复合材料最终表面粗糙度的修整系统。

Finishing systems on the final surface roughness of composites.

作者信息

Koh Richard, Neiva Gisele, Dennison Joseph, Yaman Peter

机构信息

Department of Periodontics and Oral Medicine of the School of Dentistry at the University of Michigan in Ann Arbor, MI, USA.

出版信息

J Contemp Dent Pract. 2008 Feb 1;9(2):138-45.

PMID:18264536

Abstract

AIM

This study evaluated differences in surface roughness of a microhybrid (Gradia Direct, GC America) and a nanofil (Filtek Supreme, 3M ESPE) composite using four polishing systems: PoGo/Enhance (DENTSPLY/Caulk), Sof-Lex (3M ESPE), Astropol (Ivoclar Vivadent), and Optidisc (KerrHawe).

METHODS AND MATERIALS

An aluminum mold was used to prepare 2 X 60 composite disks (10 mm X 2 mm). Composite was packed into the mold, placed between two glass slabs, and polymerized for 40 seconds from the top and bottom surfaces. Specimens were finished to a standard rough surface using Moore's disks with six brushing strokes. Specimens were rinsed and stored in artificial saliva in individual plastic bags at 36 degrees C for 24 hours prior to testing. Specimens were randomly assigned to one of the four polishing systems and were polished for 30 seconds (10 seconds per grit) with brushing strokes according to the manufacturer's instructions. Mean surface roughness (Ra) was recorded with a surface-analyzer 24 hours after storage in artificial saliva, both before and after polishing. Means were analyzed using two-way and one-way analysis of variance (ANOVA) and Tukey multiple comparison tests at p < 0.05.

RESULTS

There was a statistically significant difference for baseline measures between Filtek and Gradia (p=0.0338). For Filtek, Sof-Lex provided a significantly smoother surface (Ra=0.80 +/- 0.21) than Optidisc (Ra=0.93 +/- 0.28), Astropol (Ra=1.15 +/- 0.24), and Pogo/Enhance (Ra=1.39 +/- 0.39). For Gradia, Sof-Lex provided a significantly smoother surface (Ra=0.47 +/- 0.09) and Astropol provided a significantly rougher surface (Ra=1.39 +/- 0.19) than Pogo/Enhance (Ra=1.11 +/- 0.20) and Optidisc (Ra=1.15 +/- 0.18). There was no significant difference in roughness between composites for individual polishing systems (p=0.3991).

CONCLUSION

Filtek specimens were smoother than Gradia specimens after baseline roughening. Sof-Lex provided the smoothest final surface when used with either composite. Astropol provided a rough surface for Gradia specimens.

摘要

目的

本研究使用四种抛光系统评估了一种微混合复合树脂（美国GC公司的Gradia Direct）和一种纳米填料复合树脂（3M ESPE公司的Filtek Supreme）表面粗糙度的差异，这四种抛光系统分别是：PoGo/Enhance（登士柏/卡沃）、Sof-Lex（3M ESPE）、Astropol（义获嘉伟瓦登特）和Optidisc（卡瓦盛邦）。

方法和材料

使用铝制模具制备2×60个复合树脂圆盘（10毫米×2毫米）。将复合树脂填入模具，置于两块玻璃板之间，从顶面和底面聚合40秒。使用摩尔圆盘以六个刷涂行程将试样加工至标准粗糙表面。在测试前，将试样冲洗并在36℃下于单独的塑料袋中的人工唾液中储存24小时。将试样随机分配到四种抛光系统之一，并根据制造商的说明以刷涂行程抛光30秒（每个粒度10秒）。在储存在人工唾液中24小时后，使用表面分析仪记录抛光前后的平均表面粗糙度（Ra）。使用双向和单向方差分析（ANOVA）以及Tukey多重比较检验分析均值，p<0.05。

结果

Filtek和Gradia之间的基线测量存在统计学显著差异（p=0.0338）。对于Filtek，Sof-Lex提供的表面（Ra=0.80±0.21）比Optidisc（Ra=0.93±0.28）、Astropol（Ra=1.15±0.24）和PoGo/Enhance（Ra=1.39±0.39）显著更光滑。对于Gradia，Sof-Lex提供的表面（Ra=0.47±0.09）显著更光滑，而Astropol提供的表面（Ra=1.39±0.19）比PoGo/Enhance（Ra=1.11±0.20）和Optidisc（Ra=1.15±0.18）显著更粗糙。对于单个抛光系统，复合树脂之间的粗糙度没有显著差异（p=0.3991）。