Hyaluronan (HA) esterification via acylation technique for moldable devices
    12.
    发明授权
    Hyaluronan (HA) esterification via acylation technique for moldable devices 有权
    乙酰透明质酸(HA)通过酰化技术进行酯化反应

    公开(公告)号:US07692000B2

    公开(公告)日:2010-04-06

    申请号:US10571662

    申请日:2004-09-20

    IPC分类号: C08B37/00

    CPC分类号: C08B37/0072

    摘要: A series of novel, melt- or mold-processable HA esters with varying aliphatic chain lengths are synthesized from silyl HA-quaternary (quat.) ammonium salt complex (preferably silyl HA-CTA, a silylated HA complex with cetyltrimethyl ammonium salt). Introduction of aliphatic acyl groups, preferably acid chlorides, to disrupt the strong HA intermolecular bonding, is done via acylation. Acylation takes place at the oxygen of the trimethylsilyloxy group —O—Si(CH3)3 in the silyl HA-CTA by removal of trimethylsilyl groups therefrom. Optionally, crosslinking may be performed during the shaping/molding of the HA esters into a structure/device, or thereafter, if at all. Native HA can then be regenerated/recovered by saponification hydrolysis, removing acyl groups, —CH3(CH2)10CO, and the cetyltrimethyl ammonium salt groups, -CTA, from HA ester. The structure/device of a preselected shape (e.g., porous or solid, bulk structure or fibers) may become a component of an assembly, a product that is further processed, integrated into another component (e.g., laminated, adhered, assembled, further shaped, chemically-intermixed/intermingled), and so on.

    摘要翻译: 从甲硅烷基HA-季(铵)铵盐络合物(优选甲硅烷基HA-CTA,甲硅烷基化的HA配合物与十六烷基三甲基铵盐)合成一系列具有不同脂肪链长度的新型,熔融或可模塑加工的HA酯。 引入脂族酰基,优选酰氯,以破坏强HA分子间键,是通过酰化进行的。 通过从其中除去三甲基甲硅烷基,在甲硅烷基HA-CTA中的三甲基甲硅烷氧基-O-Si(CH 3)3的氧上进行酰化。 任选地,可以在将HA酯成型/成型成结构/装置期间或之后(如果有的话)进行交联。 然后可以通过皂化水解再生/回收天然HA,从HA酯除去酰基,-CH 3(CH 2)10 CO和十六烷基三甲基铵盐基团-CTA。 预选形状(例如,多孔或固体,本体结构或纤维)的结构/装置可以成为组件的组件,进一步加工的产品集成到另一部件中(例如,层压,粘合,组装,进一步成形 ,化学混合/混合)等。

    Method and apparatus for reducing interfacial porosity in a cemented
femoral prosthesis
    13.
    发明授权
    Method and apparatus for reducing interfacial porosity in a cemented femoral prosthesis 失效
    用于减少胶结股骨假体中的界面孔隙度的方法和装置

    公开(公告)号:US5480450A

    公开(公告)日:1996-01-02

    申请号:US16697

    申请日:1993-02-11

    摘要: A diaphragm for minimizing interfacial porosity during the insertion of a femoral component into the cavity in the medullary canal of a femur. By providing a seal around the outer medial, lateral, anterior and posterior surfaces of the component during insertion through the diaphragm, the introduction of pores into the cement during the insertion process is minimized and flow of cement out of the cavity is resisted. The diaphragm may be formed of at least one rigid layer and a resilient layer, the resilient layer providing the desired seal. In another embodiment, the diaphragm may be formed of two stacked discs which permit expansion in two orthogonal directions and which have holes which include seals on the inner surface thereof to provide a seal between the diaphragm and the outer surfaces of the component. In the method of the present invention, a diaphragm is placed over the opening of the cavity to resist the flow of cement out of the cavity to pressurize the cement during insertion of the component, as well as to provide a seal between the diaphragm and the component to resist the introduction of air into the cement. After insertion, the diaphragm is cut or otherwise separated to allow removal thereof.

    摘要翻译: 用于在将股骨部件插入股骨髓腔中的空腔中最小化界面孔隙的隔膜。 通过在插入通过隔膜的过程中在组件的外侧中间,外侧,前后表面附近提供密封,在插入过程中将孔引入到水泥中被最小化,从而阻止了水泥流出空腔。 隔膜可以由至少一个刚性层和弹性层形成,弹性层提供期望的密封。 在另一个实施例中,隔膜可以由允许在两个正交方向上膨胀并且具有在其内表面上包括密封件的孔的两个堆叠盘形成,以在隔膜和部件的外表面之间提供密封。 在本发明的方法中,将膜片放置在空腔的开口上方以抵抗水泥浆流出空腔,以在插入部件期间对水泥进行加压,以及在隔膜和隔膜之间提供密封 组件以抵抗将空气引入水泥中。 插入后,隔膜被切割或以其他方式分离以允许其移除。