JP5467443B2 - 複合材料骨修復材料 - Google Patents
複合材料骨修復材料 Download PDFInfo
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- JP5467443B2 JP5467443B2 JP2010515382A JP2010515382A JP5467443B2 JP 5467443 B2 JP5467443 B2 JP 5467443B2 JP 2010515382 A JP2010515382 A JP 2010515382A JP 2010515382 A JP2010515382 A JP 2010515382A JP 5467443 B2 JP5467443 B2 JP 5467443B2
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- bone repair
- bone
- repair material
- scaffold
- ceramic
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Description
大部分に耐える高密度皮質部を含む主要な層としてのアパタイト層、そして急速な血液/体液透過率及び組織内部成長を可能とする多孔性網状部分を有する硬化リン酸カルシウムセメントで作成されている。あるいは、欧州特許出願公開第1457214号明細書は、改善された強度を有する分解性ポリマーで作成された重畳皮膚層を有するブロック状の有機−無機複合体多孔質製品を開示している。該複合体は、主に椎体の間に挿入されるよう設計される。
吸収を増す重要な特性の1つである大きな特有の面密度を生じる。特有の面密度は、足場
容量あたりの足場表面として定義される。本発明による好ましい足場材料は、少なくとも20/mm、より好ましくは30/mmを超える特有の表面密度を有する。さらに、好ましいセラミック足場材料は、最適な栄養素及び酸素供給、新血管形成、細胞移動、コロニー形成及び骨沈着を促進する。最後に、該材料は新たに形成した骨に統合されそして最終的に分解されそして自然骨に置き換えられる。
細孔の数に相当する、細孔あたりの連結の観点において、本発明の足場材料は、少なくとも2、より好ましくは3より大きい、細孔あたりの連結性を有する。上記のように、多孔性は不規則な分布である必要はないが、しかし細管のような十分に繰り返された空間構造により得られ得る。高度な機械的強度が必要とされる場合には、好適な安定化ポリマーを有する管状構造が好ましいものであり得る。
れるのに十分剛体なものであり得る。本発明の実施態様の基本的な形態において、セラミック足場材料は、セラミック骨修復材料の所望の第2のスラリーへ該部分を浸漬することにより得られる、表面部分上の少なくとも1つの剛体層を有する。末梢部は、1つ又は幾
つかの予め形成された固定穴部を含み得る。
基、エチル基、プロピル基又はブチル基を表す。好ましくは、前駆体Aは、2乃至6個の鎖を有するPEG−アクリレート(2−アーム型乃至6−アーム型のPEG−アクリレート)である。
ブロックの細孔内部のゲルによってそれが吸着することを可能とすることである。この手順は、ブロックを望ましい形態に適合させる前に外科医によって行われ得る。
ここで用いられる生物活性剤は、その由来や製造された方法により限定されるものではないが、それゆえ抽出され得、合成的か又は組み替えて製造され得、そして、接合、断片化、酵素的分割又は化学的変性等であるがこれらに限定されない更なる処理又は精製にかけられ得る。
。好適な活性剤は、トリエタノールアミンをHClを用いてpH7.4乃至9.0とした水溶液であり得る。該キットはまた、1種以上の生物活性剤及び2種以上の前駆体を含み得る。該キットは、プレミックスの形態の一定の成分を含むこともまた可能である。該キットは、乾燥形態又は好適な溶媒(例えば、0.04%酢酸)中に貯蔵され得る。好適な緩衝液溶液は、適用に先立ち迅速に添加される。前駆体は、好ましくは乾燥形態で貯蔵される。生物活性剤は、セラミック足場に(前もって)吸着され得る。さらに、生物活性剤は、乾燥(凍結乾燥)形態又は好適に緩衝された水溶液中で貯蔵され得る。
メルク S.A.より得られた十分に分散したヒドロキシアパタイトのスラリーをアルコール/結合剤/可塑剤溶液中に調製し、そしてポリウレタンフォームをこのスラリーに含浸した。結合剤/可塑剤ミックスの組成は以下のとおりである:90gポリエチレングリコール♯6000;150gポリ−ビニル ブチラール;240g無水エタノール;600gトリクロロエチレン。このスラリーを以下のバッチ組成を用いて製造した:70gヒドロキシアパタイト;50g 無水エタノール;1g エムフォス(emphos)PS−21A解膠剤;36g結合剤/可塑剤ミックス。市販の高多孔質の、低密度ポリウレタンフォームを使用した(ベルギー、レクティセル(Rercticel)社製)。
フォームを先ずスラリーへ浸漬しそして圧縮及び膨張を繰り返し、全ての細孔壁の完全な被覆を確実にした。この余剰のスラリーを次に除去し、そして被覆されたフォームを乾燥させた。セラミック加工品を、全ての有機物質を完全に焼き切ることを確実にするためにステージ中の含浸したフォームを加熱することにより、そして最後に以下の焼成過程を用いてヒドロキシアパタイトを焼結することにより形成した:90℃/時間で250℃まで、2時間保持;50℃/時間で650℃まで、5時間保持;200℃/時間で1200℃まで、2時間保持、200℃/時間で常温まで冷却。
このセラミック足場材料を1×1×2cm3のブロックに切り分けた。
この実施例の目的は、固定部分を有するブロック状のセラミック足場材料を製造するためのものである。ブロックを、最終の焼成工程の前にブロックの一方を純粋なヒドロキシアパタイトのスラリーへ約1mmの深さで浸漬した点が異なるが実施例1に基づき製造した。その結果、スポンジの浸漬した側の細孔は完全にスラリーで充填された(図4)。
65.5mg(0.0336mmolチオール)のHS−PEG−SH 3.4k(米国アラバマ州ハンツビル、ネクター(Nektar)社製)を0.685mlの0.05%酢酸に溶解し、そして、130.5mg(0.0330mmolアクリレート)の4−アーム型PEG−アクリレート 15k(米国アラバマ州ハンツビル、ネクター社製)を
、0.620mlの100ppmのメチレンブルーを含む0.05%酢酸に溶解した。両方のPEG溶液を0.500mlの0.4Mトリエタノールアミン/HCl緩衝液(pH8.85)と混合し、そして1×1×2cm3に計測した実施例1からの骨ブロックへピ
ペットでゆっくりと取った。この液体は、多孔質のブロックに殆ど充填されそして25℃において約3分でブロックの細孔中にゲルを形成した。このブロックは外科用メスで容易に切ることができそして清浄な切断面を得た。空の細孔を有するブロックを切断した場合は、粉々になることとなった(図4)。
32.4mg(0.0164mmolチオール)のHS−PEG−SH 1.8k((米国アラバマ州ハンツビル、ネクター社製)を0.470mlの0.10Mトリエタノールアミン/HCl pH7.4中に溶解しそして、50μlの10mg/mlのhPTH1-34と混合した。ゲル化工程を、0.10Mトリエタノールアミン/HCl pH7.4に溶解した66.0mg(0.0166mmアクリレート)のPEG−アクリレートを用いて開始した。500μgのPTHを含む、4mlのPBSを添加し最終インキュベーション容量を5ml(100μgPTH/ml)とした。この溶液を37℃(回転攪拌機)でインキュベートしそして同じ試験管(15ml、プラスチック標準試験管)から50μlのサンプルを直接HPLC分析(単回分析)に供するために収集(1.5mlマイクロチューブ、72.690.200、ザルスタッド(Sarstedt)社製)した。全ての実験の間、サンプル容量のロスを補充するために如何なる緩衝液も加えなかった。陽性及び陰性対照を全てのテスト溶液を分析する前と後に分析した。
サンプルは、HPLCシステム(pu880、日本分光(JASCO)株式会社製)から送達される流速0.3ml/分における移動相(30%アセトニトリル[co3c11x、ラボスキャン(Labscan)]、0.9%NaCl)において、TSK SSW2000(18674、4.6×300mm、4μm、ドイツ、トーソーハース、ゲーエムベーハ(TosoHaas,Gmbh)製)において分析(5μl)した。ピークを215nmにおける吸光度を測定することにより検出(オンラインUV−検出器、Jasco1575)し、そしてピーク面積を積分した。
Claims (13)
- 合成セラミック材料を含む多孔質のブロック状の足場及びその中に配された安定化ポリマーを含む、薄切り可能な複合材料骨修復材料であって、前記足場は相互結合したマクロ孔を含み、且つ、80乃至95%の全孔隙率を有し、そして前記安定化ポリマーは少なくとも2種の前駆体分子の架橋マイケル型付加反応により形成される分解性ポリエチレングリコールヒドロゲルであり、前記架橋反応は前駆体分子との間にエステル連鎖を形成し、前記前駆体分子はマルチアーム型PEG−チオール及びマルチアーム型PEG−アクリレートから選択され、前記ヒドロゲルは水に分解可能であるところの、複合材料骨修復材料。
- 前記足場が、リン酸カルシウムを含む合成セラミック材料である、請求項1に記載の複合材料骨修復材料。
- 前記リン酸カルシウムが、ヒドロキシアパタイト及びリン酸三カルシウム又はその混合物からなる群より選ばれる、請求項2に記載の複合材料骨修復材料。
- 前記セラミック足場が、皮質骨と同様の改良された機械的強度を有する少なくとも1種の第2の部分を有する、請求項1乃至3のいずれか1項に記載の複合材料骨修復材料。
- 生物活性剤をさらに含む、請求項1乃至4のいずれか1項に記載の複合材料骨修復材料。
- 前記生物活性剤が安定化ポリマーから放出される、請求項5に記載の複合材料骨修復材料。
- 前記生物活性剤がPTH、BMP及びEMDからなる群から選ばれる、請求項5又は請
求項6に記載の複合材料骨修復材料。 - 以下の工程:
a)多孔質のブロック状の合成セラミック足場を製造すること;
b)マルチ−アーム型PEG−チオールの水溶液を、マルチ−アーム型PEG−アクリレートの水溶液と混合することであり、前記アームの合計数が5か又はそれより多いものである;
c)セラミック骨ブロックを混合物と浸漬すること;
を含む、請求項4に記載の複合材料骨修復材料を製造する方法。 - 前記工程b)の混合物に生物活性剤を添加する、請求項8に記載の方法。
- 多孔質のブロック状のセラミック足場及び安定化ポリマーを含む、請求項1に記載の複合材料骨修復材料を製造するキット。
- a)多孔質のブロック状の合成セラミック足場;
b)マルチ−アーム型PEG−チオール;
c)マルチ−アーム型PEG−アクリレートであって、前記アームの合計の数は、5か又はそれより多いものである;
d)マルチ−アーム型PEG−チオール及びマルチ−アーム型PEG−アクリレートのための緩衝液;
を含む請求項10に記載のキット。 - 生物活性剤をさらに含む、請求項10又は11に記載のキット。
- マルチ−アーム型PEG−チオール又はマルチ−アーム型PEG−アクリレートの何れかとプレミックスされた生物活性剤をさらに含む請求項12に記載のキット。
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EP07013645.2 | 2007-07-12 | ||
PCT/EP2008/005340 WO2009007034A1 (en) | 2007-07-12 | 2008-06-30 | Composite bone repair material |
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CA2693599C (en) | 2015-06-16 |
KR101508285B1 (ko) | 2015-04-08 |
US20100292146A1 (en) | 2010-11-18 |
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EP2014256A1 (en) | 2009-01-14 |
EP2564813A2 (en) | 2013-03-06 |
BRPI0813696B1 (pt) | 2019-04-24 |
KR20100061649A (ko) | 2010-06-08 |
EP2173273B1 (en) | 2014-09-24 |
CA2693599A1 (en) | 2009-01-15 |
WO2009007034A1 (en) | 2009-01-15 |
AU2008274585A1 (en) | 2009-01-15 |
ES2525100T3 (es) | 2014-12-17 |
BRPI0813696B8 (pt) | 2021-06-22 |
AU2008274585B2 (en) | 2014-05-15 |
EP2564813B1 (en) | 2018-11-14 |
BRPI0813696A2 (pt) | 2015-11-03 |
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