JP2010178958A - 生体吸収性インプラント及びその製造方法 - Google Patents
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Abstract
【解決手段】生体吸収性ポリマー及び生体活性セラミックスを含有する複合体と、この複合体に形成された、平均気孔径が300μm以上の気孔及び平均気孔径が1μm以下の微細孔とを有する多孔体から成る生体吸収性インプラント、並びに、生体吸収性ポリマーを第1溶媒に溶解した溶液と生体活性セラミックスとを混合する懸濁液調製工程及び第1溶媒と相溶性を有する生体吸収性ポリマーの非溶媒と前記懸濁液とを混合する複合体析出工程を有する複合体調製工程と、この複合体の顆粒と可溶性物質の顆粒とを混合する顆粒調製工程と、この顆粒混合物を10MPa以下で加熱成形する成形工程と、この成形体を溶媒に浸漬する溶出工程とを含有する生体吸収性インプラントの製造方法。
【選択図】 図1
Description
重量平均分子量240,000、結晶化度70%のポリ−L−乳酸(PLLAと表記することがある。)7gを30mLの1,4−ジオキサンに溶解させて溶液を調製した。この溶液に、平均粒径約1μmのβ−リン酸三カルシウム(以下、β−TCPと表記することがある。)の顆粒3gを投入して、β−TCPをほぼ均一に分散させ、懸濁液を調製した。この懸濁液を、攪拌されている1000mLの純水に一挙に投入してしばらく攪拌を続けた。析出物を個液分離した後に乾燥させて複合体を調製した。
前記成形圧を、60MPaに変更した以外は、実施例1と同様にして比較例1の生体吸収性インプラントを製造した。
(比較例2)
前記1,4−ジオキサンに代えてクロロホルムを用いたこと以外は、実施例1と同様にして比較例2の生体吸収性インプラントを製造した。
(比較例3)
重量平均分子量240,000、結晶化度70%のPLLAの顆粒7gを200℃に加熱して溶融させ、溶融したPLLAに平均粒径約1μmのβ−TCPの顆粒を添加して、β−TCPがほぼ均一に分散するまで混練して、PLLAにβ−TCPが分散してなる複合体を作製した。この複合体を用いたこと以外は、実施例1と同様にして比較例3の生体吸収性インプラントを製造した。
Claims (2)
- 多孔体から成る生体吸収性インプラントであって、
前記多孔体は、生体吸収性ポリマーと前記生体吸収性ポリマーに分散した生体活性セラミックスとを含有する複合体と、前記複合体に形成された、平均気孔径が300μm以上の気孔及び平均気孔径が1μm以下の微細孔とを有して成ることを特徴とする生体吸収性インプラント。 - 生体吸収性ポリマーと生体活性セラミックスとの複合体を調製する複合体調製工程と、
前記複合体の顆粒と可溶性物質の顆粒とを混合して、顆粒混合物を調製する顆粒調製工程と、
前記顆粒混合物を加圧下で加熱成形して、成形体を得る成形工程と、
前記成形体を前記可溶性物質が溶解する溶媒に浸漬して、前記可溶性物質を溶出させる溶出工程とを含有することを特徴とする生体吸収性インプラントの製造方法であって、
前記複合体調製工程は、
前記生体吸収性ポリマーを第1溶媒に溶解した溶液と前記生体活性セラミックスとを混合して、懸濁液を調製する懸濁液調製工程と、
前記懸濁液と、前記第1溶媒と相溶性を有し前記生体吸収性ポリマーを実質的に溶解しない第2溶媒とを混合して、複合体を析出させる複合体析出工程とを有し、
前記成形工程は、10MPa以下の成形圧で加熱成形する
ことを特徴とする生体吸収性インプラントの製造方法。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2014014579A (ja) * | 2012-07-11 | 2014-01-30 | Ngk Spark Plug Co Ltd | 生体インプラント及び生体インプラントの製造方法 |
WO2017090747A1 (ja) * | 2015-11-26 | 2017-06-01 | 株式会社日本医療機器技研 | 生体吸収性ステント |
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JPH04500013A (ja) * | 1988-08-09 | 1992-01-09 | メルク・パテント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | 骨置換および骨結合用ならびに補綴用の新規材料 |
JP2008054908A (ja) * | 2006-08-31 | 2008-03-13 | Gc Corp | 骨補填材 |
JP2008142379A (ja) * | 2006-12-12 | 2008-06-26 | Ngk Spark Plug Co Ltd | 生体材料及び生体材料の製造方法 |
JP2008245775A (ja) * | 2007-03-29 | 2008-10-16 | Ngk Spark Plug Co Ltd | 生体インプラント |
JP2009136652A (ja) * | 2007-11-16 | 2009-06-25 | Takiron Co Ltd | 骨欠損部への充填材料 |
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JPH04500013A (ja) * | 1988-08-09 | 1992-01-09 | メルク・パテント・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | 骨置換および骨結合用ならびに補綴用の新規材料 |
JP2008054908A (ja) * | 2006-08-31 | 2008-03-13 | Gc Corp | 骨補填材 |
JP2008142379A (ja) * | 2006-12-12 | 2008-06-26 | Ngk Spark Plug Co Ltd | 生体材料及び生体材料の製造方法 |
JP2008245775A (ja) * | 2007-03-29 | 2008-10-16 | Ngk Spark Plug Co Ltd | 生体インプラント |
JP2009136652A (ja) * | 2007-11-16 | 2009-06-25 | Takiron Co Ltd | 骨欠損部への充填材料 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2014014579A (ja) * | 2012-07-11 | 2014-01-30 | Ngk Spark Plug Co Ltd | 生体インプラント及び生体インプラントの製造方法 |
WO2017090747A1 (ja) * | 2015-11-26 | 2017-06-01 | 株式会社日本医療機器技研 | 生体吸収性ステント |
CN108289747A (zh) * | 2015-11-26 | 2018-07-17 | 株式会社日本医疗机器技研 | 生物体吸收性支架 |
JPWO2017090747A1 (ja) * | 2015-11-26 | 2018-10-04 | 株式会社 日本医療機器技研 | 生体吸収性ステント |
US11207448B2 (en) | 2015-11-26 | 2021-12-28 | Japan Medical Device Technology Co., Ltd. | Bioabsorbable stent |
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