JP5575649B2 - 生体侵食性金属−バイオセラミック複合材から形成されたステント - Google Patents
生体侵食性金属−バイオセラミック複合材から形成されたステント Download PDFInfo
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- JP5575649B2 JP5575649B2 JP2010527066A JP2010527066A JP5575649B2 JP 5575649 B2 JP5575649 B2 JP 5575649B2 JP 2010527066 A JP2010527066 A JP 2010527066A JP 2010527066 A JP2010527066 A JP 2010527066A JP 5575649 B2 JP5575649 B2 JP 5575649B2
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- Prior art keywords
- stent
- metal
- bioceramic particles
- particles
- bioceramic
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L31/148—Materials at least partially resorbable by the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/12—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
- A61L31/121—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix
- A61L31/124—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix of other specific inorganic materials not covered by A61L31/122 or A61L31/123
Description
特定の実施の形態においては、侵食性の金属は、インビボ(生体内)の環境において自己崩壊の傾向を有する金属である。体液にさらされた場合、インビボ(生体内)の環境において自己崩壊する金属は腐食および解体される。自己溶解金属については、患者に対する有害作用をほとんどまたはまったく有していないものを選択することができる。インビボ(生体内)の環境における自己溶解金属の代表的な例は、マグネシウム、マンガン、カルシウム、亜鉛、クロミウム、鉄、カドミウム、アルミニウム、コバルト、アンチモン、スズ、バナジウム、銅、タングステン、およびモリブデンを含むが、これらに限定されない。
45S5:46.1mol% SiO2、26.9mol% CaO、24.4mol% Na2O、および2.5mol% P2O5;
58S:60mol% SiO2、36mol% CaO、および4mol% P2O5;および
S70C30:70mol% SiO2、30mol% CaO。
他の市販で入手可能なガラスセラミックはA/Wである。
工程1 複合材の調製:1kgのマグネシウム合金を機械的ブレンダーの中で100gのナノHAPと室温で混合する。混合物は、プラーを備えた一軸スクリュー押出機または二軸スクリュー押出機を介して400℃で押出される。押し出されたチューブは、内径=0.128インチおよび外径=0.136インチを有する。
工程2 ステントの調製:チューブはレーザーによってステントへと切断され、より小さな直径(0.05インチ)に圧着される。
110 構造要素
120 構造要素部分(略直線状)
130 構造要素部分(湾曲部分)
140 構造要素部分(湾曲部分)
150 構造要素部分(湾曲部分)
200 構造要素のセクション
210 構造要素のセクションの一部
220 バイオセラミック粒子
230 侵食性の金属マトリックス
Claims (9)
- 金属マトリックス複合材から形成されたステント素地により構成されたステントであって、前記金属マトリックス複合材は侵食性の金属内に分散させた侵食性のバイオセラミック粒子を有し、前記分散させたバイオセラミック粒子は、血管環境中の前記ステント素地の侵食速度を変更するとともに、前記ステント素地の機械的性質を増強するように構成され、前記バイオセラミック粒子の侵食が前記侵食性の金属の侵食速度を低下させ、その結果として完全に前記ステントが吸収されるまでの時間を増加させるように構成され、
前記バイオセラミック粒子は、前記侵食性の金属の腐食環境のpHを増加させる塩基性の分解産物を有し、それによって前記侵食性の金属の侵食速度を低下させるように構成された、ステント。 - 前記金属マトリックス複合材は、前記バイオセラミック粒子を1重量%〜5重量%の値の範囲で含むように設けられた、請求項1に記載のステント。
- 前記ステントが完全に吸収されるまでの時間が6か月より長くなるように設けられた、請求項1又は請求項2に記載のステント。
- 前記バイオセラミック粒子は、ヒドロキシアパタイト、リン酸三カルシウム、およびそれらの組合せからなる群から選択される、請求項1乃至請求項3のいずれか一項に記載のステント。
- 前記侵食性の金属は、マグネシウム、鉄、亜鉛、タングステン、およびそれらの合金からなる群から選択される、請求項1乃至請求項4のいずれか一項に記載のステント。
- 前記バイオセラミック粒子が前記金属マトリックス複合材の引張強度を増加させる、請求項1乃至請求項5のいずれか一項に記載のステント。
- 前記金属マトリックス複合材は多孔性に設けられた、請求項1乃至請求項6のいずれか一項に記載のステント。
- バイオセラミック粒子の凝集を減少するために、前記凝集したバイオセラミック粒子のクラスターの破壊強度よりも高い剪断応力を侵食性の金属と前記バイオセラミック粒子とに負荷するように処理をおこなうことにより前記侵食性の金属に前記バイオセラミック粒子を分散させて金属マトリックス複合材を形成する工程と;
前記金属マトリックス複合材からチューブを形成する工程と;
前記分散されたバイオセラミック粒子が血管環境中のステント素地の侵食速度を変更するとともに、前記ステント素地の機械的特性を増強するように設けられ、前記バイオセラミック粒子の侵食が前記侵食性の金属の侵食速度を低下させ、その結果として完全に前記ステント素地が吸収されるまでの時間を増加させるように構成されたステントを前記チューブから製造する工程とを備える;
ステントを製造する方法。 - 前記バイオセラミック粒子と前記侵食性の金属とを処理する工程は、前記バイオセラミック粒子と前記侵食性の金属とを二軸スクリュー押出機または捏和機による処理により凝集が減少するように混ぜる処理を有するように構成された、請求項8に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/864,737 US8998978B2 (en) | 2007-09-28 | 2007-09-28 | Stent formed from bioerodible metal-bioceramic composite |
US11/864,737 | 2007-09-28 | ||
PCT/US2008/077246 WO2009045773A2 (en) | 2007-09-28 | 2008-09-22 | Stent formed from bioerodible metal-bioceramic composite |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2010540092A JP2010540092A (ja) | 2010-12-24 |
JP2010540092A5 JP2010540092A5 (ja) | 2011-11-04 |
JP5575649B2 true JP5575649B2 (ja) | 2014-08-20 |
Family
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Application Number | Title | Priority Date | Filing Date |
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JP2010527066A Expired - Fee Related JP5575649B2 (ja) | 2007-09-28 | 2008-09-22 | 生体侵食性金属−バイオセラミック複合材から形成されたステント |
Country Status (5)
Country | Link |
---|---|
US (2) | US8998978B2 (ja) |
EP (2) | EP2392366B1 (ja) |
JP (1) | JP5575649B2 (ja) |
AT (1) | ATE530211T1 (ja) |
WO (1) | WO2009045773A2 (ja) |
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2007
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2008
- 2008-09-22 EP EP11178979.8A patent/EP2392366B1/en not_active Not-in-force
- 2008-09-22 AT AT08835668T patent/ATE530211T1/de not_active IP Right Cessation
- 2008-09-22 EP EP08835668A patent/EP2209507B1/en not_active Not-in-force
- 2008-09-22 JP JP2010527066A patent/JP5575649B2/ja not_active Expired - Fee Related
- 2008-09-22 WO PCT/US2008/077246 patent/WO2009045773A2/en active Application Filing
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2011
- 2011-06-08 US US13/155,936 patent/US20110238155A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP2392366B1 (en) | 2013-09-18 |
EP2209507B1 (en) | 2011-10-26 |
WO2009045773A2 (en) | 2009-04-09 |
US8998978B2 (en) | 2015-04-07 |
ATE530211T1 (de) | 2011-11-15 |
EP2392366A1 (en) | 2011-12-07 |
US20090088834A1 (en) | 2009-04-02 |
EP2209507A2 (en) | 2010-07-28 |
JP2010540092A (ja) | 2010-12-24 |
US20110238155A1 (en) | 2011-09-29 |
WO2009045773A3 (en) | 2010-03-04 |
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