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目的：观察新型复合树脂材料Ｄｙｒａｃｔ与牙齿间密合度。方法：应用扫描电镜技术。结果：低倍镜下样品全貌密合度好；放大１０００倍观察４牙合壁、龈壁均无微缝隙。４牙中仅１牙轴壁处有２μｍ左右微缝隙，可能是填压不紧形成的。结论：Ｄｙｒａｃｔ与牙齿间密合度良好。
Objective: To observe the adhesion between the new composite resin Dyract and teeth. Methods: The application of scanning electron microscopy. Results: The images of low magnification showed a good overall adhesion. The magnification of 1000 times magnified the occlusal wall of 4 teeth and no gingival wall. 4 tooth only 1 tooth shaft wall at about 2μm micro-cracks, may be formed by filling pressure is not tight. Conclusion: There is good adhesion between Dyract and the teeth.