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6 条记录 (耗时 0.011 秒)

    Bone cement and method of preparation
    1.
    发明授权
    Bone cement and method of preparation 失效
    骨水泥及其制备方法

    公开(公告)号：US5902839A

    公开(公告)日：1999-05-11

    申请号：US758680

    申请日：1996-12-02

    申请人： Eugene P. Lautenschlager ,  Jeremy L. Gilbert ,  Peter Monaghan ,  Steven J. Duray ,  Richard L. Wixson

    发明人： Eugene P. Lautenschlager ,  Jeremy L. Gilbert ,  Peter Monaghan ,  Steven J. Duray ,  Richard L. Wixson

    IPC分类号： A61K49/04 ,  A61L24/06 ,  C08K5/18 ,  C08L33/00 ,  A61L25/00

    CPC分类号： A61L24/06 ,  A61K49/0409 ,  C08K5/18 ,  A61L2430/02 ,  Y10S522/902

    摘要： Orthopedic bone cements of low porosity, prepared by mixing together at least two liquid components under conditions that allow only minimal exposure to air, are disclosed. In a preferred system, each liquid component consists essentially of a solution of a linear (non-crosslinked) polymer or copolymer of methyl methacrylate (PMMA) dissolved in a non-crosslinking methyl methacrylate (MMA) monomer, with one such solution also containing an activator and a polymerization inhibitor and a second solution containing an initiator as well as a polymerization inhibitor. No reinforcing fillers are present, although a small amount (no more than 12% by weight of the total cement composition) of a radiopacifier may be included in the composition. Since polymerization is initiated by mixing together two or more liquid solutions, and such mixing may be performed in a mixing chamber in which no air is required or is introduced during the mixing operation, prior problems of cement porosity and weakness resulting from air entrapment are avoided or greatly reduced while the reliability and reproducibility of the mixing operation are greatly improved.

    摘要翻译： 公开了通过在仅允许最少暴露于空气的条件下将至少两种液体组分混合在一起而制备的低孔隙率的骨科骨粘固剂。 在优选的系统中，每个液体组分基本上由溶解在非交联甲基丙烯酸甲酯（MMA）单体中的甲基丙烯酸甲酯（PMMA）的直链（非交联）聚合物或共聚物的溶液与一种这样的溶液组成， 活化剂和阻聚剂以及含有引发剂的第二溶液以及阻聚剂。 不存在增强填料，尽管可以在组合物中包含少量（不超过总水泥组合物的12重量％）的放射性干燥剂。 由于通过将两种或多种液体溶液混合在一起而引发聚合，并且这种混合可以在混合操作期间在其中不需要或引入空气的混合室中进行，因此避免了由空气滞留引起的水泥孔隙和缺陷的先前问题 或大大降低，同时大大提高混合操作的可靠性和再现性。

    Periodontal probe
    4.
    发明授权
    Periodontal probe 失效
    牙周探针

    公开(公告)号：US4203223A

    公开(公告)日：1980-05-20

    申请号：US3130

    申请日：1979-01-12

    申请人： Eugene P. Lautenschlager ,  Peter J. Robinson ,  Randall M. Vitek

    发明人： Eugene P. Lautenschlager ,  Peter J. Robinson ,  Randall M. Vitek

    IPC分类号： A61C3/00 ,  A61C19/04

    CPC分类号： A61C3/00 ,  A61C19/043

    摘要： A force-controlled periodontal probe is disclosed, the probe having a scale-marked shaft slidably carried by an alignment sleeve at the head end of the instrument and urged into a normally extended condition by a thin leaf spring. Measurements of gingival sulcus depths are taken when the force applied by the periodontist to the handle of the instrument and the resistance to further penetration by the tip portion of the shaft have caused the shaft to shift into an indicated displaced position. In that position the spring exerts a predetermined and accurately reproducible probing force.

    摘要翻译： 公开了一种受力控制的牙周探针，探针具有刻度标记的轴，其可由仪器头端处的对准套筒可滑动地承载，并且通过薄片弹簧被推动到正常延伸的状态。 当牙周膜施加的力对仪器的手柄的阻力和轴的尖端部分的进一步穿透力时，牙龈深度的测量已经导致轴移动到指定的位移位置。 在该位置，弹簧施加预定且准确地重现的探测力。