Purpose: to probe one suitable way to treat middle-age and old-age patients who suffer dental disease.
目的：探索一种适合中老年牙病病人的治疗办法。
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Results: SEM showed that nano TiO2 and nano ZrO2 were distributed into dental composite resin evenly and X ray electron probe showed the components of nano materials were 8.59% and 7.55% respectively.