Abstract:

Objective To compare the polishing effects of three different polishing systems on machinable composite resins and to provide a basis for the rational selection of polishing systems in the clinic. Methods Block HC, Cerasmart, and Hyramic were fabricated into 90 test pieces. Then, 30 test pieces for each material were randomly divided into 3 groups with 10 pieces per group. The pieces were polished with the Vita Enamic ^? Polishing Set (Vita group), EVE RA341 composite polishing set (Eve group), and Toboo M elastic ceramic polishing set (Tob group). The surface roughness and gloss of each test piece after polishing were measured, and the surface morphology was observed using a scanning electron microscope. Results The surface roughness values of the Vita and Eve groups for the same composite material were significantly lower than those in the Tob group (P < 0.05). No significant difference was found between the Vita and Eve groups (P > 0.05). Lower roughness values could be achieved. The gloss values of the three composite resins in the same material group were in the order of Vita group > Eve group > Tob group, and the differences between the groups were statistically significant (P < 0.05). No significant differences in the surface roughness and gloss values were found among the different composite resins (P > 0.05). Scanning electron microscopy showed that the Vita group had fewer and lighter scratches on the surface and a more uniform texture. Conclusion The Vita Enamic ^?Polishing Set can be used to cut composite resin and yields the lowest roughness and highest gloss values with the best polishing effect. The same polishing system did not exhibit significant differences in the polishing effect for different machinable composite resins.

Key words: machinable composite resin, polishing, surface roughness, gloss, scanning electron microscopy

摘要：

目的 比较不同抛光系统对可切削复合树脂的抛光效果,为临床合理选择抛光系统提供依据。方法 将Block HC、Cerasmart、润瓷3种可切削复合树脂共制作成90个试件,每种材料制作30个试件,每种材料的30个试件随机分为3组,每组10个,分别用Vita Enamic ^? Polishing Set（Vita组）、EVERA341复合材料抛光套装（Eve组）、道邦弹性陶瓷抛光套装（Tob组）进行打磨抛光,共9组。测量每组试件抛光后的表面粗糙度和光泽度,扫描电子显微镜观察表面形貌。结果 3种复合树脂同种材料组内Vita组和Eve组表面粗糙度值均低于Tob组,差异具有统计学意义（P<0.05）,Vita组和Eve组间差异无统计学意义（P>0.05）,均能达到较低的粗糙度值;3种复合树脂同种材料组内光泽度值从大到小依次为Vita组、Eve组、Tob组,各组间差异具有统计学意义（P<0.05）。不同复合树脂间表面粗糙度值和光泽度值间差异无统计学意义（P>0.05）。扫描电子显微镜结果显示Vita组表面划痕少且细浅,质地较均匀。结论 Vita Enamic ^? Polishing Set抛光后可切削复合树脂能达到较低粗糙度值和最高光泽度值,抛光效果最好;相同的抛光系统对不同可切削复合树脂抛光效果差异无统计学意义。

关键词: 可切削复合树脂, 抛光, 表面粗糙度, 光泽度, 扫描电子显微镜