Łagodzińska Paulina, Dejak Beata, Krasowski Michał, Konieczny Bartłomiej
Department of Prosthodontics, Medical University of Lodz, 92-209 Łódź, Poland.
University Laboratory of Material Research, Medical University of Lodz, 92-209 Łódź, Poland.
Materials (Basel). 2023 Aug 2;16(15):5419. doi: 10.3390/ma16155419.
The surface of zirconia-based dental ceramic restorations require preparation prior to adhesive cementation. The purpose of this study was to assess the influence of airborne-particle abrasion with different sizes of alumina particles (50 μm, 110 μm, or 250 μm) on the mechanical strength of zirconia-based ceramics' frameworks and on the extent of phase transformations. A fracture resistance test was performed. The central surface of the frameworks was subjected to a load [N]. The identification and quantitative determination of the crystalline phase present in the zirconia specimens was assessed using X-ray diffraction. The Kruskal-Wallis one-way analysis of variance was used to establish significance (α = 0.05). The fracture resistance of zirconia-based frameworks significantly increases with an increase in the size of alumina particles used for air abrasion: 715.5 N for 250 μm alumina particles, 661.1 N for 110 μm, 608.7 N for 50 μm and the lowest for the untreated specimens (364.2 N). The X-ray diffraction analysis showed an increase in the monoclinic phase content after air abrasion: 50 μm alumina particles-26%, 110 μm-40%, 250 μm-56%, and no treatment-none. Air abrasion of the zirconia-based dental ceramics' surface with alumina particles increases the fracture resistance of zirconia copings and the monoclinic phase volume. This increase is strongly related to the alumina particle size.
基于氧化锆的牙科陶瓷修复体表面在粘结粘固前需要进行预处理。本研究的目的是评估使用不同尺寸的氧化铝颗粒（50μm、110μm或250μm）进行空气颗粒研磨对基于氧化锆的陶瓷框架的机械强度以及相变程度的影响。进行了抗断裂试验。框架的中心表面承受载荷[N]。使用X射线衍射评估氧化锆试样中存在的晶相的鉴定和定量测定。采用Kruskal-Wallis单因素方差分析确定显著性（α = 0.05）。随着用于空气研磨的氧化铝颗粒尺寸的增加，基于氧化锆的框架的抗断裂性显著增加：250μm氧化铝颗粒为715.5N，110μm为661.1N，50μm为608.7N，未处理试样最低（364.2N）。X射线衍射分析表明，空气研磨后单斜相含量增加：50μm氧化铝颗粒为26%，110μm为40%，250μm为56%，未处理则无。用氧化铝颗粒对基于氧化锆的牙科陶瓷表面进行空气研磨可提高氧化锆冠的抗断裂性和单斜相体积。这种增加与氧化铝颗粒尺寸密切相关。
