WO2014112188A1 - Implant dentaire - Google Patents

Implant dentaire Download PDF

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Publication number
WO2014112188A1
WO2014112188A1 PCT/JP2013/080419 JP2013080419W WO2014112188A1 WO 2014112188 A1 WO2014112188 A1 WO 2014112188A1 JP 2013080419 W JP2013080419 W JP 2013080419W WO 2014112188 A1 WO2014112188 A1 WO 2014112188A1
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WO
WIPO (PCT)
Prior art keywords
bone
artificial tooth
tooth root
joining portion
mucous membrane
Prior art date
Application number
PCT/JP2013/080419
Other languages
English (en)
Japanese (ja)
Inventor
克則 行田
良介 池谷
進一郎 花田
正行 高山
一男 広田
Original Assignee
株式会社ジーシー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ジーシー filed Critical 株式会社ジーシー
Priority to JP2014557332A priority Critical patent/JP6053829B2/ja
Publication of WO2014112188A1 publication Critical patent/WO2014112188A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
    • A61C8/0037—Details of the shape
    • A61C8/0045—Details of the shape with a stepped body

Definitions

  • the present invention relates to an artificial tooth root used for dental implant treatment, in which a bone-binding portion and a mucosal-bonding portion are integrally formed.
  • a conventional dental implant is a portion that is embedded in the jawbone (alveolar bone) of a portion that has lost teeth and is bonded to the alveolar bone (sometimes referred to as an artificial tooth root, a fixture, an implant body, or the like), and It has a part (sometimes called abutment, abutment, etc.) that protrudes from one end of the artificial tooth root to the inside of the oral cavity, and both are fixed with separate screws that pass through the abutment and screw into the artificial tooth root.
  • the oral cavity inner end portion of the artificial tooth root that is, the boundary side end portion with the abutment
  • was embedded up to substantially the same surface as the bone surface for example, Patent Document 1).
  • the abutment is provided with a through hole, the artificial tooth root has a female screw, and a male screw-shaped fixing screw is passed through the abutment through hole so that the artificial tooth root has a female screw. It is fixed by screwing into
  • Patent Document 2 As one means for solving this problem, there is a technique for integrally producing an abutment and an artificial tooth root (for example, Patent Document 2).
  • Patent Document 2 a technique for integrally producing an abutment and an artificial tooth root.
  • Patent Document 2 since the entire implant becomes long, the work space at the time of implantation is limited, so that it cannot be applied to the molar portion.
  • an implant in which a conventional abutment and artificial tooth root are simply integrated it has been difficult to suppress bone resorption caused by the movement of gingiva.
  • a part that adheres to the bone (bone joint part) and a part that protrudes into the oral cavity from the bone joint part and contacts the gingiva (sometimes referred to as a mucous membrane joint part or a collar part).
  • An artificial tooth root having a mucous membrane joint is formed in a concave shape to match the shape of the gingiva.
  • there is a method of matching the entire shape including the joint portion of the artificial tooth root and / or the abutment to the shape of the gingiva for example, Patent Documents 4 and 5).
  • JP-A-10-108771 JP 2005-329244 A Japanese Patent Laid-Open No. 10-014940 JP-T-2001-523132 JP 2009-082171 A JP 2010-194170 A Special table 2007-519467
  • this invention makes it a subject to provide the artificial tooth root which can be applied also to a molar part, and also can suppress bone resorption because the shape of a mucous membrane coupling part is suitable for gums.
  • the inventors of the present invention have developed a special concave shape in the mucosal joint in an artificial tooth root in which the oral cavity inner end of the artificial tooth penetrates the gingiva (semi-integrated type).
  • a step in the connecting portion between the mucosal joint portion and the bone joint portion it is possible to more reliably perform the coupling with the gingiva than in the past, and thus the present invention has been investigated by suppressing bone resorption. completed.
  • the present invention will be described below.
  • reference numerals attached to the drawings are described in parentheses, but the present invention is not limited thereto.
  • the present invention relates to an artificial dental root (10) in which at least a portion is embedded in an alveolar bone of a portion where a tooth has been lost, and is a bone that is to be embedded in the alveolar bone and to be connected to the alveolar bone.
  • a joint part (20), and a mucosal joint part (30) which is provided integrally with the bone joint part on the side to be inside the oral cavity of the bone joint part and to be joined to the gingiva,
  • a concave portion (31) whose outer diameter gradually decreases as it approaches the axial central portion from both axial end portions, and a step (33) is formed at the connecting portion between the bone joint portion and the mucosa joint portion. It is an artificial tooth root.
  • the axial length of the mucosal joint (30) is preferably 1.0 mm or greater and 5.0 mm or less.
  • the outer diameter (D 1 ) of the bone joint portion (20) on the connecting surface with the mucosa joint portion (30) and the portion having the smallest outer diameter among the concave portions (31) of the mucosa joint portion It is preferable that the difference with the outer diameter (D 2 ) is 0.2 mm or more and 6.0 mm or less.
  • the present invention can be applied to the molar portion, the coupling with the gingiva can be made stronger by the concave portion of the mucosa coupling portion, and further, the bone resorption can be suppressed by providing the step.
  • FIG. 2 is a diagram illustrating the structure of an implant 1.
  • 2A is an enlarged view paying attention to the mucosal joint
  • FIG. 2B is a sectional view including the central axis in the embedding direction and along the central axis.
  • FIG. 3A is a diagram for explaining another example of the mucous membrane coupling portion
  • FIG. 3B is a diagram for explaining a further different example. It is a figure explaining the state which has arrange
  • FIG. 1 is a diagram schematically showing the structure of an implant 1 including an artificial tooth root 10 according to one embodiment.
  • the implant 1 includes an abutment 2 and an artificial tooth root 10.
  • the abutment 2 has its jawbone side (lower end side in FIG. 1) fixed to the artificial tooth root, and an artificial dental crown (not shown) is attached to the inner side of the oral cavity (upper end side in FIG. 1).
  • the artificial dental crown is a part that substantially compensates for the missing portion of the dentition, has a shape imitating a tooth, and the shape and texture of the tooth are reproduced. That is, the abutment 2 functions as a member that connects the artificial root 10 and the artificial dental crown. A well-known thing can be used as such an abutment.
  • the artificial tooth root 10 is also referred to as a fixture or an implant body, and is a member that is embedded in the alveolar bone of the portion where the tooth has been lost and serves as a basis for appropriately fixing the entire implant 1 in the oral cavity.
  • the artificial tooth root 10 includes a bone joint portion 20 and a mucosa joint portion 30.
  • the bone joint portion 20 is a portion that is embedded in the alveolar bone of the artificial dental root 10 and serves as a basis for holding the implant by binding to the alveolar bone. Therefore, the bone connecting portion 20 is often provided with a male screw shape from the viewpoint of easy embedding and prevention of removal after the embedding. According to this, at the time of embedding, the artificial dental root can be deeply embedded in the alveolar bone by rotating like a so-called screw. On the other hand, after embedding, the uneven shape of the male screw becomes resistance to the occlusion of the artificial tooth root, and the omission is prevented.
  • the bone-bonding portion of the artificial root is generally engraved with a screw for insertion (male screw), but may have a cylinder shape that has a proven record as an artificial tooth root.
  • a method for producing an artificial tooth root a method of cutting a titanium or titanium alloy rod is generally used, but it can also be produced by powder metallurgy, laser sintering, or the like.
  • the surface of the bone joint portion is a rough surface called a moderately rough surface from the viewpoint of prevention of slipping out as described above.
  • the production of the rough surface is not limited as long as it is a normal method.
  • a method of sandblasting with metal oxide particles such as alumina, hydroxyapatite, titanium oxide or the like having a particle size of about 50 ⁇ m to 200 ⁇ m a method of etching with acid treatment of hydrochloric acid, sulfuric acid, etc., and a combination of sandblasting and acid treatment
  • Various treatment methods such as a method and a method by anodizing treatment can be mentioned.
  • a method of using sandblast and acid treatment in combination is more preferable from the viewpoint of easy control of conditions.
  • a calcium phosphate compound such as hydroxyapatite, carbonate apatite, ⁇ calcium phosphate, ⁇ calcium phosphate, calcium octaphosphate, and calcium polyphosphate is coated on the bone joint portion with a thickness of 1 ⁇ m or less. It is preferable to subject the surface to a surface treatment.
  • the mucosal joint portion 30 is formed integrally with the bone joint portion 20 via a connecting portion on one end side of the bone joint portion 20 on the side to be the inside of the oral cavity, and has a form described below. It is a part.
  • the mucous membrane coupling portion 30 protrudes from the alveolar bone in a posture in which the artificial dental root 10 is embedded in the alveolar bone, and is arranged at the site of the gingiva and coupled to the gingiva.
  • FIG. 2A shows an enlarged view focusing on the site of the mucosal joint portion 30, and FIG. 2B shows a sectional view including the central axis in the embedding direction and along the central axis.
  • FIG.2 (b) represents only the outer periphery line among the cross sections.
  • the mucosa coupling portion 30 is formed from the axial end portions (direction along the axis) of the mucosa coupling portion 30 in the axial center portion. It is formed so that the outer diameter gradually decreases as it approaches. That is, the concave portion 31 is formed on the side surface that is the surface along the axial direction of the mucous membrane coupling portion 30.
  • the shape of the recess 31 preferably includes a central axis in the embedding direction and has a smooth curved shape in a cross section along the central axis. More preferably, the curve is a conic curve in the line connecting the upper end and the lower end of the recess 31.
  • the concave portion is not formed beyond the semicircle and the half ellipse (that is, the central angle of the arc and the ellipse is 180 ° or less).
  • the concave portion may be a concave portion 31 'formed of a broken line in which three straight lines are combined at least in the axial cross section.
  • Three or more straight lines may be used, and the number is not particularly limited. It can be said that the more the number of the straight lines, the closer to the curve as shown in FIG. FIG. 3B shows an example of the concave portion 31 ′′ composed of a broken line in which five straight lines are combined.
  • the depth of the concave portion 31 includes the outer diameter D 1 in the connection surface with the mucosal joint portion 30 in the bone joint portion 20 and the outer diameter of the concave portion 31 of the mucosa joint portion 30.
  • the difference between D 1 and D 2 defined by the difference from the outer diameter D 2 at the smallest portion is preferably 0.2 mm or more and 6.0 mm or less, and 1.0 mm or more and 5.0 mm or less. It is more preferable. That is, the size indicated by IIa in FIGS. 2A and 2B is preferably 0.1 mm or more and 3.0 mm or less, and more preferably 0.5 mm or more and 2.5 mm or less. By being in this range, it can contact with gingiva more favorably.
  • a chamfered portion 32 that is a straight line in the axial cross section may be provided on at least one of both axial end portions.
  • the chamfered portion 32 is provided only on the side opposite to the bone joint portion 20 in the end portion in the axial direction.
  • a chamfered portion is provided on the opposite side of the bone joint portion 20 as in this embodiment, the workability at the time of manufacturing the artificial tooth root 10 is improved and the edge of the abutment 2 can be prevented from being sharpened.
  • a chamfered portion is provided on the bone bonding portion side, workability is improved when the artificial tooth root 10 is manufactured.
  • the axial size of the chamfered portion (the size indicated by IIb in FIGS. 2A and 2B) is preferably 0.2 mm or more and 1.0 mm or less.
  • the length in the axial direction of the mucosa-bonding portion 30 represented by IIc is preferably 1.0 mm or more and 5.0 mm or less. If the thickness is less than 1.0 mm, depending on the mucous membrane, the contact may be weakened, and gingiva exceeding 5.0 mm is practically few. Preferably they are 1.0 mm or more and 3.0 mm or less.
  • a step 33 is provided at the connecting portion between the bone joint 20 and the mucosa joint 30.
  • the bone is slightly regenerated to the upper side of the step, and bone resorption is very difficult to occur.
  • Step 33 than the outer diameter D 1 of the mucous membrane-binding portion 30 end of the bone coupling part 20, the outer diameter D 3 of the bone coupling part 20 side end of the mucous membrane-binding portion 30 is small at 0.2mm or 1.0mm or less It is preferable to be formed. That is, the distance indicated by IId in FIGS. 2A and 2B is preferably 0.1 mm or more and 0.5 mm or less.
  • the step is preferably horizontal (parallel to the radial direction) when viewed in the axial cross section shown in FIG. 2B, but may be inclined within a range of ⁇ 5 ° from the horizontal.
  • the mucous membrane bonding portion 30 has a relatively smooth surface.
  • the arithmetic average roughness Ra JIS B 0601 (1994)
  • the running direction of the collagen fiber of the natural tooth gingiva is perpendicular to the tooth, but the running direction of the collagen fiber of the gingiva in the case of the conventional artificial tooth root is parallel to the tooth. Therefore, in the conventional artificial tooth root, it becomes difficult to combine the gum and the artificial tooth root.
  • the gingival collagen fibers that are curved and touched along the concave portion also have an effect of bonding, the gingival collagen fibers are aligned and bonded at right angles to the artificial tooth root.
  • gingival collagen fibers enter the groove, and the opportunity for the gingival fibers to contact the artificial tooth at a right angle increases accordingly. Therefore, according to the present invention, the direction of the collagen fibers of the gingiva is closer to that of the natural tooth than the conventional artificial tooth root, thereby improving the gingival connectivity. This becomes more remarkable by providing the groove.
  • the artificial root 10 described above is manufactured using titanium or a titanium alloy. Titanium is generally 2 or 4 pure titanium. As the titanium alloy, a Ti6Al4V alloy is most used, but a Ti6Al7Nb alloy or the like is also used, and any titanium alloy that is currently used can be used without particular limitation. Further, the mucous membrane bonding portion 30 can promote the bonding with the gingival collagen fibers by depositing silver, silver alloy, gold, or gold alloy. This vapor deposition can be performed on the surface of a metal or an alloy by heating these metals under general vacuum vapor deposition conditions, that is, a vacuum of about 10 mmHg to 3 mmHg or less.
  • the artificial tooth root 10 having the above-described configuration and the implant 1 having the same are arranged in the oral cavity as shown in FIG. 4, for example. That is, the bone joint portion 20 of the artificial dental root 10 is embedded in the alveolar bone, and the mucosa joint portion 30 is disposed in the gingiva protruding from the alveolar bone from the end on the gingival side. And the abutment 2 is attached to the edge part of the mucous membrane coupling
  • the bone grows so as to cover the step 33 due to the step 33, so that bone resorption hardly occurs.
  • the shape of the concave portion 31 of the mucous membrane coupling portion 30 allows the gingiva to appropriately enter the concave portion 31, and the gingiva is reliably in contact with the concave portion 31, so that the movement of the gingiva is suppressed and the gingival fibers are easily combined. Due to the above effects, the artificial dental root 10 can suppress bone resorption.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Abstract

La présente invention concerne un implant dentaire qui peut être appliqué sur une molaire et qui en outre peut réduire la résorption osseuse, du fait qu'une partie jonction de membrane muqueuse possède une forme qui épouse la gencive. L'implant dentaire (10) est conçu pour au moins une implantation partielle dans une section d'os alvéolaire d'où une dent a disparu et possède une partie jonction osseuse (20) constituant une région à implanter dans l'os alvéolaire et à joindre à l'os alvéolaire, ainsi qu'une partie jonction (30) de membrane muqueuse fournie solidairement à la partie jonction osseuse, sur le côté qui constituera le côté de la partie jonction osseuse tournée vers l'intérieur de la cavité buccale, pour une jonction à la gencive. La partie jonction de membrane muqueuse possède un creux (31) d'un diamètre externe diminuant progressivement en s'approchant de la partie centrale axiale depuis l'une ou l'autre extrémité axiale, formant un épaulement (33) dans la partie liée de la partie jonction osseuse et la partie jonction de membrane muqueuse.
PCT/JP2013/080419 2013-01-18 2013-11-11 Implant dentaire WO2014112188A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014557332A JP6053829B2 (ja) 2013-01-18 2013-11-11 インプラント

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Application Number Priority Date Filing Date Title
JP2013-007546 2013-01-18
JP2013007546 2013-01-18

Publications (1)

Publication Number Publication Date
WO2014112188A1 true WO2014112188A1 (fr) 2014-07-24

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WO (1) WO2014112188A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11589967B2 (en) 2016-07-15 2023-02-28 Cudeti Sagl Implant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01159830U (fr) * 1988-04-27 1989-11-06
JPH02136612U (fr) * 1989-04-19 1990-11-14
JP2007519467A (ja) * 2004-01-29 2007-07-19 ノベル バイオケアー アーベー （パブル） 歯科用インプラント装置
JP2010194170A (ja) * 2009-02-26 2010-09-09 Kikusui Chemical Industries Co Ltd インプラントフィクスチャー

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2725194B2 (ja) * 1988-12-16 1998-03-09 株式会社アドバンス 人工歯根
JPH02305570A (ja) * 1989-05-19 1990-12-19 Tdk Corp 人工歯根
US7806693B2 (en) * 2007-04-23 2010-10-05 Nobel Biocare Services Ag Dental implant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01159830U (fr) * 1988-04-27 1989-11-06
JPH02136612U (fr) * 1989-04-19 1990-11-14
JP2007519467A (ja) * 2004-01-29 2007-07-19 ノベル バイオケアー アーベー （パブル） 歯科用インプラント装置
JP2010194170A (ja) * 2009-02-26 2010-09-09 Kikusui Chemical Industries Co Ltd インプラントフィクスチャー

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11589967B2 (en) 2016-07-15 2023-02-28 Cudeti Sagl Implant

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Publication number Publication date
JP6053829B2 (ja) 2016-12-27
JPWO2014112188A1 (ja) 2017-01-19

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