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    • 6. 发明授权
    • Phosphate-containing surgical cements
    • 含磷酸盐的外科手术水泥
    • US5218035A
    • 1993-06-08
    • US829891
    • 1992-02-03
    • Sung-Tsuen Liu
    • Sung-Tsuen Liu
    • A61L24/02C04B28/28C04B28/34
    • A61L24/02A61K6/0023A61K6/0038A61K6/0067A61K6/0085A61K6/0215A61K6/0625A61K6/0675C04B28/34C04B2111/00836
    • New surgical cements for use in medical applications such as orthopedic and maxillofacial surgeries and dental applications are disclosed. These surgical cements comprise a hardened cement formed from a mixture comprising a cementing component selected from the group consisting of ceramics having the formulaw(RO)--x(R.sub.2 O)--y(P.sub.2 O.sub.5)--z(X)wherein RO is selected from the group consisting of CaO and mixtures of CaO and MgO, R.sub.2 O is selected from the group consisting of alkali metal oxides and mixtures thereof, X is selected from the group consisting of SO.sub.4 and Cl, and w, x, y and z are the mole fractions of the respective constituents in the ceramic, when X is SO.sub.4, w is in the range of about 0.25 to about 0.5, x is in the range of about 0.05 to about 0.4, y is in the range of about 0.05 to about 0.25 and z is in the range of about 0.01 to about 0.25, and when X is Cl, w is in the range of about 0.25 to about 0.5, x is in the range of about 0.05 to about 0.5, y is in the range of about 0.1 to about 0.25 and z is in the range of about 0.01 to about 0.4 and mixtures thereof; a setting component selected from the group consisting of polyfunctional carboxylic acids containing 2 to about 10 carbon atoms, salts thereof, monobasic phosphate salts and mixtures thereof; and water in an amount effective to form a paste from the mixture which paste hardens into the hardened cement which is biocompatible.
    • 公开了用于诸如矫形和颌面手术以及牙齿应用的医疗应用的新的外科手术水泥。 这些外科手术水泥包括由混合物形成的硬化水泥,所述混合物包含选自具有式w(RO)-x(R2O)-y(P2O5)-z(X)的陶瓷的粘合剂组分,其中RO选自 由CaO和CaO和MgO的混合物组成的组,R2O选自碱金属氧化物及其混合物,X选自SO 4和Cl,w,x,y和z是摩尔分数 的陶瓷中的各成分,当X是SO 4时,w在约0.25至约0.5的范围内,x在约0.05至约0.4的范围内,y在约0.05至约0.25的范围内,并且z 在约0.01至约0.25的范围内,并且当X是Cl时,w在约0.25至约0.5的范围内,x在约0.05至约0.5的范围内,y在约0.1至 约0.25和z在约0.01至约0.4的范围内及其混合物; 选自由2至约10个碳原子的多官能羧酸组成的组的固化组分,其盐,一元磷酸盐及其混合物; 和水,其量有效地从混合物形成糊料,糊料硬化到生物相容的硬化水泥中。
    • 8. 发明授权
    • Method of producing granulated anhydrous dicalcium phosphate
    • 造粒无水磷酸二钙的方法
    • US07273596B2
    • 2007-09-25
    • US11201048
    • 2005-08-10
    • Sung-Tsuen Liu
    • Sung-Tsuen Liu
    • C01B25/32
    • C01B25/322
    • A new and useful method of simultaneously producing and granulating anhydrous dicalcium phosphate is provided. Such a method entails the reaction of concentrated phosphoric acid with a powdered material of lime and/or calcium carbonate in substantially equal stoichiometric amounts, with subsequent, mixing, drying, milling, and sieving to provide the correct target particle size range for the resultant granulated materials. Such specifically produced granulated anhydrous dicalcium phosphate materials exhibit very high available calcium levels, excellent flow characteristics, and very high capability for compression into tablets. Products including such particularly produced granulated anhydrous dicalcium phosphate materials are also encompassed within this invention.
    • 提供了一种同时生产和制粒无水磷酸氢钙的新型有用的方法。 这种方法需要浓缩的磷酸与石灰和/或碳酸钙的粉末材料以基本相等的化学计量的量进行反应,随后进行混合,干燥,研磨和筛分以提供所得颗粒状的正确的目标粒度范围 材料 这种特制的粒状无水磷酸二钙材料表现出非常高的可用钙水平,优异的流动特性和非常高的压缩成片剂的能力。 包括这种特别生产的粒状无水磷酸二钙材料的产品也包括在本发明内。
    • 9. 发明授权
    • Precipitated calcium carbonate
    • 沉淀碳酸钙
    • US06989142B2
    • 2006-01-24
    • US10365992
    • 2003-02-13
    • Sung-Tsuen LiuMichel J. MartinWilliam C. FultzPatrick D. McGill
    • Sung-Tsuen LiuMichel J. MartinWilliam C. FultzPatrick D. McGill
    • A61K7/16C01B31/24C01F5/24C01F11/18
    • A61Q11/00A61K8/19A61K2800/412C01P2004/03C01P2004/50C01P2004/61C01P2006/22C09C1/021
    • An abrasive precipitated calcium carbonate is provided that provides excellent cleaning properties without being excessively abrasive or damaging to gums or tooth surfaces. The abrasive, precipitated calcium carbonate has a primary particle size of about 1 μm to about 4 μm, and an aggregate size of about 3 μm to about 10 μm. Also disclosed is a method for forming calcium carbonate comprising the steps of: providing a reaction medium; introducing carbon dioxide and the calcium hydroxide slurry simultaneously into a reaction medium to form calcium carbonate while maintaining constant pH during calcium carbonate precipitation; and optionally drying the calcium carbonate slurry to form a dried calcium carbonate product. Also disclosed is a dentifrice containing the aforementioned abrasive, precipitated calcium, and one or more ingredients selected from the group consisting of humectants, thickening agents, binders, gums, stabilizing agents, antibacterial agents, fluorides, sweeteners, and surfactants.
    • 提供研磨沉淀碳酸钙,其提供优异的清洁性能,而不会过度磨损或损坏牙龈或牙齿表面。 研磨沉淀碳酸钙的初级粒度为约1〜4μm,骨料粒径为3〜10μm左右。 还公开了一种形成碳酸钙的方法,包括以下步骤:提供反应介质; 将二氧化碳和氢氧化钙浆料同时引入反应介质中以形成碳酸钙,同时在碳酸钙沉淀过程中保持恒定的pH; 并任选地干燥碳酸钙浆料以形成干燥的碳酸钙产品。 还公开了含有上述磨料,沉淀的钙和选自保湿剂,增稠剂,粘合剂,树胶,稳定剂,抗菌剂,氟化物,甜味剂和表面活性剂的一种或多种成分的洁齿剂。
    • 10. 发明授权
    • Thin mineralized collagen membrane and method of making same
    • 薄矿化胶原膜及其制备方法
    • US06417166B2
    • 2002-07-09
    • US09861113
    • 2001-05-19
    • Sung-Tsuen Liu
    • Sung-Tsuen Liu
    • A61K3801
    • A61K38/39A61K9/7007A61K38/1875A61K47/02A61L31/127A61K2300/00C08L89/06
    • A strong, thin flexible mineralized collagen membrane is disclosed that is useful for such medical applications as a barrier for guided tissue regeneration, periodontal defect repair, bone grafts and skin wound repair. The mineralized collagen membrane comprises a substantially homogeneous mineralized collagen composite consisting essentially of about 30% to about 70% by weight of a collagen component and about 30% to about 70% by weight of a calcium phosphate minerals component precipitated from a collagen slurry by a soluble calcium ion-containing solution and a soluble phosphate ion-containing solution. The calcium phosphate minerals component has a mole ratio of calcium to phosphate in the range of about 1.0 to about 2.0. The thin mineralized collagen membrane has a bulk density of the membrane of at least about 1.0 g/cm3 and has a thickness not greater than about 0.5 mm and preferably not greater than about 0.3 mm. A corresponding method of making the mineralized collagen membrane includes casting washed mineralized collagen slurry as a thin, flat sheet onto a surface, such as a sieve or filter paper, air drying the sheet and removing it from the surface as the thin mineralized collagen membrane.
    • 公开了一种强而薄的柔性矿化胶原膜,其可用于诸如用于引导组织再生,牙周缺损修复,骨移植和皮肤伤口修复的屏障的医疗应用。 矿化胶原膜包含基本上均匀的矿化胶原复合材料,其基本上由约30%至约70%重量的胶原组分和约30%至约70%重量的由胶原浆液沉淀的磷酸钙矿物质组分 可溶性含钙离子溶液和可溶性磷酸根离子溶液。 磷酸钙矿物质组分的钙与磷酸盐的摩尔比在约1.0至约2.0的范围内。 薄的矿化胶原膜具有至少约1.0g / cm 3的膜的堆积密度,并且具有不大于约0.5mm,优选不大于约0.3mm的厚度。 制造矿化胶原膜的相应方法包括将薄的平版胶片作为薄的平版胶片浇注到诸如筛子或滤纸的表面上,将薄片空气干燥并将其从表面除去,作为薄的矿化胶原膜。