aim : to compare the clinical effects of repairing the residual roots and residual crowns of molar teeth with silver amalgam or composite resin 目的:比較銀汞合金與復(fù)合樹脂修復(fù)磨牙殘根、殘冠的療效。
conclusion : the clinical effects of repairing residual roots and residual crowns silver amalgam or composite resin are no differece obviously 結(jié)論:銀汞合金修復(fù)與復(fù)合樹脂修復(fù)殘根、殘冠的療效相差無顯著性。
the size distribution of composite latex particles is similar to that of polyacrylate / caco3 latex . their mean particle diameters gradually decrease with amount of polyacrylate / caco3 latex and caco3 / monomers increasing, but the mean particle diameters of the composite latex are much bigger than particle diameters of caco3 latex . molecular weight of pvc composite resin was determined by viscometer 結(jié)果表明:復(fù)合膠乳呈現(xiàn)與種子粒徑相近的單峰分布,其平均粒徑隨聚丙烯酸酯caco_3種子膠乳中caco_3加入量的增加而逐漸減小,但復(fù)合乳膠粒徑比種子粒徑要大很多;用粘度法測定了復(fù)合樹脂中pvc的粘均分子量。