Dyract复合充填材料与夹层技术修复楔形缺损的临床对照研究

目的：探讨Ｄｙｒａｃｔ复合充填材料在牙体修复方面替代夹层技术的可行性。方法：在同一个体上选择条件基本相同的楔形缺损患牙共３２０颗，分别采用Ｄｙｒａｃｔ复合充填材料和夹层技术充填修复，随访观察１８－２４月，并对其疗效进行比较。结果：Ｄｙｒａｃｔ组、夹层技术组分别有３、５颗修复物脱落，两组其余牙外形均完整、无缺损、表面光滑、色泽光亮 ； Ｄｙｒａｃｔ组修复物的脱落率为 １．８７％，边缘密合度失败率为１．８７％，均低于夹层技术组（ Ｐ＞ ０．０５）；两组均无牙髓病变及继发龋发生； Ｄｙｒａｃｔ总失败率为 １．８７％，低于夹层技术组（ Ｐ＞ ０．０５）２结论： Ｄｙｒａｃｔ复合充填材料具有玻璃离子复合树脂夹层技术的功效，在牙体修复方面可替代夹层技术

Clinical control study of restoring wedge - shaped defect with dyract complex material and sandwich technique

Objective: To study whether Dyract complex material in operative dentistry can instead of Sandwich technique or not. Methods:Application of Dyract complex material and Sandwich technique to restore 320 wedge - shaped defect of the teeth in the same body and the same conditions in the article. They had been followed up for 18-24 momths, and their efficiencies were compared. Results: 1, There were three fell restorations in Dyract group and its falling rate was 1.87 %, and its successful rate of the adaption was 98.13 % , both of them were no significance difference compared with Sandwith technique group(P>0. 05 ). 2. There were no pulp symptom and second cavity in the two groups. 3. The total successful rate of Dyract group was 98.13 %, and there was no significance difference compared with Sandwich technique group(P>0.05 ). Conclusion: Dyract has the same effect and efficiency as Sandwich technique, and it is consider to instead of Sandwich technique in operative dentistry.