In the roasting temperature casting shrinkage crystal transition volume change larger material can compensate the pure titanium, but easy to molten titanium reacts, the fouling layer formation of thick, affect the physical and mechanical properties of titanium prosthesis.
At present can not only solve the titanium restoration precision, but also can reduce the pollution of Titanium casting has not been reported buried materials package, so about titanium casting investment research and development work is still a hot spot.
In addition, the current commercial better performance of several ti investments are expensive, the manufacturers instructions also require the use of casting system of the factory matching (Titanium alloy valve, titanium), this has to some extent increased titanium restoration cost, finally make titanium restorations be roughly the same price with the use of expensive metal material prices.
This hinders widely used in clinical application of pure titanium prosthesis.
没有评论:
发表评论