Sagara M, Ohno H
Department of Dental Materials Science, Health Sciences University of Hokkaido School of Dentistry, Japan.
Dent Mater J. 1999 Dec;18(4):366-84. doi: 10.4012/dmj.18.366.
To achieve durable bonding with adhesive resin, the surface roughness and the kinds of oxides, respectively to increase mechanical retention to enhance the chemical affinity of adhesive monomer with the gold alloy, were regulated by high-temperature oxidation together with the addition of small amounts of base metals. Alloys containing 2 mass% of Ni, In, or Cr with Cu were oxidized at 800 degrees C for 20 min in air, pickled in thioglycolic acid, and subsequently oxidized at 500 degrees C for 10 min in air. The morphology of the internal oxidation zone changed markedly according to the added base metals. Although the internal oxide particle composed of only Cu2O was removed by pickling, NiO, In2O3, and chromium oxides could not removed and remained on the alloy surface. The surface roughness was increased by addition of Ni, In, or Cr. Applying the present method can control the roughness and chemical states on a gold alloy surface to increase its adhesive ability with adhesive resins.
为了实现与粘结性树脂的持久粘结，通过高温氧化并添加少量贱金属，分别调节表面粗糙度和氧化物种类，以增加机械固位力并增强粘结性单体与金合金之间的化学亲和力。含2质量%镍、铟或铬与铜的合金在空气中于800℃氧化20分钟，用巯基乙酸酸洗，随后在空气中于500℃氧化10分钟。内氧化区的形态根据添加的贱金属而显著变化。尽管仅由Cu2O组成的内氧化物颗粒通过酸洗被去除，但NiO、In2O3和铬氧化物无法被去除并保留在合金表面。添加镍、铟或铬可增加表面粗糙度。应用本方法可控制金合金表面的粗糙度和化学状态，以提高其与粘结性树脂的粘结能力。
