2种垫底材料对后牙深龋充填的敏感性比较

目的 比较3M光固化玻璃离子和DMG爱诺赛光固化复合体两种垫底材料对后牙深龋充填的术后敏感性。 方法 84例84颗深龋后牙，随机分为3M组和DMG组，3M组垫底材料为3M VitrebondTM光固化玻璃离子，DMG组垫底材料为DMG Ionosit-Baseliner爱诺赛光固化复合体，自酸蚀后，两组上层均加压填充3M FiltekTM Z350纳米复合树脂，于修复后1天、1周、1个月和3个月，对敏感发生率和自觉疼痛程度进行比较。 结果 术后1天、1周和1个月，3M组和DMG组的术后敏感率和自觉疼痛程度无差异（P>0.05），术后3个月，3M组的术后敏感率和疼痛程度低于DMG组，差异有统计学意义（P<0.05）。结论 在后牙深龋治疗中，使用光固化玻璃离子垫底材料可降低术后敏感的发生。

Comparison of postoperative sensitivity of two liner materials in posterior restorations

Objective To compare the postoperative sensitivity of deep caries treated with 3M light cured glass ionomer and DMG Ionosit-Baseliner. Methods A total of 84 posterior teeth with deep caries from 84 patients were randomly divided into two groups: 3M group and DMG group. 3M VitrebondTM light cured glass ionomer was used as liner material in Group 3M and Ionosit-Baseliner was used in Group DMG. After etching, both groups were filled with 3M FiltekTM Z350 nano composite resin. The sensitivity and the pain degree were evaluated and compared 1 day, 1 week, 1 month and 3 months after operation. Results There was no significant difference in the postoperative sensitivity and self-pain level between the two groups after 1 day, 1 week and 1 month （P>0.05）. Compared with group DMG, the incidence of sensitivity and self-pain level were lower in group 3M 3 months after operation（P<0.05）.Conclusions In posterior restorations, the light cured glass ionomer can reduce the incidence of postoperative sensitivity.