JP4954072B2 - 歯科用充填材 - Google Patents
歯科用充填材 Download PDFInfo
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- JP4954072B2 JP4954072B2 JP2007524779A JP2007524779A JP4954072B2 JP 4954072 B2 JP4954072 B2 JP 4954072B2 JP 2007524779 A JP2007524779 A JP 2007524779A JP 2007524779 A JP2007524779 A JP 2007524779A JP 4954072 B2 JP4954072 B2 JP 4954072B2
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- filler
- thermoplastic polymer
- polymer matrix
- thermoplastic
- matrix material
- Prior art date
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Landscapes
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- Animal Behavior & Ethology (AREA)
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- Veterinary Medicine (AREA)
- Plastic & Reconstructive Surgery (AREA)
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- Dental Preparations (AREA)
- Materials For Medical Uses (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
Description
本願は、2004年8月6日に出願された出願番号第10/914,057号の一部継続である。
抜歯した中切歯を、残存する歯の壁が同様のサイズとなるように、根管ファイルを用いて標準サイズに前処理した。根管は以下の通りに修復した。郡1(15本の歯)−陽性対照−根管充填材は入れなかった。群2(15本の歯)−側方加圧充填ガッタパーチャおよびAH26シーラーで充填した根管。群3(15本の歯)−垂直加圧充填ガッタパーチャおよびAH26根管シーラーで充填した根管。群4(15本の歯)−根管壁をセルフエッチプライマーで前処理し、根管シーラントシーラーで充填し、次いで、本発明によるレジンパーチャで垂直に充填した。すべての歯根を、強度試験を実施するまで、100%湿度の容器に2週間入れた。2週間後、歯を、市販の樹脂を用いて、樹脂の上に8mmの歯根が残るレベルにプラスチックリングの中に埋め込んだ。このリングをインストロン(Instron)の機械内に取り付けた。この機械には、ボールアタッチメントが、作動すると、歯の長軸に沿ってくさび様の力を加えるよう配置されている。ここで図3および4について記載すると、これらにはサンプルのインストロンの機械内への配置が示されている。歯の上にボールが正しく配置されていることを確認し、破折が起こるまで歯に徐々に増加する力が負荷されるようインストロンの機械を作動させた。各群の各歯の破折に対する抵抗(破折力)を記録し、以下の表2では群の平均破折値が比較されている。
Union Carbideから入手できるポリカプロラクトンを約40%の量で、バイオガラス(Bioglass)(商標)(U.S. Biomaterialsから入手可能)と同様の組成物を有する生物活性ガラスを約30%の量で、USP等級酸化亜鉛を約20%の量で、放射線不透過剤として硫酸バリウムを約10%の量で含む組成物を製造した。組成物を形成する方法には、ポリカプロラクトンを約70℃で軟化状態に加熱することを含めた。次いで、残りの成分を添加し、混錬、加圧または混合作用下で混合して、ポリカプロラクトン中に完全にブレンドして均一なドウ(dough)を形成した。その結果、形成された化合物はキャリア装置に適用する準備ができた状態となった。
ポリカプロラクトンを約30%の量で、カプロラクトン(メタクリルオキシ)エチルエステル(CMEE)を約10%の量で、リン酸三カルシウムを約30%の量で、酸化ジルコニウムを約10%の量で含む組成物を製造した。組成物を形成する方法には、ポリカプロラクトン(Union Carbideから入手可能)を約70℃で軟化状態に加熱することを含めた。次いで、残りの成分を添加し、混錬、加圧または混合作用下で混合して、ポリカプロラクトン中に完全にブレンドして均一なドウを形成した。その結果、形成された化合物はキャリア装置に適用する準備ができた状態となった。
上記の表3の組成物を、対流式オーブン中、約80℃で軟化した。材料が加工可能な稠度にある間に、2枚のガラススライドの間の直径15mm、厚さ1.2mmの鋼金型の中に入れ、ベンチ温度に冷却した。サンプルディスクが形成され、ガラススライドおよび金型を取り除いた。縁からばりを取り除くのに多少のトリミングが必要であった。各試験材料のために5枚のディスクを調製した。
本明細書における組成物の柔軟性を試験するために、義歯床ポリマのためのADA仕様書番号12に記載される曲げたわみ試験のための試験装置をこの試験に用いた。試験サンプルは、材料が柔らかい状態にある間にテフロン(TEFLON)(登録商標)分割可能金型において50×3×3mmのバーに作製した。ローディングノーズ(loading nose)を通じて、500グラム重量を試験サンプルの中心にかけた。2つの支持体の間の長さは30mmとした。1分後、静止負荷を取り除き(サンプルが静置期間の間に壊れていなければ)、最大たわみ距離を測定し、記録した。各試験材料につき、3種の試験サンプルを実施した。試験結果を表5に示す。
Claims (81)
- 窩洞および根管のための充填材であって、
第1の熱可塑性ポリママトリックス材を含む内側コア部分と、
前記内側コア部分上に配置され、前記内側コア部分を取り囲んでいる外層材であって、第2の熱可塑性ポリママトリックス材を含む外層材と、
を備え、
前記充填剤が根管シーラントに接着した場合に3MPa以上の接着強度を有し、
前記第1および第2の熱可塑性ポリママトリックスが生物活性フィラーを任意選択で含み、
前記第1の熱可塑性ポリママトリックス材および前記第2の熱可塑性ポリママトリックス材が異なるメルトフローインデックスを有する生分解性ポリマを含み、前記第1の熱可塑性ポリママトリックス中の生分解性ポリマが前記第2の熱可塑性マトリックス中の生分解性ポリマよりもより低いメルトフローインデックスを有し、
前記第1の熱可塑性ポリママトリックスのメルトフローインデックスが0.1〜4.0グラム/分であり、前記第2の熱可塑性ポリママトリックスのメルトフローインデックスが4.5〜20.0グラム/分である充填材。 - 前記第1の熱可塑性ポリママトリックス材および前記第2の熱可塑性ポリママトリックス材が異なる分子量および異なるメルトフローインデックスを有する同一の生分解性ポリマを含み、前記第1の熱可塑性ポリママトリックス中の生分解性ポリマが前記第2の熱可塑性マトリックス中の生分解性ポリマよりもより低いメルトフローインデックスを有する、請求項1に記載の充填材。
- 前記第1の熱可塑性ポリママトリックスのメルトフローインデックスが0.5〜3.0グラム/分である、請求項2に記載の充填材。
- 前記第2の熱可塑性ポリママトリックスのメルトフローインデックスが5.0〜15.0グラム/分である、請求項2に記載の充填材。
- 前記第1の熱可塑性ポリママトリックス中のポリマが、前記第2の熱可塑性マトリックス中のポリマよりもより大きな分子量を有する、請求項1に記載の充填材。
- 前記第1の熱可塑性マトリックスと前記第2の熱可塑性マトリックスがいずれもポリカプロラクトンポリマを含む、請求項2に記載の充填材。
- 前記第1の熱可塑性ポリママトリックスおよび前記第2の熱可塑性ポリママトリックスの融点が60〜100℃の範囲である、請求項6に記載の充填材。
- 前記内側コア部分および外層材が根管溶剤に溶解可能である、請求項1に記載の充填材。
- 前記根管溶剤が塩素系溶剤を含む、請求項8に記載の充填材。
- 前記根管溶剤が、テトラヒドロフラン、リモネン、ユーカリ油、クロロホルムおよびキシレン、ベンゼン、トルエンまたはそれらの混合物を含む、請求項8に記載の充填材。
- 前記第1の熱可塑性ポリママトリックスおよび前記第2の熱可塑性ポリママトリックスが、ガッタパーチャを含まない、請求項1に記載の充填材。
- 前記第1の熱可塑性ポリママトリックス材中の生分解性ポリマが前記内側コアの10重量%〜100重量%の量で存在し、前記第2の熱可塑性マトリックス中の生分解性ポリマが前記外層材の10重量%〜100重量%の量で存在する、請求項1に記載の充填材。
- 前記生物活性フィラーが、前記内側コアの最大90重量%の量で存在し、前記生物活性フィラーが前記外層材の最大90重量%の量で存在する、請求項1に記載の充填材。
- 前記生分解性ポリマが、ポリラクチド類、ポリグリコリド類、ポリカプロラクトン類およびそれらのコポリマ類もしくは混合物を含む、請求項11に記載の充填材。
- 前記生物活性フィラーが、バイオガラス、リン酸カルシウム、ポルトランドセメント、ヒドロキシアパタイト、リン酸三カルシウム、ジまたはポリホスホン酸、抗エストロゲン、フッ化ナトリウム調製物、リン酸対カルシウムの比率が天然の骨と類似する物質またはそれらの混合物を含む、請求項1に記載の充填材。
- 前記生物活性フィラーが、骨粉、骨結晶、骨もしくは歯のミネラル画分またはそれらの混合物を含む、請求項1に記載の充填材。
- 前記生物活性フィラーが、ナノサイズ、マイクロサイズ、マクロサイズ形態の微粒子フィラーもしくは繊維フィラーまたはそれらの混合物を含む、請求項1に記載の充填材。
- 前記内側コア部分および前記外層材が、各々可塑剤をさらに含む、請求項1に記載の充填材。
- 前記可塑剤が前記内側コア部分の最大90重量%の量で、および前記外層材の最大90重量%の量で存在する、請求項18に記載の充填材。
- 前記可塑剤がポリオール、ポリオルフィンまたはそれらの混合物を含む、請求項18に記載の充填材。
- 前記内側コア部分および前記外層材が、各々接着剤をさらに含む、請求項1に記載の充填材。
- 前記接着剤がアクリレート、メタクリレートまたはそれらの混合物を含む、請求項21に記載の充填材。
- 前記内側コア部分および前記外層材が、各々、ポリマ樹脂、追加のフィラー、顔料、染料、抗生物質、抗齲蝕性物質、抗菌性物質、抗炎症性物質、生物学的に活性な物質、治療物質またはそれらの混合物をさらに含む、請求項1に記載の充填材。
- 前記ポリマ樹脂が、ポリアミド類、ポリエステル類、ポリオレフィン類、ポリイミド類、ポリアリーレート類、ポリウレタン類、ビニルエステル類、エポキシ系材料、スチレン類、スチレンアクリロニトリル類、ABSポリマ類、ポリスルホン類、ポリアセタール類、ポリカーボネート類、ポリフェニレンスルフィド類、ポリアリールスルフィド類、アクリロニトリル−ブタジエン−スチレンコポリマ類、ポリウレタンジメタクリレート類、トリエチレングリコールジメタクリレート、ポリエチレングリコールジメタクリレート、ウレタンジメタクリレート、ヘキサンジオールジメタクリレート、ポリカーボネートジメタクリレート、ビスフェノールAとグリシジルメタクリレートの縮合生成物、2,2’−ビス[4−(3−メタクリルオキシ−2−ヒドロキシプロポキシ)−フェニル]−プロパンおよびそれらの混合物を含む、請求項23に記載の充填材。
- 前記追加のフィラーが放射線不透過性(radiopacifying)フィラーを含む、請求項23に記載の充填材。
- 前記追加のフィラーが、シリカ、シリケートガラス、石英、酸化亜鉛、硫酸バリウム、ケイ酸バリウム、ケイ酸ストロンチウム、ホウケイ酸バリウム、ホウケイ酸ストロンチウム、ボロシリケート、ケイ酸リチウム、アモルファスシリカ、ビスマス化合物BiOCl、ジルコニア、酸化スズおよびチタニア、アパタイト類、シリカガラスフィラー、ケイ酸カルシウム系フィラー、ヒドロキシアパタイト類、硫酸バリウム、次炭酸ビスマスまたはそれらの混合物を含む、請求項23に記載の充填材。
- 前記追加のフィラーが繊維フィラーを含む、請求項23に記載の充填材。
- 前記繊維フィラーがガラス、セラミック、金属、炭素、グラファイトまたはポリマ繊維を含む、請求項27に記載の充填材。
- 前記ポリマ繊維が、セルロース、ポリアミド、アラミド、ポリエステル、ポリアラミド、アクリル、ビニル、モダクリル、ポリオレフィン、ポリテトラフルオロエチレンまたはそれらの混合物を含む、請求項28に記載の充填材。
- 円錐の形に成形されていることを含む、請求項1に記載の充填材。
- 管に投与するためのディスペンシング装置に充填されていることを含む、請求項1に記載の充填材。
- 歯の根管に充填材を適用する器具であって、
第1の熱可塑性ポリママトリックス材を含む第1の充填剤から作られたシャフトと、
前記シャフトの末端上に配置される外層材であって、第2の熱可塑性ポリママトリックス材を含む第2の充填剤を含み、前記第2の充填剤の接着強度が、根管シーラントと接着した場合に3MPa以上である外層材と、
を備え、
前記第1および前第2の熱可塑性ポリママトリックス材が、各々生物活性フィラーを任意選択で含み、
前記第1の熱可塑性ポリママトリックス材および前記第2の熱可塑性ポリママトリックス材が異なるメルトフローインデックスを有する生分解性ポリマを含み、前記第1の熱可塑性ポリママトリックス中のポリマが前記第2の熱可塑性マトリックス中のポリマよりもより低いメルトフローインデックスを有し、
前記第1の熱可塑性ポリママトリックスのメルトフローインデックスが0.1〜4.0グラム/分であり、前記第2の熱可塑性ポリママトリックスのメルトフローインデックスが4.5〜20.0グラム/分である器具。 - 前記第1の熱可塑性ポリママトリックス材のメルトフローインデックスが0.5〜3.0グラム/分である、請求項32に記載の器具。
- 前記第2の熱可塑性ポリママトリックスのメルトフローインデックスが5.0〜15.0グラム/分である、請求項32に記載の器具。
- 前記第1の熱可塑性ポリママトリックス中のポリマが前記第2の熱可塑性マトリックス中のポリマよりもより大きな分子量を有する、請求項32に記載の器具。
- 前記第1の熱可塑性マトリックス材と前記第2の熱可塑性マトリックス材が同一のポリマを含む、請求項32に記載の器具。
- 前記ポリマの融点が60〜100℃の範囲である、請求項35に記載の器具。
- 前記シャフトおよび前記外層材が根管溶剤に溶解可能である、請求項32に記載の器具。
- 前記根管溶剤が塩素系溶剤を含む、請求項38に記載の器具。
- 前記根管溶剤が、テトラヒドロフラン、リモネン、ユーカリ油、クロロホルムおよびキシレン、ベンゼン、トルエンまたはそれらの混合物を含む、請求項38に記載の器具。
- 前記第1の熱可塑性ポリママトリックスおよび前記第2の熱可塑性ポリママトリックスが、各々生分解性ポリマを含む、請求項32に記載の器具。
- 前記第1の熱可塑性ポリママトリックス材中の生分解性ポリマが前記シャフトの10重量%〜100重量%の量で存在し、前記外層材中の前記第2の熱可塑性マトリックス中の生分解性ポリマが前記外層材の10重量%〜100重量%の量で存在する、請求項32に記載の器具。
- 前記生物活性フィラーが、前記シャフトの最大90重量%の量で存在し、前記生物活性フィラーが前記外層材の最大90重量%の量で存在する、請求項32に記載の器具。
- 前記生分解性ポリマが、ポリラクチド類、ポリグリコリド類、ポリカプロラクトン類およびそれらのコポリマ類もしくは混合物を含む、請求項41に記載の器具。
- 前記生物活性フィラーが、バイオガラス、リン酸カルシウム、ポルトランドセメント、ヒドロキシアパタイト、リン酸三カルシウム、ジまたはポリホスホン酸、抗エストロゲン、フッ化ナトリウム調製物、リン酸対カルシウムの比率が天然の骨と類似する物質またはそれらの混合物を含む、請求項32に記載の器具。
- ハンドルをさらに備える、請求項32に記載の器具。
- 前記ハンドルが前記シャフトと同一材料から作られている、請求項46に記載の器具。
- 前記ハンドルが前記シャフトの延長部分であり、かつ、構成要素である、請求項47に記載の器具。
- 第1の熱可塑性ポリママトリックス材を含むポスト部分と、
根管シーラントと接着した場合に接着強度が3MPa以上である、第2の熱可塑性ポリママトリックス材を含有する充填材を含むチップ部分と、
を備え、
前記第1および第2の熱可塑性ポリママトリックス材が生物活性フィラーを任意選択で含み、
前記第1の熱可塑性ポリママトリックス材および前記第2の熱可塑性ポリママトリックス材が異なるメルトフローインデックスを有する生分解性ポリマを含み、前記第1の熱可塑性ポリママトリックス中のポリマが前記第2の熱可塑性マトリックス中のポリマよりもより低いメルトフローインデックスを有し、
前記第1の熱可塑性ポリママトリックスのメルトフローインデックスが0.1〜4.0グラム/分であり、前記第2の熱可塑性ポリママトリックスのメルトフローインデックスが4.5〜20.0グラム/分である歯内療法用ポスト。 - 前記チップ部分が前記ポスト部分の一体部分である、請求項49に記載の歯内療法用ポスト。
- 前記第1の熱可塑性ポリママトリックス材のメルトフローインデックスが0.5〜3.0グラム/分である、請求項49に記載の歯内療法用ポスト。
- 前記第2の熱可塑性ポリママトリックス材のメルトフローインデックスが5.0〜15.0グラム/分である、請求項49に記載の歯内療法用ポスト。
- 第1の熱可塑性ポリママトリックス材が第2の熱可塑性マトリックスよりもより大きな分子量を有する、請求項49に記載の歯内療法用ポスト。
- 前記第1の熱可塑性マトリックス材と前記第2の熱可塑性マトリックス材が同一ポリマを含む、請求項49に記載の歯内療法用ポスト。
- 前記第2の熱可塑性マトリックス材中の生分解性ポリマの融点が60〜100℃の範囲である、請求項51に記載の歯内療法用ポスト。
- 前記ポスト部分および前記チップ部分が根管溶剤に溶解可能である、請求項49に記載の歯内療法用ポスト。
- 前記根管溶剤が塩素系溶剤を含む、請求項56に記載の歯内療法用ポスト。
- 前記根管溶剤が、テトラヒドロフラン、リモネン、ユーカリ油、クロロホルムおよびキシレン、ベンゼン、トルエンまたはそれらの混合物を含む、請求項56に記載の歯内療法用ポスト。
- 前記第1の熱可塑性ポリママトリックス材が前記ポスト部分の10重量%〜100重量%の量で存在し、前記第2の熱可塑性マトリックスが前記チップ部分の10重量%〜100重量%の量で存在する、請求項49に記載の歯内療法用ポスト。
- 前記生物活性フィラーが、前記ポスト部分の最大90重量%の量で存在し、前記生物活性フィラーが前記チップ部分の最大90重量%の量で存在する、請求項49に記載の歯内療法用ポスト。
- 前記生分解性ポリマが、ポリラクチド類、ポリグリコリド類、ポリカプロラクトン類およびそれらのコポリマ類もしくは混合物を含む、請求項49に記載の歯内療法用ポスト。
- 前記生物活性フィラーが、バイオガラス、リン酸カルシウム、ポルトランドセメント、ヒドロキシアパタイト、リン酸三カルシウム、ジまたはポリホスホン酸、抗エストロゲン、フッ化ナトリウム調製物、リン酸対カルシウムの比率が天然の骨と類似する物質またはそれらの混合物を含む、請求項49に記載の歯内療法用ポスト。
- 前記生物活性フィラーが、骨粉、骨結晶、骨もしくは歯のミネラル画分またはそれらの混合物を含む、請求項49に記載の歯内療法用ポスト。
- 前記生物活性フィラーが、ナノサイズ、マイクロサイズ、マクロサイズ形態の微粒子フィラーもしくは繊維フィラーまたはそれらの混合物を含む、請求項49に記載の歯内療法用ポスト。
- 前記第1の熱可塑性マトリックス材および前記第2の熱可塑性マトリックス材が、各々、可塑剤をさらに含む、請求項49に記載の歯内療法用ポスト。
- 前記可塑剤が前記第1の熱可塑性マトリックス材の最大90重量%の量で、および前記第2の熱可塑性マトリックス材の最大90重量%の量で存在する、請求項65に記載の歯内療法用ポスト。
- 前記可塑剤がポリオール、ポリオルフィンまたはそれらの混合物を含む、請求項65に記載の歯内療法用ポスト。
- 前記第1の熱可塑性マトリックス材および前記第2の熱可塑性マトリックス材が、各々、接着剤をさらに含む、請求項49に記載の歯内療法用ポスト。
- 前記接着剤がアクリレート、メタクリレートまたはそれらの混合物を含む、請求項68に記載の歯内療法用ポスト。
- 前記第1の熱可塑性マトリックス材および前記第2の熱可塑性マトリックス材が、各々、ポリマ樹脂、追加のフィラー、顔料、染料、抗生物質、抗齲蝕性物質、抗菌性物質、抗炎症性物質、生物学的に活性な物質、治療物質またはそれらの混合物をさらに含む、請求項49に記載の歯内療法用ポスト。
- 前記ポリマ樹脂が、ポリアミド類、ポリエステル類、ポリオレフィン類、ポリイミド類、ポリアリーレート類、ポリウレタン類、ビニルエステル類、エポキシ系材料、スチレン類、スチレンアクリロニトリル類、ABSポリマ類、ポリスルホン類、ポリアセタール類、ポリカーボネート類、ポリフェニレンスルフィド類、ポリアリールスルフィド類、アクリロニトリル−ブタジエン−スチレンコポリマ類、ポリウレタンジメタクリレート類、トリエチレングリコールジメタクリレート、ポリエチレングリコールジメタクリレート、ウレタンジメタクリレート、ヘキサンジオールジメタクリレート、ポリカーボネートジメタクリレート、ビスフェノールAとグリシジルメタクリレートの縮合生成物、2,2’−ビス[4−(3−メタクリルオキシ−2−ヒドロキシプロポキシ)−フェニル]−プロパンおよびそれらの混合物含む、請求項70に記載の歯内療法用ポスト。
- 前記追加のフィラーが放射線不透過性(radiopacifying)フィラーを含む、請求項70に記載の歯内療法用ポスト。
- 前記追加のフィラーが、シリカ、シリケートガラス、石英、酸化亜鉛、硫酸バリウム、ケイ酸バリウム、ケイ酸ストロンチウム、ホウケイ酸バリウム、ホウケイ酸ストロンチウム、ボロシリケート、ケイ酸リチウム、アモルファスシリカ、ビスマス化合物BiOCl、ジルコニア、酸化スズおよびチタニア、アパタイト類、シリカガラスフィラー、ケイ酸カルシウム系フィラー、ヒドロキシアパタイト類、硫酸バリウム、次炭酸ビスマスまたはそれらの混合物を含む、請求項70に記載の歯内療法用ポスト。
- 前記追加のフィラーが繊維フィラーを含む、請求項70に記載の歯内療法用ポスト。
- 前記繊維フィラーが、ガラス、セラミック、金属、炭素、グラファイトまたはポリマ繊維を含む、請求項74に記載の歯内療法用ポスト。
- 前記ポリマ繊維が、セルロース、ポリアミド、アラミド、ポリエステル、ポリアラミド、アクリル、ビニル、モダクリル、ポリオレフィン、ポリテトラフルオロエチレンまたはそれらの混合物を含む、請求項75に記載の歯内療法用ポスト。
- 窩洞および根管のための充填材であって、
第1の熱可塑性ポリママトリックス材を含む内側コア部分と、
前記内側コア部分上に配置され、前記内側コア部分を取り囲んでいる外層材であって、第2の熱可塑性ポリママトリックス材を含む外層材と、
を備え、
前記充填剤が、根管シーラントに接着した場合に3MPa以上の接着強度を有し、前記第1および第2の熱可塑性ポリママトリックスが生物活性フィラーを任意選択で含み、
前記第1の熱可塑性ポリママトリックス材と前記第2の熱可塑性ポリママトリックス材が異なるメルトフローインデックスを有する生分解性ポリマを含み、
前記第1の熱可塑性ポリママトリックス中のポリマが前記第2の熱可塑性マトリックス中のポリマよりも低いメルトフローインデックスを有し、
前記充填剤が、第1の熱可塑性ポリママトリックス材を含む内側コア部分と、前記内側コア部分上に配置され、前記内側コア部分を取り囲んでいる外層材であって、第2の熱可塑性ポリママトリックス材を含む外層材とを備え、前記充填剤が、根管シーラントに接着した場合に3MPa以上の接着強度を有し、前記第1および第2の熱可塑性ポリママトリックスが生物活性フィラーを任意選択で含み、前記第1の熱可塑性ポリママトリックス材と前記第2の熱可塑性ポリママトリックス材が異なるメルトフローインデックスを有するポリマを含み、前記第1の熱可塑性ポリママトリックス中のポリマが前記第2の熱可塑性マトリックス中のポリマよりも低いメルトフローインデックスを有し、
前記第1の熱可塑性ポリママトリックスのメルトフローインデックスが0.1〜4.0グラム/分であり、前記第2の熱可塑性ポリママトリックスのメルトフローインデックスが4.5〜20.0グラム/分であり、
前記第1の熱可塑性ポリママトリックス材および前記第2の熱可塑性ポリママトリックス材がポリイソプレンを含まない充填剤。 - 窩洞および根管のための充填材であって、
第1の熱可塑性ポリママトリックス材を含む内側コア部分と、
前記内側コア部分上に配置され、前記内側コア部分を取り囲んでいる外層材であって、第2の熱可塑性ポリママトリックス材を含む外層材と、
を備え、
前記充填剤が、根管シーラントに接着した場合に3MPa以上の接着強度を有し、
前記第1の熱可塑性ポリママトリックス材と前記第2の熱可塑性ポリママトリックス材が異なるメルトフローインデックスを有する生分解性ポリマを含み、前記第1の熱可塑性ポリママトリックス中のポリマが前記第2の熱可塑性マトリックス中のポリマよりも低いメルトフローインデックスを有し、
前記第1の熱可塑性ポリママトリックスのメルトフローインデックスが0.1〜4.0グラム/分であり、前記第2の熱可塑性ポリママトリックスのメルトフローインデックスが4.5〜20.0グラム/分であり、
前記充填剤は、スプリットチャンバー微生物漏出モデルを用い、30日にわたる期間で漏出を試験した場合に細菌漏出率が13%以下であり、
前記スプリットチャンバー微生物漏出モデルが、上部チャンバーと、下部チャンバーと、前記上部と下部チャンバーの間に配置され、前記上部と下部チャンバーを接続する充填された管とを備え、
前記上部チャンバーが細菌を含み、
前記下部チャンバーがブロスを含み、
前記下部チャンバー中のブロスの元の色の変化によって漏出を検出する充填材。 - 前記下部チャンバー中の細菌の存在が前記ブロスの色を変更する、請求項78に記載の充填材。
- 窩洞および根管のための充填材であって、
第1の熱可塑性ポリママトリックス材を含む内側コア部分と、
前記内側コア部分上に配置され、前記内側コア部分を取り囲んでいる外層材であって、第2の熱可塑性ポリママトリックス材を含む外層材とを備え、
前記充填剤が、根管シーラントに接着した場合に3MPa以上の接着強度を有し、
前記第1の熱可塑性ポリママトリックス材と前記第2の熱可塑性ポリママトリックス材が異なるメルトフローインデックスを有する生分解性ポリマを含み、前記第1の熱可塑性ポリママトリックス中のポリマが前記第2の熱可塑性マトリックス中のポリマよりも低いメルトフローインデックスを有し、
前記第1の熱可塑性ポリママトリックスのメルトフローインデックスが0.1〜4.0グラム/分であり、前記第2の熱可塑性ポリママトリックスのメルトフローインデックスが4.5〜20.0グラム/分であり、
前記充填剤は、スプリットチャンバー微生物漏出モデルを用い、30日にわたる期間で漏出を試験した場合に細菌漏出率が13%以下であり、
前記スプリットチャンバー微生物漏出モデルが、上部チャンバーと、下部チャンバーと、前記上部と下部チャンバーの間に配置され、前記上部と下部チャンバーを接続する充填された管とを備え、
前記上部チャンバーが細菌を含み、
前記下部チャンバーがブロスを含み、
前記下部チャンバー中のブロスのpHの変化によって漏出を検出する充填材。 - 前記充填材と前記根管シーラントの間の接着強度が、
充填材のディスクを製造するステップと、
前記ディスクの一面を露出したままにするステップと、
前記ディスクの露出された面にセメントシーラントを塗布するステップと、
前記シーラントを硬化させるステップと、
プッシュシヤーモールドでサンプルを剥離するステップと、
セメントシリンダーが前記サンプルの表面から離れる最大負荷を記録するステップと、
前記セメントシリンダーの接触表面積で除した負荷を用いて前記接着強度を算出するステップと、
によって測定される、請求項1に記載の充填材。
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2004
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- 2004-09-02 JP JP2007524779A patent/JP4954072B2/ja not_active Expired - Fee Related
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WO2006022747A1 (en) | 2006-03-02 |
ATE510514T1 (de) | 2011-06-15 |
CN101014297B (zh) | 2011-09-07 |
US7303817B2 (en) | 2007-12-04 |
US20080020353A1 (en) | 2008-01-24 |
EP1773234B1 (en) | 2011-05-25 |
BRPI0418972B1 (pt) | 2015-07-14 |
US7837471B2 (en) | 2010-11-23 |
CN101014297A (zh) | 2007-08-08 |
MX2007001344A (es) | 2008-03-11 |
BRPI0418972A (pt) | 2007-12-04 |
EP1773234A1 (en) | 2007-04-18 |
BRPI0418972B8 (pt) | 2021-07-27 |
JP2008509135A (ja) | 2008-03-27 |
US20050066854A1 (en) | 2005-03-31 |
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