Keskin Cangül, Sariyilmaz Evren, KeleŞ Ali
Department of Endodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey.
Department of Endodontics, Faculty of Dentistry, Ordu University, Ordu, Turkey.
Aust Endod J. 2019 Dec;45(3):311-316. doi: 10.1111/aej.12318. Epub 2018 Oct 18.
The present study aimed to evaluate the effect of sodium perborate on the compressive strength of calcium silicate-based materials. ProRoot wMTA, MTA Plus, NeoMTA Plus and Biodentine discs with 5 mm thickness and 4 mm diameter were prepared. Thirty discs from each material were used for compressive strength testing and divided into two groups: control and bleaching (n = 15). The sodium perborate was mixed with 30% hydrogen peroxide in a creamy consistency and placed on the surface of the specimens. Specimens were tested in an Instron machine, and compressive strength values were recorded and compared. The data were analysed using one-way anova and post hoc Tukey tests. Compressive strength of all tested materials significantly decreased after bleaching (P < 0.05). SEM examination revealed deterioration on materials' surfaces after bleaching. Application of sodium perborate and hydrogen peroxide reduced the compressive strength of ProRoot wMTA, MTA Plus, NeoMTA Plus and Biodentine.
本研究旨在评估过硼酸钠对硅酸钙基材料抗压强度的影响。制备了厚度为5毫米、直径为4毫米的ProRoot wMTA、MTA Plus、NeoMTA Plus和Biodentine圆盘。每种材料的30个圆盘用于抗压强度测试，并分为两组：对照组和漂白组（n = 15）。将过硼酸钠与30%的过氧化氢混合成奶油状稠度，并置于试样表面。在Instron机器上对试样进行测试，记录并比较抗压强度值。数据采用单因素方差分析和事后Tukey检验进行分析。所有测试材料在漂白后的抗压强度均显著降低（P < 0.05）。扫描电子显微镜检查显示漂白后材料表面出现劣化。过硼酸钠和过氧化氢的应用降低了ProRoot wMTA、MTA Plus、NeoMTA Plus和Biodentine的抗压强度。
