Dionysopoulos Dimitrios, Tolidis Kosmas, Tortopidis Dimitrios, Gerasimou Paris, Sfeikos Thrasyvoulos
Department of Operative Dentistry, School of Dentistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.
Department of Fixed Prostheses and Implant Prosthodontics, School of Dentistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.
Odontology. 2018 Oct;106(4):429-438. doi: 10.1007/s10266-018-0338-5. Epub 2018 Jan 22.
This paper details a novel method to improve wear resistance of dental glass ionomer cement (GIC) restorations. The purpose of this in vitro study was to evaluate the effect of a calcium chloride (CaCl) solution treatment on surface hardness, surface roughness, compressive strength, water sorption and solubility of three conventional glass ionomer cements (GICs). Additionally, the changes of the Ca composition and morphology of the surface of the tested GICs were also investigated. The experimental groups of the study were: Group 1 (control) specimens after mixing were left in the mold to set without any treatment for 5 min; Group 2 specimens were left in the mold to set for 5 min and then each specimen was immersed in 10 ml of 42.7 wt% CaCl solution for 60 s. Statistical analysis was performed using one-way ANOVA and Tukey post hoc tests (a = 0.05). Calcium chloride solution treatment increased surface hardness of the GICs compared to control groups (P < 0.05), while surface roughness and compressive strength did not change after the treatment (P > 0.05). Reduction in water sorption and solubility was detected but not in all CaCl solution-treatment groups. No alterations were observed in surface morphology of the GICs, while surface calcium composition was increased after the treatment (P < 0.05). The use of a CaCl solution immediately after initial setting of GICs may be advantageous for some properties of the materials and possibly leads to improved prognosis and wear resistance of their restorations.
本文详细介绍了一种提高牙科玻璃离子水门汀（GIC）修复体耐磨性的新方法。这项体外研究的目的是评估氯化钙（CaCl）溶液处理对三种传统玻璃离子水门汀（GIC）的表面硬度、表面粗糙度、抗压强度、吸水性和溶解性的影响。此外，还研究了受试GIC表面钙组成和形态的变化。该研究的实验组为：第1组（对照组）混合后的试件留在模具中静置5分钟，不进行任何处理；第2组试件留在模具中静置5分钟，然后将每个试件浸入10毫升42.7重量%的CaCl溶液中60秒。采用单因素方差分析和Tukey事后检验进行统计分析（α = 0.05）。与对照组相比，氯化钙溶液处理提高了GIC的表面硬度（P < 0.05），而处理后表面粗糙度和抗压强度没有变化（P > 0.05）。检测到吸水性和溶解性降低，但并非在所有氯化钙溶液处理组中都有降低。GIC的表面形态未观察到变化，而处理后表面钙组成增加（P < 0.05）。在GIC初始凝固后立即使用氯化钙溶液可能对材料的某些性能有利，并可能改善其修复体的预后和耐磨性。
