Al Khuraif Abdul Aziz A
Dental Health Department, College of Applied Medical Sciences, King Saud University , Riyadh , Saudi Arabia.
Acta Odontol Scand. 2014 Nov;72(8):977-83. doi: 10.3109/00016357.2014.933251. Epub 2014 Sep 15.
To evaluate the influence of tooth brushing on wear and surface roughness of four different particulate filler composite resins.
Six specimens (2 mm thick and 8 mm in diameter) of each tested material (Filtek Z250-Microhybrid, SpectrumTPH3-Submicron hybrid, Filtek Z350XT Nanofiller and Filtek P90- Microhybrid) were prepared according to the manufacturer's directions. A brushing sequence of 5000, 10,000 and 20,000 cycles was performed for all the samples. A non-contact profilometer was used to determine average surface roughness (Ra) and wear of the material assessed using an analytic electronic balance at baseline and each cycle interval. The data obtained were analyzed using one-way ANOVAs and post-hoc multiple comparison tests. Paired t-test was used for comparisons between cycle intervals for each material. Analyses with scanning electron microscopy (SEM) were also performed.
The resin composite Filtek P 90 presented an increase in percentage weight loss after final toothbrushing cycles over the rest of the materials. Brushing significantly increased roughness (Ra) for all composites. Filtek Z250, after brushing, was significantly rougher than the other resins followed by Filtek P 90, Spectrum TPH 3 and Filtek Z350 XT. However, SEM images indicated severe change in surface topography of 'sub-micron hybrid' specimen compared to each other after tooth brushing.
Wear and surface roughness increased with each cycle interval for all the materials and one composite resin demonstrated a higher increase in surface roughness than the other three tested brands of composite resins. Not much difference was observed in the weight loss between tested samples.
评估刷牙对四种不同颗粒填料复合树脂磨损及表面粗糙度的影响。
按照制造商的说明制备每种测试材料（Filtek Z250 - 微混合树脂、Spectrum TPH3 - 亚微米混合树脂、Filtek Z350XT纳米填料树脂和Filtek P90 - 微混合树脂）的六个样本（厚2毫米，直径8毫米）。对所有样本进行5000次、10000次和20000次循环的刷牙程序。使用非接触式轮廓仪测定平均表面粗糙度（Ra），并在基线和每个循环间隔使用分析电子天平评估材料的磨损情况。对获得的数据进行单因素方差分析和事后多重比较检验。使用配对t检验对每种材料的循环间隔进行比较。还进行了扫描电子显微镜（SEM）分析。
与其他材料相比，树脂复合材料Filtek P 90在最终刷牙循环后的重量损失百分比有所增加。刷牙显著增加了所有复合材料的粗糙度（Ra）。刷牙后，Filtek Z250比其他树脂明显更粗糙，其次是Filtek P 90、Spectrum TPH 3和Filtek Z350 XT。然而，SEM图像显示，刷牙后“亚微米混合”样本的表面形貌彼此相比有严重变化。
所有材料的磨损和表面粗糙度均随每个循环间隔增加，且一种复合树脂的表面粗糙度增加幅度高于其他三个测试品牌的复合树脂。测试样本之间的重量损失差异不大。
