of the artificial root. 30. The method of claim 29,
A second gap is formed between the first thread, which is the first structure of the long hole, and the second thread, which is the second structure of the intermediate structure, so that the intermediate structure in a state where the intermediate structure in a state of being screw- . 31. The method according to claim 22 or 30,
Wherein the long hole diameter in the first screw thread is greater than the intermediate structure diameter at the thread end of the second screw thread so that the second clearance is formed. 31. The method according to claim 22 or 30,
Wherein the second clearance is formed such that the width of the threaded cross section, which is the distance between adjacent bones in the first threaded portion, is greater than the width of the threaded cross section in the second threaded portion. 21. The method of claim 20,
Wherein the artificial tooth root has a first inclined surface of a shape whose diameter is expanded while being directed upward, and the abutment includes a second inclined surface corresponding to the first inclined surface. 34. The method of claim 33,
Wherein the first inclined surface and the second inclined surface are spaced apart from each other. 35. The method of claim 34,
And a third elastic member is provided between the first inclined surface and the second inclined surface. 21. The method of claim 20,
Wherein a bottom surface of the lower end of the inner surface of the artificial root has a predetermined curvature and a protrusion having a curvature corresponding to a bottom surface of the slot is formed at a lower end of the intermediate structure. 37. The method of claim 36,
Wherein the bottom surface has a different radius of curvature for each of the divided portions on the end surface of the artificial tooth root, and the surface of the protruded portion has different curvatures for each of the divided portions on the end surface of the intermediate structure. 37. The method of claim 36 or 37,
Wherein the bottom surface and the surface of the protrusion have a shape in which the radius of curvature gradually decreases from the outer portion to the center portion.

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