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    • 6. 发明公开
    • Hydrogel arthroplasty device
    • 水凝胶关节成形术装置
    • EP2457539A1
    • 2012-05-30
    • EP12156562.6
    • 2008-04-17
    • The Board of Trustees of the Leland Stanford Junior UniversityThe Government of The United States of America as, Represented by the Department of Veterans Affairs
    • Myung, DavidKourtis, LamprosHartmann, LauraFrank, Curtis, W.Goodman, Stuart, B.Carter, Dennis, R
    • A61F2/30A61L27/52
    • An arthroplasty device is provided having an interpenetrating polymer network (IPN) hydrogel that is strain-hardened by swelling and adapted to be held in place in a joint by conforming to a bone geometry. The strain-hardened IPN hydrogel is based on two different networks: (1) a non-silicone network of preformed hydrophilic non-ionic telechelic macromonomers chemically cross-linked by polymerization of its end-groups, and (2) a non-silicone network of ionizable monomers. The second network was polymerized and chemically cross-linked in the presence of the first network and has formed physical cross-links with the first network. Within the IPN, the degree of chemical cross-linking in the second network is less than in the first network. An aqueous salt solution (neutral pH) is used to ionize and swell the second network. The swelling of the second network is constrained by the first network resulting in an increase in effective physical cross-links within the IPN.
    • 提供具有互穿聚合物网络(IPN)水凝胶的关节成形术装置,所述互穿聚合物网络(IPN)水凝胶通过膨胀进行应变硬化并且适合于通过符合骨几何形状而保持在关节中的适当位置。 应变硬化的IPN水凝胶基于两种不同的网络:(1)通过其端基聚合而化学交联的预先形成的亲水性非离子遥爪大分子单体的非有机硅网络,以及(2)非有机硅网络 可电离的单体。 第二个网络在第一个网络的存在下聚合并化学交联,并与第一个网络形成物理交联。 在IPN内,第二网络中的化学交联程度比第一网络中的化学交联程度要低。 使用盐水溶液(中性pH)使第二网络电离和溶胀。 第二网络的膨胀受到第一网络的限制,导致IPN内的有效物理交联增加。