Electrophoretic Nano-HA Coating for Improved Adhesion

描述（由申请人提供）：该拟定的II期项目预计将生产使用室温电泳沉积工艺制造的具有显著延长寿命的原型羟基磷灰石（“HA”）涂层骨植入物。新型HA纳米涂层在体外模拟体液下具有显着增加的粘附强度和耐腐蚀性已在第一阶段工作中得到证实。拟议的第二阶段计划强调开发原型植入设备，以迅速商业化这一阶段的纳米技术。优异的涂层与基材结合强度的优势使HA纳米涂层市场能够扩展到髋关节、膝关节和牙科应用。在电泳沉积HA纳米涂层的HA基底界面处实现100%结晶度和密度，确保在植入服务期间没有降解。功能梯度HA纳米涂层可以在HA组织界面处生成，从而促进最佳生物活性。第II阶段的具体目标包括将实验性HA浴纳米涂层组合物按比例放大到原型医疗植入物的中试规模生产;在原型医疗植入物（例如髋关节、膝关节和牙科植入物）上展示HA纳米颗粒涂层;以及使用动物模型展示具有延长的体内寿命的经涂覆原型装置的上级性能。第二阶段的参与者包括Spire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.