Abstract:

Objective　The new type of zirconia materials and dentin was bonded with different adhesive systems，using different types of LED curing lights. By comparing the shear strength，to provide certain theoretical reference for the choice of clinical indications，adhesives systems and curing lights of the new type of restoration. Methods　According to the unified standard，maxillary incisors in vitro were selected as experimental samples. Prepared and scanned post space，new type of zirconia post was made by CAD/CAM. Randomly divided into 6 groups，post was respectively bonded using 3 kinds of adhesive systems （Panavia F，Multilink N，NX3-Nexus） and 2 kinds of LED lights （ordinary ，VALO）. Then the samples were horizontally cut into a 1 mm slice. The slices were released in the universal mechanical test machine，the shear strength of each group was analyzed by SPSS 17.0. Results　　The shear strength of Panavia F was better than that of Multilink N and NX3-Nexus，using the ordinary LED curing light （P < 0.05）. Panavia F also had higher shear strength than the other two adhesive systems, using VALO LED curing light （P < 0.05）. There was no significant difference in shear strength between the ordinary and VALO light，using the same adhesive systems （P > 0.05）. Conclusion　　The adhesion strength of Panavia F is better than those of Multilink N and NX3-Nexus，using different types of LED curing lights. There is no significant difference in adhesion strength between VALO and ordinary LED curing light，the VALO LED curing light can significantly reduced the operating time by the side of the chair.

Key words: zirconia, adhesive system, curing light, shear strength

摘要：

目的　应用不同粘接系统及不同类型LED光固化灯对新型氧化锆材料与牙本质进行粘接后，比较其剪切强度的大小，为新材料修复体的临床适应证及粘接系统、固化灯的选择提供依据。方法　按统一标准选择60颗离体上颌切牙制作研究模型，预备桩道，CAD/CAM扫描制作“玉瓷”氧化锆桩核，随机分成6组，分别采用3种粘接系统（Panavia F、Multilink N、NX3-Nexus）及2种型号的LED灯（普通型、VALO型）进行粘接和固化，然后将模型水平切割成1.0 mm的薄片，进行薄片推出实验。采用SPSS17.0统计软件分析比较各组剪切强度大小。结果　使用普通型LED灯固化的Panavia F的剪切强度优于Multilink N和NX3-Nexus（P＜0.05）；使用VALO型LED灯固化的Panavia F也比其他两种粘接系统的剪切强度高（P＜0.05）。同种粘接系统使用普通型和VALO型LED灯固化的剪切强度差异均无统计学意义（P＞0.05）。结论　不同型号的LED灯固化后，Panavia F的粘接强度均优于Multilink N和NX3-Nexus；使用VALO型LED灯固化后的粘接强度与普通型LED灯的无显著差异，但可大幅度减少椅旁操作时间。

关键词: 氧化锆, 粘接系统, 光固化灯, 剪切强度