ABRASIVE USED IN DENTAL TECHNIQUE AND ITS USE

摘要

PROBLEM TO BE SOLVED: To prevent the formation of bubbles and succeeding corrective baking after a sample is fitted by substituting a standard abrasive with an abrasive made of a dental ceramic of silicate as a base. ;SOLUTION: An abrasive for dental technique is made of a dental ceramic of fine-grain silicate. The grain size of the abrasive is set to 50-200 μm, advantageously to 100-150 μm. The abrasive contains 240-90 wt.% SiO2, 2-25 wt.% Me(III)2O3, 0-30 wt.% Me(I)2O, 0-20 wt.% Me(II)O, 0-30 wt.% Me(IV)O2, 0-8 wt.% B2O3, 0-15 wt.% P2O5, and 0-3 wt.% F, where Me(III)2O3 indicates Al2O3, La2O3 and Sb2O3; Me(I)2O indicates K2O, Na2O and Li2O; Me(II)O indicates CaO, BaO, MgO, ZnO and SrO; and Me(IV)O2 indicates TiO2, ZrO2, CeO2 and SnO2.;COPYRIGHT: (C)2000,JPO