12种非金属核材料的弯曲性能研究

目的：研究临床常用的12种非金属制核材料的弯曲性能,为临床选择制核材料提供依据。方法：根据制核材料的种类分12组,依据ISO4049-2000标准,按照各种制核材料产品使用说明分别制作规格为：25mm×2mm×2mm的标准试件,在万能力学试验机上测试弯曲性能。结果：不同种类制核材料的弯曲性能有显著性差异（P〈0.05）,其中树脂类制核材料的弯曲性能优于玻璃离子类材料。结论：不同种类制核材料的弯曲性能不同,临床使用时应根据具体情况选用合适的材料。

Study on the flexural strength of 12 different non-metal core materials.

Objective： To study the flexural strength of twelve kinds of non-metal core materials and provide a clinical core materials choose basis. Method： The experiment groups were divided into twelve groups by the kind of core materials. Referring to the ISO 4049-2000 standard, the flexural strength samples were fabricated respectively according to the user guide of each type core material, the size of sample was 25 mm × 2 mm ×2 ram. Then the flexural strength of the samples was tested on the universal electronical testing machine. Result： It was significant that the flexural strength difference be- tween the type of core materials（P 〈0.05）, and the flexural strength of resin core materials was higher than that of GIC（glass ionomer cement）.Conclusion： The flexural strength of core materials was different from the type of it, it need consider the strength of the core material when choose it in clinic.