Comparison of stability of three types of cements

    WU Wei, CHEN Jiª²Hua, ZHAO Sanª²Jun, HE Shuai

    Department of Prosthodontics, College of Stomatology, Fourth Military Medical University, Xi¬ðan 710033, China

    ¡¾Abstract¡¿ AIM: To compare the stability of 3 types of cements in a simulated oral environment so as to provide theoretical evidences for their clinical application. METHODS: Three types of cements (3M ESPE RelyXTM Luting Cement, DENSPLY DETREY ChemFlexTM Glassª²ionomer cement, Shofu POLYCARBOXYLATE Cement) were dipped in artificial saliva for 30 d and were thermal cycled for 2000 times at the same time. Then the solubility of the 3 types of cements were caculated and the surface of samples were observed under scanning electron microscope (SEM). RESULTS: Significant differences in stability were found among the 3 groups (P<0.05). The descending sequence of stability was Shofu POLYCARBOXYLATE Cement, DENSPLY DETREY ChemFlexTM Glassª²ionomer cement, 3M ESPE RelyXTM Luting Cement. CONCLUSION: The stability of resinª²modified glass ionomer cement is an excellent choice for filling and adhesive because of its high stability and low solubility. ......