Bioerodible poly(ortho esters) useful as orthopedic implants or vehicles for the sustained delivery of pharmaceutical, cosmetic and agricultural agents from dioxane-based di(ketene acetals). Block copolymers contain these bioerodible poly(ortho esters). These block copolymers have both hydrophilic and hydrophobic blocks. They form micelles in aqueous solution, making them suitable for encapsulation or solubilization of hydrophobic or water-insoluble materials; and they also form bioerodible matrices for the sustained release of active agents.
生物可降解的聚
酯类(ortho esters)可用作骨科植入物或从
二噁烷基二(
酮酸酯)中提供药物、化妆品和农业剂量的持续释放载体。这些
生物可降解的聚
酯类是由含有这些聚
酯类的嵌段共聚物组成的。这些嵌段共聚物具有亲
水和疏
水的嵌段。它们在
水溶液中形成胶束,适用于封装或溶解疏
水或不溶于
水的材料;它们还形成
生物可降解的基质,用于持续释放活性成分。