JP2019217180A - Artificial tooth structure and filler for the same - Google Patents

Abstract

To provide an artificial tooth structure in which the bacterial breeding in the through-hole of an artificial crown is suppressed and can be checked easily.SOLUTION: An artificial tooth structure includes: an implant body embedded to an alveolar bone; an abutment mounted to the implant; an artificial crown covered on the abutment, and having a through-hole extending toward the abutment; a fastening member inserted into the through-hole in order to fasten the artificial crown to the abutment or the implant body; a lid for closing an opening side portion of the through-hole; and a filler comprising synthetic resin having toughness more than the lid, and arranged therein so as to satisfy an inside space between the lid and the fastening member in the through-hole.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an artificial tooth structure provided with an implant body, which is mounted in the oral cavity by embedding the implant body in alveolar bone, and a filler for the artificial tooth structure.

  One method of artificially regenerating a tooth when a root is missing is implant treatment. Implant treatment is a method of regenerating a tooth using an artificial tooth structure. More specifically, the artificial tooth structure includes an implant body, an abutment, and an artificial crown. First, the implant body is embedded in the alveolar bone. Next, an abutment is attached to the implant body, and the abutment is fixed with an artificial crown over the abutment. As a fixing method, for example, there is a screw fixing method. In the screw fixing method, the artificial crown is fastened to the abutment as follows. That is, an access hole that is a through hole is formed in the artificial crown. The access hole is formed so as to penetrate the artificial crown in the vertical direction, and a screw serving as a fastening member is inserted therein. The access hole is formed such that the lower opening faces the abutment, and the inserted screw is screwed into the abutment. As a result, the artificial crown is fastened to the abutment, and the artificial crown is thereby fixed to the implant body. As an artificial tooth structure having such a structure, for example, there is an artificial tooth structure as described in FIG.

JP 2012-29879 A

  When an access hole is formed in an artificial crown like the artificial tooth structure of Patent Literature 1, food or the like may enter the access hole. In order to prevent such a situation, a lid is formed on the opening on the upper side of the access hole. That is, a composite resin is injected into the opening side portion, and is cured to form a lid, thereby closing the opening side portion. Thereby, food can be prevented from entering the access hole, and the aesthetics of the artificial tooth structure can be enhanced. On the other hand, when the access hole is covered, the following situation occurs.

  That is, in the artificial tooth structure, the artificial crown may come off from the abutment due to loosening of the screw or the like, and the loosening or the like is periodically inspected for looseness. At that time, the lid needs to be removed, and the lid is removed using a tool such as a drill. However, the lid is formed mainly in consideration of closing the opening side portion and ease of removal at the time of inspection, and the lid is formed only in the opening side portion. Therefore, the access hole has an inner space formed between the lid and the screw. In the inner space, although the upper opening side portion is closed, a gap is generated due to aging of the lid, micro movement, and the like. It is conceivable that bacteria and the like enter the inner space from the gap, and the entered bacteria propagate in the inner space.

  The following can be considered as a countermeasure for suppressing such bacterial growth. That is, the entire access hole is filled with a composite resin to fill the inner space, thereby suppressing the growth of bacteria. In the case of this method, it is necessary to remove the cured composite resin at the time of inspection with a tool such as a drill. However, the inner space is formed deep under the access hole and under night vision such as in the oral cavity. Therefore, the visibility of the composite resin formed in the inner space is poor, and uncut portions may be left. When the uncut portion is left, the screw cannot be turned and the loosening of the screw cannot be eliminated. On the other hand, if the uncut portion is not generated, the screw may be erroneously cut at the time of shaving, and the screw may be broken.

  Therefore, an object of the present invention is to provide an artificial tooth structure that can suppress the growth of bacteria in a through hole of an artificial crown and that can be easily inspected.

  An artificial tooth structure of the present invention is an artificial tooth having an implant buried in alveolar bone, an abutment attached to the implant, and a through-hole covered by the abutment and extending toward the abutment. A fastening member that is inserted into the through hole to fasten the artificial crown to the abutment or the implant body, a lid that closes an opening side portion of the through hole, and a synthetic resin that is tougher than the lid. And a filler disposed therein so as to fill an inner space between the lid and the fastening member in the through hole.

  According to the present invention, since the inner space is filled with the filler, the inner space can be set to an environment unsuitable for the growth of bacteria, and the growth of bacteria can be suppressed. Further, since the filler has toughness, the filler can be taken out as one lump by picking the filler when taking out the filler from the inner space. That is, after the lid is scraped off with a tool such as a drill, the filler can be removed from the inner space at a stretch. Therefore, at the time of inspection, the filler can be easily removed, and inspection can be easily performed.

  In the above invention, it is preferable that the filler is made of a non-water-absorbing material. According to the above configuration, it is possible to suppress the growth of bacteria in the filling body.

  In the above invention, the filler preferably contains an antibacterial agent. According to the above configuration, even if bacteria enter the inner space, the proliferation of bacteria can be further suppressed by the antibacterial agent in the filler.

  In the above invention, it is preferable that the filler is made of a curable material that can be cured after filling the inner space with a filler having fluidity.

  According to the above configuration, since the inner space can be filled with the filler by filling the inner space with the filler, the formation of the filler is easy. In addition, since the filler has fluidity, the filler can enter the gap, and the inner space can be more densely filled with the filler. Thereby, the internal space can be made an environment more unsuitable for the growth of bacteria, and the growth of bacteria can be suppressed.

  The artificial tooth structure of the present invention has an implant body embedded in alveolar bone, an inner hole extending toward the implant body, an abutment attached to the implant body, and an abutment covered with the abutment. An artificial crown for closing one opening of the inner hole, a fastening member inserted into the inner hole to fasten the abutment to the implant body, and a synthetic resin having toughness than the lid, and And a filler disposed therein so as to fill an inner space between the one opening in the hole and the fastening member.

  According to the present invention, since the inner space is filled with the filler, the inner space can be set to an environment unsuitable for the growth of bacteria, and the growth of bacteria can be suppressed. Further, since the filler has toughness, the filler can be taken out as one lump by picking the filler when taking out the filler from the inner space. That is, after the lid is scraped off with a tool such as a drill, the filler can be removed from the inner space at a stretch. Therefore, at the time of inspection, the filler can be easily removed, and inspection can be easily performed.

  The filling body for an artificial tooth structure of the present invention includes an implant body embedded in alveolar bone, an abutment attached to the implant body, and a through-hole that covers the abutment and extends toward the abutment. An artificial crown having the same, a fastening member inserted into the through hole to fasten the artificial crown to the abutment or the implant body, and a lid for closing an opening side portion of the through hole. The lid is made of a synthetic resin having a higher toughness than the lid, and is disposed therein so as to fill an inner space between the lid and the fastening member in the through hole.

  According to the present invention, since the inner space is filled with the filler, the inner space can be set to an environment unsuitable for the growth of bacteria, and the growth of bacteria can be suppressed. Further, since the filler has toughness, the filler can be taken out as one lump by picking the filler when taking out the filler from the inner space. That is, after the lid is scraped off with a tool such as a drill, the filler can be removed from the inner space at a stretch. Therefore, it can be easily removed at the time of inspection, and inspection can be easily performed.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing the proliferation of bacteria in the through-hole of an artificial crown, it can be easily checked.

It is a sectional view showing an artificial tooth structure concerning a 1st embodiment of the present invention. FIG. 2 is an exploded view showing the artificial tooth structure of FIG. 1 in an exploded manner. It is a figure which shows the attachment procedure of the artificial tooth structure of FIG. 1, (a) is a figure which shows the state which embedded the implant body in the alveolar bone, (b) is a figure which shows the abutment in the implant body of (a). It is a figure showing the state where it attached. It is a figure which shows the attachment procedure of the artificial tooth structure of FIG. 1, (a) is a figure which shows the state which put the artificial tooth crown on the abutment of FIG.3 (b), (b) of (a) It is a figure which shows the state which inserted the filling body into the through-hole of the artificial crown. It is sectional drawing which shows the artificial tooth structure of 2nd Embodiment of this invention. It is sectional drawing which shows the artificial tooth structure of 3rd Embodiment of this invention.

  Hereinafter, the artificial tooth structures 1, 1A, and 1B according to the first to third embodiments of the present invention will be described with reference to the drawings described above. The concept of the direction used in the following description is used for convenience in the description, and does not limit the direction of the configuration of the invention to the direction. Further, the artificial tooth structures 1, 1A, 1B described below are merely an embodiment of the present invention. Therefore, the present invention is not limited to the embodiments, and can be added, deleted, or changed without departing from the spirit of the invention.

[First Embodiment]
<Artificial tooth structure>
One method for artificially regenerating a tooth when a tooth root is lost is implant treatment. In the implant treatment, for example, an artificial tooth structure 1 as shown in FIG. 1 is used. The artificial tooth structure 1 is an artificial tooth created by imitating a so-called naturally occurring tooth (that is, a natural tooth), and a part of the artificial tooth is used as an alveolar bone (for example, a lower alveolar bone) 2. It is embedded and attached in the oral cavity. More specifically, an implant cavity 3 is previously formed in the alveolar bone 2 by a drill or the like (not shown) (see FIG. 2), and the artificial tooth structure 1 is partially embedded in the implant cavity 3 and embedded therein. . The artificial tooth structure 1 attached in this manner includes an implant body 11, an abutment 12, an artificial crown 13, and an occlusal screw 14, as shown in FIG.

  The implant body 11 is formed in a substantially cylindrical shape with a bottom and is made of, for example, a metal such as titanium and a titanium alloy, a ceramic, or a synthetic resin such as PEEK. The implant body 11 has a male screw formed on the outer peripheral surface thereof, and is inserted so as to be screwed into the implant cavity 3 described above. That is, the implant body 11 is embedded so as to be screwed into the alveolar bone 2. That is, the implant body 11 is first embedded in the implant cavity 3. After the implantation, the implant body 11 is connected to the alveolar bone 2 by waiting until the alveolar bone 2 around the implant body 11 and the gingiva 4 around the implant body are healed and stabilized (for example, 3 to 16 weeks). . In this manner, the implant body 11 is embedded in the alveolar bone 2 by being embedded in the implant fossa 3 and coupled to the alveolar bone 2. The implant body 11 buried in this way has a screw hole 11a, and the screw hole 11a of the implant body 11 is formed as follows. That is, a female screw is formed in the screw hole 11a of the implant body 11 except for the opening side portion 11b, and the opening side portion 11b is formed in a tapered shape so as to increase in diameter toward the opening end. I have. The abutment 12 is attached to the implant body 11 thus formed after embedding.

  The abutment 12 is made of, for example, a metal such as titanium and a titanium alloy, a ceramic, or a synthetic resin such as PEEK, and has an abutment main body 21 and an abutment screw 22. The abutment main body 21 is formed in a substantially cylindrical shape, and has a flange 21a at an axially intermediate portion of an outer peripheral surface thereof. The flange 21a is formed over the entire circumference in the intermediate portion, and protrudes radially outward with respect to the remaining portion. Both upper and lower end portions 21b and 21c of the abutment main body 21 are both tapered toward the opening end. That is, the upper end portion 21b which is one end portion is formed in a substantially truncated cone shape, and the lower end portion 21c which is the other end portion is formed in a substantially inverted truncated cone shape.

  More specifically, the lower end portion 21c is formed according to the shape of the opening side portion 11b of the implant body 11, and fits into the opening side portion 11b of the implant body 11. The abutment body 21 having such a shape is placed on the upper end of the implant body 11 with the lower end portion 21c fitted in the opening side portion 11b. Further, the abutment body 21 has an inner hole 21d, and an abutment screw 22 is inserted into the inner hole 21d.

  The abutment screw 22 is formed in a substantially columnar shape, and a male screw 22a is formed on an outer peripheral surface thereof at an axially intermediate portion. A head 22b is formed at one end of the abutment screw 22, and the head 22b is formed to have a larger diameter than the remaining part. Furthermore, a hexagonal hole 22c is formed in the head 22b along the axis of the abutment screw 22, so that a hexagon wrench (not shown) or the like can be inserted to turn the abutment screw 22.

  The abutment screw 22 having such a shape is inserted into the inner hole 21d of the abutment main body 21, and the male screw 22a projects from the abutment main body 21 and is screwed into the screw hole 11a of the implant body 11. . The inner hole 21d of the abutment main body 21 is formed to have a larger diameter at the upper end side than the remaining part according to the shape of the abutment screw 22. Therefore, a seat portion 21e is formed between the remaining portion of the abutment body 21 and the upper end portion, and the head 22b of the abutment screw 22 is seated on the seat portion 21e. As a result, the abutment body 21 is sandwiched between the abutment screw 22 and the implant body 11, and the abutment 12 is fastened to the implant body 11. The artificial crown 13 is attached to the abutment 12 attached in this manner so as to cover it.

  The artificial crown 13 is created by imitating the crown of a so-called naturally-occurring tooth (that is, a natural tooth). There is a zirconia crown and the like. The artificial crown 13 is formed in consideration of a gap between adjacent teeth and an occlusal engagement with an opposing tooth. The thus formed artificial crown 13 has a recess 13a at the lower end thereof. The concave portion 13a is formed in a substantially inverted truncated cone shape, and the upper end portion 21b of the abutment main body 21 is accommodated therein. The artificial crown 13 configured as described above is placed on the abutment 12 such that the upper end portion 21b is accommodated in the recess 13a and the outer peripheral edge of the lower end is placed on the flange 21a of the abutment body 21. The artificial crown 13 has a through hole 13b. The through hole 13b vertically passes through the artificial crown 13 from the end face of the artificial crown 13, that is, the occlusal surface to the recess 13a, and the occlusal screw 14 is inserted into the through hole 13b.

  The occlusion screw 14, which is a fastening member, is a screw having a head 14a, and can be entirely inserted into the through hole 13b. In the through hole 13b, a portion connected to the recess 13a has a smaller diameter than the remaining portion, that is, a small diameter portion 13c is formed in a portion connected to the recess 13a. The hole diameter of the small diameter portion 13c is smaller than the outer diameter of the head portion 14a. When the occlusion screw 14 is inserted into the through hole 13b, the head portion 14a of the occlusion screw 14 sits on the small diameter portion 13c.

  On the other hand, the outer diameter of the tip portion of the occlusion screw 14 is smaller than the hole diameter of the small diameter portion 13c, and the tip portion protrudes from the through hole 13b to the recess 13a. The occlusion screw 14 has a male screw formed on the outer periphery of the remaining portion excluding the head portion 14a, and the abutment screw 22 has a female screw portion 22d corresponding to the tip of the occlusion screw 14. ing. The female screw portion 22d is formed to extend further from the hexagonal hole 22c to the tip side along the axis of the abutment screw 22. The distal end portion of the occlusion screw 14 protruding into the recess 13a is screwed into the female screw portion 22d formed in this manner. The occlusion screw 14 screwed in this way has its head 14a seated on the small diameter portion 13c of the through hole 13b, and by being seated, the artificial crown 13 is sandwiched between the occlusion screw 14 and the abutment 12. Have been. As a result, the artificial crown 13 is fastened and attached to the abutment 12.

  In the artificial tooth structure 1 configured as described above, the through-hole 13b is formed in the artificial crown 13 as described above, and is configured as described below so that food and the like do not enter therein. That is, a synthetic resin such as a composite resin is injected into the through-hole 13b on the opening side thereof, and the lid 15 is formed on the opening side of the through-hole 13b. As a result, it is possible to prevent food or the like from entering the through-hole 13b and closing the through-hole 13b. On the other hand, the inner space 30 is formed between the lid 15 and the occlusal screw 14 by forming the lid 15 on the opening side portion of the through hole 13b. Although the inner space 30 is closed by the lid 15, various gaps occur due to aging and the like and micro-movement, so that the inner space 30 cannot always be cut off from the outer space. Therefore, it is conceivable that bacteria may enter the inner space 30 and propagate through the above-mentioned gap. Therefore, in order to prevent the invading bacteria from growing in the inner space 30, the inner space 30 is filled with the filler 16 in the artificial tooth structure 1.

  The filler 16 for the artificial tooth structure is made of, for example, silicone (silicone-based impression material) used as an impression material, or a synthetic resin for forming a dental polymer temporary sealing material, and has a higher toughness than the lid 15. Made of synthetic resin. That is, the filling body 16 is configured by filling the inner space 30 with the filler. More specifically, the filler comprises a curable material that cures by kneading the two materials. For example, as the filler, a fluid synthetic resin that can be cured in a short time (for example, about 2 to 6 minutes) by mixing a base material (base) and a curing agent (catalyst) is used. Is filled into the inner space 30 using the filling device described in (1). That is, in the filling device, the main agent and the curing agent are respectively filled in separate cartridges, and each of the main agent and the curing agent is extruded from the cartridge to a mixing chip and kneaded. After kneading, the filler composed of the main agent and the curing agent is filled into the inner space 30 from the opening side portion of the through hole 13b via the nozzle attached to the tip of the mixing chip. By filling with such a filling device, it is easy to densely fill the filler even in a small hole such as the through hole 13b.

  After the inner space 30 is filled with the filler in this way, the filler is hardened while being left as it is, and the solid filler 16 is formed in the inner space 30. By curing the filler in the inner space 30 to form the solid filler 16 in the inner space 30, the inner space 30 can be filled with the filler 16. In addition, by filling the inner space 30 with the filler 16, it is possible to prevent moisture or the like necessary for bacteria to propagate into the inner space 30. That is, the inner space 30 can be set to an environment unsuitable for the propagation of bacteria, and the propagation of bacteria can be suppressed. Further, the filling of the inner space 30 with the filler 16 can also suppress the loosening of the occlusal screw 14.

<Installation example of artificial tooth structure>
Hereinafter, a method of attaching the artificial tooth structure 1 configured as described above will be briefly described with reference to FIGS. When attaching the artificial tooth structure 1 to the alveolar bone 2, first, an implant cavity 3 is formed in the alveolar bone 2 by a drill or the like (not shown) (see FIG. 2). When the implant cavity 3 is formed, the implant body 11 is inserted into the implant cavity 3 while being screwed into the implant cavity 3 (see FIG. 3A). After the implantation, the implant body 11 waits until the alveolar bone 2 around the implant body 11 and the gingiva 4 around the periphery are healed and stabilized. Thereby, the implant body 11 is connected to the alveolar bone 2, that is, is embedded. After embedding, the abutment body 21 is placed on the implant body 11, and the abutment screw 22 is inserted into the inner hole 21 d of the abutment body 21. Further, the male screw 22a of the abutment screw 22 is screwed into the screw hole 11a of the implant body 11, and the abutment screw 22 is turned until the head 22b is seated on the seat 21e. As a result, the abutment body 21 is fastened to the implant body 11, and the abutment 12 is attached to the implant body 11 (see FIG. 3B).

  Further, the artificial crown 13 is put on the abutment 12, and the occlusion screw 14 is inserted into the through hole 13b. The tip portion of the inserted occlusion screw 14 is passed through the small-diameter portion 13c of the through hole 13b and screwed into the female screw portion 22d of the abutment screw 22. Further, the occlusal screw 14 is turned until its head 14a is seated on the small diameter portion 13c of the through hole 13b. Thereby, the artificial crown 13 is fastened and attached to the abutment 12, that is, the artificial crown 13 is attached to the implant body 11 via the abutment 12 by the occlusal screw 14 (see FIG. 4A). After the attachment, the filler is injected into the through hole 13b of the artificial crown 13 using, for example, the above-described filling device. At this time, the filler is filled except for the opening side portion of the through hole 13b (for example, a portion excluding a range of about 1 mm or more and 3 mm or less from the opening end), that is, the entire inner space 30 is filled. After a short time after the filling, the resin is cured to form the filling body 16 (see FIG. 4B). After the curing, the composite resin is filled on the opening side of the through hole 13b, that is, on the filling body 16. As this composite resin, for example, a photopolymerization type resin is used. When light such as ultraviolet rays is applied after filling, the resin cures to form the lid 15 (see FIG. 1). In this way, the composite resin is cured to become the lid 15, so that the through-hole 13b is closed while the inner space 30 is filled with the filler 16.

  In the artificial tooth structure 1 configured as described above, the inner peripheral surface of the artificial crown 13 is configured as follows. That is, the inner peripheral surface of the artificial crown 13 is polished so as not to have irregularities, but the surface roughness of the opening side portion is larger than that of the remaining portion due to reasons such as processing of the occlusal surface. Therefore, at the opening side portion of the inner peripheral surface, the composite resin can be cured in a state where it enters the minute irregularities of the inner peripheral surface, and the lid 15 is not hooked on the irregularities and does not come off from the artificial crown 13. You can do so. On the other hand, the portion where the filler 16 is formed on the inner peripheral surface of the artificial crown 13 is polished so as to have a small surface roughness as described above, that is, has no irregularities, and the portion is hardly caught. Therefore, the filler 16 can be taken out from the through hole 13b so as to slide on the inner peripheral surface. The filling body 16 that can be taken out in this way is made of a synthetic resin having toughness as compared with the lid 15 as described above, and can be pinched or sandwiched without using a tool such as a drill. That is, the filler 16 can be removed from the through-hole 13b as one lump, and the filler 16 can be removed at a stretch after the lid 15 is shaved off with a tool such as a drill. Therefore, the work at the time of inspection can be facilitated.

  When the inner space 30 is filled with the same brittle material as the lid 15 such as a composite resin, the following occurs. That is, the brittle material buried in the inner space 30 needs to be scraped off with a tool such as a drill. However, since the inner space 30 is deep and arranged in the oral cavity, the visibility of the inner space 30 is poor, and the brittle material is poor. May remain in the inner space 30. In particular, if the brittle material remains in the tool hole, the occlusal screw 14 cannot be turned and it becomes difficult to remove it. On the other hand, if the brittle material is carefully removed by a tool such as a drill so as not to remain, the visibility of the inner space 30 is still poor, so that the head portion 14a of the occlusal screw 14 or the whole may be erroneously damaged. On the other hand, since the filler 16 can be pulled out of the inner space 30 at a stretch, there is no need to use a tool such as a drill when taking out the filler. Therefore, it is possible to prevent a situation in which the head portion 14a of the occlusal screw 14 or the whole thereof is broken by mistake.

  The silicone material used for the impression material has a small shrinkage ratio before and after curing (for example, a shrinkage ratio after curing is 0.02% or less). Therefore, when the silicone material as described above is used, the inner space 30 can be kept filled with the filler 16 even after the curing, and the expansion of the gap formed in the inner space 30 can be suppressed. can do. Therefore, after hardening, the inner space 30 can be maintained in an environment that is not suitable for the growth of bacteria, and the growth of bacteria can be suppressed. The silicone material used for the impression material is a non-water-absorbing material, that is, a material that does not store moisture therein. Therefore, the growth of bacteria in the filler 16 can be suppressed, and the growth of bacteria in the inner space 30 can be further suppressed. The material of the filler 16 is not limited to the above-described silicone material as long as it is a synthetic resin having the above-described function (that is, a small shrinkage ratio before and after curing and a low hygroscopicity after curing). Further, the filler 16 does not necessarily need to be a material having the above-described function, and may be a material having toughness than the lid 15. Note that an antibacterial agent (for example, an antibacterial additive based on silver) may be added to the filler used as the material of the filler 16. Then, the filling body 16 has an antibacterial function, and the growth of bacteria can be further suppressed.

  Moreover, since the filling body 16 is configured by filling the inner space 30 with a filler having fluidity and curing the same, the formation of the filling body 16 is simple. Moreover, it can be made to enter into various gaps forming the inner space 30, and the inner space 30 can be more densely filled with the filler 16. Thereby, the inner space 30 can be made an environment more unsuitable for the propagation of bacteria, and the propagation of bacteria can be suppressed.

[Other embodiments]
Although the case where the artificial tooth structure 1 of the present embodiment is applied to the lower alveolar bone 2 is described, the artificial tooth structure 1 is not limited thereto and may be applied to the upper alveolar bone. In addition, the configuration of the artificial tooth structure 1 is not limited to the configuration described above. For example, the abutment body 21 and the abutment screw 22 may be configured integrally. Further, the abutment screw 22 and the occlusion screw 14 of the above-described embodiment may be integrally formed. That is, the artificial tooth structure 1A according to the second embodiment shown in FIG. 5 may be configured. In the artificial tooth structure 1A, the artificial crown 13 and the abutment 12 are joined in advance, and the artificial crown 13 and the abutment 12 are placed on the implant body 11 in a joined state. Next, the abutment screw 22A is inserted into the through hole 13b and the inner hole 21d, and the distal end portion of the abutment screw 22A is screwed into the screw hole 11a of the implant body 11. By doing so, the head 22b of the abutment screw 22A is seated on the small diameter portion 13c of the artificial crown 13, and the abutment 12A and the artificial crown 13 are sandwiched between the abutment screw 22A and the implant body 11. As a result, the abutment 12A and the artificial crown 13 are fastened and attached to the implant body 11. Since the artificial tooth structure 1A thus configured also has the through-hole 13b, filling the filler 16 therewith has the same effect as the artificial tooth structure 1 described above.

  Further, the artificial tooth structure 1B may have a structure as shown in FIG. That is, in the artificial tooth structure 1B of the third embodiment, the upper end portion 21b of the abutment main body 21B is formed to be long in the vertical direction, and the artificial crown 13B is put on the upper end portion 21b of the abutment main body 21B. Cemented without gaps. As a result, one opening of the inner hole 21d, that is, the upper opening, is closed, and the inner hole 21d is located above the abutment screw 22, that is, the inner space between the upper opening and the abutment screw 22. 30B are formed. The inner space 30B is filled with the filler 16 similarly to the artificial tooth structure 1 of the first embodiment, and has the same operation and effect as the artificial tooth structure 1 described above. In addition, the shape of each component of the artificial tooth structure 1 is not limited to the shape described above, and the same effect can be obtained by filling the through-hole 13b with the filler 16.

  Further, the material forming the filling body 16 is not limited to the silicone material used for the impression material described above. For example, the cover 15 may be made of a synthetic resin having a higher toughness than the synthetic resin that forms the lid 15 (for example, a dental photopolymerizable polymer temporary sealing material (Evadine (trademark) plus)). By configuring the filler 16 with such a tough synthetic resin, the filler 16 can be pinched and taken out from the through hole 13b, and the removal work at the time of inspection is easy. The filler 16 does not necessarily need to be formed by curing the filler, but may be formed by filling the inner space 30 with a tough tape (for example, a PTFE tape).

DESCRIPTION OF SYMBOLS 1 Artificial tooth structure 11 Implant body 12 Abutment 13 Artificial crown 13b Through hole 14 Occlusal screw (fastening member)
15 Lid 16 Filler 22A Abutment screw (fastening member)
30 interior space

Claims (6)

An implant body embedded in the alveolar bone,
An abutment attached to the implant body,
An artificial crown that is covered with the abutment and has a through hole extending toward the abutment;
A fastening member inserted into the through hole to fasten the artificial crown to the abutment or the implant body,
A lid for closing an opening side portion of the through hole,
A filling body made of a synthetic resin having toughness than the lid, the filler being disposed in the through hole so as to fill an inner space between the lid and the fastening member.   The artificial tooth structure according to claim 1, wherein the filler is made of a non-water-absorbing material.   The artificial tooth structure according to claim 1, wherein the filler contains an antibacterial agent.   The artificial tooth structure according to any one of claims 1 to 3, wherein the filler is made of a curable material that can be cured after filling the inner space with a filler having fluidity. An implant body embedded in the alveolar bone,
An abutment having an inner hole extending toward the implant body and attached to the implant body;
An artificial crown that covers the abutment and covers one opening of the inner hole;
A fastening member inserted into the inner hole to fasten the abutment to the implant body,
A filling body made of a synthetic resin having toughness than the lid, and having a filler disposed therein so as to fill an inner space between the one opening in the inner hole and the fastening member. body. An implant body buried in alveolar bone, an abutment attached to the implant body, an artificial crown having a through-hole that is placed over the abutment and extends toward the abutment, and A filling member for an artificial tooth structure, comprising: a fastening member that is inserted into the through-hole to fasten to the body or the implant body; and a lid that closes an opening side portion of the through-hole.
A filling body for an artificial tooth structure, which is made of a synthetic resin having toughness than the lid, and is disposed therein so as to fill an inner space between the lid and the fastening member in the through hole.

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