Electrophoretic Nano-HA Coating for Improved Adhesion

描述(由申请人提供)：这项拟议的第二阶段计划预计将生产使用室温电沉积工艺制造的具有显著延长寿命的羟基磷灰石(HA)涂层骨植入物原型。在第一阶段的工作中，新型HA纳米涂层在体外模拟体液中的结合强度和耐腐蚀性都得到了显著的提高。拟议的第二阶段计划强调开发原型植入设备，以迅速将这一第一阶段纳米技术商业化。卓越的涂层对基材结合强度的优势使HA纳米涂层市场扩展到臀部、膝盖和牙科应用。采用电泳法沉积的HA纳米涂层在HA基材界面实现100%的结晶度和密度，确保在植入服务期间不会发生降解。功能梯度的HA纳米涂层可以在HA组织界面生成，从而促进最佳的生物活性。第二阶段的具体目标包括扩大实验性HA浴液纳米涂层组合物的规模，以中试生产原型医疗植入物；在原型医疗植入物(如髋关节、膝盖和牙科植入物)上展示HA纳米涂层；以及使用动物模型展示涂层原型设备的卓越性能和延长体内使用寿命。第二阶段的参与者包括斯皮尔公司和德克萨斯大学圣安东尼奥分校。

DESCRIPTION (provided by applicant): This proposed phase II program is expected to produce prototype hydroxyapatite ("HA") coated bone implants with significantly extended lifetime, fabricated using a room temperature electrophoretic deposition process. Novel HA nanocoatings with significantly increased adhesion strength and corrosion resistance under simulated body fluid in-vitro have been demonstrated in the Phase I work. The proposed Phase II program emphasizes developing prototype implant devices to rapidly commercialize this Phase I nanotechnology. The benefits of exceptional coating to substrate bond strength enable expansion of the HA nanocoatings market to hips, knees, and dental applications. Achieving 100% crystallinity and density at the HA substrate interface with electrophoretic deposited HA nanocoatings assures no degradation during implant service. Functionally graded HA nanocoatings can be generated at the HA tissue interface, thus promoting optimal bioactivity. The Phase II specific aims include scale up of the experimental HA bath nanocoating composition to pilot-scale production of prototype medical implants; demonstration of the HA nanoparticles coating on prototype medical implants, such as hip, knee, and dental implants; and demonstration of superior performance of the coated prototype devices with extended lifetime in-vivo, using an animal model. Phase II participants include Spire Corporation and the University of Texas at San Antonio.