目的:评估抛光和分层厚度对3D打印咬合板材料耐磨性的影响。
方法:在具有数字光处理技术的3D打印机上,使用V-Print夹板树脂以3毫米厚的圆盘形式生产了具有3种不同层厚度(50,75,100µm)的样品。(对于每个厚度,n=16)根据制造商的说明洗涤和固化所有试样。每层厚度的一半样品用碳化硅纸抛光。对所有样品进行120,000次咀嚼模拟器循环,以进行2体磨损测试。磨损试验前后,用激光扫描仪扫描样本,使用3D分析程序覆盖图像,并计算体积损失。在扫描电子显微镜下检查样品的磨损模式。使用Shapiro-Wilk检验进行统计评估,双向方差分析,单向方差分析,和Tukey事后检验(α=0.05)。
结果:虽然抛光对咬合板的磨损量有显着影响(p=0.003),层厚度(p=0.105)和它们之间的相互作用抛光和层厚度(p=0.620)没有显着影响磨损量。不管抛光,观察到D50的最低平均磨损(0.064mm3),其次是D75(0.078mm3),和D100(0.096mm3)。然而,仅在抛光的D50和未抛光的D100之间观察到显著差异。
结论:抛光的3D打印咬合板树脂比未抛光的树脂显示出更高的耐磨性,无论层的厚度。
结论:由于50µm及以上的不同层厚度对材料的耐磨性没有影响,100μm的层厚度可能是更快的印刷的优选。然而,抛光咬合夹板可以减少磨损量并改善临床性能。
To evaluate the effect of polishing and layering thickness on the wear resistance of 3D-printed occlusal splint materials.
Specimens with 3 different layer thicknesses (50, 75, 100 µm) were produced in the form of a disc 3 mm thick using V-Print splint resin on a 3D-printer with digital light processing technology. (n = 16 for each thickness) All specimens were washed and cured according to the manufacturer\'s instructions. Half of the specimens of each layer thickness were polished with silicon carbide papers. All specimens were subjected to 120.000 cycles of a chewing simulator for 2-body wear tests. Before and after the wear test, the specimens were scanned with a laser scanner, and the images were overlaid using a 3D analysis program and the volume loss was calculated. The wear patterns of the specimens were examined under a scanning electron microscope. Statistical evaluation was performed using a Shapiro-Wilk test, 2-way ANOVA, 1-way ANOVA, and Tukey post hoc test (α = 0.05).
While polishing had a significant effect (p = 0.003) on the wear volume of the occlusal splints, layer thickness (p = 0.105) and their interaction between polishing and layer thickness (p = 0.620) did not significantly affect the wear volume. Regardless of the polishing, the lowest mean wear was observed for D50 (0.064 mm3), followed by D75 (0.078 mm3), and D100 (0.096 mm3). However, a significant difference was observed only between polished D50 and unpolished D100.
The polished 3D-printed occlusal splint resin showed higher wear resistance than the unpolished one, regardless of the layer thickness.
Since different layer thicknesses of 50 µm and greater had no effect on the wear resistance of the material, a layer thickness of 100 µm may be preferred for faster printing. However, polishing occlusal splints may reduce the amount of wear and improve clinical performance.