JP2000093435A - Implant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prohibit the propagation of bacteria within an implant by providing the implant with a sealing part for prohibiting the infiltration of bacteria, etc., into the implant from a supporting side of a dental technical structure and interposing sealing members in this sealing part. SOLUTION: An implant 1A is provided with a threaded part 21 on the outer periphery of a cylindrical body and is provided with arbitrary slit parts 22 of a U shape penetrating its peripheral wall part. The inner peripheral side of the region enclosed by the respective slit parts 22 is provided with receiving projecting parts 23 at total three points above and below, by which the cylindrical implant 20 is constituted. A flaring screw body 25 provided with bulging projecting parts 24 at total three points above and below in the positions respectively corresponding to the respective receiving projecting parts 23 on the outer periphery is inserted into such implant 20. The joint surfaces 25d and 20f of the head 25a and detaining step part 20e of the flaring screw body 25 are provided with the sealing part 70.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an implant for fixing a structure for dental work to a jaw bone.

[0002]

2. Description of the Related Art Conventionally, as an implant body for fixing a denture to a jaw bone, a first implant constituent member (base member) to be inserted into the jaw bone, and the first implant constituent member are connected to the jaw bone to form a dental implant. An invention comprising a second implant constituent member (holder member) for supporting the above structure is disclosed in, for example, JP-A-7-23983 or JP-A-8-196548.

[0003] In implementing the above-mentioned implant body, after the first implant constituent member is erected at a required position of the jaw bone, the gingiva of that portion is re-sewn, and after waiting for a required period, the jaw bone grows. This ensures that the implant component is firmly fixed to the jawbone.

[0004] In addition to the invention of the implant body,
The invention of U.S. Pat. No. 3,708,883 has been developed and implemented. This implant body is, as shown in FIGS.
The base member and the holder member of the implant body are integrated, and the base portion 41 is fixed to the jaw bone 60.
An implant main body 43 integrally formed with a holder portion 42 for supporting (fixing) a denture 62 on an upper portion of the implant main body 43 and an operating member 46 for expanding an expanding piece 44 of a base portion 41 of the implant main body 43 are connected to the implant main body 43. Are mounted so as to be able to move up and down in the axial direction.

[0005] The implant main body 43 is formed in a cylindrical shape, and the base portion 41 is provided with an upper holder portion 42.
A thread-shaped projection 47 is provided on the outer surface of the two opposing expansion pieces 44 which are formed to have a larger diameter and are freely expandable, and the inner surface is provided with a cam 48 of the operation member 46. It is constituted by having a cam surface 49 to be engaged.

[0006] Further, the operating member 46 is provided at the lower portion of a round bar-shaped main body 51 inserted vertically movably in the axial direction in the cylindrical portion 50 of the implant main body 43.
8 and a screw portion 53 for screwing an operation nut 52 for vertically moving the main body 51 in the axial direction of the implant main body 43 on the upper outer periphery of the main body 51. .

After the implant body 40 is inserted into the implanted portion 61 of the jaw bone 60 shown in FIG. 44, the body 52 of the operating member 46 is raised by rotating the nut 52, and the base is The expanding piece 44 of the portion 41 is expanded outward.

[0008] The expanding piece 44 of the base portion 41 is expanded by the cam 48 of the operating member 46 to the position shown by the dotted line in FIG.
Can be fixed in the implant 61 of the jaw bone 60, as shown in FIG. Then, the denture 62 can be fixed via the holder portion 42 of the implant body 40.

FIGS. 47-49 show US Pat. No. 5,568,116.
In the invention of No. 7, the number of the expanding pieces 44 of the implant body 40 is four (or three or the like). That is, the implant body 43 of the implant body 57 in FIGS. 47 to 49 is provided with four slits 54 at equal intervals between the slits 54 in the length direction of the cylindrical base portion 41, and the slits 54 A cam surface 4 is provided on the lower inner surface of each of the four expanding pieces 44 provided.
9 is formed.

The operating member 46 of the implant body 43
As shown in FIG. 48, a main body 58 composed of a threaded rod is rotatably inserted into a locking step 55 provided in a cylindrical portion 50 of the base portion 41 while locking a head 56,
The cam 48 is screwed to the lower portion of the main body 58.

The holder 42 of the denture 62 is different from the implant body 40 in that the holder 42 is formed separately from the implant body 43 as shown in FIG.
It is configured by being fixed to the connecting portion 45 on the upper portion of the base portion 41.

The method of implanting the implant body 57 having the above-described structure into the implanted portion 61 of the jaw bone 60 is the same as that of the implant body 40, and therefore the description thereof is omitted.
Only that state will be shown in FIG.

[0013]

The above-mentioned Japanese Patent Application Laid-Open No.
In the case of the implant body described in JP-A-239983 and JP-A-8-196548, once the first implant constituent member is implanted in the jaw bone, it is strongly fixed by the growth of the jaw bone. After waiting, it was necessary to continue incision of the gingiva at the implanted portion of the same member, exposing the upper part of the first implant constituent member, and continuing the fixing operation of the structure in dental technics thereafter.

[0014] Therefore, after the first implant component is implanted, the patient cannot recover a sufficient mastication function for a period of usually six months, and is forced to live an inconvenient life. Incision of the gingival part of the implanted part of the implant component was also accompanied by physical pain.

[0015] In short, it was impossible to implant the implant body according to the above-mentioned disclosed technique in the extraction cavity immediately after tooth extraction.

That is, there is an individual difference in the shape of the extraction socket, and even if the first cylindrical implant component is implanted in the extraction socket, the area of close contact with the jaw bone and / or alveolar bone is small, and the strength is also low. Sufficient fixation cannot be obtained. Therefore, usually after tooth extraction,
It has been necessary to wait for several years for the extraction socket to completely disappear, and in addition, it has been known that after the extraction socket, the jaw bone and / or the alveolar bone became thinner and the first implant component was implanted. At present, it is frequently the case that standing itself becomes difficult.

Alternatively, the invention of US Pat. No. 3,870,883 and US Pat. No. 5,681,167, which are developed and implemented.
In the implant bodies 40 and 57 of the invention of No. 2, the shape of the implanted portion 61, for example, the shape of the extraction hole of the implanted portion 61 is different by expanding the plurality of expanding pieces 44 in the implanted portion 61. Therefore, the present invention has an advantage that it is possible to implant in the tooth extraction cavity immediately after tooth extraction while eliminating the disadvantages of the implants disclosed in the above publications.

However, in the implants disclosed in the above publications and the implants 40 and 57 in US Pat. No. 3,708,883 and its modifications, in any case, the bacteria in the implanted body 43 in the implanted state are not considered. No measures have been taken to prevent such intrusions.

Therefore, the present invention provides an artificial tooth that can be used on the same day by increasing the holding force between the tooth extraction cavity and the like.
In particular, it is an object of the present invention to provide an implant body capable of preventing invasion of bacteria and the like into the implant main body in an implanted state of the implant main body.

[0020]

According to a first aspect of the present invention, there is provided an implant capable of expanding a required portion of an implant main body for supporting a structure in dental technology outward. An implant body provided with a seal portion for preventing bacteria or the like from entering the interior of the implant body from the support side of the dental technical structure in the implanted state of the implant body. The seal portion is configured by interposing a seal member.

According to a second aspect of the present invention, in the implant body according to the first aspect, the sealing portion is formed by joining an operating member or an expanding screw body for expanding a required portion of the implant body outward to the implant body. The sealing member is interposed in the joining portion to be formed.

According to a third aspect of the present invention, in the implant body according to the first aspect, the seal portion includes a seal member between a joint surface between an outer periphery of the operating member or the expanding screw body and an inner periphery of the implant body. It is characterized in that it is configured by interposing.

[0023]

Embodiments of the present invention will be described below in detail.

(Embodiment 1) FIGS. 1 and 2 are enlarged sectional views showing a main part of an implant body according to Embodiment 1 of the present invention.

The first embodiment is described with reference to FIGS.
This shows a case where the present invention is applied to the implant body 40 shown in FIG.

Therefore, the detailed description of the entire structure of the implant body 40 is omitted for the same components as those in FIGS. 44 to 46, and the implant body 43 and the operating member 46 will be described below.
The configuration of the seal portion 70 provided therebetween will be described with reference to FIGS.

In FIG. 1, reference numeral 71 denotes the implant body 4.
An O-ring 72 is fitted in the annular groove 71 provided on the inner peripheral surface of the third holder portion 42.

Therefore, when the operating member 46 moves up and down in the axial direction of the implant main body 43 due to the rotation of the nut 52 (shown in FIG. 46) in the holder portion 42 of the implant main body 43, In addition, the expanding piece 44 of the implant main body 43 is expanded and the implanted portion 61 (FIG. 44)
Even in the standing state fixed inside, the space between the holder portion 42 and the round bar-shaped main body 51 of the operation member 46 is always sealed by the O-ring 72.

As shown in FIG. 2, the seal portion 70 shown in FIG. 1 is provided with an annular groove 71 on the side of the holder portion 42 of the implant body 43, and an O-ring 72 is fitted into the annular groove 71. On the contrary, an annular groove 73 is provided on the outer peripheral surface of the round bar-shaped main body 51 of the operating member 46, and O is provided in the annular groove 73.
It is configured by fitting a ring 72, and the sealing member 70 also allows the implant body 43 in the implanted state in the implanted body 40 to be in contact with the operating member 46.
A sealing action between them is obtained.

The sealing portion 70 of the implant body 40 maintains watertightness and airtightness between the implant body 43 and the operating member 46 in the implanted state of the implant body 40, so that bacteria and the like in the implant body 43 are kept. Intrusion can be completely prevented.

(Embodiment 2) FIGS. 3 and 4 are enlarged sectional views showing the main parts of an implant according to Embodiment 2 of the present invention.

In the embodiment 2, FIG.
This shows a case where the present invention is applied to the implant body 57 shown by Nos. 49.

Therefore, as in the first embodiment, the overall structure of the implant body 57 will be described with reference to FIGS.
The description of the same components as those of 49 will be omitted, and the configuration of the seal portion 70 provided between the implant body 43 and the operation member 46 of the implant body 57 will be described below with reference to FIGS.

In FIG. 3, reference numeral 74 denotes the implant body 4
The operating member 46 is attached to the implant main body 43 in a state where the O-ring 72 is fitted into the annular groove 74 by an annular groove provided on the inner peripheral surface 55 a of the locking step portion 55 of the operating member 46.
Of the operating member 46 by being fitted in the base portion 41 of the
The head 56 is locked by the locking step 55, and the base (round bar) 5 with the main body (screw rod) 58 below the head 56.
9 between the outer peripheral surface 59a and the inner peripheral surface 55a of the locking step 55.
A seal section 70 in which the ring 72 is interposed is configured.

Therefore, the implant body 43 is
The joint surfaces 55a and 59a between the implant body 43 and the operating member 46 during the operation of rotating the operating member 46 when the implant is implanted in the implanting portion 61 and in the implanted state of the implant body 43 thereafter. Watertight and airtight sealing is achieved by the sealing portion 70 having the above configuration.

FIG. 4 shows a configuration in which the O-ring 72 in the configuration of the seal portion 70 in FIG. 3 is supported on the operation member 46 side, and an annular groove provided on the outer peripheral surface 59a of the base 59 of the head 56. An O-ring 72 is fitted in the inside 75.

Therefore, with the seal portion 70 having the configuration shown in FIGS. 3 and 4, the same operation and effect as in the first embodiment can be obtained.

Incidentally, the seal portion 70 of the first and second embodiments is used.
Examples of the material for forming the O-ring 72 used in the configuration of the above include a biocompatible medical elastomer, for example,
Use natural rubber, isoprene rubber, silicon rubber, polyolefin silicone rubber, butyl rubber, polyurethane rubber, and the like.

Third Embodiment FIGS. 5 to 17 show an implant 1 according to a third embodiment of the present invention and a method for forming the same.

The implant body 1 shown in FIG. 5 includes an implant body 2 formed by coating titanium or stainless steel with apatite or the like and using a material having a good affinity for a living body to form a substantially cylindrical shape.

The implant main body 2 may be formed in a polygonal shape such as a square tube or the like in consideration of the use state in the extraction socket of the molar teeth in addition to the cylindrical shape.

The implant body 2 has a jawbone and / or
In order to enhance the adhesion to the alveolar bone and to disperse the force of mastication applied from above, a screw portion 2a is provided on the outer periphery of the cylindrical body. Further, the implant main body 2 is provided with a U-shaped slit portion 3 as shown in FIG. In two places,
A total of six locations are provided. As shown in the upper part of the cylindrical body in FIG. 6, the slit portions 3 at the upper part of the implant body 2 have long sides along the circumferential direction of the implant body 2 and short sides in the length direction of the implant body 2. It has a shape that follows. The slits 3 provided at two places in the center and lower part of the main body, respectively, have long sides extending in the length direction of the implant main body 2 as shown on the lower side of the cylindrical body in FIG. The shape has a short side along the direction. In addition, it is desirable that the slit portion 3 is formed such that a cut is made from the outer peripheral side so that the slit portion 3 is easily expanded outward.

As shown in FIG. 5, the area surrounded by the two slits 3 on the upper part of the implant main body 2 is bulged outward from the outer peripheral surface of the implant main body 2 to form two bulges. Parts 4a and 4b, and implant body 2
The area surrounded by the two slits 3 at the center of the implant body 2 is bulged outward from the outer peripheral surface of the implant body 2, and the two bulged parts 5 a and 5 b opened upward to the implant body 2. In addition, two regions opened downward from the outer periphery of the implant body 2 by swelling the region surrounded by the two slits 3 at the lower portion of the implant body 2 downward. Swelling portions 6a, 6b
And

Each of these bulging portions 4a, 4b, 5a, 5b,
The shapes of 6a and 6b can be a U-shape, a mountain shape, a substantially semicircular shape, a trapezoidal shape, or the like that approximates the U shape.

As shown in FIG. 7, the inside of the implant body 2 is tapered along the length direction or the circumferential direction.

The tapered processing will be described below. A hole 7 eccentric as shown in FIG. 7 from one end of the implant body 2 of the implant body 1 subjected to the outer shape processing.
a, 7b, and 7c are opened slightly before passing through the other end. Further, a hole 9 having a size that does not impair the tapered portion 8 on the inner periphery of the implant body 2 formed by the holes 7a, 7b, 7c is formed so as to penetrate along the center of the implant body 2. Furthermore, three holes 7a,
A hole (not shown) including a tapered portion 8 in the inner periphery of the implant body 2 formed by 7b and 7c is formed in the upper part of the implant body 2 of the implant body 1. The above hole machining can be performed by electric discharge machining or the like other than machining with a drill. Next, a female screw is cut halfway through the largest hole.

The bulging portions 4a, 4b, 5a, 5b, 6
The expansion screw body 10 for expanding the a and 6b will be described with reference to FIG. The lower end 115 of the expanding screw body 10 fits into a hole (not shown) of the lower end 2b of the implant body 2 of the implant body 1, and an arbitrary number of projections 11 b provided on the expanding screw body 10 It is rotatably supported along the tapered portion in the implant main body 2 and pushes the tapered portion outward as shown in FIG. 9 to form the bulging portions 4a, 4b, 5a, 5b, 6a, 6b.

When the expanding screw body 10 is inserted into the implant body 2, the inner end face 11d (joining surface) of the head 11a of the expanding screw body 10 is positioned at the upper end 2d (see FIG. 5), the expanding screw body 10 provided inside
Is mounted in a state of being joined to the locking step 2e with the head 11a. The groove 11e provided at the upper end of the expanding screw body 10
Is used when manually applying rotational force with a tool such as a screwdriver.

A step portion 11c provided on the outer peripheral surface of the convex portion 11b of the expanding screw body 10 engages with a corner portion 12 of a tapered portion in the implant main body 2 as shown in FIG.
The expanding screw body 10 is fixed in place.

Further, the implant body 2 having the above configuration
Also, in the same manner as in the first and second embodiments, the head 11a of the expanding screw body 10 corresponding to the operating member 46 in the first and second embodiments and the upper end of the implant body 2 for locking the same. It is constituted by providing a seal portion 70 between the joining surfaces 11d and 2f with the locking step 2e provided inside the 2d.

As the embodiment of the seal portion 70 between the joint surfaces 11d and 2f between the head 11a of the expanding screw body 10 and the locking step 2e, the embodiment shown in FIGS. Will be described.

First, the embodiment shown in FIG.
e, an annular groove 76 is provided on the joint surface 2f of the expanding screw body 10 with the head 11a, and an O-ring 72 is fitted into the annular groove 76, whereby the expansion mounted on the implant body 2 is performed. A seal 70 is formed between the joint surface 11d and 2f of the head 11a of the screw body 10 and the locking step 2e.

The material for forming the O-ring 72 is as follows.
The O-ring 72 used in the first and second embodiments is made of the same material.

In the embodiment shown in FIG. 11, an O-ring 72 is fitted in an annular groove 77 provided in a joint surface 11d of the head 11a with the locking step 2e.

In the embodiment shown in FIG. 12, the O-ring 72 is interposed between the inclined joint surfaces 80 and 81 of the joint surface between the head 11a of the expanding screw body 11 and the locking step 2e. ,
This shows a case where the seal portion 70 is configured. In this case,
An annular groove is provided on one of the inclined surfaces 80 and 81, and an O-ring 72 is fitted in the annular groove. In particular, in FIG. An annular groove 78 is provided on the side of the inclined joint surface 81 of the portion 2e, and only one case where the O-ring 72 is fitted in the annular groove 78 is shown, and the other embodiment is omitted.

Further, the embodiment shown in FIG. 13 is a modification of the embodiment shown in FIG. 12, and the configuration in which the seal portion 70 is formed between the inclined joint surfaces 82 and 83 is different from the embodiment shown in FIG.
The case where the O-ring 72 is fitted into the annular groove 79 of one of the joining surfaces 83 can be implemented by fitting the O-ring 72 into the annular groove of one of the joining surfaces. The embodiment of the other joint surface 82 is omitted from illustration as in FIG.

In particular, in the case of this embodiment, when the implant main body 2 is in the erected state, the implant main body 2
A structure in which bacteria or the like entering the inside is once dropped into the drop groove 84 so as to prevent the bacteria from directly reaching the seal portion 70, and the sealing action of only the seal portion 70 can be promoted by the drop groove 84. It was done.

The sealing portion 70 shown in FIGS. 10 to 13 of the first and second embodiments or the third embodiment has an O-ring 72 as a sealing member and one of the joining surfaces on which the sealing portion 70 is provided. FIGS. 14 to 1 show an embodiment which is configured to be fitted in an annular groove provided in FIG.
The sixth embodiment is different from the first and second embodiments in that
This shows an embodiment configured by directly interposing a seal member between d and 2f.

In the embodiment shown in FIG. 14, the sealing portion 70 is formed between the head 11a of the expanding screw body 10 and the joining surfaces 11d and 2f of the locking step 2e of the implant body 43. Chamfered portion 1 provided on the outer periphery of the lower surface of portion 11a
An O-ring 72 is interposed between the corner 2g of the joint surface 2f of the step 1e and the locking step 2e.

In the embodiment shown in FIG.
0 of the head 11a and the joining surfaces 11d and 2f of the locking step 2e.
This shows an embodiment in which the seal portion 70 is configured by interposing an annular packing 86 as a seal member between them.

An annular packing 86 as the seal member
Is formed of the same material as the O-ring 72 as the sealing member.

The annular packing 86 is replaced with a sealing member such as an annular washer or a disc spring made of a metal material such as titanium, gold, silver or an alloy thereof instead of the illustrated annular packing 86. , A seal portion (not shown) can be formed.

The structure of the annular packing 86 is shown in FIG.
As shown in FIG. 5, an annular bulge 86a having elasticity on the outer periphery.
Are provided, and the respective bulges 4a, 4b, 5a, 5b, 6a, 6a,
6b, caused by the reaction force of the bulging action of the expanding screw body 1
No. 0 is configured to be able to exert a sealing action by a press-contact action between the two joining surfaces 11d and 2f.

The seal portion 70 according to each of the embodiments shown in FIGS.
It can be carried out while selectively adopting the structure required for the implant main body 43 including the seal portion 70 in the above, watertightness, airtightness and other reasons.

Therefore, each of the embodiments shown in FIGS.
Depending on the requirements of the implant main body 43, it may be implemented by a configuration composed of a combination of the embodiments.

As described above, the implant body 1 can be formed. As shown in FIG. 16, the bulging portions 4a, 4b, 5a, 5b, 6 correspond to the erected portions of the jaw bone 17.
The a and 6b are erected while being expanded by the operation of the expanding screw body 10.

Further, in this implanted state, the invasion of bacteria and the like into the implant main body 2 can be prevented by the above-mentioned sealing portion 70 while sealing the watertight and airtight. And
After the completion of the implantation of the implant body 1, the implant body 1
A holder 19 is attached to the upper part of the device, and the denture 18 is attached via the holder 19.

Also, due to the structure of the implant body 1, if the bulging portions 4a and 4b are provided at the uppermost part of the implant body 1,
It can be extended to dense parts of the jawbone and / or alveolar bone, and exerts a strong holding force. In addition, the direction of the bulging portions 4a and 4b can be used for the short implant body 1 corresponding to a thin affected part of the jaw bone and / or the alveolar bone. Furthermore, in the case where the tip is bifurcated into two or three, such as in the extraction fossa of the molar part, it has been impossible to cope with the conventional expandable implant body. 1 enables adaptation to the molars.

When the bulging portions 6a and 6b are provided in the downward direction of the implant body 1, they have a large holding force against the force applied to the implant body 1 from above during mastication. It can be said that the portion where the bone density is increased by the swelling of the swelling portions 6a and 6b works effectively.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to FIGS.

The implant body 1A of the fourth embodiment is
A screw portion 21 is provided on the outer periphery of the cylindrical body, and an arbitrary U-shaped slit portion 22 penetrating the peripheral wall portion is provided. A head 25a as shown in FIGS. 17 and 18 is provided inside the cylindrical implant body 20 provided with the receiving projection 23, and each of the receiving projections 2 on the outer periphery is provided.
And three bulges 24 in total at the top and bottom at positions corresponding to
Is inserted, the head 25a of the screw body 25 is rotated, and the receiving protrusion 23 is moved outward by the bulging protrusion 24 of the spread screw body 25 (the length of the implant body 1A). 18, the region surrounded by the slit portion 22 by swelling in the direction of the outer periphery is defined as an arbitrary number of swelling portions 27, and the implant body 1A shown in FIG. 18 having the same shape as that shown in FIG. is there.

The expanding screw body 25 is inserted into the implant body 20, and the expanding screw body 25 is inserted into the locking step 20 e of the expanding screw body 25 provided inside the upper end portion 20 d of the implant body 20. The head 25a is attached with the head 25a engaged, and the joint surfaces 25d and 20f between the head 25a and the locking step 20e are provided in the third embodiment as described above.
A seal portion 70 having the same configuration as that described above is provided. It should be noted that the configuration applies the configuration of the embodiment of FIGS. 10 to 16 in the third embodiment, and a specific description and illustration are omitted.

As shown in FIGS. 17 and 18, a through hole 20a is provided in a part of the implant main body 20, and a through hole 28 is also provided in the expanding screw body 25, so that the locking pin 2 is secured.
By inserting 9 into the through hole 28 from the extraction hole 20a, the expansion screw body 25 can be fixed at a fixed position and the bulging portion 27 can be prevented from entering the implant body 20 side.

In this case, the wave washer (or disc spring body) 3 is positioned between the lower side of the locking step portion 20 e of the implant body 20 and the pin 29, and is provided on the outer periphery of the expanding screw body 25.
0, and the above-described joining surface 25d of the head 25a,
Together with the sealing portion 70 between the joining surface 25d of the head portion 25a and the joining surface 20f of the locking step portion 20e of the implant body 20 to be joined, from the space between the spread screw body 25 and the implant body 20. Bacteria and the like can be reliably prevented from entering the implant body 20.

The locking pin 29 and the hole 20a
, The sealing member is also interposed between the locking pin 29 and the through hole.
Invasion of bacteria and the like into the inside can be more completely prevented.

FIG. 19 shows the swelling operation of the bulging portion 27 provided on the expanding screw body 25. The bulging convex portion 24 has an elliptical shape as a whole so as to have a protruding length (L) larger than the diameter (D) of the shaft portion 25b symmetrically with respect to the shaft portion 25b of the expanding screw body 25, for example, at 180 degrees. By rotating the expanding screw body 25 by 90 degrees in the direction of the arrow a shown in FIG. 19, the two protruding ends of the bulging portion 24 are brought out of contact with the corresponding receiving convex portions 23 and are pushed outward. Thus, a region surrounded by the slit portion 22 is a bulging portion 27. The bulging protrusion 24 has a shape as shown in FIG.
That is, it is also possible to use a cam having a stepped portion protruding outward in a 180-degree symmetrical arrangement with respect to the shaft portion 25b and having a threaded portion 24a on the outer peripheral portion. In this case, by providing the threaded portion 23a also on the receiving convex portion 23 side expanded by the bulging convex portion 24, when the expanding screw body 25 is rotated 90 degrees in the arrow direction as shown in FIG. The protruding portion 27 can be formed while the protruding portion 24 is screwed into the receiving protruding portion 23.

The processing for the implant body 1A is as follows.
A hole that penetrates the inside of the implant body 1A whose outer shape has been formed is formed from one end of the implant body 1A, and a receiving protrusion 23 is provided on the inner peripheral side of a region surrounded by the slit portion 22. Further, the machining of the implant body 1A can be performed by using electric discharge machining.

(Fifth Embodiment) Next, an implant body 1B according to a fifth embodiment of the present invention will be described with reference to FIGS.

This implant body 1B is provided with a threaded portion 31 on the outer periphery of the cylindrical body, and an arbitrary U-shaped slit portion 32 penetrating the peripheral wall portion (the upper portion in FIG. 21 is the main body 30 as shown in FIG. 23). Circumferential direction, the lower side is the implant body 2
0 length direction), and a cylindrical shape having a screw 33b below the slit portion 32 as shown in FIG.
A gap 34 through which a push-up body 33 provided with a push-up protrusion 33a having a rising gradient extending from the most protruding end to the inside in a 180-degree symmetrical arrangement from the outer periphery thereof can be inserted (the gap 34 cuts one side of the slit 32 to a large extent) The screw 33 of the push-up body 33 inserted from the upper part of the main body 30 into the gap portion 34 with respect to the cylindrical implant main body 30 provided with
It is configured by inserting the expanding screw body 35 while screwing it into b.

Then, the spreading screw body 35 is rotated to raise the push-up body 33, and the lifting force of the push-up projection 33 a of the push-up body 33 is applied to the inner peripheral side of the area surrounded by the slit 32. As shown in FIG. 21, the upper side is an arbitrary number of bulging portions 36A bulging in the circumferential direction of the main body 30, and the lower side is obliquely downward in the longitudinal direction of the main body 30. The bulging portion 36B bulges to form the implant body 1B.

As in the case of the implant bodies 1 and 1A of the third and fourth embodiments, the upper end 30
A sealing portion 70 having the same configuration as that of the third embodiment is provided on the joining surfaces 35d and 30f between the locking step portions 30e with the head portion 35a of the expanding screw body 35 provided inside d. still,
About the structure of the seal part 70 similar to Embodiment 4, specific description and illustration are abbreviate | omitted.

FIG. 23 and FIG.
This figure shows the shape of the bulging portion 36A formed by bulging in the circumferential direction of the bulging portion. The bulging portion 36A has a thick upper portion and is obliquely upward from the lowermost end on the inner peripheral side thereof. Has a ridge line 37 protruding most laterally toward the upper side, and when the push-up convex portion 33a of the push-up body 33 rises,
The swelling portion 36A is swelled in the circumferential direction such that the inclined surface of the push-up protrusion 33a always contacts the ridge line 37.

When using the implants 1A and 1B of the fourth and fifth embodiments, similarly to the third embodiment, the implants 1A and 1B are replaced with the implant 1 of FIG.
It is used by implanting the implant body 1A or 1B, and is not shown.

Further, the bulging portions 4a, 4b, 5a, 5b, 6 of the implant bodies 1, 1A, 1B of the third to fifth embodiments.
The a, 27, 36A, 36B can be implemented while being arranged so as to swell at any position between the lengths of the implant bodies 2, 20, 30 as necessary, and the swelling direction. Can also be arbitrarily designed.

For example, FIG. 26 shows two implants 1
An implant body 1 having upward swelling portions 5a, 5b and downward swelling portions 6a, 6b.
Are implanted in the extraction cavity 15 while adjusting the positions of the bulging portions 5a, 5b and the bulging portions 6a, 6b adjacent to each other, so that they do not interfere with each other.
Can be planted at high density.

Further, by bulging the bulging portions 4a, 4b, 5a, 5b from an arbitrary portion of the implant body 1, the implant body 1 is embedded in the unstable extraction socket 16 as shown in FIG. be able to.

According to the third to fifth embodiments described above,
The implant body 1 can be implanted in the extraction socket, and the number of indications for the implant body 1 can be dramatically increased as described below. That is, the jaw bone is slightly distorted by the force from the teeth during normal mastication, and a minute electric potential is generated in the jaw bone. The calcium ions in the blood are attracted to this potential, and the calcium component is supplied to the alveolar bone.

In the conventional implant body, it was necessary to wait until the extraction socket was completely closed, but during this time, a sufficient calcium component was not supplied to the jaw bone at the extraction site. In addition, the jaw bone becomes thin and fragile because the surrounding bone components try to fill the extraction socket, and about 80% of cases where implants cannot be implanted in the upper jaw and 30% in the lower jaw when treating implants. It was the biggest neck.

Further, the implant body 1, 1A, 1
Even if B is planted, the bulging portions 4a and the like can be provided on the upper and lower portions of the implant bodies 1, 1A, 1B, so that the hole for embedding does not have to be a perfect circle. 1, 1A, 1B can be implanted in the jaw bone and / or the alveolar bone.

Therefore, the cases where the implants 1, 1A, 1B are incompatible are extremely limited. The extraction socket is irregular in shape and therefore it is not possible to implant a conventional non-expandable implant body. In addition, the conventional expandable implant was impossible because only the lower part of the implant was expanded. According to the present embodiment, each part of the implant body 1, 1A, 1B can be swelled, so that the implant body 1, 1A, 1B can be embedded in the irregular extraction socket.

At present, there are only a very limited number of operators who handle implants. The main reason for this is that a sophisticated technique of making a hole in the jaw bone is required. Unless careful attention is paid to the depth and direction of the hole, a situation may occur immediately which may lead to a medical accident. It is possible to easily and safely implant the implant bodies 1, 1A, 1B.

Further, the implant bodies 1, 1A, 1
According to B, since the bulging portion can be supported at a plurality of locations in the extraction socket, the bending moment acting on the implant bodies 1, 1A, 1B is also stronger than in the case of the conventional example.

In the third to fifth embodiments, the expanding screw body 1 as the expanding member for expanding the implant main body 20 and a required portion of the implant main body 20 outward.
Implant body 1, 1 composed of 0, 25, 35
In A and 1B, especially, the joint surfaces 11d, 25d of the heads 11a, 25a, 35a of the expanding screw bodies 10, 25, 35 and the locking steps 2e, 20e, 30e of the implant body 20 for locking the heads 11a, 25a, 35a. By forming the seal portions 70 on the surfaces 35d, 25, 20f, and 30f, it is possible to prevent bacteria and the like from entering the implant bodies 2, 20, and 30 from the outside.

In the above-described third to fifth embodiments,
Spreading screw body 10 in implant body 2, 20, 30
Insert 25, 35 and implant body 2, 20, 30
The structure of the seal portion 70 when the structure of expanding the required portion outward is specifically shown. However, the structure of the seal portion 70 is described in detail with respect to the implant body and the required portion of the implant body. The present invention can be applied to all of the embodiments that are applied to the implant body including the expanding member that expands the outside, and is not limited to the above-described third to fifth embodiments.

Further, the implant bodies 1, 1A, 1B
Does not specifically describe the case of supporting a structure on a dental technic. However, when attaching a structure such as a denture on a dental technic, a mounting portion necessary for mounting the structure is not provided. (Not shown) was changed to each of Embodiments 3 to 5 of the above embodiments.
Of the implants 1, 1A, and 1B, or the holder of the structure is connected to the upper end of each of the implants 1, 1A, and 1B.

(Sixth Embodiment) FIGS. 28 to 32 show a sixth embodiment.

However, Embodiment 6 of the present embodiment is an embodiment in which the screw portion 2a is not formed instead of providing the screw portion 2a on the outer periphery of the implant body 2 in the structure of the implant body 1 in Embodiment 3. It shows the form of.

Therefore, the configuration other than the configuration in which the screw portion 2a is not formed on the outer periphery of the implant body 2 is the same as that of the third embodiment.

Since the operation and effect are the same except that the screw portion 2a is not provided, the same components are denoted by the same reference numerals and detailed description thereof will be omitted. The configuration of the seal portion 70 in FIGS. 10 to 15 of the third embodiment is also omitted.

(Embodiments 7 and 8) FIGS. 33 to 41 show Embodiments 7 and 8, corresponding to Embodiment 6, in which no thread is formed on the outer periphery of the implant bodies 20 and 30. This shows the form, and the specific configuration is shown in FIGS.
Since the configuration is completely the same as that of the fifth and fourth embodiments, the same components in the drawings are denoted by the same reference numerals, and detailed description is omitted.

In the implant bodies 1A and 1B according to the fourth and fifth embodiments, the implant bodies 1A and 1B according to the fourth embodiment in FIGS. 16 to 20 and the fifth embodiment in FIGS. The implant bodies 20 and 30 of 1B are provided with screw portions 21 and 31 on the outer periphery in the same manner as the implant body 2 of the third embodiment, so that the jaw bone and / or
And the case where the adhesion to the alveolar bone is enhanced and the force due to the mastication from above can be dispersed.

Therefore, the fourth and fifth embodiments shown in FIGS.
Implant body 1A, 1B implant body 20,
17 to 2 corresponding to the sixth embodiment shown in FIGS. 28 to 32 in place of those provided with 30 screw portions 21 and 31.
Threads 21 on the outer periphery of the implant bodies 20 and 30
Embodiment 7 is described as being capable of implementation without 31.
8 which can be implemented by the configuration of FIGS.

Also, in the seventh and eighth embodiments, similarly to the fourth and fifth embodiments, the sealing portion 70 allows bacteria and the like to enter the implant bodies 20, 30 in the implanted state of the implant bodies 20, 30. Can be prevented from entering.

FIGS. 42 and 43 illustrate the use examples of the sixth to eighth embodiments. The description of the use is similar to that of FIGS. 26 and 27 showing the use examples of the third to fifth embodiments. , And the description is omitted.

In the implants according to the third to seventh embodiments, an implant having the following features can be obtained.

The implant body comprises a cylindrical implant body and an expanding member, and the implant body has a plurality of expanding portions arranged at required portions in the length direction. An implant body characterized in that a plurality of expanded portions of an implant main body can be expanded radially outward.

Each of the expanding portions of the implant main body is formed so as to be able to expand radially outward through a slit portion, and the expanding member is provided with the expanding member inserted in the axial direction of the implant main body. A projecting portion formed in an open screw body and protruding at a position opposed to each expanding portion of the implant main body in the length direction of the expanding screw main body, and the expanding screw main body is connected to the implant main body. An implant body characterized in that by rotating by a required angle about the axis of each of the projecting portions, each projecting portion of the implant body facing each of the projecting portions can be spread outward.

Each of the expanded portions of the implant body is provided with an expanded portion that expands in a radial direction of the implant body and / or in a direction orthogonal to an axial direction of the implant body. body.

The implant body is characterized in that the implant main body is formed by projecting a screw portion on the entire outer periphery or a required portion.

In the expanding screw body, a screw portion is screwed on the outer periphery, a gap is provided in a required portion of the implant body, and a screw portion to be screwed with the screw portion of the expanding screw body is provided. After the push-up body provided is inserted into the gap, the expanding screw body is rotatably inserted into the axis of the implant body, and the screw portion of the push-up body inserted into the gap is formed by the expansion screw body. The push-up body is screwed up along with the screw portion of the expansion screw body and rises by rotating the expansion screw body, so that the push-up body is raised at a required position of the implant body. An implant body characterized in that the opening can be expanded outward.

[0111] The implant main body has a locking step of the head of the expanding screw body, and the implant main body is placed between the locking step and the joining surface of the head when the implant body is erected. An implant body comprising a seal portion for preventing bacteria and the like from entering the inside of the implant body.

[0112] The implant body, wherein the seal portion is formed by interposing a seal member between joining surfaces other than the joining surfaces where the expanding screw body and the implant body are joined.

The seal portion is characterized in that a seal member is fitted in an annular groove provided at an arbitrary position between the joint surface between the outer periphery of the expanding screw body and the inner periphery of the implant body. Implant body.

[0114]

According to the present invention described above, by constructing the implant body so that the required portion of the implant body can be spread outward, the strength of the implant body can be increased immediately after planting compared to the conventional implant body. The present invention can exert a strong holding force, enable the same day's treatment of the structure on dental technics, prevent the jaw bone and / or the alveolar bone from thinning, and, in the implanted state of the implant body, Since the seal portion for preventing the invasion of bacteria is provided inside the body, it is possible to provide an implant body capable of preventing the growth of bacteria inside the implant body.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a main part of an implant body according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged sectional view showing a main part of the implant main body according to the first embodiment of the present invention.

FIG. 3 is an enlarged sectional view showing a main part of an implant body according to a second embodiment of the present invention.

FIG. 4 is an enlarged sectional view showing a main part of an implant body according to a second embodiment of the present invention.

FIG. 5 is a front view showing an implant body according to a third embodiment of the present invention.

FIG. 6 is an explanatory view showing a direction of a slit portion in an implant body according to a third embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a processed state of an implant main body according to Embodiment 3 of the present invention.

FIG. 8 is a perspective view showing a spread screw body of an implant body according to a third embodiment of the present invention.

FIG. 9 is an explanatory view showing a step of expanding an implant body according to the third embodiment of the present invention.

FIG. 10 is an enlarged sectional view showing a main part of a seal portion in an implant body according to a third embodiment of the present invention.

FIG. 11 is an enlarged sectional view showing a main part of a seal part in an implant body according to a third embodiment of the present invention.

FIG. 12 is an enlarged sectional view showing a main part of a seal portion in an implant body according to a third embodiment of the present invention.

FIG. 13 is an enlarged sectional view showing a main part of a seal portion in an implant body according to a third embodiment of the present invention.

FIG. 14 is an enlarged sectional view showing a main part of a seal portion in an implant body according to a third embodiment of the present invention.

FIG. 15 is an enlarged sectional view showing a main part of a seal portion in an implant body according to a third embodiment of the present invention.

FIG. 16 is an explanatory diagram showing a use state of the implant body according to the third embodiment of the present invention.

FIG. 17 is a sectional view showing an implant body according to a fourth embodiment of the present invention.

FIG. 18 is a cross-sectional view showing an expanded state of an implant main body according to Embodiment 4 of the present invention.

FIG. 19 is an explanatory view showing the operation of the bulging convex portion of the implant body according to the fourth embodiment of the present invention.

FIG. 20 is an explanatory view showing another example of the bulging projection of the implant body according to the fourth embodiment of the present invention.

FIG. 21 is a sectional view showing an implant body according to a fifth embodiment of the present invention.

FIG. 22 is a sectional view showing an expanded state of an implant main body according to the fifth embodiment of the present invention.

FIG. 23 is a partial perspective view showing a bulging portion of the implant main body according to the fifth embodiment.

FIG. 24 is an enlarged view of a bulging portion of the implant main body according to the fifth embodiment.

FIG. 25 is a perspective view showing a push-up body of the implant main body according to the fifth embodiment.

FIG. 26 is a schematic view showing a usage example of the implant bodies according to the third to fifth embodiments of the present invention.

FIG. 27 is a schematic view showing another example of use of the implant according to the third to fifth embodiments of the present invention.

FIG. 28 is a front view showing an implant body according to a sixth embodiment of the present invention.

FIG. 29 is an explanatory diagram showing a direction of a slit portion in the implant main body according to the sixth embodiment of the present invention.

FIG. 30 is an explanatory diagram showing a processed state of an implant main body according to the sixth embodiment of the present invention.

FIG. 31 is a perspective view showing a spread screw body of an implant body according to a sixth embodiment of the present invention.

FIG. 32 is an explanatory view showing a step of expanding the implant main body according to the sixth embodiment of the present invention.

FIG. 33 is a sectional view of an implant body according to a seventh embodiment of the present invention.

FIG. 34 is a sectional view showing an expanded state of an implant body according to a seventh embodiment of the present invention.

FIG. 35 is an explanatory view showing the operation of the bulging projection of the implant body according to the seventh embodiment of the present invention.

FIG. 36 is an explanatory view showing another example of the bulging convex portion of the implant main body according to the seventh embodiment.

FIG. 37 is a sectional view showing an implant body according to an eighth embodiment of the present invention.

FIG. 38 is a cross-sectional view showing an expanded state of an implant main body according to Embodiment 8 of the present invention.

FIG. 39 is a partial perspective view showing a bulged portion of an implant body according to an eighth embodiment of the present invention.

FIG. 40 is an enlarged view of a bulged portion of an implant body according to an eighth embodiment of the present invention.

FIG. 41 is a perspective view showing a push-up body of an implant body according to an eighth embodiment of the present invention.

FIG. 42 is a schematic view showing a usage example of the implant bodies according to the sixth to eighth embodiments of the present invention.

FIG. 43 is a schematic view showing another example of use of the implant according to the sixth to eighth embodiments of the present invention.

FIG. 44 is a sectional view showing an embodiment of a conventional implant body.

FIG. 45 is a sectional view taken along the line AA of FIG. 44 showing an embodiment of a conventional implant body.

FIG. 46 is a cross-sectional view showing an embodiment of a conventional implant body.

FIG. 47 is a cross-sectional view showing an embodiment of a conventional implant body.

FIG. 48 is a sectional view showing an embodiment of a conventional implant body.

FIG. 49 is an explanatory view of use of the implant body of FIGS. 47 and 48.

[Explanation of symbols]

1, 1A, 1B, 40, 57 Implant body 2, 20, 30, 43 Implant body 2a, 21, 30 Screw part 2d, 20d, 30d Upper end part 2e, 20e, 30e of implant body Locking step 2f Joint surface 2g Corners 3, 22, 32 Slits 4a, 4b, 5a, 5b, 6a, 6b, 27, 36A,
36B Swelling portion 7a, 7b, 7c Hole 8 Tapered portion 10, 25, 35 Spreading screw body 11a, 25a, 35a Head of spreading screw body 11b Convex portion of spreading screw body 11c Step of spreading screw body 11d Inner end face (joint surface) of the head of the expanding screw body 11e Groove of the expanding screw body 11f Lower end of the expanding screw body 11g Main body of the expanding screw body 11h Base of the expanding screw body 11i Chamfering the expanding screw body Part 14 Seal part 15, 16 Extraction fossa 17 Alveolar bone 18, 62 Denture 19 Holder part 20a Drilled hole 23 Receiving convex part 24 Swelling convex part 24a Screw part 25b Shaft part 28 Through hole 29 Pin 30 Wave washer 33 Push-up body 33a Push-up Convex portion 33b Screw 34 Gap portion 37 Ridge line 41 Base portion 42 Holder portion 44 Expanding piece 45 Connecting portion 46 Operating member 47 Projecting portion 48 Cam 49 Cam surface 50 Cylindrical portion DESCRIPTION OF SYMBOLS 1 Round bar-shaped main body 52 Nut 53 Screw part 54 Slit 55 Locking step part 56 Head 58 Main body 59 Base part 60 Jaw bone 61 Planting part 70 Seal part 71, 72, 74, 75, 76, 77, 78, 79 annular groove 72 O-ring 80, 81, 82, 83 Inclined joint surface 84 Drop-in groove

Claims (3)

[Claims] 1. An implant body capable of expanding a required portion of an implant main body that supports a structure on a dental technician to the outside, and wherein the implant main body is erected in an implanted state. An implant body provided with a seal portion for preventing invasion of bacteria and the like from the support side of the structure into the interior of the implant body, wherein the seal portion is configured by interposing a seal member. body. 2. The sealing part is configured by interposing a sealing member at an operating member for expanding a required portion of the implant body outward or a joint part at which an expanding screw body and the implant body are joined. Claim 1 characterized by the following:
The implant body according to any one of the preceding claims. 3. The seal member according to claim 1, wherein the seal portion is formed by interposing a seal member between a joint surface between an outer periphery of the operating member or the expanding screw body and an inner periphery of the implant body. The implant body according to any one of the preceding claims.