抄録
We discussed the relation between the behavior of the reaction layer and the concentration of the colloidal silica solution as the mixing liquid, on the surface layer of the pure titanium crowns that was produced by using the phosphate-bonded thermal expansion inhibited, investment, and compared it with the phosphate-bonded investments on the market as well.
The results were as follows:
1.There was a hardened layer in the surface layer of cast crowns, and the hardness showed the greatest value in the condition of 40% colloidal silica concentration.
2.In the surface layers of metallic textures, there were chill layer and columnar structure layer in that order from surface.
3.There was a poor Tilayer on the surface. The thickness of the layer increased accordingly to the increase in colloidal silica concentration.
4.In the poor Ti layer, there were O, Si and P.
5.Si and P were observed correspondingly in the cellular boundary in a string form.
6.Not only the refractory material but also the concentration of colloidal silica solution as the mixing liquid influenced the behavior of the reaction layer.
