Journal of Prevention and Treatment for Stomatological Diseases ›› 2019, Vol. 27 ›› Issue (7): 441-445.doi: 10.12016/j.issn.2096-1456.2019.07.006

• Basic Study • Previous Articles     Next Articles

Comparison of polishing effects of three polishing systems on machinable composite resins

Yanan LIU,Likai WANG,Sisi LIU,Hui HUI,Haifeng WANG()   

  1. School of Rehabilitation Medicine of Capital Medical University, China Rehabilitation Research Center, Department of Stomatology, Beijing Bo’ai Hospital, Beijing 100068, China
  • Received:2019-01-04 Revised:2019-03-23 Online:2019-07-20 Published:2019-07-24
  • Contact: Haifeng WANG E-mail:wanghaifeng98@163.com

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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

CLC Number: 

  • R783.4

Table 1

Information for the three machinable composite resins"

材料名称 基质 填料主要成分 填料质量分数（%） 颜色/尺寸 生产商 产地
Block HC UDMA, TEGDMA 二氧化硅、硅酸锆 61 A2-LT/M Shofu 日本
Cerasmart Bis-MEPP, UDMA, DMA 二氧化硅、钡玻璃粉 71 A2-LT/14 GC 日本
润瓷 UDMA, TEGDMA 二氧化硅粉体、钡玻璃粉 82 A2-LT/14 爱尔创 中国

Table 2

Information for the three polishing systems"

组别 产品名称 制造商 成分 用法
Vita Vita Enamic? Polishing Set Vita,德国 聚氨酯、碳化硅、金刚石颗粒 ①抛光（粉色） ≤ 10 000 r/min,30 s
②高光泽抛光（灰色） ≤ 8 000 r/min,30 s
Eve RA341复合材料抛光套装 EVE,德国 橡胶、金刚石颗粒 ①修整（灰白色） ≤ 8 000 r/min,30 s
②抛光（深粉色） ≤ 8 000 r/min,30 s
Tob 弹性陶瓷抛光套装 道邦,中国 硅胶、橡胶、金刚石颗粒 ①修整（灰白色） ≤ 20 000 r/min,20 s
②抛光（深粉色） ≤ 10 000 r/min,20 s
③高光泽抛光（灰色） ≤ 10 000 r/min,20 s

Table 3

Surface roughness (Ra) of the three machinable composites after using the three polishing systems $\bar{x}$± s,μm"

材料 Vita Eve Tob 平均值 F值 P值
Block HC 0.098 ± 0.008 0.104 ± 0.010 0.261 ± 0.032 0.154 ± 0.079 218.534 <0.001
Cerasmart 0.101 ± 0.021 0.122 ± 0.016 0.249 ± 0.038 0.157 ± 0.071 90.090 <0.001
润瓷 0.105 ± 0.012 0.114 ± 0.019 0.233 ± 0.022 0.151 ± 0.062 156.500 <0.001
平均值 0.102 ± 0.015 0.113 ± 0.016 0.248 ± 0.032 0.154 ± 0.070 415.2041) <0.0011)
F值 0.554 3.228 2.034 0.6791) 2.6662）
P值 0.581 0.055 0.150 0.5101) 0.0382）

Table 4

Gloss values of the three machinable composites after using the three polishing systems for each group of specimens $\bar{x}$ ± s,GU"

材料 Vita Eve Tob 平均值 F值 P值
Block HC 76.79 ± 3.30 70.49 ± 3.68 42.65 ± 5.82 63.31 ± 15.68 169.629 <0.001
Cerasmart 74.10 ± 4.35 66.55 ± 5.68 44.05 ± 3.53 61.57 ± 13.72 115.129 <0.001
润瓷 72.38 ± 4.17 67.38 ± 3.39 44.69 ± 3.91 61.48 ± 12.80 147.861 <0.001
平均值 74.42 ± 4.25 68.14 ± 4.56 43.80 ± 4.46 62.12 ± 13.98 425.0261） <0.0011）
F值 3.140 2.258 0.529 1.7281） 1.9362）
P值 0.059 0.124 0.595 0.1841） 0.1122）

Figure 1

Surface morphologies of the three machinable composites after using the three polishing systems SEM × 5 000"

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