KR102198192B1 - Fixture for dental implant system - Google Patents

Abstract

A dental implant fixture related to the present invention includes: a body portion having a fastening hole for fastening an abutment formed therein; A first section including a screw thread formed on a main surface of the body portion, the screw thread being formed at a portion of the body portion starting to enter the perforated hole formed in the jawbone, and including a shape for self-tapping; A second section that enters after the first section and has a diameter smaller than that of the first section to reduce fastening resistance; And a third section that enters after the second section and is formed to increase a fastening force with the jawbone, wherein the first section is thicker than a thread formed in the second section and the third section. Includes a tapping thread with a thickness.

Description

Dental implant fixture {FIXTURE FOR DENTAL IMPLANT SYSTEM}

The present invention relates to a fixture having a self-tapping function of a dental implant system.

In a dental implant, in a broad sense, it refers to a treatment that makes the tooth from the root to the head look like a natural tooth. That is, instead of the lost tooth, a fixture made of titanium is inserted directly into the alveolar bone through surgery, and then an artificial tooth, which is a crown, is fixed on the upper part of the tooth so that it can be chewed like a natural tooth. .

In terms of construction, the implant system is a fixture (artificial tooth root) that is planted in the alveolar bone and plays the role of the root of the tooth, a crown that is artificially made to harmonize with the adjacent teeth, and completes the upper part of the tooth. It has an abutment (abutment) that connects the tooth root and the prosthesis.

Fixtures are fixed to the jawbone, and when titanium, known to be osseointergration, is processed or molded into a screw shape and inserted into a hole previously formed in the jawbone, the jawbone adheres to the fixture and fills the empty space. It serves to securely fix the jawbone.

Fixing the fixture to the jawbone may affect the quality of the procedure for future prostheses, so it is important to securely fix it in the desired direction. It is common to design a fixture to have a self-tapping function to increase the fastening force with the jawbone. However, on the contrary, when the self-tapping function is emphasized, the fastening resistance may increase, making the procedure difficult.

* Related prior literature

Korean Patent Registration No. 10-1815667 (2018. 01. 05. Announcement)

Republic of Korea Patent Publication No. 1997-7005948 (1997. 11. 03. Announcement)

It is an object of the present invention to provide a dental implant fixture capable of reducing fastening resistance while retaining a self-tapping function and maximizing fastening force with the jawbone.

A dental implant fixture related to the present invention includes: a body portion having a fastening hole for fastening an abutment formed therein; A first section including a screw thread formed on a main surface of the body portion, the screw thread being formed at a portion of the body portion starting to enter the perforated hole formed in the jawbone, and including a shape for self-tapping; A second section that enters after the first section and has a diameter smaller than that of the first section to reduce fastening resistance; And a third section that enters after the second section and is formed to increase a fastening force with the jawbone, wherein the first section is thicker than a thread formed in the second section and the third section. Includes a tapping thread with a thickness.

As an example related to the present invention, the tapping thread may include: a first tapping thread protruding from the body portion and having a thickness thicker than a thread formed in the second section and the third section; And a second tapping thread protruding from the first tapping thread and having a thickness thinner than that of a thread formed in the second section and the third section.

As an example related to the present invention, the tapping thread may be formed at a position of a second or later thread in the first section.

As an example related to the present invention, the tapping thread may have a length of 360 degrees (one turn) to 720 degrees (two turns) along the circumferential direction of the body.

As an example related to the present invention, the first section is formed at a previous position of the tapping thread, and a third tapping thread having a thickness thinner than that of a thread formed on the second section and the third section is further provided. Can include.

As an example related to the present invention, the second tapping screw thread may have a plurality of first tapping grooves arranged in a circumferential direction.

As an example related to the present invention, the distance between the axis of the body portion and the vertex of the thread of the second section may be formed to start smaller than the distance between the axis and the tapping thread and increase toward the third section.

As an example related to the present invention, a distance between the axial line and the vertex of the thread of the third section may be larger than the distance between the axial line and the tapping thread.

As an example related to the present invention, at least one second tapping groove disposed in a circumferential direction may be formed in the thread of the third section.

As an example related to the present invention, the dental implant fixture is formed at least partially in the first section and the second section, and a cutout on the thread and the body to accommodate the chip of the jawbone It may further include a third tapping groove formed in the shape.

According to the dental implant fixture related to the present invention, as a configuration having a first section including a relatively thick tapping thread, a second section to reduce fastening resistance, and a third section to increase fastening force with the jawbone, It is possible to increase the fastening property along with the tapping function, and has excellent fastening force.

According to an example related to the present invention, the tapping thread includes a thick first tapping thread and a thin second tapping thread protruding from the first tapping thread, thereby enabling tapping in the radial direction and tapping in the axial direction. It is possible to reduce the increase in tightening torque by

1 is a side view of a dental implant fixture 100 according to a first embodiment related to the present invention
Figure 2 is a longitudinal cross-sectional view of the dental implant fixture 100 of Figure 1
3 and 4 are views showing fastening to the jawbone using the dental implant fixture 100 of FIG. 1
5 is a side view of a dental implant fixture 200 according to a second embodiment related to the present invention
6 is a side view of a dental implant fixture 300 according to a third embodiment related to the present invention
7 is a partial cross-sectional view showing the trunk portion 301 and the tapping thread 312 of the dental implant fixture 300 of FIG. 6

Hereinafter, a dental implant fixture related to the present invention will be described in detail with reference to the accompanying drawings.

1 is a side view of a dental implant fixture 100 according to a first embodiment related to the present invention, and FIG. 2 is a longitudinal sectional view of the dental implant fixture 100 of FIG. 1.

As shown in these drawings, the dental implant fixture 100 has a body portion 101 having a fastening hole 104 for fastening an abutment (not shown) formed therein, and a body portion 101 It has a thread 102 formed on the main surface of the. The body portion 101 and the thread 102 may be formed of a material having osseointergration characteristics, including titanium and a titanium alloy. Surface treatment may be applied to the thread 102 to promote bone adhesion. Such surface treatment is a method of forming fine irregularities by hitting sand particles absorbed by metal using strong pressure (RBM; Resorbable blast media), and forming finer crater heights inside the irregularities by treating the acid solution on the RBM surface. Method (SA; Sandblasted and acid etched), method of treating the acid solution after striking aluminum oxide particles that cannot be absorbed by metal with strong pressure (SLA; Sandblasted, Large-grit acid etched), bone matrix on the surface of the fixture There is a method of coating the component hydroxyapatite (HA; Hydroxyapatite coating).

In connection with the present invention, the threads 102 formed on the outer periphery of the body 101 can be divided into three parts. These are the first section 110, the second section 120 and the third section 130. The first section 110 is formed in a portion of the trunk portion 101 that starts to enter the perforation hole formed in the jawbone and includes a shape for self tapping. The second section 120 enters after the first section 110 and has a smaller diameter than the first section 110 so as to reduce fastening resistance. The third section 130 enters the perforation hole of the jawbone after the second section 120 and is formed to increase the fastening force with the jawbone. In order to explain the thread 102 by dividing each section, the threads formed in the first section 110 are the first threads 111 and 112, and the threads formed in the second section 120 are the second threads 121 ), the thread formed in the third section 130 will be referred to as a third thread 131.

The first section 110 includes a tapping thread 112 having a thickness greater than that of the second thread 121 formed in the second section 120 and the third thread 131 formed in the third section 130. Include. Specifically, as shown in the enlarged portion of FIG. 1, the thickness t1 of the tapping screw thread 112 is thicker than the thickness t3 of the second screw thread 121 and the third screw thread 131, It is responsible for the tapping function of the second screw thread 121 and the third screw thread 131.

The tapping thread 112 may include a first tapping thread 112a and a second tapping thread 112b from the body portion 101 side. The second tapping thread 112b has a shape protruding in the radial direction from the vertex of the first tapping thread 112a. The first tapping thread 112a has a thickness thicker than the second thread 121 and the three thread 102, and the second tapping thread 112b is thinner than the second thread 121 and the third thread 131 Can have Accordingly, the second tapping thread 112b induces tapping in the direction of digging into the bone tissue thinly in the radial direction, and the first tapping thread 112a induces tapping in the direction of expanding the bone tissue in the axial direction. do.

In terms of length, the tapping thread 112 may have a length of 360 degrees (one turn) to 720 degrees (two turns) along the circumferential direction of the body portion 101. If the tapping thread 112 is too short, less than one rotation, the tapping effect decreases, and if it is more than two rotations, the tightening torque increases, which may make the procedure difficult.

In terms of position, the tapping thread 112 may be formed in the second and subsequent thread positions in the first section 110. 1 and 2, the front end of the tapping thread 112 is thinner than the second screw thread 121 and the third screw thread 131, and the height is also higher than those of the second screw thread 121 and the third screw thread 131. The lower third tapping thread 111 may be formed. The third tapping thread 111 may facilitate the entry of the tapping thread 112 from the root side of the inside rather than when entering the perforated hole.

In the second section 120, the distance between the axis of the body 101 and the vertex of the second screw thread 121 starts smaller than the distance between the axis and the tapping thread 112, and goes toward the third section 130. Is formed to increase. 1 and 2, the second section 120 is formed in an inclined shape such that the diameter decreases toward the root.

In the third screw thread 131, a distance between the axial line and the vertex of the third screw thread 131 may be greater than a distance between the axial line and the tapping thread 112. Accordingly, the third screw thread 131 secures a fastening force with the perforation hole of the jawbone. 1, at least one second tapping groove 135 disposed in the circumferential direction may be formed in the third screw thread 131. The second tapping groove 135 serves to receive chips of the jawbone along with self tapping during the entry process of the third screw thread 131.

The action by the shapes of the first section 110, the second section 120 and the third section 130 will be described with reference to FIGS. 3 and 4.

3 and 4 are views showing fastening (placement) to the jaw bone using the dental implant fixture 100 of FIG. 1, and FIG. 3 is a state that is about 70% fastened and FIG. 4 is a fully fastened state. see.

As shown in FIG. 3, when the fixture 100 enters the drilled hole H in which the jawbone has been drilled, the tapping thread 112 is attached to the inner wall of the drilled hole H in the width and radial directions due to the self-tapping action. As the tapping groove T is formed, the second screw thread 121 and the third screw thread 131 that are introduced later are induced to enter. At this time, the fastening is smoothly performed until the entry of the second screw thread 121 is completed. Even when the third screw thread 131 enters the tapping groove T, it can be easily fastened by a sliding action between the second screw thread 121 and the tapping groove T that have previously passed. In addition, as described above, a strong fastening force may be obtained through self-tapping of the third screw thread 131 by the second tapping groove 135.

As shown in FIG. 4, when the lower end of the fixture 100 reaches the lower end of the perforated hole H, the tapping thread 112 is smoothly entered by induction of the third tapping thread 111, and after the fastening is completed The tapping thread 112 may provide a strong fastening force with the jawbone in relation to other threads.

5 is a side view of a dental implant fixture 200 according to a second embodiment related to the present invention. The fixture 200 of the present example also includes a first section 210 and a tapping thread 212 and a third tapping thread 211, a second section 220 and a second thread 221, and a third section 230 ) And a third screw thread 231 and a second tapping groove 235. Their functions and actions are similar to those of the previous embodiment, and a detailed description thereof will be replaced with the previous description.

The fixture 200 of this example includes a first section 210 and a third tapping groove 215 formed at least partially in the second section 220. That is, as shown in FIG. 5, the third tapping groove 215 is formed in a cut-out shape on the first screw threads 211 and 212 and the body so that chips of the jaw bone can be accommodated, so that self-tapping by the tapping thread 112 While enhancing the function, it is possible to secure a space for accommodating the chip.

6 is a side view of a dental implant fixture 300 according to a third embodiment related to the present invention, and FIG. 7 is a trunk portion 301 and a tapping thread 312 of the dental implant fixture 300 of FIG. 6. It is a partial cross-sectional view shown.

The fixture 300 of the present example also includes a first section 310 and a tapping thread 312 and a third tapping thread 311, a second section 320 and a second thread 321, and a third section 330 ) And a third screw thread 331 and a second tapping groove 335. Their functions and actions are similar to those of the previous embodiment, and a detailed description thereof will be replaced with the previous description.

6 and 7, the fixture 300 of the present example has a plurality of first tapping grooves 312c arranged in the circumferential direction in the second tapping thread 312b. The plurality of first tapping grooves 312c may increase the cutting force of the second tapping thread 312b and increase the surface area, thereby providing a strong bonding force by osseointegration.

The configuration and method of the described embodiments are not limited to the dental implant fixture described above. The above embodiments may be configured by selectively combining all or part of each of the embodiments so that various modifications can be made.

100: dental implant fixture 101: body
102: thread 110: first section
111: third tapping thread 112: tapping thread
112a: second tapping thread 112b: third tapping thread
120: second section 121: second section thread
130: third section 131: third section thread
135: second tapping groove

Claims (10)

A body having a fastening hole for fastening the abutment therein;
It includes a thread formed on the main surface of the body,
The thread is,
A first section formed at a portion of the trunk portion that starts to enter the perforated hole formed in the jawbone and includes a shape for self-tapping;
A second section that enters after the first section and has a diameter smaller than that of the first section to reduce fastening resistance; And
It enters after the second section, and includes a third section formed to increase a fastening force with the jawbone,
The first section includes a tapping thread having a thickness thicker than a thread formed in the second section and the third section,
The tapping thread is formed at a position of a second or later thread in the first section,
The tapping thread,
A first tapping thread protruding from the body portion and having a thickness thicker than that formed in the second section and the third section; And
A second tapping thread protruding from the first tapping thread and having a thickness thinner than that of a thread formed in the second section and the third section,
The first section,
A third tapping thread formed at a previous position of the tapping thread, and further comprising a third tapping thread having a thickness thinner than that of the thread formed in the second section and the third section,
A distance between the axis of the body portion and the vertex of the thread of the second section is smaller than the distance between the axis and the tapping thread and is formed to increase toward the third section.
delete delete The method of claim 1,
The tapping thread has a length of 360 degrees (1 rotation) to 720 degrees (2 rotations) along the circumferential direction of the body part, a dental implant fixture.
delete The method of claim 1,
The second tapping thread has a plurality of first tapping grooves arranged in a circumferential direction, a dental implant fixture.
delete The method of claim 1,
A distance between the axis and the apex of the thread of the third section is formed larger than the distance between the axis and the tapping thread, dental implant fixture.
The method of claim 8,
At least one second tapping groove disposed in a circumferential direction is formed in the thread of the third section, a dental implant fixture.
The method of claim 1,
The dentistry further comprising a third tapping groove formed at least partially in the first section and the second section and formed in a cut-out shape on the screw thread and the body so that the jawbone chip can be accommodated. Implant fixture.

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