Objective To study the mechanical and chemical properties of novel calcium⁃magnesium phosphate cements( CMPCs) . Methods Components of the CMPCs were analyzed by XRD and SEM. The physicochemical properties of the CMPCs were investiga⁃ted, and the effects of different components on setting time, compressive strength, rate of degradation were studied. Results Accord⁃ing to the analysis of XRD and SEM, CMPCs were composed of Ca3( PO4 ) 2 , Mg3( PO4 ) 2 and HA, and a small amount of unreacted MgO was also observed. It showed that with the increasing amount the CMPCs exhibited shorter setting time and higher compressive strength than the CPC. In addition, CMPCs showed significantly improved degradability compared with the CPC in SBF. Conclusion CMPCs possess a significant clinical advantage over CPC, and it might have the value of in⁃depth study as dental restorative material.%目的：研究新型磷酸钙－磷酸镁水门汀（ CMPCs）的理化机械性能。方法采用 X 射线衍射（ XRD）、扫描电镜（ SEM）分析主要物相组成，研究比较材料不同组成对固化时间、抗压强度、降解率的影响。结果 XRD、SEM 分析显示， CMPCs主要包含Ca3（ PO4）2、Mg3（ PO4）2、HA以及少量MgO。随着磷酸镁水门汀含量的增加，CMPCs的固化时间缩短，抗压强度提高，降解率升高。结论 CMPCs理化机械性能优良，作为齿科修复材料具有深入研究的价值。
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