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Effect of Pressure and Particle Size During Aluminum Oxide Air Abrasion on the Flexural Strength of Disperse-Filled Composite and Polymer-Infiltrated Ceramic Network Materials

机译:氧化铝空气磨蚀过程中的压力和粒度对分散填充复合材料和聚合物渗透陶瓷网络材料抗弯强度的影响

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摘要

Esthetic dental computer-aided design/computer-aided manufacturing (CAD/CAM) polymers such as disperse-filled composites (DFC) and polymer-infiltrated ceramic networks (PICN) should be subjected to surface treatment before bonding. However, such treatment can lead to defect formation and a decrease in strength. Therefore, in this study, we compared the flexural strengths of DFC and PICN materials air-abraded with alumina particles of different sizes at different pressures. In addition to Weibull analysis, the samples (untreated and treated) were characterized by scanning electron microscopy and atomic force microscopy. Both DFC and PICN exhibited the lowest flexural strength at large particle sizes and high pressures. Therefore, we optimized the air abrasion parameters to maintain the flexural strength and significantly increase surface roughness. In the case of DFC, the optimal particle size and pressure conditions were 50 µm at 2 bar and 110 µm at 1 bar, while for PICN, the best performance was obtained using Al O particles with a size of 50 µm at 1 bar. This study reveals that optimization of the surface treatment process is crucial in the fabrication of high-performance clinical materials for dental restorations.
机译:美学的牙科计算机辅助设计/计算机辅助制造(CAD / CAM)聚合物(例如分散填充的复合材料(DFC)和聚合物渗透的陶瓷网络(PICN))应在粘合之前进行表面处理。但是,这样的处理会导致缺陷的形成和强度的降低。因此,在这项研究中,我们比较了在不同压力下用不同尺寸的氧化铝颗粒进行空气研磨的DFC和PICN材料的抗弯强度。除威布尔分析外,还通过扫描电子显微镜和原子力显微镜对样品(未处理和已处理)进行了表征。 DFC和PICN在大粒径和高压下均表现出最低的弯曲强度。因此,我们优化了空气磨耗参数,以保持弯曲强度并显着增加表面粗糙度。在DFC的情况下,最佳的粒径和压力条件是2 bar时为50 µm,1 bar时为110 µm,而对于PICN,使用1 bar时50 µm的Al O颗粒可获得最佳性能。这项研究表明,表面处理工艺的优化对于制造用于牙修复体的高性能临床材料至关重要。

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