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    • 9. 发明授权
    • Prosthetic teeth and mold making therefor
    • 假牙和模具制作
    • US5908299A
    • 1999-06-01
    • US988072
    • 1997-12-10
    • Barry DehoffJeffrey McGrawJames McNultyVickie ReynoldsRoger ShueMark White
    • Barry DehoffJeffrey McGrawJames McNultyVickie ReynoldsRoger ShueMark White
    • A61C13/00A61C13/08
    • A61C13/0004A61C13/081
    • A prosthetic tooth having an enamel layer which has a zone of substantially constant thickness. This tooth is molded using a dental tooth mold part prepared by imaging a dental pattern of a prosthetic tooth shade layer and/or shader mold part outer surface, and forming the dental pattern in a mold by program directed milling. A family of prosthetic teeth is provided including a first tooth in a first set of teeth having a first overall labial length, and a first back length, and a second tooth in a second set of teeth having a second overall labial length, and a second back length. The invention provides a prosthetic incisor tooth including a tooth body having two generally symmetrical curved grooves between three curved ridges on the labial face of the body at the incisal end of the body. The grooves are deepest at the incisal end and extend substantially from the incisal edge to at least about 15 percent of the overall tooth length.
    • 具有具有基本上恒定厚度的区域的搪瓷层的假牙。 使用通过对假牙齿遮蔽层和/或着色器模具部件外表面的牙齿图案进行成像制备的牙齿模具部件来模制该牙齿,并且通过程序定向铣削将模型形成在模具中。 提供了一系列假牙,其包括具有第一整体唇长的第一组齿中的第一齿和第一后长度,以及具有第二整体唇长的第二组齿中的第二齿,以及第二齿 后中长。 本发明提供了一种假肢切牙,其包括在身体的切口端处的身体的唇面上的三个弯曲脊之间具有两个大致对称的弯曲凹槽的齿体。 凹槽在切割端处最深,并且从切割边缘基本上延伸到整个牙齿长度的至少约15%。
    • 10. 发明授权
    • Polyvinylsiloxane impression material
    • 聚乙烯基硅氧烷印模材料
    • US5661222A
    • 1997-08-26
    • US490690
    • 1995-04-13
    • Robert V. Hare
    • Robert V. Hare
    • A61K6/10C08L83/04
    • A61K6/10C08L83/04C08G77/12C08G77/20C08G77/70C08G77/80
    • Improved two component polymerizable polyorganosiloxane compositions are described, particularly for use in making dental impressions, having improved tear strength and wettability. Improved tear strength results from inclusion of a quadri-functional polysiloxane having a vinyl content of 0.16 to 0.24 m-mole/g. Working time is maintained by including sufficient amounts of a retarder composition that delays onset of the vinyl polymerization. Wettability is improved by including a surfactant resulting in a surface contact angle with water at three minutes of less than 50.degree.. The surfactant chosen has an HLB of 8-11, such that the wetting contact angle is achieved within less than two minutes and remains wetting throughout the working time of the impression taking, substantially improving the impression making process.
    • 描述了改进的双组分可聚合聚有机硅氧烷组合物,特别是用于制造牙印痕,具有改善的撕裂强度和润湿性。 通过包含乙烯基含量为0.16〜0.24m摩尔/ g的四官能聚硅氧烷,提高撕裂强度。 通过包括足够量的缓凝剂组合物延长乙烯基聚合的开始来维持工作时间。 通过在三分钟以下的表面活性剂中含有与水的表面接触角小于50℃,提高润湿性。 选择的表面活性剂具有8-11的HLB,使得在不到两分钟内实现润湿接触角,并且在印模的整个工作时间内保持湿润,从而大大改善印模制作过程。