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首页> 外文期刊>Brazilian Journal of Oral Sciences >Surface topography and bacterial adhesion of CAD/ CAM resin based materials after application of different surface finishing techniques
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Surface topography and bacterial adhesion of CAD/ CAM resin based materials after application of different surface finishing techniques

机译：应用不同的表面处理技术后，基于CAD / CAM树脂的材料的表面形貌和细菌粘附力

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Aim: This study evaluated the surface topography and bacterial adhesion of a hybrid ceramic and a nano ceramic resin composite after different surface finishes. Methods: Hybrid ceramic (Vita Enamic, VITA - EN) and nano ceramic resin composite (Lava Ultimate, 3M/ESPE - LV) blocks of 12 x 14 x 18 mm were cut into 1mm slices. Each slice was divided into four specimens (6 x 7 mm) that were randomly allocated into 4 groups (n=8) according to the surface finishing: CTL - without surface finish (control); DB - wear with a diamond bur; VT - polishing system for hybrid ceramic (VITA); and DD - polishing system for ceramics (Dedeco). The specimens were analyzed regarding surface roughness parameters (Ra, Rz, Rq), sterilized and subjected to bacterial adhesion. Representative specimens from each group were observed by SEM and Confocal Laser Scanning Microscopy. Data were submitted to two-way ANOVA and Tukey’s test (α=0.05). Results: EN had lower surface roughness and bacterial adhesion than LV (p0.05), regardless of the surface finish. The highest values for all roughness parameters was observed in LVDB group, differing from the other groups,which were not significantly different. Smaller bacterial adhesion values (CFU/mL) were observed for ENDD and ENVT, which differed significantly from the other groups, except ENCTL. For LV groups there was no significant difference between the different surface finishes (p0.05). The type of material and surface finishsystem significantly interfered with surface roughness parameters and bacterial adhesion. The hybrid ceramic performed better after polishing than the nano-ceramic resin. Conclusion: An adequate finishing/polishing technique should always be performed after any kind of adjustment to indirect restorations made with these materials tested.
机译：目的：本研究评估了混合陶瓷和纳米陶瓷树脂复合材料在不同表面处理后的表面形貌和细菌粘附力。方法：将12 x 14 x 18毫米的混合陶瓷（Vita Enamic，VITA-EN）和纳米陶瓷树脂复合材料（Lava Ultimate，3M / ESPE-LV）块切成1毫米的切片。将每个切片分成四个样本（6 x 7毫米），根据表面光洁度随机分为4组（n = 8）：CTL-无表面光洁度（对照）; DB-配钻石钻针; VT-混合陶瓷抛光系统（VITA）;和DD-陶瓷抛光系统（Dedeco）。分析样品的表面粗糙度参数（Ra，Rz，Rq），进行灭菌处理并进行细菌粘附。通过SEM和共聚焦激光扫描显微镜观察每组的代表性标本。数据已提交至双向ANOVA和Tukey检验（α= 0.05）。结果：与表面光洁度无关，EN的表面粗糙度和细菌粘附性均低于LV（p <0.05）。 LVDB组中所有粗糙度参数的最大值均与其他组不同，但差异不显着。 ENDD和ENVT观察到较小的细菌黏附值（CFU / mL），与ENCTL以外的其他组明显不同。对于LV组，不同表面光洁度之间无显着差异（p> 0.05）。材料的类型和表面光洁度系统会严重干扰表面粗糙度参数和细菌粘附。抛光后，杂化陶瓷的性能优于纳米陶瓷树脂。结论：在对使用这些材料进行的间接修复进行任何形式的调整之后，应始终执行适当的修整/抛光技术。

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