Effect of particle deposition parameters on silica coating of zirconia using a chairside air-abrasion device.
Effect of particle deposition parameters on silica coating of zirconia using a chairside air-abrasion device.
复制标题
使用椅旁空气研磨装置观察颗粒沉积参数对氧化锆二氧化硅涂层的影响。
DOI：
10.3290/j.jad.a29718
复制
发表时间：
2013
影响因子：
3.3
通讯作者：
Lippo Lassilla
中科院分区：
文献类型：
--
作者：
M. Ozcan;J.H.A.M. Raadschelders;P. Vallittu;Lippo Lassilla
目的
评估喷嘴距离、喷嘴角度和沉积持续时间对通过空气磨损在氧化锆上获得的二氧化硅含量的影响。
材料和方法
获得圆盘状氧化锆（LAVA，3M ESPE）（直径：10mm，厚度：2mm）样本（N = 54）。它们依次使用 600、800 和 1200 粒度的碳化硅砂纸进行湿磨精加工，并进行超声波清洁。将样本安装在专门设计的装置中，使椅旁空气研磨装置能够在标准条件下运行。将氧化铝涂覆的二氧化硅颗粒（CoJet Sand，3M ESPE）沉积在氧化锆盘表面上，改变以下参数：a）喷嘴距离（2、5、10毫米），b）在每个陶瓷盘上三个位置的两个喷嘴角度（45和90度）、2.5巴压力下的沉积持续时间（5、13、20秒）。然后将样品表面轻轻风干 20 秒。使用能量色散 X 射线光谱 (EDS) (150X) 在 0.8 mm x 0.6 mm 的区域（每组 n = 3）测量每个圆盘上 3 个表面的二氧化硅含量（重量百分比 (wt%)）。使用SEM评估表面形貌。使用方差分析和 Tukey 检验 (α = 0.05) 分析数据。
结果
喷嘴角度 (p = 0.003) 和沉积持续时间 (p = 0.03) 对结果有显着影响，但喷嘴距离 (p = 0.569) 没有影响。与 90 度喷嘴角度（10.7 至 18.6 wt%）相比，在所有距离-持续时间组合中，当喷嘴与表面成 45 度角时（16.7 至 28.2 wt%），获得了显着更高的二氧化硅含量（wt%）（p < 0.001）。 20 秒沉积持续时间后的二氧化硅含量显着高于 13 秒沉积时间后的二氧化硅含量 (p < 0.05)。 EDS 分析表明基板上不仅有 Si，还显示有 Al、Zr 和 O 痕迹。 SEM 图像表明，喷嘴距离为 2 mm 的沉积通常会在氧化锆中产生空化。
结论
当喷嘴与表面成 45 度且喷嘴距离超过 2 毫米并持续 20 秒时，可以使用炭化空气研磨装置实现有效的二氧化硅沉积。
PURPOSE
To evaluate the effect of nozzle distance, nozzle angle, and deposition duration on the silica content attained on zirconia by air abrasion.
MATERIALS AND METHODS
Disk-shaped zirconia (LAVA, 3M ESPE) (diameter: 10 mm, thickness: 2 mm) specimens (N = 54) were obtained. They were wet-ground finished using 600-, 800-, and 1200-grit silicone carbide abrasive papers in sequence and ultrasonically cleaned. The specimens were mounted in a specially designed apparatus that allowed the chairside air-abrasion device to be operated under standard conditions. Alumina-coated silica particles (CoJet Sand, 3M ESPE) were deposited on the zirconia disk surfaces varying the following parameters: a) nozzle distance (2, 5, 10 mm), and b) deposition duration (5, 13, 20 s) at two nozzle angles (45 and 90 degrees) under 2.5 bar pressure at three locations on each ceramic disk. The specimen surfaces were then gently air dried for 20 s. Silica content in weight percentage (wt%) was measured from 3 surfaces on each disk using Energy Dispersive X-ray Spectroscopy (EDS) (150X) in an area of 0.8 mm x 0.6 mm (n = 3 per group). Surface topographies were evaluated using SEM. Data were analyzed using ANOVA and Tukey's tests (α = 0.05).
RESULTS
Nozzle angle (p = 0.003) and deposition duration (p = 0.03) significantly affected the results, but nozzle distance (p = 0.569) did not. A significantly higher amount of silica (wt%) was achieved when the nozzle angle was 45 degrees to the surface in all distance-duration combinations (16.7 to 28.2 wt%) compared to the 90-degree nozzle angle (10.7 to 18.6 wt%) (p < 0.001). The silica amount was significantly higher after 20-s deposition duration than after 13 s (p < 0.05). EDS analysis demonstrated not only Si but also Al, Zr, and O traces on the substrate. SEM images indicated that deposition at a nozzle distance of 2 mm often created cavitations in zirconia.
CONCLUSION
Effective silica deposition using a charside air-abrasion device can be achieved when the nozzle is held at 45 degrees to the surface with more than 2-mm nozzle distance for 20 s.