Kawahara H, Hirabayashi M, Shikita T
J Biomed Mater Res. 1980 Sep;14(5):597-605. doi: 10.1002/jbm.820140506.
When ground to a suitable form, flexural strength of single crystal alumina (Al2O3) decreases to as low as one third the strength of the intact crystal. This flexural strength decrease is, however, recovered by chemical etching at a high temperature to eliminate surface defects caused by grinding. By using this strength recovery treatment, various types of single crystal implants with fine structure were able to be designed. Four kinds of single crystal bone screws and single crystal dental implants of screw and anchor type were designed. Flexural strength and impact strength of the implants were measured.
研磨成合适形状时，单晶氧化铝（Al2O3）的抗弯强度会降至完整晶体强度的三分之一。然而，通过高温化学蚀刻以消除研磨造成的表面缺陷，这种抗弯强度的降低可以得到恢复。通过使用这种强度恢复处理，能够设计出具有精细结构的各种类型的单晶植入物。设计了四种单晶骨螺钉以及螺钉型和锚型的单晶牙种植体。并对植入物的抗弯强度和冲击强度进行了测量。
