Conclusion: The pit and fissure sealant have significant preventive effect on carious teeth.结论: 窝沟封闭能有效预防窝沟龋的发生.Objective To improve the diagnosis of acute pulpitis on molars without carious lesions.目的为了进一步提高非龋性磨牙急性牙髓炎的诊...
Using calcium chloridize and sodium phosphate dibasic, this paper synthesizes hydroxyapatite having hexagonal system at 40 ℃.本文以氯化钙和磷酸氢二钠为原料,在40℃温度下合成了具有六方晶系的羟基磷灰石.Under proper condition the dibasic alcohol and bisphenol...