Objective

To assess the change in surface roughness of nanohybrid resin composite (Tetric EvoCeram) after antagonist wear against monolithic zirconia and lithium disilicate ceramics through a simulated chewing test using a three-dimensional (3D) profilometer.

Methods

A total of 40 Tetric EvoCeram™ resin composite specimens against either a Lava™ Plus zirconia antagonist (n = 20) or IPS e.max Press lithium disilicate antagonist (n = 20) were prepared for the study. The surface roughness profiles of each resin composite before and after an in-vitro simulated chewing test were analysed using a 3D profilometer and Talymap software. After the simulated chewing, the surface profiles of representative Tetric EvoCeram specimens from each group were analysed using scanning electron microscopy. Independent t-test and paired t-test were used for statistical analysis.

Results

For both lithium disilicate and zirconia groups, all surface roughness parameters (Ra, Rt, Sa, Sq,) of Tetric EvoCeram were significantly higher post-chewing compared to pre-chewing (p < 0.05); the post-chewing surface roughness parameters of Tetric EvoCeram for the lithium disilicate group were significantly higher (p < 0.05) than in the zirconia group.

Significance

This chewing simulation test showed that Tetric EvoCeram composites exhibited a rougher surface when opposing lithium disilicate ceramic compared to opposing zirconia ceramic.

中文翻译：

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氧化锆陶瓷和二硅酸锂陶瓷对咀嚼模拟对树脂复合材料表面粗糙度的影响

客观的

通过使用三维（3D）轮廓仪进行的模拟咀嚼测试，评估拮抗剂对单片氧化锆和二硅酸锂陶瓷的磨损后，纳米混合树脂复合材料（Tetric EvoCeram）的表面粗糙度的变化。

方法

总共准备了40个针对Lava™Plus氧化锆拮抗剂（n = 20）或IPS e.max Press二硅酸锂拮抗剂（n = 20）的Tetric EvoCeram™树脂复合材料样品。使用3D轮廓仪和Talymap软件分析了体外模拟咀嚼测试前后每种树脂复合材料的表面粗糙度轮廓。模拟咀嚼后，使用扫描电子显微镜分析每组代表性Tetric EvoCeram标本的表面轮廓。使用独立t检验和配对t检验进行统计分析。

结果

对于二硅酸锂和氧化锆基团，Tetric EvoCeram的所有表面粗糙度参数（Ra，Rt，Sa，Sq，）在咀嚼后均比咀嚼前高（p <0.05）；二硅酸锂组的Tetric EvoCeram的咀嚼后表面粗糙度参数明显高于氧化锆组（p <0.05）。

意义

该咀嚼模拟测试表明，与对置的氧化锆陶瓷相比，当对置的二硅酸锂陶瓷时，Tetric EvoCeram复合材料的表面更粗糙。