Application of functionally graded biomaterials consisting of ceramic and metal to prosthedontic dentistry

我们在空气中高温氧化和随后的酸溶液酸洗后，在金合金表面上创建了多孔结构。采用酸溶液酸洗去除14 K金合金表面800℃高温氧化后析出的Cu氧化物内氧化颗粒，使合金表面形成海绵状结构。结果表明，这种多孔结构显著增强了树脂与金合金的机械结合。我们还开发了一种在多孔合金表面均匀涂覆杂化陶瓷或羟基磷灰石的新方法。探讨了该涂层技术制备金属-陶瓷梯度功能生物材料的可行性。结果表明：1）多孔金合金表面与混合陶瓷之间具有足够的结合强度; 2）湿法制备的多孔金合金表面可形成均匀的羟基磷灰石膜; 3）具有多孔表面结构的金合金可用于制备混合陶瓷涂层金属冠桥; 4）混合陶瓷表面金属修复体具有良好的美学质量，可用于临床。

We created the porous structure on the gold alloy surface after high-temperature oxidation in air and subsequent pickling with an acid solution. The internal oxidation particles of Cu oxides precipitated in a 14K gold alloy surface after high-temperature oxidation at 800℃ in air were removed by pickling with an acid solution to create a sponge-like structure on the alloy surface. It was demonstrated that this porous structure significantly enhanced mechanical bonding of resin to the gold alloy. We also developed the novel method for coating the porous alloy surface uniformly with hybrid ceramics or hydroxyapatite. The feasibility of this coating technique for making functionally graded biomaterials consisting of metal and ceramics to clinical application was addressed. The following results were obtained:1) Sufficient bonding strength was obtained between the porous alloy surface and the hybrid ceramics.2) Uniform hydroxyapatite film was formed on the porous gold ally surface in wet process.3) Hybrid ceramics-coated metal crowns and bridges can be made using the gold alloy with porous surface structure.4) We confirmed the hybrid ceramics facing metal prostheses with excellent esthetic quality can be used clinically.