目的通过改进纯钛铸造方法提高钛铸件的精确性。
Objective To investigate the method of enhancing the accuracy of titanium crowns by improving the casting method.
目的探讨不同抛光方法对纯钛铸件表面的抛光效果。
Objective To evaluate the effects of different polishing methods on surface roughness of pure titanium castings.
结论：纯钛铸件的化学抛光法具有临床应用和推广价值。
Conclusion: The chemical polishing of titanium has a clinical applying value, and is worth of spread.
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