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JP3727058B2 - Artificial tooth root - Google Patents

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JP3727058B2
JP3727058B2 JP2003365492A JP2003365492A JP3727058B2 JP 3727058 B2 JP3727058 B2 JP 3727058B2 JP 2003365492 A JP2003365492 A JP 2003365492A JP 2003365492 A JP2003365492 A JP 2003365492A JP 3727058 B2 JP3727058 B2 JP 3727058B2
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artificial tooth
self
tooth root
tap
male screw
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JP2004167226A5 (en
JP2004167226A (en
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喜久二 堀内
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株式会社ホリックス
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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
    • A61C8/0022—Self-screwing

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  • Oral & Maxillofacial Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dentistry (AREA)
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  • General Health & Medical Sciences (AREA)
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  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Description

本発明は、歯科の分野において行われているいわゆる「インプラント治療」に使用される人工歯根（インプラント）に係り、特に、治療後に安定した固定状態を長期にわたって提供できるように工夫したものに関する。   The present invention relates to an artificial tooth root (implant) used for so-called “implant treatment” performed in the field of dentistry, and more particularly to a device devised so that a stable fixed state can be provided for a long time after treatment.

歯科におけるインプラント治療を図６を参照して説明する。図６はインプラント治療を施された歯の状態を示す断面図であり、まず、顎の骨１０１がある。この顎の骨１０１には所定の径の孔１０３が穿孔されていると共に該孔１０３には雌ねじ部が形成されている。そこに人工歯根１０５が螺合・接合されることになる。この人工歯根は上記孔１０３側の雌ねじ部に螺合される雄ねじ部１０７を備えていると共に、上端には支持台部１０９が形成されている。この支持台部１０９には孔が穿孔されていて、該孔には雌ねじ部が形成されている。   The dental implant treatment will be described with reference to FIG. FIG. 6 is a cross-sectional view showing a state of a tooth subjected to an implant treatment, and first, there is a jaw bone 101. A hole 103 having a predetermined diameter is drilled in the jaw bone 101 and a female screw portion is formed in the hole 103. The artificial tooth root 105 is screwed and joined there. The artificial tooth root includes a male screw portion 107 screwed into the female screw portion on the hole 103 side, and a support base portion 109 is formed at the upper end. A hole is formed in the support base 109, and a female screw portion is formed in the hole.

一方、人工歯１１１があり、この人工歯１１１の下部には固定金具１１３が取り付けられている。この固定金具１１３には雄ねじ部が形成されている。そして、予め顎の骨１０１に螺合・接合されている人工歯根１０５の支持台部１０９の雌ねじ部に上記人工歯１１１側の固定金具１１３の雄ねじ部を螺合させることにより、人工歯１１１を人工歯根１０５に固定するものである。
尚、この種の人工歯根を開示するものとして、例えば、特許文献１がある。 On the other hand, there is an artificial tooth 111, and a fixing bracket 113 is attached to the lower part of the artificial tooth 111. The fixing metal 113 is formed with a male screw portion. Then, by screwing the male screw portion of the fixing bracket 113 on the artificial tooth 111 side with the female screw portion of the support base portion 109 of the artificial tooth root 105 that is screwed and joined to the jaw bone 101 in advance, the artificial tooth 111 is formed. It is fixed to the artificial tooth root 105.
For example, Patent Document 1 discloses an artificial tooth root of this type.

特開２００３−３８５２３号公報JP 2003-38523 A

上記従来の構成によると次のような問題があった。
まず、顎の骨１０１に一旦螺合・固定された人工歯根１０５が経年変化によって緩んでしまい、その結果、そこに固定されている人工歯１１１が不安定な状態になってしまうという問題があった。
又、人工歯根１０５を顎の骨１０１側の孔１０３に螺合させるために、孔１０３に雌ねじ部を形成する加工を行う必要があり、その結果、治療に手間が掛かってしまうという問題があった。 The conventional configuration has the following problems.
First, there is a problem that the artificial tooth root 105 once screwed and fixed to the jaw bone 101 is loosened due to secular change, and as a result, the artificial tooth 111 fixed thereto becomes unstable. It was.
In addition, in order to screw the artificial tooth root 105 into the hole 103 on the jaw bone 101 side, it is necessary to perform a process of forming a female screw part in the hole 103, and as a result, there is a problem that the treatment is troublesome. It was.

本発明はこのような点に基づいてなされたものでその目的とするところは、経年変化による緩みを防止して長期にわたって安定した固定状態を得ることができ、又、治療に要する手間を軽減させて治療に要する時間を短縮させることが可能な人工歯根を提供することにある。   The present invention has been made on the basis of the above points. The object of the present invention is to prevent loosening due to secular change and to obtain a stable fixed state over a long period of time, and to reduce labor required for treatment. An object of the present invention is to provide an artificial tooth root that can reduce the time required for treatment.

上記目的を達成するべく本願発明の請求項１による人工歯根は、顎の骨側に螺合される雄ねじ部と人工歯が取り付けられる支持台部を備えた人工歯根本体と、上記人工歯根本体に設けられたセルフタップ部と、を具備し、上記セルフタップ部は少なくとも上記雄ねじ部のねじ山部に鋸歯状に設けられた第２セルフタップ部から構成されていることを特徴とするものである。
又、請求項２による人工歯根は、請求項１記載の人工歯根において、上記セルフタップ部は上記人工歯根本体の先端部に設けられた第１セルフタップ部と、上記雄ねじ部のねじ山部に鋸歯状に設けられた第２セルフタップ部とから構成されていることを特徴とするものである。
又、請求項３による人工歯根は、請求項２記載の人工歯根において、上記第１セルフタップ部は三枚刃から構成されていることを特徴とするものである。
又、請求項４による人工歯根は、請求項１又は請求項２記載の人工歯根において、上記雄ねじ部のねじ山部の内の上記支持台部側のねじ山部には鋸歯状の第２セルフタップ部を設けない構成になっていることを特徴とするものである。
又、請求項５による人工歯根は、請求項４記載の人工歯根において、上記雄ねじ部のねじ山部の内の上記支持台部側の一山又は一山から二山にかけて鋸歯状の第２セルフタップ部を設けない構成になっていることを特徴とするものである。 In order to achieve the above object, an artificial tooth root according to claim 1 of the present invention is an artificial tooth root body provided with a male screw part screwed to the bone side of the jaw and a support base part to which the artificial tooth is attached, and the artificial tooth root body. A self-tap portion provided, and the self-tap portion is constituted by a second self-tap portion provided in a sawtooth shape at least on the thread portion of the male screw portion. .
An artificial tooth root according to claim 2 is the artificial tooth root according to claim 1, wherein the self-tap portion is provided at a first self-tap portion provided at a tip portion of the artificial tooth root body and a thread portion of the male screw portion. It is comprised from the 2nd self-tap part provided in the sawtooth shape.
According to a third aspect of the present invention, there is provided the artificial tooth root according to the second aspect , wherein the first self-tap portion is composed of three blades.
According to a fourth aspect of the present invention, there is provided an artificial tooth root according to the first or second aspect, wherein a second self-shaped tooth is provided on the threaded portion on the support base side of the threaded portion of the male threaded portion. The tap portion is not provided.
According to a fifth aspect of the present invention, there is provided the artificial tooth root according to the fourth aspect, wherein a second self-toothed tooth is formed from one or two peaks on the support base side of the thread portion of the male screw portion. The tap portion is not provided.

以上詳述したように、本願発明の請求項１による人工歯根によると、顎の骨側に螺合される雄ねじ部と人工歯が取り付けられる支持台部を備えた人工歯根本体と、上記人工歯根本体に設けられたセルフタップ部と、から構成しているので、セルフタップ部を構成する凹部内に骨粉が入り込み、そこに新たに顎の骨が成長して入り込むことになるので、強固な固定状態を得ることが可能になる。それによって、人工歯根はもとよりそこに固定される人工歯の安定した固定状態を長期にわたって提供することができるものである。又、セルフタップ部によって顎骨に自ら雌ねじ部を形成することができるので、予め雌ねじ部を形成しておく工程が省略されることになる。それによって、治療に要する手間を軽減できると共に時間が短縮されることになる。
又、予め形成されている雌ねじ部に螺合される場合よりも自ら雌ねじ部を形成しながら螺合する場合の方がより強固な固定状態を得ることが可能になるものである。
尚、セルフタップ部を上記人工歯根本体の先端部に設けられた第１セルフタップ部によって構成する場合、上記雄ねじ部のねじ山部に鋸歯状に設けられた第２セルフタップ部によって構成する場合、上記人工歯根本体の先端部に設けられた第１セルフタップ部と上記雄ねじ部のねじ山部に鋸歯状に設けられた第２セルフタップ部とから構成する場合、が想定されるが、何れの場合も上記のような効果を奏することができ、特に、第１セルフタップ部と第２セルフタップ部の両方から構成した場合にはより高い効果を期待できる。
又、上記第１セルフタップ部を、例えば、三枚刃から構成することが考えられ、この場合には、第１セルフタップ部の機械的強度を維持しつつ、所望のタップ機能を期待でき、且つ、骨粉が入り込む適度な凹部を確保でき、より高い効果を期待できる。
又、上記雄ねじ部のねじ山部の内基端側のねじ山部に鋸歯状の第２セルフタップ部を設けない構成にした場合には、口腔内に近接した位置において雑菌や微粒な食べ残しが堆積し易いような凹凸部をなくすことになるので、それらの堆積や繁殖を防止することがてきる。 As described above in detail, according to the artificial tooth root according to claim 1 of the present invention, the artificial tooth root body provided with the male screw part screwed to the jaw bone side and the support base part to which the artificial tooth is attached, and the artificial tooth root Since it consists of a self-tap part provided on the main body, bone powder enters the recesses that make up the self-tap part, and new jaw bone grows and enters there, so it is firmly fixed It becomes possible to obtain the state. As a result, the artificial tooth root and the artificial tooth fixed thereto can be provided with a stable fixed state over a long period of time. Further, since the internal thread portion can be formed on the jawbone by the self-tap portion, the step of forming the internal thread portion in advance is omitted. As a result, the time and effort required for treatment can be reduced and the time can be shortened.
Further, it is possible to obtain a stronger fixed state when screwing while forming the female screw part by itself than when screwing with the female screw part formed in advance.
In the case where the self-tap portion is constituted by the first self-tap portion provided at the distal end portion of the artificial tooth root body, the self-tap portion is constituted by the second self-tap portion provided in a sawtooth shape at the thread portion of the male screw portion. It is assumed that the first self-tap portion provided at the distal end portion of the artificial tooth root body and the second self-tap portion provided in a sawtooth shape at the thread portion of the male screw portion are considered. Also in this case, the above-described effects can be obtained, and in particular, a higher effect can be expected when configured from both the first self-tap portion and the second self-tap portion.
In addition, it is conceivable that the first self-tap portion is composed of, for example, a three-blade, and in this case, a desired tap function can be expected while maintaining the mechanical strength of the first self-tap portion, And the moderate recessed part which a bone powder enters can be ensured, and the higher effect can be anticipated.
In addition, in the case where the threaded portion on the inner base end side of the threaded portion of the male threaded portion is not provided with the sawtooth-shaped second self-tap portion, it is possible to leave germs and fine leftovers at positions close to the oral cavity. As a result, it is possible to prevent the uneven portions from being easily deposited, thereby preventing their accumulation and propagation.

以下、図１乃至図３を参照して本発明の第１の実施の形態を説明する。図１は本実施の形態による人工歯根の斜視図であり、図２は同上の正面図である。まず、人工歯根本体１があり、この人工歯根本体１は軸状をなしていて、図示しない顎の骨側に形成された孔に螺合するための雄ねじ部３を備えていると共に、基部には図示しない人工歯を取り付けるための支持台部５を備えている。上記支持台部５には孔７が穿孔されていて、該孔７には雌ねじ部９が形成されている。この孔７内に図示しない人工歯側の固定金具が差し込まれてその雄ねじ部を介して上記雌ねじ部９に螺合・固定されるものである。   Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of an artificial tooth root according to the present embodiment, and FIG. 2 is a front view of the same. First, there is an artificial dental root body 1, which has an axial shape, is provided with a male screw portion 3 for screwing into a hole formed on the bone side of the jaw (not shown), and a base portion. Includes a support base 5 for attaching artificial teeth (not shown). A hole 7 is formed in the support base 5, and a female screw portion 9 is formed in the hole 7. An artificial tooth side fixing bracket (not shown) is inserted into the hole 7 and is screwed and fixed to the female screw portion 9 via the male screw portion.

上記雄ねじ部３の頂部は、図３（ｂ）にも示すように、鋸歯状に形成されていて、第２セルフタップ部１１を構成している。又、人工歯根本体１の先端部には第１セルフタップ部１５が設けられている。この第１セルフタップ部１５は三枚刃構成になっていて、図３（ｂ）にも示すように、３枚の刃１７が等間隔で設けられている。そして、これら第１セルフタップ部１５と第２セルフタップ部１１とによって、図示しない顎の骨側に形成された孔に自ら雌ねじ部を形成しながら螺合していくことになる。   As shown in FIG. 3B, the top portion of the male screw portion 3 is formed in a sawtooth shape and constitutes a second self-tap portion 11. A first self-tap portion 15 is provided at the distal end portion of the artificial tooth root body 1. The first self-tapping portion 15 has a three-blade configuration, and as shown in FIG. 3B, three blades 17 are provided at equal intervals. Then, the first self-tap portion 15 and the second self-tap portion 11 are screwed together while forming a female screw portion in a hole formed on the bone side of the jaw (not shown).

以上の構成を基にその作用を説明する。
まず、インプラント治療の手順であるが、図示しない顎の骨の所定個所に所定の径の孔を穿孔する。次に、その孔に本実施の形態による人工歯根を挿入していく。その際、第１セルフタップ部１５と第２セルフタップ部１１とによって自ら雌ねじ部を形成していきながらそこに螺合していく。人工歯根の螺合・接合が完了したら、その支持台部５に図示しない人工歯を取り付けることになり、後は必要な処置を施すことによりインプラント治療が終了する。 The operation will be described based on the above configuration.
First, in the procedure of implant treatment, a hole having a predetermined diameter is drilled at a predetermined portion of a jaw bone (not shown). Next, the artificial tooth root according to the present embodiment is inserted into the hole. At that time, the first self-tap portion 15 and the second self-tap portion 11 are screwed together while forming the female screw portion by themselves. When screwing / joining of the artificial tooth root is completed, an artificial tooth (not shown) is attached to the support base 5, and thereafter, implant treatment is completed by performing necessary treatment.

又、上記のような手順で取り付けられた人工歯根の場合には、第１セルフタップ部１５と第２セルフタップ１１において、雌ねじ部の形成時に発生した骨粉が凹部内に入り込み、且つ、そこに新たに成長した顎の骨が入り込むことになる。その結果、強固な固定状態を得ることができるようになる。
具体的には、第１セルフタップ部１５の３枚の刃１７相互間に骨粉が入り込み、且つ、そこに新たに成長した顎の骨が入り込んでいく。同様に、第２セルフタップ部１１の鋸歯の凹部内に骨粉が入り込み、且つ、そこに新たに成長した顎の骨が入り込んでいく。 Further, in the case of an artificial tooth root attached in the above-described procedure, bone powder generated at the time of forming the female screw portion enters the recess in the first self-tap portion 15 and the second self-tap 11, and there Newly grown jaw bones will enter. As a result, a firm fixed state can be obtained.
Specifically, bone powder enters between the three blades 17 of the first self-tap portion 15, and newly grown jaw bone enters there. Similarly, bone powder enters the recessed portion of the sawtooth of the second self-tap portion 11, and the newly grown jaw bone enters there.

以上本実施の形態によると次のような効果を奏することができる。
まず、第２セルフタップ部の３枚の刃１７相互間に骨粉が入り込むと共に、第２セルフタップ部１１の鋸歯状部にも骨粉が入り込む。そして、そこに新たに顎の骨が成長して入り込むことになるので、強固な固定状態を得ることが可能になる。それによって、人工歯根はもとより人工歯の安定した固定状態を長期にわたって提供することができるものである。
又、第１セルフタップ部１５と第２セルフタップ部１１とによって顎の骨に自ら雌ねじ部を形成することができるので、予め雌ねじ部を形成しておく工程が省略されることになる。それによって、治療に要する手間を軽減できると共に時間が短縮されることになる。
又、予め形成されている雌ねじ部に螺合される場合よりも自ら雌ねじ部を形成しながら螺合する場合の方がより強固な固定状態を得ることが可能になるものである。つまり、形成される雌ねじ部に対して人工歯根側の雄ねじ部３がより強固に密着した状態になるものである。
又、上記第１セルフタップ部１５は三枚の刃１７から構成されていて、第１セルフタップ部１５の機械的強度を維持しつつ、所望のタップ機能を期待でき、且つ、骨粉が入り込む適度な凹部を確保できるようになっているので、より高い効果を期待できる。 As described above, according to the present embodiment, the following effects can be obtained.
First, bone powder enters between the three blades 17 of the second self-tap portion, and also enters the sawtooth portion of the second self-tap portion 11. Since a new jaw bone grows and enters there, it is possible to obtain a firm fixed state. As a result, a stable fixed state of the artificial tooth as well as the artificial tooth root can be provided over a long period of time.
In addition, since the internal thread portion can be formed on the jaw bone by the first self-tap portion 15 and the second self-tap portion 11, the step of forming the internal thread portion in advance is omitted. As a result, the time and effort required for treatment can be reduced and the time can be shortened.
Further, it is possible to obtain a stronger fixed state when screwing while forming the female screw part by itself than when screwing with the female screw part formed in advance. That is, the male screw portion 3 on the artificial tooth root side is in a more tightly adhered state to the formed female screw portion.
Further, the first self-tap portion 15 is composed of three blades 17 and can be expected to have a desired tap function while maintaining the mechanical strength of the first self-tap portion 15, and can appropriately enter bone powder. Since a large concave portion can be secured, a higher effect can be expected.

次に、図４及び図５を参照して本発明の第２の実施の形態を説明する。前記第１の実施の形態の場合には、雄ねじ部３の全てのねじ山部に鋸歯状の第２セルフタップ部１１を設けたが、この第２の実施の形態の場合には、支持台部５側の一山から二山目に掛けて、上記鋸歯状の第２セルフタップ部１１を設けないようにしたものである。つまり、鋸歯状ではなく普通のねじ山部となっている。これは次のような理由による。   Next, a second embodiment of the present invention will be described with reference to FIGS. In the case of the first embodiment, the sawtooth-shaped second self-tap portion 11 is provided in all the screw thread portions of the male screw portion 3, but in the case of the second embodiment, a support base is provided. The sawtooth-shaped second self-tap portion 11 is not provided from the first mountain to the second mountain on the portion 5 side. That is, it is not a sawtooth shape but a normal thread portion. This is due to the following reason.

人工歯根の上端部、すなわち、支持台部５側は比較的口腔内に近い場所に位置することになる。口腔内には様々な雑菌や微粒の食べ残し等があり、それらが、人工歯と歯茎の間を通って人工歯根の上端部付近に侵入することが予想される。その際、ねじ山部に鋸歯状の凹凸が存在すると、そこにそれら雑菌や微粒な食べ残しが堆積して繁殖することが懸念される。そこで、支持台部５側の一山から二山目に掛けて、上記鋸歯状の第２セルフタップ部１１を設けない普通のねじ山部として、雑菌や微粒な食べ残しが堆積し易いような凹凸部をなくしたものである。   The upper end portion of the artificial tooth root, that is, the support base 5 side is located at a location relatively close to the oral cavity. There are various miscellaneous germs and fine food leftovers in the oral cavity, and these are expected to penetrate between the artificial tooth and the gum and near the upper end of the artificial tooth root. At that time, if serrated irregularities exist in the thread portion, there is a concern that these germs and fine leftovers accumulate and propagate there. Therefore, as an ordinary screw thread part that does not have the sawtooth second self-tap part 11 from the first mountain to the second mountain on the support base part 5 side, miscellaneous bacteria and fine leftovers are likely to accumulate. The uneven portion is eliminated.

したがって、前記第１の実施の形態と同様の効果を奏することができると共に、人工歯根の雄ねじ部３の上端部における雑菌や微粒な食べ残しの堆積・繁殖を防止することができ、それらに起因した各種疾病の発生を未然に防止することができる。   Accordingly, the same effects as those of the first embodiment can be achieved, and it is possible to prevent accumulation and propagation of germs and fine leftovers at the upper end portion of the male screw portion 3 of the artificial tooth root. The occurrence of various diseases can be prevented in advance.

尚、本発明は前記第１及び第２の実施の形態に限定されるものではない。
例えば、第１セルフタップ部１５を３枚刃とする以外にも、例えば、２枚、４枚以上の刃によって構成することも考えられる。
又、前記第１の実施の形態、第２の実施の形態では、第１セルフタップ部と第２セルフタップの両方を設けるようにしたが、何れか一方のみを設けることも考えられる。
その他図示した構成はあくまで一例である。 The present invention is not limited to the first and second embodiments.
For example, in addition to the first self-tap portion 15 having three blades, it may be configured by, for example, two, four or more blades.
In the first embodiment and the second embodiment, both the first self-tap portion and the second self-tap are provided. However, only one of them may be provided.
The other illustrated configurations are merely examples.

本発明は、歯科の分野において行われているいわゆる「インプラント治療」に使用される人工歯根（インプラント）に係り、特に、治療後に安定した固定状態を長期にわたって提供できるように工夫したものに関するものであり、インプラント治療において好適なものである。   The present invention relates to an artificial tooth root (implant) used in so-called “implant treatment” performed in the field of dentistry, and more particularly to a device devised to provide a stable fixed state for a long period of time after treatment. Yes, it is suitable for implant treatment.

本発明の第１の実施の形態を示す図で、人工歯根の全体構成を示す斜視図である。It is a figure which shows the 1st Embodiment of this invention and is a perspective view which shows the whole structure of an artificial tooth root. 本発明の第２の実施の形態を示す図で、人工歯根の全体構成を示す正面図である。It is a figure which shows the 2nd Embodiment of this invention, and is a front view which shows the whole structure of an artificial tooth root. 本発明の第１の実施の形態を示す図で、図３（ａ）は図２のａ−ａ矢視図、図３（ｂ）は図２のｂ−ｂ矢視図である。FIGS. 3A and 3B are diagrams showing a first embodiment of the present invention, in which FIG. 3A is a view taken along an arrow aa in FIG. 2 and FIG. 3B is a view taken along an arrow bb in FIG. 本発明の第２の実施の形態を示す図で、人工歯根の全体構成を示す斜視図である。It is a figure which shows the 2nd Embodiment of this invention, and is a perspective view which shows the whole structure of an artificial tooth root. 本発明の第２の実施の形態を示す図で、人工歯根の全体構成を示す正面図である。It is a figure which shows the 2nd Embodiment of this invention, and is a front view which shows the whole structure of an artificial tooth root. 従来例を示す図で、インプラント治療を施された歯の様子を示す断面図である。It is a figure which shows a prior art example, and is sectional drawing which shows the mode of the tooth which performed the implant treatment.

符号の説明Explanation of symbols

１ 人工歯根本体
３ 雄ねじ部
５ 支持台部
１１ 第２セルフタップ部
１５ 第１セルフタップ部
１７ 刃



















DESCRIPTION OF SYMBOLS 1 Artificial root main body 3 Male screw part 5 Supporting base part 11 2nd self-tap part 15 1st self-tap part 17 Blade



















Claims (5)

顎の骨側に螺合される雄ねじ部と人工歯が取り付けられる支持台部を備えた人工歯根本体と、
上記人工歯根本体に設けられたセルフタップ部と、を具備し、
上記セルフタップ部は少なくとも上記雄ねじ部のねじ山部に鋸歯状に設けられた第２セルフタップ部から構成されていることを特徴とする人工歯根。 An artificial tooth root body including a male screw part screwed to the bone side of the jaw and a support base part to which the artificial tooth is attached;
A self-tap portion provided in the artificial tooth root body,
The artificial tooth root is characterized in that the self-tap portion is composed of a second self-tap portion provided in a sawtooth shape at least on the thread portion of the male screw portion. 請求項１記載の人工歯根において、
上記セルフタップ部は上記人工歯根本体の先端部に設けられた第１セルフタップ部と、上記雄ねじ部のねじ山部に鋸歯状に設けられた第２セルフタップ部とから構成されていることを特徴とする人工歯根。 The artificial tooth root according to claim 1,
The self-tap portion is composed of a first self-tap portion provided at a tip portion of the artificial tooth root main body and a second self-tap portion provided in a sawtooth shape on a thread portion of the male screw portion. A featured artificial tooth root. 請求項２記載の人工歯根において、
上記第１セルフタップ部は三枚刃から構成されていることを特徴とする人工歯根。 The artificial tooth root according to claim 2 ,
The artificial tooth root characterized in that the first self-tap portion is composed of three blades. 請求項１又は請求項２記載の人工歯根において、
上記雄ねじ部のねじ山部の内の上記支持台部側のねじ山部には鋸歯状の第２セルフタップ部を設けない構成になっていることを特徴とする人工歯根。 In the artificial tooth root according to claim 1 or 2,
An artificial tooth root having a configuration in which a sawtooth-shaped second self-tap portion is not provided in a screw thread portion on the support base portion side of the screw thread portion of the male screw portion. 請求項４記載の人工歯根において、
上記雄ねじ部のねじ山部の内の上記支持台部側の一山又は一山から二山にかけて鋸歯状の第２セルフタップ部を設けない構成になっていることを特徴とする人工歯根。 The artificial tooth root according to claim 4,
An artificial tooth root having a configuration in which a sawtooth-shaped second self-tap portion is not provided from one mountain or one mountain to two mountains on the support base portion side of the thread portion of the male screw portion.
JP2003365492A 2002-10-31 2003-10-27 Artificial tooth root Expired - Fee Related JP3727058B2 (en)

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