JP7307960B2 - 繊維束補強生体複合医療用インプラント - Google Patents
繊維束補強生体複合医療用インプラント Download PDFInfo
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Description
既存の分解性ポリマー医療用インプラント
補強分解性ポリマー材料
補強分解性ポリマ―材料の分解メカニズム
1.材料の分解率(分解生成物、分解中の局所pHおよびイオンレベル)、
2.インプラントと周囲の局所組織との界面に影響を与える表面特性、
3.抗菌性または骨伝導性などの生物学的効果、
4.滅菌プロセスへの応答(エチレンオキシドガス、ガンマ線、電子ビーム放射など)。
束で繊維を配置することはさらなる強度をもたらす
生体吸収性ポリマー
補強生体吸収性ポリマー
補強繊維
Na2O:10.0~19.0モル%、
CaO:9.0~14.0モル%、
MgO:1.5~8.0モル%、
B2O3:0.5~3.0モル%、
Al2O3:0~0.8モル%、
P2O3:0.1~0.8モル%、
SiO2:67~73モル%、
K2O:0~0.8モル%、
および、より好ましくは、以下のモル%範囲:
Na2O:11.5~13.0モル%、
CaO:9.0~10.0モル%、
MgO:7.0~8.0モル%、
B2O3:1.4~2.0モル%、
P2O3:0.5~0.8モル%、
SiO2:67~70モル%、
K2O:0~0.4モル%。
任意による追加の特徴
医療用インプラント複合構造
穿孔インプラント部品の壁
骨充填剤のケージ
非補強周囲材料による連続繊維補強構造のフレームワーク
製造方法
インプラントの作製
耐荷重機械的強度
持続的な機械的強度
臨床用途
骨プレート
ネジ
ワイヤー/ピン
アンカー
ケーブル、タイ、ワイヤータイ
釘またはロッド
実施例1-生体複合医療用インプラント骨プレート
材料および調製
実施例2-追加の骨プレート試験
方法
結果
実施例3-生体複合医療用インプラント縫合糸アンカー
方法
結果
方法
結果
結果の要約
Claims (17)
- 1つ以上の補強繊維束を含み、各繊維束が軸を有し、前記軸の0~5度以内で前記束の前記軸に沿って整列される複数の繊維と、前記繊維束を結合するポリマーとを含む、医療用インプラントであって、前記ポリマーおよび前記繊維束が、生分解性であり、前記繊維が、各束内で100ミクロン以下分離され、前記補強繊維の少なくとも一部が、連続長であり、前記長さが、前記医療用インプラントの長さの少なくとも100%であり、かつ前記医療用インプラントの長さの最大10,000%であり、各繊維束内の繊維密度が、平均断面積百分率または体積百分率に関して40%~95%の範囲であり、生体複合医療用インプラント内の補強繊維の体積百分率が、20%~50%の範囲であり、前記束の直径が、35~1300ミクロンである、医療用インプラント。
- 前記繊維束が、前記ポリマーに埋め込まれる、または前記繊維束が、前記ポリマーと混合される、請求項1に記載の医療用インプラント。
- 前記繊維束軸に対する前記繊維の前記整列が、0~1度であり、および/または前記束内の繊維間の距離が、0~50ミクロン、0~30ミクロン、0~20ミクロン、もしくは0~10ミクロンの範囲である、請求項1または2に記載の医療用インプラント。
- 前記医療用インプラント内の前記繊維束が、200ミクロン未満、5~60ミクロン、10~40ミクロン、10~30ミクロン、または10~50ミクロン分離される、請求項1~3のいずれか一項に記載の医療用インプラント。
- 前記医療用インプラント内の隣接する繊維束が、15~75度の角度で、または30~60度の角度で互いにオフセットされる、請求項1~4のいずれか一項に記載の医療用インプラント。
- 前記繊維が、補強ミネラル組成物を含み、かつ前記医療用インプラント内のミネラル含有量が、40%~60%w/w、45%~55%w/w、40%~70%w/w、または50%~70%w/wの範囲である、請求項1~5のいずれか一項に記載の医療用インプラント。
- 相溶化剤をさらに含み、前記相溶化剤の重量含有量が、0.5%w/w未満である、請求項1~6のいずれか一項に記載の医療用インプラント。
- 前記ポリマーが、ポリ乳酸ポリマーのL異性体とD異性体とを含み、および/または前記ポリマーのL:D異性体の比が、60:40~98:2、もしくは70:30~96:4の範囲である、請求項1~7のいずれか一項に記載の医療用インプラント。
- 前記ポリマーが、ポリラクチド(PLA)、ポリ-L-ラクチド(PLLA)、ポリ-DL-ラクチド(PDLLA)、ポリ-LD-ラクチド(PLDLA);ポリグリコリド(PGA);グリコリドのコポリマー、グリコリド/トリメチレンカーボネートコポリマー(PGA/TMC);他のPLAコポリマー、例えばラクチド/テトラメチルグリコリドコポリマー、ラクチド/トリメチレンカーボネートコポリマー、ラクチド/d-バレロラクトンコポリマー、ラクチド/ε-カプロラクトンコポリマー、L-ラクチド/DL-ラクチドコポリマー、グリコリド/L-ラクチドコポリマー(PGA/PLLA)、ポリラクチド-コ-グリコリド;PLAのターポリマー、例えばラクチド/グリコリド/トリメチレンカーボネートターポリマー、ラクチド/グリコリド/ε-カプロラクトンターポリマー、PLA/ポリエチレンオキシドコポリマー;ポリデプシペプチド;非対称-3,6-置換ポリ-1,4-ジオキサン-2,5-ジオン;ポリヒドロキシアルカノエート;例えばポリヒドロキシブチレート(PHB);PHB/b-ヒドロキシバレレートコポリマー(PHB/PHV);ポリ-b-ヒドロキシプロピオン酸(PHPA);ポリ-p-ジオキサノン(PDS);ポリ-d-バレロラクトン-ポリ-ε-カプララクトン、ポリ(ε-カプロラクトン-DL-ラクチド)コポリマー;メチルメタクリレート-N-ビニルピロリドンコポリマー;ポリエステルアミド;シュウ酸のポリエステル;ポリジヒドロピラン;ポリアルキル-2-シアノアクリレート;ポリウレタン(PU);ポリビニルアルコール(PVA);ポリペプチド;ポリ-b-リンゴ酸(PMLA):ポリ-b-アルカンビン酸;ポリカーボネート;ポリオルトエステル;ポリリン酸塩;ポリ(エステル無水物);およびそれらの混合物;および砂糖などの、天然高分子;デンプン、セルロースおよびセルロース誘導体、多糖類、コラーゲン、キトサン、フィブリン、ヒアルロン酸、ポリペプチドおよびタンパク質、またはそれらの混合物を含む、請求項1~8のいずれか一項に記載の医療用インプラント。
- 各繊維束が、各束内に3~500の補強繊維、20~300の補強繊維、25~200の補強繊維、3~100の補強繊維、5~50の補強繊維、または8~16の補強繊維を含む、請求項1~9のいずれか一項に記載の医療用インプラント。
- 前記束の直径が、65~650ミクロン、または100~200ミクロンである、請求項1~10のいずれか一項に記載の医療用インプラント。
- 前記繊維束が、円形形態である、または前記繊維束が、卵形形態であり、任意により前記卵形が、x軸対y軸で6:1、4:1、3:1、または2:1の比の繊維を含む、請求項1~11のいずれか一項に記載の医療用インプラント。
- 前記繊維束が、中心を通過する前記束の任意の軸の直径が他の任意の軸の直径の長さの4倍以内、もしくは2倍以内である形状を有する、前記直径が、同一である、または前記繊維束の平均直径が、0.5mm~10mm、1mm~5mm、もしくは1.5mm~3.5mmの範囲である、請求項1~12のいずれか一項に記載の医療用インプラント。
- 前記繊維が、4mm、8mm、12mm、16mm、または20mmよりも長い、請求項1~13のいずれか一項に記載の医療用インプラント。
- 前記長さが、前記医療用インプラントの長さの最大1000%、前記医療用インプラントの長さの最大500%、前記医療用インプラントの長さの最大450%、前記医療用インプラントの長さの最大400%、前記医療用インプラントの長さの最大350%、前記医療用インプラントの長さの最大300%、前記医療用インプラントの長さの最大250%、または前記医療用インプラントの長さの最大200%である、請求項1に記載の医療用インプラント。
- 補強繊維の平均直径が、0.1~100μm、1~20μm、もしくは8~18μmの範囲である、前記医療用インプラント内の繊維間の繊維径の標準偏差が、5μm未満、3μm、もしくは1.5μmである、または生体複合束内の隣接する補強繊維間の距離が、0~50μm、1~30μm、1~20μm、0~25μm、0~15μm、もしくは0~10μmの範囲である、請求項1~15のいずれか一項に記載の医療用インプラント。
- 前記生体複合医療用インプラント内の補強繊維の重量百分率が、20~90%、40%~70、もしくは40%~60%の範囲である、または前記生体複合医療用インプラント内の補強繊維の体積百分率が、10~80%、もしくは20%~50%の範囲である、請求項1~16のいずれか一項に記載の医療用インプラント。
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