KR101642743B1 - Hybrid type dental implant structure - Google Patents

Abstract

The present invention relates to a hybrid type dental implant structure having an advantage of two-mold type and integrated type dental implant structures. The dental implant structure according to the present invention includes a fixture fixed to an alveolar bone and an abutment coupled to the fixture and bonded thereon with an artificial tooth, and forms an artificial dental root. The fixture includes: a lower part partially or entirely formed at an outer surface thereof with a screw screw-coupled to the alveolar bone, and fixed to the alveolar bone; and an upper part coupled to the abutment. The upper and lower parts of the fixture have a shape extending along a rotation axis of the screw. At least one protrusion, protruding from the outer surface of the upper part of the fixture to the outside in the direction of a diameter of the fixture, is formed at an upper part of the fixture. An outer surface of the abutment is bonded thereto with the artificial tooth, and faces and contacts a gingiva. A through-hole is formed inside the abutment, in which the lower part of the fixture passes through the through-hole, and the through-hole is formed in a shape complementing a shape of the upper part of the fixture so that the upper part of the fixture is mounted in a contacting state. An insert groove which a protrusion of the fixture is inserted into and interlocked with is formed from the through-hole toward the outside of the abutment, such that a side surface and a bottom surface of the protrusion are contacted to a side surface and a bottom surface of the insert groove to be supported, respectively, thereby preventing the abutment from being separated from the fixture and rotating with respect to the fixture.

Description

[0001] HYBRID TYPE DENTAL IMPLANT STRUCTURE [0002]

[0001] The present invention relates to a dental implant structure to be used for implantation of an artificial tooth, and more particularly to a dental implant structure which is placed in an alveolar bone tissue and functions as a root and to which an artificial tooth is attached.

The dental implant structure is placed in the alveolar bone tissue to form an artificial root when the tooth is lost or lost, and the artificial tooth is attached. When the tooth implant structure is inserted into the alveolar bone tissue and adheres to the surrounding alveolar bone tissue, do.

The dental implant structure includes a fixture that is inserted into the alveolar bone and adhered and fixed to the alveolar bone tissue, and an element called an abutment to which an artificial tooth is attached on the upper side of the fixture.

The dental implant structure is a two-body type in which a fixture is fixed to an alveolar bone and then a screw is used to screw the fixture and the abutment portion together, and an integral structure in which a fixture and an abutment are integrally formed, (one body type).

The dental implant structure of the Ybone type has a hole formed with a female screw in the longitudinal direction at the center of the fixture, and a hole penetrating from the upper end to the lower end is formed in the abutment, a step is formed in the middle of the hole, The head of the screw is supported on the step, and the male screw of the screw is engaged with the female screw of the hole formed in the fixture, so that the abutment is fixed to the fixture.

An example of a dental implant structure according to the prior art is shown in Fig.

The tooth implant structure 100 shown in Fig. 1 has a cylindrical fixture 110 having a thread 111 formed on the surface thereof and placed in the alveolar bone 1 and has a smaller diameter from the upper end of the fixture 110 And a fastening hole 113 is formed in the center of the mounting surface 112 with a female screw 114 for fastening the fastening screw 130 have.

The abutment 120 includes a cylindrical lower portion 122 having a smaller diameter toward the lower end and coming into contact with the mounting surface 112 of the fixture and a cylindrical upper portion 121 having a smaller diameter toward the upper end, The fixing member 122 is inserted into the mounting surface 122 of the fixture 110 from its lower end and a part thereof is placed on the mounting surface 112.

The lower portion of the abutment hole 123 from the middle to the lower end of the fastening hole 123 is smaller in diameter than the upper portion of the abutment hole 123 so that the fastening hole 123 A step 124 is formed between the upper portion and the lower portion.

The lower portion 122 of the abutment 120 is abutted against the mounting surface 112 of the fixture 110 after the fixture 110 is placed in the alveolar bone 10 and the lower portion 122 of the abutment 120 And the male screw 131 formed at the lower portion of the fastening screw 130 is engaged with the female screw 114 formed in the fastening hole 113 of the fixture 110 and the fastening screw 130 is supported by the step 124 formed in the fastening hole 123 of the abutment 120.

In this state, the crown 140, which is an artificial tooth, is bonded to the upper portion 121 of the abutment 120 with cement, thereby completing the implantation of the artificial tooth. The remaining portion of the upper portion 121 of the abutment 120 that is not inserted into the mounting surface 112 of the fixture 110 is in contact with the gingiva 2.

In the prior art dental implant structure having the above-described structure, a fastening hole is formed at the center of the fixture to be placed on the alveolar bone, and a fastening hole is formed through the abutment, and the screw is inserted through the fastening hole, And is coupled to the female screw of the fastening hole formed in the main body.

However, prior art dental implant structures having such a configuration have some serious problems.

The crown placed at the uppermost position in the tooth implant structure is subjected to occlusal load acting in the process of chewing food or the like. This occlusal load is applied to the part where the fixture and the screw are screwed and the abutment is abutted against the fixture through the abutment where the crown is fixed.

The occlusal load acting on the crown not only acts perpendicularly to the center of the crown but also acts in an inclined direction with respect to the vertical direction and is applied to a position deviating from the center of the crown, And acts as a horizontal load on the threaded portion of the screw.

Herein, the term 'vertical direction' refers to a direction in which the tooth implant structure is placed, that is, a fixture and a circumferential axis direction formed in a substantially columnar shape, and a 'horizontal direction' refers to a direction parallel to a plane perpendicular to the vertical direction it means.

Due to the occlusal load acting on the crown, the load acting on the screw connection part of the fixture and the abutment part leads to the unlocking of the screw connection, and in particular, the load due to the horizontal component of the occlusal load further promotes the untwelling of the screw connection. The screw connection shows a strong bearing capacity for the load in the direction generally perpendicular to the thread surface, but it is vulnerable to the load in the horizontal direction on the thread surface.

The occlusal load generated by the use of the teeth continuously acts on the screw to cause the screw to loosen, and in severe cases, the screw of the screw or fixture is also broken.

Therefore, even after successful fixation and adhesion of the alveolar bone to the alveolar bone and the successful implantation procedure, it is necessary to remove the crown and re-tighten the screw due to the loosening of the screw that fixes the abutment to the fixture.

When the screw is loosened, a clearance is formed between the abutment and the fixture, and germs multiply in the gap, resulting in gingivitis and oral odor. This causes the alveolar bone to become inflamed and alveolar bone tissue is absorbed It also causes problems.

In particular, when the screw is subjected to a strong occlusal load according to the chewing habit, or when the screws are left untightened for a long period of time, the screw is subjected to a strong load or is continuously shaken and the screw of the screw or fixture is broken and the implant treatment including the fixture is re- It occurs frequently.

In addition, in the prior art dental implant structure, since the mounting surface is formed on the upper portion of the fixture from the upper side to the lower side of the fixture, the thickness of the outer wall on the upper portion of the fixture becomes very thin. Therefore, there is a problem that the occlusal load acting on the crown acts on the outer wall of the fixture or the outer periphery of the abutment, so that the outer wall of the fixture or the outer wall of the abutment is broken.

Further, since the fastening hole into which the screw is inserted and fastened is formed on the inside of the fixture and formed through the center of the abutment, in order to reduce the stress per unit area acting on the screw or its thread according to the occlusal load, The thickness of the outer wall of the fixture and the periphery becomes thinner, and the above-described problem of fracture of the outer wall becomes more serious.

FIG. 2 shows an integrated dental implant structure 200 among the dental implant structures according to the prior art.

The integrated dental implant structure 200 includes a fixture 210 having a male screw 211 formed on its surface and inserted and fixed to the alveolar bone and a fixture 210 formed on the fixture 210 and having the crown 240 attached thereto by cement And a connection unit 230 connecting the fixture 210 and the head 220 to each other. The fixture 210 is formed in a columnar shape as a whole, and a male screw 211 is formed on the surface thereof from the upper end to the lower end.

The fixture 210 is fixed to the alveolar bone 1 and the abutment 220 is protruded to the upper portion of the gum 2 so that the crown 240 is adhered and fixed to the abutment 220 after the attachment of the fixture 210 is completed .

Since the fixture and the abutment are formed integrally with each other in the integrated dental implant structure having such a configuration, there is no problem of clearance between the abutment and fixture due to the occlusal load acting on the crown after the abutment and the abutment of the abutment, So that a fracture phenomenon caused by the fracture does not occur.

However, the dental implant structure of the Yibon type has various types and sizes of abutment which are fixed to the fixture by considering the size and shape of the crown to be attached and the gap between the peripheral teeth or the mating teeth after the fixture is placed in the alveolar bone However, since the monolithic dental implant structure forms the monolithic abutment with the fixture, it is necessary to select the shape and size of the abutment in consideration of the size and shape of the crown to be attached to the alveolar bone, There is a problem in that it is not possible to change the shape or size of the abutment, or the position of the abutment with respect to the fixture in consideration of the occlusal clearance between the surrounding teeth or the abutment after the abutment.

Furthermore, since the integral dental implant structure must be formed integrally with the fixture in advance, it is difficult to provide an abutment having various shapes, sizes, and positional relations with respect to one fixture.

On the other hand, in the case of implants that substitute for molars, since the occlusal load acting on the molars is large, the load acting on the threaded portion between the abutment and fixture is very large in the dental implant structure, Is high. In order to prevent the occurrence of such a problem, the shape and size of the abutment piece to be selected are very limited when an integral dental implant structure is used. Especially, when attaching a large molar crown to a small abutment abutment, It is difficult to adjust the shape, size or position of the abutment after consideration of the gap between the adjacent teeth or the abutment, once the tooth implant structure is placed.

The present invention has been made in view of the above problems of the monolithic implant structure according to the prior art and adopts a structure of a dental implant structure capable of combining abutments having various shapes and sizes with respect to one fixture, To provide a dental implant structure of a structure that does not cause the union of the fixture and the abutment to be unraveled as in the case of the dental implant structure according to the present invention and does not cause the fixture or the abruption of the fracture in the fixture- will be.

The present inventors considered the following several points in solving the above-mentioned problems.

Firstly, in the prior art dental implant structures of the dental type, screw fixation of the fixture and the abutment is highly likely to cause fixture and abutment loosening or gap at the screw connection site.

Therefore, the present invention does not have a fastening structure by a screw, but adopts a diaphragm-type configuration in which an abutment and a fixture are separately formed, but the abutment and fixture are combined with each other without screwing to form an integral- A hybrid dental implant structure is considered.

Secondly, the prior art dental implant structures of the dental type are formed at the lower part of the tooth implant structure in the fixture and abutment joints. In this case, the distance between the crown and the joint is large and the occlusal load acting on the crown The stress acting on the bonding site is increased.

Therefore, in the present invention, a structure in which the abutment portion and the fixture join portion is formed at a distance from the upper end of the crown, that is, above the tooth implant structure.

Third, most dental implants with integral dental implants, as well as integral dental implants, are constrained to adjust the shape and position of the denture according to the size and position of the crown to be attached due to the fixture and abutment fastening structure .

Accordingly, in the present invention, a dental implant structure in which the configuration for combining the fixture and the abutment is not limited to the shape and position of the abutment is considered.

As a result of such considerations, the inventor of the present invention has created the present invention having the following constitution.

A tooth implant structure according to the present invention includes a fixture fixed to an alveolar bone and an abutment coupled to the fixture and to which an artificial tooth is attached,

Wherein the fixture includes a screw that is screwed to the alveolar bone and formed on a part or the whole of the outer surface of the alveolar bone to have a lower portion fixed to the alveolar bone and an upper portion to which the alveolar bone is engaged, Lt; RTI ID = 0.0 > a < / RTI >

Wherein at least one projection projecting radially outward from an outer surface of the fixture is formed on the fixture,

Wherein an outer surface of the abutment is formed with a surface to which an artificial tooth is attached and a contact surface of the gingiva and a lower portion of the fixture passes through the inside of the abutment and is formed in a shape complementary to the shape of the upper portion of the fixture, Through holes are formed,

Wherein the insertion groove has a shape complementary to the projection toward the outside of the abutment hole from the through hole so that the projection is engaged with the insertion groove such that the side surface and the lower surface of the projection abut on the side surface and the lower surface of the insertion groove, The departure from the fixture and the rotation about the fixture are prevented.

According to such a configuration, the fixture and the abutment are engaged with the abutment of the fixture in the insertion groove of the abutment when the upper part of the fixture is inserted into the abutment groove of the abutment, so that the abutment and the fixture are engaged. After abutment of the abutment, . As described above, the abutment and the fixture are engaged with each other with the shape complementary to each other without depending on the screw, so that the joints of the abutment and fixture are made firm and the joint is not loosened or broken by the action of the occlusal load.

In addition, the fixture-to-abutment joint is formed inside the abutment and the outer surface of the abutment where the crowns are attached is not affected by the connection with the fixture, so the shape and size of the crown to be attached or the occlusal gap The outer shape and size of the abutment can be freely selected.

Next, in the prior art dental implant structure, a large stress acts on the fixture and abutment joints due to the occlusal load acting on the top surface of the crown, while in the embodiment of the present invention, The stress acting on joints of the zone is very small.

In the prior art dental implant structure, the fixture and the abutment joint are formed below the crown attaching portion, but in the present invention, since the abutment and fixture are engaged at the same height as the crown attaching portion, The distance between the top surface and the bonding site is very short. Therefore, the stress due to the occlusal load acting on the fixture and abutment joint is minimized.

As described above, according to the configuration of the dental implant structure of the present invention, the problems of the prior art dental implant structures and the integrated dental implant structures are solved, and a hybrid type dental implant structure that takes advantage of both is obtained.

In one specific embodiment of the present invention, a plurality of the projections are formed on the upper surface of the fixture, and the projections are equally spaced around the upper surface of the fixture.

As described above, according to the present invention, by arranging the projections in plural, the stress generated between the projections and the insertion grooves into which the projections are inserted can be dispersed, and the effect that the stresses are dispersed evenly by arranging the projections at equal intervals can be obtained.

In yet another embodiment of the present invention, the insertion groove may extend from the surface of the abutment groove to the abutment outer surface.

According to such a configuration, even when the size of the crown to be attached to the abutment is small, it is possible to attach the small-sized crown by reducing the size of the outer contour of the abutment without reducing the diameter of the upper and lower through holes of the fixture.

In such a configuration, the projection of the fixture extends to the outer surface of the abutment through the abutment insertion groove, so that the outer surface of the projection forms a continuous surface with the abutment outer surface.

Further, as a further embodiment of the present invention, the abutment may have a length whose upper surface is disposed at a position extending upward from the upper surface of the fixture.

According to this configuration, when the crown to be attached to the abutment has a shape elongated in consideration of the gap between the abutment and the abutment, the abutment length can be formed to be long according to the crown.

In this case, it is not necessary that the upper part of the fixture engaging with the abutment is elongated in accordance with the length of the abutment, and the abutment having a long length can be engaged with the fixture having the same size.

As described above, according to the present invention, even when the crown to be attached to the abutment is of a narrow width or a long length, it is possible to change the contour size of the contour according to the size of the crown, The same fixture can be used without changing the setting.

Therefore, in view of the dentist performing the procedure, the position and diameter of the fixture should be selected considering only the state of the alveolar bone tissue to be implanted in the dental implant structure, and the size and position of the crown to be attached thereto Therefore, the selection width at the time of the procedure can be greatly widened, and the dental implant procedure optimal for the condition of the patient can be performed.

In particular, even if the position and size of the crown to be attached to the abutment are not appropriate even after the abutment and fixture are selected, if the fixture is before the fixture is attached, the fixture and the abutment are separated from the alveolar bone, Can be selected and combined with the same fixture.

FIG. 1 is a vertical sectional view showing a state in which a dental implant structure of a Ybone type according to the prior art is placed in an alveolar bone,
FIG. 2 is a longitudinal sectional view showing a state in which a single-type dental implant structure according to the prior art is placed in the alveolar bone,
FIG. 3 is a perspective view showing a state before the fixture and the abutment are joined in the dental implant structure according to the first embodiment of the present invention, and FIG.
FIG. 4 is a perspective view showing a partial cross-section of a state where the tooth implant structure of the first embodiment shown in FIG. 3 is placed,
5 is a view showing a state in which various types of dental implant structures according to the present invention are placed,
6 to 8 (A) are vertical cross-sectional views showing a state in which a tooth implant structure of an embodiment having a configuration different from that of the embodiment shown in Fig. 1 is placed in the embodiment of the tooth implant structure shown in Fig. 5, 8 (b) is a perspective view showing the abutment in the tooth implant structure of the embodiment shown in FIG. 8 (a).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure and operation of a dental implant structure according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the construction and operation of the dental implant structure according to the first embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG.

3, the fixture 10 and the abutment 30 constituting the tooth implant structure according to the first embodiment are shown without being coupled to each other.

The fixture 10 comprises a lower portion 11 fixed to the alveolar bone 1 and an upper portion 15 coupled with the abutment 30.

The fixture 10 has a columnar shape as a whole from the upper portion 15 to the lower portion 11 and the surface of the lower portion 11 has a thread 12 for engaging the alveolar bone. In this embodiment, the thread 12 is shown as being formed on the entire surface of the lower portion 11, but this thread 12 may be formed only on a part of the surface of the lower portion 11.

4 shows a state in which the dental implant structure according to the present embodiment is placed in the alveolar bone 1. The lower part 11 is entirely placed in the alveolar bone 1 and the thread 12 is inserted into the alveolar bone 1, (1) and allows adhesion with the alveolar bone tissue.

Although not shown in the drawing, a part of the thread 12 may be cut on a part of the surface of the lower portion 11 of the fixture to form a tapping edge. This tapping edge acts to help form a female screw in the alveolar bone 1 when the fixture 10 is placed in the alveolar bone 1 after forming the hole for placement of the fixture 10 in the alveolar bone 1.

The fixture upper portion 15 is formed with a circumference having the same diameter as the diameter of the ridgeline of the thread 12 of the lower portion 11. It is not necessarily required that the diameter of the fixture upper portion 15 is equal to the diameter of the ridge of the thread 12 And may be configured to have a larger diameter.

On the upper end side of the fixture upper portion 15, two projections 16 are protruded from the outer surface toward the radially outer side. In this embodiment, the projections 16 are formed to have side surfaces extending parallel to each other and an arc-shaped outer surface concentric with the fixture upper portion 15 and formed symmetrically with respect to the center of the fixture upper portion 15 However, it is not necessarily required to have such a shape and arrangement, and there is no restriction on the shape if it has a sufficient size to withstand the load acting in the state of engagement with the abutment 30. However, it is preferable that the protrusions are formed symmetrically with respect to each other so that the protrusions 16 can be engaged with any of the insertion grooves 32 of the abutment 30.

The abutment 30 is formed in a columnar shape as a whole, and the diameter at the lower end is reduced, and the side surface and the lower end surface form a continuous surface, and the upper surface forms a flat surface.

The side surface and the upper surface of the outer surface of the abutment 30 form a surface to which a crown (not shown) is attached, and a lower surface, a lower surface and a side surface of the abutment surface form a surface contacting the gum. Accordingly, the surfaces of the abutment 30 can be formed in conformity with the crown to be attached, and are not limited to the shape of this embodiment.

A through hole 31 through which the lower portion 11 of the fixture 10 penetrates and into which the upper portion 15 is inserted is formed in the inner side of the abutment 30, Two insertion grooves 32 into which the protrusions 16 of the respective protrusions 15 are inserted are formed.

The through hole 31 is formed in a columnar shape which is complementary to the fixture upper portion 15 so that the fixture upper portion 15 can be rotated inside thereof so that a gap is not generated between the fixture upper portion 15 and the insert groove 32 are formed in a shape complementary to the projections 16 so that the projections 16 of the fixture 10 are inserted and engaged with each other without any gap.

The fixture 10 and the abutment 30 thus formed are engaged by inserting the fixture 10 into the through hole 31 of the abutment 30 from the lower portion 11 in the direction of arrow A in Fig.

A process of combining the fixture 10 and the abutment 30 while fixing the fixture 10 to the alveolar bone 1 will be described with reference to FIG.

In the implant treatment, the gingiva 2 on the alveolar bone 2 to be inserted into the fixture 10 is cut and a hole is formed in the alveolar bone 1. The abutment 30 is placed on the incision of the gum 2 and the fixture 10 is rotated through the lower portion 11 of the fixture with the through hole 31 of the abutment 30 to rotate the fixture 10 12) are fixed to the alveolar bone (1).

The fixture 10 is inserted while forming a thread on the alveolar bone 1 and the fixture upper portion 15 is inserted into the through hole 31 of the abutment 30. When the fixture 10 is further inserted, the projection 16 of the fixture is brought into contact with the upper surface of the abutment 30, and at this time, the fixture 16 is inserted into the abutment insertion groove 32, 10).

When the fixture 10 is rotated with the projection 16 of the fixture inserted in the abutment insertion groove 32, the fixture 10 and the abutment 30 are rotated together to move the fixture 10 against the alveolar bone 1 The projection 16 of the fixture is completely inserted into the abutment insertion groove 32 so that the bottom surface of the projection 16 abuts against the bottom surface of the insertion groove 32 do. This state is shown in Fig.

Thus, at the same time as fixing the fixture 10 to the alveolar bone 1, the combination of the fixture 10 and the abutment 30 is completed at the same time.

Since the fixture 16 of the fixture is engaged with the abutment insertion groove 32 in the state where the fixation is completed, the abutment 30 can not rotate with respect to the fixture 10 nor deviate upward.

Then, the crown can be attached to the abutment 30 after the fixture 10 is attached to the alveolar bone 1, and the dental implant placement is completed.

The crown (not shown) in the embodiment of the present invention is similar to the crown 140 attached to the abutment upper portion 120 in the prior art dental implant structure shown in Fig. 1, And is attached to the side surface by cement.

The advantages of the dental implant structure of the present embodiment can be easily understood by comparing the prior art dental implant structure shown in Fig. 1 with the dental implant structure of this embodiment.

Since the lower portion 122 of the abutment 120 is mounted on the mounting surface 112 of the fixture in the prior art tooth implant structure shown in FIG. 1, The fixture 10 does not have a structure in which a thin wall is formed in the fixture 10 for coupling with the abutment 30, so there is no fear of fracture.

In addition, in the prior art dental implant structure, since the fixture 110 and the abutment 120 are combined with the screw 130, an additional component called the screw 130 is required. In addition, This inevitably occurs.

In the embodiment of the present invention, the position of the engagement portion of the abutment 30 and the fixture 10, that is, the portion where the projection 16 and the insertion groove 32 engage with each other is formed very close to the upper surface of the crown, The distance in the vertical direction from the top surface of the engaging portion to the engaging portion becomes very short.

Compared to the prior art tooth implant structure 100, which is very long in distance from the top face of the crown 140 to the screwing site of the fixture 110, the fixture and the region Note: The stress acting on the joint is very small.

FIG. 5 is a view showing a state in which a dental implant structure according to various embodiments of the present invention is performed. The figure shows that the crown 3 is attached to the implant structure having the fixture 10 and the abutment 30 according to the first embodiment. In another embodiment, the occlusal gap with the abutment is large and the length is long An implant structure 10, 40 with a crown 4 attached thereto, an implant structure 10, 50 with a crown 5 having a very wide width and an implant structure 10, 60 with a narrow crown 6 attached thereto ) Are shown.

In these embodiments, the same fixture 10 is used, and the same fixture 10 is combined with abutments 30, 40, 50, 60 having different sizes or structures from each other.

6 shows a longitudinal sectional view in a state where the implant structures 10, 40 with the crown 4 having a long occlusion gap with the opposing teeth are placed.

Referring to FIG. 6, the fixture 10 is the same as that of the first embodiment, and the abutment 40 has the same diameter as the first embodiment but has a longer overall length.

The upper end face of the fixture 10 is disposed below the upper face of the abutment 40 in a state where the fixture 10 is inserted into the abutment 50 and fixed to the alveolar bone 1. [ However, unlike the present embodiment, the upper end of the fixture 10 and the upper end of the abutment 40 may be flush with each other by providing a longer length of the fixture 15.

FIG. 7 shows a longitudinal sectional view of the embodiment of FIG. 5 in which the implant structures 10, 50 with the crown 5 having a very wide width are placed.

Referring to Fig. 7, the fixture 10 is the same as that of the first embodiment, and the abutment 50 includes through holes and insertion grooves of the same size and shape as those of the abutment 30 of the first embodiment And the outer surface of the abutment 50 is enlarged so that the outer surface of the abutment 50 is expanded. In Fig. 7, the outer surface of the abutment 10 of the first embodiment is indicated by a dotted line.

8 (a) is a vertical cross-sectional view in a state in which the implant structures 10 and 60 with the narrow crown 6 are attached, and the perspective view of the abutment 60 is shown in Fig. 8 (b) Respectively.

In this embodiment, the fixture 10 having the same size and configuration as those of the first embodiment is used without using a fixture having a small diameter for attaching the narrow crown 6, and the size of the crown 6 The outer diameter of the abutment 60 is reduced compared to the abutment 10 of the first embodiment.

The insertion groove 62 extends to the outer surface of the abutment 60 while maintaining the same diameter and size of the through hole 61 and the insertion groove 62 despite the decrease in the diameter of the abutment 60, The outer surface of the projection 16 is continuous with the outer surface of the abutment 60 while the projection 10 is inserted into the abutment 60 and the projection 16 is engaged with the insertion groove 62. [

Although the abutment to which the fixture is inserted is formed in a columnar shape and the through hole is shown as being disposed in the geometric center of the abutment in the accompanying drawings and the foregoing description, it is not necessary that the abutment is formed in a columnar shape, The positions of the through holes do not have to be arranged in the geometric center of the abutment and can be variously determined to allow the center of the fixture's placing position and the geometric center of the crown to be discordant.

Thus, according to the present invention, since the abutments having various sizes and configurations are combined with the fixture having one size and configuration, the dentist who performs the implant treatment can not only measure the alveolar bone thickness, It is possible to select a fixture having an appropriate diameter and to select one of various abutments considering the positional relationship between the width and length of the crown to be attached and the center of the fixture.

Although the above embodiments and drawings have not been described and shown in the drawings in which the tool for rotating the fixture 10 is fixed to the fixture 10 when the fixture 10 is fixed to the alveolar bone 1, The upper surface of the upper portion 15 may be formed with a groove into which the tool is engaged or a surface where the fastening tool is engaged with the outer surface of the fixture upper portion 15 and the abutment portions 30, 40, 50 and 60, Various known techniques for fixing the fixture to the alveolar bone can be applied.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, 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 similar arrangements included within the spirit and scope of the appended claims. It is to be understood that the invention is not limited to the disclosed embodiments.

10: Fixture 16: projection
30, 40, 50, 60: abutment

Claims (4)

A tooth implant structure for forming an artificial root including a fixture fixed to an alveolar bone and an abutment coupled to the fixture and to which an artificial tooth is attached,
Wherein the fixture includes a screw that is screwed to the alveolar bone and formed on a part or the whole of the outer surface of the alveolar bone to have a lower portion fixed to the alveolar bone and an upper portion to which the alveolar bone is engaged, Lt; RTI ID = 0.0 > a < / RTI >
Wherein at least one projection projecting radially outward from an outer surface of the fixture is formed on the fixture,
Wherein an outer surface of the abutment is formed with a surface to which an artificial tooth is attached and a contact surface of the gingiva and a lower portion of the fixture passes through the inside of the abutment and is formed in a shape complementary to the shape of the upper portion of the fixture, Through holes are formed,
Wherein the insertion groove has a shape complementary to the projection toward the outside of the abutment hole from the through hole so that the projection is engaged with the insertion groove such that the side surface and the lower surface of the projection abut on the side surface and the lower surface of the insertion groove, Wherein a departure from the fixture is prevented and rotation about the fixture is prevented. The method according to claim 1,
Wherein a plurality of the protrusions are formed on an upper surface of the fixture, and the protrusions are equally spaced around the upper surface of the fixture. The method according to claim 1,
Wherein the insertion groove extends from a surface of the abutment groove to the abutment outer surface. The method according to claim 1,
Wherein the abutment has a length such that its upper surface is disposed at a position extending upwardly from an upper surface of the fixture.

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