KR102252783B1 - Dental treatment abutment with multiple holes formed in the cuff to distribute occlusal force and stress - Google Patents

Abstract

A first embodiment of an abutment according to the present invention includes: a coupling part consisting of an upper coupling part that is an upper part coupled with an artificial tooth, and a lower coupling part that is a lower part coupled with a fixture; a cuff having an inverted truncated cone shape with an upper diameter greater than a lower diameter as a portion between the upper coupling part and the lower coupling part; a plurality of hole forming regions extending in a direction parallel to an upper end and a lower end of the cuff to be dislocated from each other at a predetermined distance along a height direction in the cuff; and a plurality of holes formed at regular intervals along the extension direction of the hole forming region, and formed to be dislocated from the holes of the adjacent hole forming region. In addition, a second embodiment of an abutment according to the present invention includes: a coupling part consisting of an upper coupling part that is an upper part coupled with an artificial tooth, and a lower coupling part that is a lower part coupled with a fixture; a cuff having an inverted truncated cone shape with an upper diameter greater than a lower diameter as a portion between the upper coupling part and the lower coupling part; a plurality of hole forming regions extending obliquely in a thread shape to be dislocated from each other at regular intervals along a height direction in the cuff; and a plurality of holes recessed along an extension direction of the hole forming region.

Description

Dental treatment implant abutment with multiple holes in the cuff to distribute stress and occlusal force {DENTAL TREATMENT ABUTMENT WITH MULTIPLE HOLES FORMED IN THE CUFF TO DISTRIBUTE OCCLUSAL FORCE AND STRESS}

The present invention is an abutment of an implant for dental treatment in which a plurality of holes are recessed in the cuff for distributing stress and occlusal force, and in more detail, a plurality of cuffs are left after the artificial teeth and fixtures are combined in the abutment. However, it relates to an abutment capable of excellently distributing occlusal force and stress by providing a unique hole forming pattern reflecting the shape of the cuff and the screw thread coupling direction of the fixture.

The implant is composed of a fixture, which is a fixture that is implanted in the ridge and an artificial tooth that is a prosthesis positioned above it, and an intermediate structure called an abutment is positioned between the fixture and the artificial tooth to support the artificial tooth. It plays a role in connecting with the fixtures.

Abutments can be classified as external or internal depending on the connection method, and can be classified into screw type and cement type according to the prosthesis type, and can be classified into types such as titanium, gold, and zichronia depending on the material.

The abutment is made of metal such as titanium as described above in order to secure the stable support function of the artificial tooth.In this case, it is possible to reproduce the inherent movement of the natural tooth in a state in which the fixture and the gum bone are firmly fixed and coupled. In addition, there was a problem of deteriorating the durability of the implant by not properly distributing the force generated when the teeth collide, that is, the occlusal force.

In order to prevent this problem, Korean Patent Laid-Open No. 10-2010-0138504'a dental implant in which micropores are formed in the abutment' is intended to solve the above-described problem by forming micropores in the abutment.

Specifically, the prior literature of Sungi is a fixture that is directly fixed to the gum bone, connected to the upper part of the fixture, and its outer surface is covered with an abutment consisting of a prosthesis support surface, a gingival contact surface, and a fixture contact surface. In a dental implant consisting of a prosthesis, micropores are formed in a form that completely penetrates between the outer and inner surfaces of the abutment, or partially, on one or both of the gingival contact surface or the fixture contact surface of the abutment. It is published that providing a structure formed in a form that is perforated provides the effect of efficiently distributing loads vertically, obliquely and horizontally to the artificial tooth root fixture of the force generated by the occlusion.

It is recognized that the formation of pores, that is, pores of fine diameter in the abutment (abutment) as described above, provides a feature capable of dispersing the occlusal force as described above.

However, in the prior literature, the role of dispersing by properly transmitting the force and occlusal force acting from the outside by forming the micropores in the area in contact with the artificial tooth or fixture is inevitably weakened.

Moreover, it is only explained that the micropores are formed by simple patterns such as horizontal and left oblique lines, but due to the characteristic of the cuff having an inverted conical structure, the unit areas of the upper and lower parts are different, so the micropores are formed by the above-described simple pattern. When formed, there may be a concern that fatigue or stress may be increased to either side due to a difference in occlusal force distributed at the top and bottom of the cuff.

As mentioned above, it is preferable that the hole is formed in the abutment where the hole is formed in order to disperse the occlusal force, but the cuff, which is the area between the abutment and the artificial tooth or fixture. There is a need to develop an abutment having a new and advanced groove forming pattern formed by sufficiently considering the vector direction of the stress remaining inside the abutment while the fixture is threaded as well as the structural features.

The present invention was conceived to overcome the problems of the above technology, and the vector direction of the coupling force according to the coupling of the fixtures as well as the original shape of the cuff is in the cuff, which is the remaining portion of the abutment. Considering this, it is to provide an abutment that can efficiently disperse occlusal force and stress by forming a plurality of holes with unique patterns.

Another object of the present invention is to differentiate the diameter or number of holes after dividing the arrangement area of the holes due to the characteristic that the unit area of the lower part is smaller than the upper part due to the structure of the cuff having an inverted frustum shape.

Another object of the present invention is to distribute the structure of the cuff having an inverted frustum shape as well as the fatigue and stress generated by the coupling force transmitted in the direction of thread formation for coupling the fixtures to the holes in the hole formation region arranged in the same oblique direction. It maximizes the function of distributing treatment for tooth occlusal force and stress.

It is a further object of the present invention to efficiently increase the function of dispersing the tooth occlusal force and stress by forming the hole into a composite of a slit and a sub hole.

In order to achieve the above object, a first embodiment of the abutment according to the present invention includes: a coupling portion consisting of an upper coupling portion, which is an upper portion coupled with an artificial tooth, and a lower coupling portion, which is a lower portion coupled with a fixture; A cuff having an inverted truncated cone shape having an upper diameter greater than a lower diameter as a portion between the upper coupling portion and the lower coupling portion; A plurality of hole forming regions extending from the cuff in a direction parallel to an upper end and a lower end of the cuff so as to deviate from each other at a predetermined interval along a height direction; And a plurality of holes formed at predetermined intervals along the extending direction of the hole forming region, and formed to be shifted from the holes of the adjacent hole forming region.

In addition, a second embodiment of the abutment according to the present invention includes: a coupling portion consisting of an upper coupling portion, which is an upper portion coupled to an artificial tooth, and a lower coupling portion, which is a lower portion coupled to the fixture; A cuff having an inverted truncated cone shape having an upper diameter greater than a lower diameter as a portion between the upper coupling portion and the lower coupling portion; A plurality of hole forming regions inclinedly extending in the shape of a screw thread from the cuff at a predetermined interval along the height direction to shift from each other; And a plurality of holes recessed along the extending direction of the hole forming region.

In addition, in the first embodiment, the hole is characterized in that the diameter decreases as it progresses from the top to the bottom based on each hole formation region.

According to the abutment of the dental implant having a plurality of holes in the cuff for distributing stress and occlusal force according to the present invention,

1) Due to the characteristic of the structure of the cuff with an inverted frustum shape, the difference in the unit area of the upper and lower cuff occurs, so that the cuff is divided into a plurality of sections based on the height direction, and a hole forming area is arranged for each section. Then, by forming a plurality of holes in the hole forming region, the occlusal force and stress of the tooth can be efficiently distributed and treated,

2) The stress generated when the abutment is combined with the artificial tooth or fixture by arranging the hole formation area in an inclined manner in accordance with the thread coupling direction of the artificial tooth or fixture that is connected to the upper and lower part of the abutment and then forming a number of holes. Since residual phenomena or fatigue can be solved, the implant can be used stably for a longer period of time.

3) By providing a detailed classification of various hole formation patterns according to the cuff's intrinsic structure and screw thread coupling direction, it is possible to more reliably ensure the function of distributing treatment for the occlusal force and stress of the teeth.

4) By forming the hole in a composite structure of slits and grooves, it provides the effect of maximizing the function of distributing treatment against the occlusal force and stress of the teeth.

1 is a cross-sectional view showing the structure of the implant of the present invention including a cuff.
2 is a perspective view showing a first embodiment of the abutment of the present invention.
Fig. 3 is a perspective view showing a modified embodiment of the first embodiment of Fig. 1;
Fig. 4 is a perspective view showing a modified embodiment of the first embodiment of Fig. 1;
5 is a perspective view showing a second embodiment of the abutment of the present invention.
6 is a perspective view showing a modified embodiment of the second embodiment of FIG. 4.
Fig. 7 is a perspective view showing a modified embodiment of the second embodiment of Fig. 4;
Fig. 8 is a perspective view showing a modified embodiment of the second embodiment of Fig. 4;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and the same reference numerals in each drawing refer to the same components.

1 is a cross-sectional view showing the structure of the implant of the present invention including a cuff.

As can be seen from FIG. 1, the implant 1 provides a function to replace the tooth removed by tooth decay or other disease by inserting the artificial tooth 20 into the gum, and the artificial tooth 20, the artificial tooth 20 It consists of an abutment 100 connected to and a fixture 30 inserted into the gum bone.

The artificial teeth 20 are artificially formed teeth instead of natural teeth, and can be formed in various shapes according to the shape of the teeth of the area to be treated, and the fixture 30 is inserted into the gums to harden the gum bones and the artificial teeth 20 As a function of providing a secure fixing function, a screw thread is formed on the outer circumferential surface so that the screw thread formed on the inner circumferential surface of the lower coupling part 120 to be described later can be screwed together.

The present invention relates to an abutment 100 located between the artificial tooth 20 and the fixture 30, and the abutment 100 includes an upper coupling portion 110 and a lower coupling portion 120 and a cuff ( It consists of a cuff) 150, and has a hollow 130 therein.

First, the upper coupling portion 110 is a portion that forms the upper side of the abutment 100 and is a portion that is inserted and coupled into the interior of the artificial tooth 20. The upper coupling portion 110 may be formed in a cylindrical shape, but the lower portion of the upper coupling portion 110 is formed larger than the upper portion of the upper coupling portion 110 to form a truncated cone-like shape having a trapezoidal cross section. It is desirable to provide a structure capable of stably supporting the weight of the teeth 20.

The lower coupling portion 120 is a portion that forms the lower side of the abutment 100 and is a portion coupled with the fixture 30 inserted into the gum bone. The lower coupling part 120 is also formed in a cylindrical shape or in various shapes to be threadedly coupled to the fixture 30.

According to the above, the upper coupling part 110 is covered by the artificial tooth 20 and the lower coupling part 120 is covered by the fixture 30. Between the upper coupling part 110 and the lower coupling part 120 A portion is formed that is not covered by the artificial tooth 20 or the fixture 30, which is referred to as a cuff 200 in the present invention.

As can be seen from FIGS. 1 and 2, the cuff 200 takes a shape of an inverted truncated cone having an inverted trapezoidal cross-sectional shape that gradually decreases in diameter toward the lower portion of the cuff 200. As a result, it is possible to sufficiently support the load of the artificial tooth 20 by connecting the upper coupling portion 110 and the lower coupling portion 120 formed with a relatively smaller diameter than the lower portion of the upper coupling portion 110 to naturally connect. In addition, it is possible to secure a sense of structural stability.

The known implant 1 can replace the function of natural teeth, but there is a problem in that it is difficult to reproduce the inherent movement of the natural teeth because the fixture 30 must be firmly fixed to the gum bone. To this end, the present invention has a core purpose of enhancing the stress and occlusal force distribution function of the abutment 100 by specializing the structure of the improved abutment 100, specifically the cuff 200.

Specifically, the cuff 200 described above is covered by the artificial tooth 20 or the fixture 30, but may be referred to as a region more directly affected by the occlusal force of the tooth. Therefore, if the cuff 200 can disperse the concentrated stress due to the occlusal force and the occlusal force of the teeth, the coupling force between the cuff 200 and the fixture 30 can be prevented from falling, as well as the fixture 30 ) Has the advantage that it can prevent the problem of cracking or fracture due to stress and occlusal force.

To this end, the abutment of the present invention is based on forming a plurality of holes having a unique pattern in the cuff.

In the present invention, the first and second embodiments are largely divided according to patterns of holes formed in a plurality of cuffs, and each of the first and second embodiments includes detailed modified embodiments.

2 to 4 show a first embodiment and a modified embodiment thereof, and Figs. 5 to 8 show a second embodiment and a modified embodiment thereof.

First, a first embodiment of the present invention will be described with reference to FIG. 2.

It is a perspective view showing the first embodiment of the abutment of the present invention.

As can be seen from FIGS. 1 and 2, a hole forming region 250 is formed in a cuff 150 having an inverted truncated cone shape, and a plurality of holes 200 are recessed or penetrated for each hole forming region 250 Is formed.

In the present invention, the hole formation region 250 refers to a region in which the hole 200 is formed in the cuff 150 and provides a space for taking a unique pattern in which the hole 200 is formed.

Specifically, the hole formation region 250 according to FIG. 2 takes a shape such as a line extending in a specific direction, wherein the specific direction is parallel to the upper and lower ends of the cuff 150 (both are parallel to each other). It means a direction extending in one direction, that is, in a horizontal direction.

The hole formation region 250 may be formed to have a length of 30 to 100% based on one circumference of the cuff 150. For example, when the hole forming area is extended by one line, it has a length of 100% compared to the circumference of the kerf 150, and when it is shorter than this, it is divided into 2 to 3 and a certain interval It can be placed in plural. The length of the hole forming region as well as the number according to the length can be differentially adjusted according to the degree of the desired stress and occlusal force distribution function.

In addition, the hole formation region 250 is formed in a plurality at a predetermined interval along the height direction of the cuff 150, that is, a plurality of holes at a predetermined interval from the top to the bottom direction of the cuff 150 It means that it can be formed into dogs.

At this time, the number of hole forming regions 250 may also vary depending on the size of the cuff 150 or the degree of the desired stress and occlusal force distribution function. For example, it is composed of 3 to 5 numbers (rows). It is possible.

In particular, one end and the other end of each hole-forming region 250 are not placed on the same imaginary vertical line, but are disposed to deviate from each other. That is, it means that the plurality of hole forming regions 250 arranged along the height direction of the cuff 150 may be arranged in a zigzag manner.

In the hole forming region 250, a plurality of holes 200 that are recessed or penetrated at a predetermined interval along the extending direction of the hole forming region 250 are recessed or penetrated.

The hole 200 may have a generally circular cross-sectional shape, but may have an elliptical cross-sectional shape as well as other shapes such as a slit shape, which will be described later.

In particular, the holes 200 formed in one of the hole forming regions 250 are not positioned on the same virtual vertical line as the holes 200 of the other adjacent hole forming regions 250 but are arranged to be shifted from each other, that is, in a zigzag manner.

According to such a hole forming pattern, compared to a known abutment in which a hole is formed, as well as the occlusal force of the artificial tooth, as well as the function of preventing stress concentration, are provided to maximize the function.

More specifically, the hole 200 according to FIG. 2 is arranged in accordance with the shape of the cuff 150 in the shape of an inverted truncated cone, and the cuff has an inverted trapezoidal cross-sectional shape, so that the difference in unit area between the upper and lower portions is As a result, it can be said that the hole formation region 250 is formed while having a'height' difference accordingly, and then the hole 200 is disposed.

In other words, since the degree of distributing the occlusal force and the stress may vary depending on the height difference in the cuff 150, this height is set as an important criterion in the present invention, and a plurality of holes 200 are made based on the height difference. By distributing and distributing, as a result, it provides the function of distributing and treating the stress generated by the occlusal force of the teeth stably while having a balance overall without being biased or biased to either side.

In particular, when each hole-forming region 250 has the same start point and end point, that is, when positioned on the same virtual vertical line, a difference in stress accumulation occurs between the portion where the hole-forming region 250 is formed and the portion that is not. Therefore, since the occlusal force and the stress distribution can be made unbalanced, each hole 200 as well as the hole forming region 250 is formed in a zigzag pattern in a position that is shifted from each other to seek the most balanced tooth occlusal force and stress distribution function. .

Accordingly, the structure of the cuff 150 having a pattern in which a plurality of holes is formed according to the present invention is a reverse trapezoidal shape of the cuff 150 than an abutment having a hole 200 formed only in a plurality of pieces. By distributing and distributing the holes 200 based on the height according to the characteristics, the individual holes 200 provide a characteristic of distributing the occlusal force and stress in a balanced and excellent manner, resulting in even distribution of the unit area in charge of the individual holes 200.

3 and 4 are perspective views showing a modified embodiment of the first embodiment of FIG. 1.

3 and 4 are related to a modified embodiment in which the first embodiment of the present invention shown in Fig. 2 is specialized in various structures, and one or two modified embodiments are shown per drawing. In particular, the modified embodiment of FIGS. 3 and 4 has a characteristic that shows in detail various hole pattern structures due to “the shape of an inverted truncated cone of the cuff 150” as in FIG. 2.

Specifically, the modified embodiment according to FIG. 3(a) is formed in the corresponding hole forming region 250 as it progresses from the upper hole forming region 250 to the lower hole forming region 250 based on the cuff 150. It shows a pattern in which the diameter of the hole 200 becomes smaller.

That is, the diameter of the hole 200 formed in the uppermost hole forming region 250 of the cuff 150 is the largest and the diameter of the hole 200 formed in the lowermost hole forming region 250 is the smallest. This means that the diameter of the hole 200 gradually decreases as the row-hole formation region 250 progresses.

This hole-forming pattern sufficiently reflects that the cuff 150 has an inverted truncated cone, that is, an inverted trapezoidal cross-sectional shape. In other words, the unit area covered by the individual holes 200 is the cuff 150 having an inverted trapezoidal cross-sectional shape. It can be said that it takes into account what was changed by.

In other words, the unit area of the upper part of the cuff 150 is relatively increased compared to the lower part due to the shape of the inverted frustum of the cuff 150, so the diameter of the hole 200 is adjusted to increase accordingly. will be.

Accordingly, when the cuff 150 is divided into a plurality of segments based on the vertical (height) direction, a difference in the occlusal force and the stress distribution function occurs at the upper side and the lower side of the cuff 150. It provides a function of distributing stress and occlusal force as uniformly as possible while preventing unevenness of the stress accumulated in the cuff) 150 from occurring or unnecessarily concentrating the stress in a specific area.

The modified embodiment according to FIG. 3(b) shows a structure in which the number of holes 200 formed in each hole forming region 250 decreases as the hole forming region 250 proceeds from the top to the bottom of the cuff 150. Shown.

This also reflects the characteristic that the unit area of the cuff 150 having the shape of an inverted truncated cone is smaller in the lower part than the upper part, and the hole-forming area 250 on the lower side of the upper-side hole-forming area 250 of the cuff 150 As the unit area of) decreases, the number of holes 200 formed in the corresponding hole formation region 250 is reduced accordingly.

The modified embodiment according to FIG. 3(b) also provides a function of distributing the occlusal force and stress as uniformly as possible while preventing the problem that the function of the occlusal force and the dispersing force of the stress is changed according to the difference in the height of the cuff 150. I can.

In particular, the embodiment of Figure 3 (b) is a more specialized process to divide the function of the hole 200 responsible for distributing the occlusal force and stress by unit area, through which the number of holes 200 at a specific height or position. It has the characteristics that can efficiently control the problems that are swaying or rushing.

The embodiment of FIG. 4 shows that the hole 200 is formed in an elliptical shape rather than a circular shape. As a known fact, the ellipse has a major axis and a minor axis so that the major axis and the minor axis extend in a specific direction. In the example, a structure in which the long axis of the oval-shaped hole 200 extends along the extending direction of the hole forming region 250 is presented.

That is, the direction of the main force that distributes or transmits the occlusal force and the stress may be referred to as the extension direction of the hole formation region 250, and the hole 200 is formed long in accordance with this dispersion direction, but can serve as a sufficient stress guide. It can be said that it is formed in an elliptical structure rather than a slit structure to secure the area.

According to the embodiment of FIG. 3, while providing an appropriate dispersion area compared to a hole having a simple circular shape, the dispersion of occlusal force and stress is efficiently distributed in the extending direction of the hole forming region 250, resulting in a slit and a circular shape. It provides a property that can simultaneously prevent the disadvantages of each made hole.

In summary, the modified embodiment according to FIGS. 2 and 3 provides a characteristic capable of performing an appropriate and balanced distribution of occlusal force and stress per unit area in accordance with a cuff 150 having an inverted frustum shape.

5 is a perspective view showing a second embodiment of the abutment of the present invention.

Unlike the first embodiment, the second embodiment of the present invention shown in FIG. 5 has a structure in which the hole forming region is not in the horizontal direction but is inclined from one end to the other.

In this case, when the hole formation region 250 is viewed from the front, it may be inclined upward from the left end to the right end, or may be inclined downward from the left end to the right end.

Preferably, the inclination direction of the screw thread formed on the outer circumferential surface of the lower coupling part 120 to be screwed with the fixture 300, as well as the outer circumferential surface of the upper coupling part 11 in the same direction to be combined with the artificial tooth in some cases. The hole forming region 250 is extended in the same oblique direction as the oblique direction of the formed thread, and as a result, the direction of the force applied when the lower coupling portion 120 is threaded with the fixture 30 and the hole forming region 250 Make sure that the inclination direction of is pointing in the same direction.

The hole forming region 250 may be formed to have a length of 40 to 100% based on one circumference of the cuff 150 as in the first embodiment mentioned above. The extension length of the hole forming region 150 may also be differentially adjusted according to the degree of desired stress and occlusal force distribution function.

In addition, a plurality of hole forming regions 150 of the second embodiment are formed at regular intervals along the height direction of the cuff 150 as in the first embodiment, and the number of hole forming regions 150 is also Depending on the size of the cuff 150, the occlusal height, or the degree of the desired stress and occlusal force distribution function, the number of three to five (rows) may be differentially adjusted. In addition, one end and the other end of each hole forming region 250 are not placed on the same virtual vertical line, but are arranged in a zigzag manner to deviate from each other.

In the hole forming region 250, a plurality of holes 200 that are recessed or penetrated are formed at predetermined intervals along the extending direction of the hole forming region 150.

The hole 200 generally has a circular cross-sectional shape as in the first embodiment, but it is also possible to have a different shape, for example, an oval shape or a slit shape.

In addition, the holes 200 formed in one of the hole forming regions 150 are not positioned on the same virtual vertical line as the hole 200 formed in the other adjacent hole forming region 250, but are arranged to shift from each other.

According to this hole forming pattern, in addition to reflecting the original shape of the cuff 150 described above (the shape of an inverted truncated cone), it acts on the lower portion of the abutment 100 screwed with the fixture 30, that is, the lower coupling portion 120 By considering the direction of the generated force at the same time, as a result, it provides the characteristic that can excellently disperse the occlusal force and stress of the tooth.

Specifically, the hole formation region 250 according to the second embodiment overcomes the difference in unit area due to the shape of the inverted frustum of the cuff 150, and the abutment 100 is used as the fixture 30 (Furthermore, the accumulation of unnecessary stress in the cuff of the abutment 100 due to the repulsive force or stress applied when screwing with the artificial tooth) is distributed along the inclined direction corresponding to the screw thread direction. As a result, it can be efficiently dispersed into a plurality of holes 200 formed in a plurality of recesses along the same direction as the thread formed in the upper/lower coupling portions 110 and 120.

In other words, this vector direction reflects the force combined with the upper/lower coupling portions 110 and 120 and the force of the aggregated stress as compared to the known holes that are simply randomly depressed in the abutment 100. The hole 200 is arranged in a plurality according to it.

In addition, when each hole forming region 250 is located on the same virtual vertical line so that each hole forming region 250 has the same start point and end point, a difference in stress accumulation occurs between the region where the hole forming region 250 is formed and the region where it is not. Therefore, since the occlusal force and the stress distribution can be made unbalanced, each hole 200 as well as the hole forming region 250 is formed in a position that is deviated from each other to seek the function of the occlusal force and stress distribution for the teeth in a balance as much as possible. It is the same as in the first embodiment.

Thus, the hole pattern for the second embodiment formed in the cuff 150 is an external force such as an occlusal force, as well as an artificial tooth 20 and a fixture 30 than the abutment 100 having only a plurality of holes formed. ), the initial stress generated when combined with the abutment 100 unnecessarily remains in the interior of the abutment 100, resulting in increased fatigue, in the direction of the force in which the abutment 100 is screwed with the fixture 30 and the artificial tooth 30. Since the dispersive treatment can be performed along the formation direction of the correspondingly elongated hole 200, as a result, a characteristic of dispersing the occlusal force and stress more excellently is provided.

In the second embodiment as described above, as in the first embodiment described above,

1) The diameter of the hole 200 gradually decreases as it progresses from the upper hole forming region 250 to the lower hole forming region 250,

2) The number of holes 200 decreases as it progresses from the upper hole forming region 250 to the lower hole forming region 250,

3) Of course, it is also possible to have an oval-shaped hole 200 whose long axis extends along the extending direction of the hole forming region 250.

6 and 8 are perspective views showing a modified embodiment of the second embodiment of FIG. 4.

6 and 8 show several modified embodiments that are improved from the above-described second embodiment. First, the modified embodiment of FIG. 5(a) shows a hole in a state in which the hole 200 has a circular shape. A plurality of overlapping structures along the extending direction of the formation region 250 are provided.

만큼 이격하면 서로 겹쳐지면서 돌출된 미세 부위의 거리가 지름의 절반인 r로 줄어들 수 있고, 만일 돌출된 미세 부위의 거리를 더 좁히고자 할 경우에는 원의 중심 사이 거리를

보다 크되 2r보다는 작게 처리할 수 있다. 이는 실무적으로 어버트먼트(100)에 홀(200)을 형성하기 위한 공지의 공작기구에서 0.5m 이하, 레이저 기구로는 50um 이하의 슬릿이나 홀을 만들기 어렵다는 현실을 반영한 것이다.At this time, the distance between each circle may be treated differently depending on the occlusal force and the degree of stress dispersion. For example, when arranging circles with radius r overlapping each other, the distance between the centers of the circles

If spaced apart by, the distance between the protruding minute parts overlapping each other can be reduced to r, which is half the diameter.

Greater than but less than 2r can be processed. This reflects the reality that it is difficult to make a slit or hole of less than 0.5m in a known machine tool for forming the hole 200 in the abutment 100 and less than 50um in a laser device in practice.

The modified embodiment of FIG. 6(a) can be said to complement the disadvantages of the slit above all.

If the hole-forming region 250 is made of only one-letter indented / extended slit, the function of distributing occlusal force and stress may be good, but fine processing is required when processing the cuff 150 mainly made of metal. There may be a problem that comes with the difficulties of the person.

That is, it is preferable to form the modified embodiment according to FIG. 6(a) when the desired occlusal force and the degree of stress dispersion are not high, but when it is difficult to form the slit 210 or when excessive manufacturing cost is required, the convenience of manufacture is sought. To play a role.

Furthermore, when micro-vibration occurs as the slit 210 receives the stress, the risk of fracture may increase if the fluidity due to this vibration increases. If the above-described vibrations are overlapped and arranged in a row, the function of dispersing the impact while touching the protruding micro-parts is added.As a result, the disadvantage of the slit is compensated and the risk of fracture is reduced, as well as the above-described occlusal force and stress distribution function are increased to the maximum I can make it.

In the modified embodiment of FIG. 6(b), a hole is formed in a composite structure of a slit and a groove, and specifically, a slit 210 recessed along the extending direction of the hole forming region 250, and the slit 210 It is a structure consisting of sub-holes 220 recessed in a circular shape with a diameter larger than the height of the slit 210 at both ends.

First, the slit 210 serves to distribute the above-described occlusal force and stress evenly over a relatively wide area along the extending direction of the hole forming region 250. In addition, since the slit 210 has a larger area than the above-described circular hole 200, it is possible to increase the occlusal force and the dispersing force against stress.

In addition, the sub-hole 220 has a function of not only enhancing the durability of the cuff 150 in which the slit 210 is formed, but also adding an efficient dispersing force of stress and occlusal force.

Specifically, when both ends of the slit 210 are torn or stretched unnecessarily by an external force, when both ends of the slit 210 are torn or stretched unnecessarily, the overall durability of the abutment 100 may be impaired. ) Is disposed at both ends of the slit 210 to solve the above-described problem.

In addition, the sub-hole 220 serves to solve the above-described tearing problem by efficiently distributing the stress concentrated at the ends of the slit 210 by the occlusal force when the occlusal force of the tooth is applied, while further distributing the stress. Can be combined.

Further, when the teeth are weakly occluding and the occlusal force is not large, as described above, the occlusal force can be sufficiently dispersed with only the slit 210, but if a relatively large occlusal force is applied, the stress is concentrated to the central area or both ends, and the fatigue of the corresponding area is also increased. When the implant 1 is used for a long period of time, there may be a fear of fracture from the corresponding area. However, since the above-described sub-hole 220 can efficiently disperse the stress concentrated at both ends of the slit 210 for a longer time. It can provide a basis for ensuring the stability of the implant 1 so that fatigue does not increase relatively even when used.

That is, the modified embodiment of FIG. 6(b) is an improved structure provided by supplementing the shortcomings of the slit 210 and the circular groove as much as possible, and provides a role that can sufficiently reinforce the occlusal force and the stress distribution function as well as the durability. .

The modified embodiment of FIG. 7(a) shows an improved structure of the sub-hole 220 of the modified embodiment of FIG. 6(b), in which the sub-hole 220 is an inner part that is an end part from an outer part that is an introduction part. It takes a structure like a truncated cone, which is tapered so that the diameter increases as it extends, in other words, a narrow structure with external light.

In this structure, the diameter of the inner portion is relatively larger than the diameter of the outer portion in order to secure a physical area that can accommodate the stress remaining or concentrated in the inner portion of the sub-hole 220.

Furthermore, in the modified embodiment of FIG. 7(a), the external diameter of the sub-hole 220 is unnecessarily large, thereby preventing a problem that causes cracks to occur, while securing a sufficient internal space, and thus the above-described sub-hole 220 ) Can provide a basis for efficiently receiving the stress from the surrounding area and then distributing it.

The modified embodiment of FIG. 7(b) also provides an improved structure of the sub-hole 220 of the modified embodiment of FIG. 6(b).

This structure is provided with an expansion hole 230 which is further recessed in the inner direction from the bottom surface (the innermost inner surface) of the sub-hole 220 but has a larger diameter than the sub-hole 220.

The expansion hole 230 provides a structure such as a hidden hole that is not easily visible from the outside, and this is also a physical area capable of receiving the stress concentrated in the inner portion of the sub hole 220 as described above. It performs the function of maximizing the stress distribution function by securing.

In addition, it is possible to secure an appropriate outer diameter of the sub-hole 220 more stably than the modified embodiment of FIG. 7(a), so that the outer diameter of the sub-hole 220 is larger than the height of the slit 210, By sufficiently receiving the stress, it is possible to prevent the problem that it is difficult to implement the occlusal force and the dispersing effect of the stress.

The embodiment of FIG. 8 shows a structure in which corrugations are formed on inner circumferential surfaces of slits and sub-holes in FIG. 6(b) described above.

The wrinkle portion 240 refers to a portion that can be recognized as if a wrinkle occurred due to a plurality of fine protrusions formed on the inner circumferential surface of the slit 210 or the sub hole 220.

In other words, the occurrence of irregularities caused by the area where the microprotrusions are formed and the surrounding area is referred to as'wrinkles' 241 in the present invention, and the wrinkles 241 are arranged in a plurality at regular intervals. It is called (240).

These corrugations 240 expand the surface area of the inner circumferential surface of the slit 210 or the sub-hole 220, and as a result, compared to a structure composed of a simple flat surface, a characteristic capable of efficiently dispersing or absorbing external impacts including occlusal force. Provides.

These wrinkles 241 may have various patterns to oriented in a specific direction or in a random direction on the inner circumferential surface of the slit 210 or the sub-hole 220.

In particular, in the corrugation portion 240 formed on the inner circumferential surface of the sub-hole 220, the number of corrugations of the two sub-holes 220 may be different.

That is, the number of wrinkles is formed in the upper sub-hole 220 rather than the lower-side sub-hole 220 based on any one of the holes 200 according to FIG. 6(b) or 8.

Here, the number of wrinkles 241 can be understood to mean the density of the wrinkles 241, that is, the number of fine projections for forming wrinkles increases per unit area. At this time, the size of the fine protrusions forming the wrinkles 241, that is, the volume is not necessarily the same, but has a similar volume, and focuses on a standard set based on'density', and can take various shapes instead.

As described above, due to the structure of the cuff 150 having an inverted truncated cone shape, the unit area covered by the upper sub-hole 220 is relatively increased compared to the lower sub-hole 220 located under the cuff 150 In other words, by forming more wrinkles 241 in the upper-side sub-hole 220 than in the lower-side sub-hole 220, the occlusal force can be distributed more efficiently.

In addition, it is possible to process the wrinkles 240 formed on the inner circumferential surface of the slit 210 so that the number of wrinkles 241 increases as it progresses from the lower end of the slit 210 to the upper end.

This is also treated according to the phenomenon that the unit area in charge of the upper end portion is increased compared to the lower end portion of the slit 210 located under the cuff 150 due to the structure of the cuff 150 having an inverted frustum shape. It can be said that it was one thing.

Such a detailed structure is based on the results of analyzing in detail the difference in density and discrimination criteria of the concentrated area as well as the direction of occlusal force by sufficiently considering the intrinsic shape of the cuff 150 as well as the screw thread coupling direction of the fixture 30. Accordingly, the above-described various structures have been proposed, and it is of course possible to maximize the function of distributing treatment for the occlusal force and stress of the teeth through this.

As described so far, the configuration and action of the abutment of the dental implant in which a number of holes are formed in the cuff for distributing stress and occlusal force according to the present invention are expressed in the above description and drawings, but this is only described as an example. Thus, the spirit of the present invention is not limited to the above description and drawings, and various changes and changes can be made without departing from the technical spirit of the present invention.

1: implant 20: artificial tooth
30: fixture 100: abutment
110: upper coupling portion 120: lower coupling portion
130: hollow 150: cuff
200: hole 210: slit
220: sub hole 230: expansion hole
240: wrinkle part 241: wrinkle
250: hole formation area

Claims (11)

delete delete delete delete As an abutment of a dental implant in which a number of holes are recessed to distribute stress and occlusal force,
A coupling portion consisting of an upper coupling portion, which is an upper portion coupled to the artificial tooth, and a lower coupling portion, which is a lower portion coupled to the fixture;
A cuff having an inverted truncated cone shape having an upper diameter greater than a lower diameter as a portion between the upper coupling portion and the lower coupling portion;
A plurality of hole forming regions obliquely extending in the shape of a screw thread from the cuff at regular intervals along the height direction;
Including; a plurality of holes recessed along the extending direction of the hole forming region,
The hole is,
Abutment, characterized in that consisting of a slit recessed along an extension direction of the hole formation region, and a sub-hole recessed in a circular shape with a diameter greater than the height of the slit at both ends of the slit. The method of claim 5,
The hole is,
In the state of being in a circular shape,
Abutment, characterized in that a plurality of overlapping along the extending direction of the hole forming region. delete The method of claim 5,
The sub-hole,
The abutment, characterized in that tapered so that the diameter increases as it extends from an outer portion as an introduction portion to an inner portion as a termination portion. The method of claim 5,
The sub-hole,
An abutment further comprising an expansion hole having a diameter larger than that of the sub-hole as being further recessed from the bottom surface in the inward direction. The method of claim 5,
On the inner circumferential surface of the sub-hole,
A plurality of wrinkles formed wrinkles are formed,
The abutment, characterized in that the number of the corrugations is greater in the upper sub-hole than the lower sub-hole of the hole. The method of claim 5,
On the inner circumferential surface of the slit,
A plurality of wrinkles formed wrinkles are formed,
The abutment, characterized in that the number of wrinkles increases as the slit proceeds from the lower end to the upper end.

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