三种玻璃离子水门汀在体外凝固过程中及长达15天，以及在体内5至10年后的显微硬度。

Microhardness of three glass-ionomer cements during setting and up to 15 days in vitro, and after 5 to 10 years in vivo.

作者信息

Hershkovitz Fanny, Cohen Ornit, Zilberman Uri

出版信息

Quintessence Int. 2020;51(6):440-446. doi: 10.3290/j.qi.a44372.

DOI:10.3290/j.qi.a44372

PMID:32253393

Abstract

OBJECTIVES

To compare the microhardness and ion content of three glass-ionomer cements (GICs) during setting and up to 15 days, to composite resin-based material in vitro, and after 5 to 10 years in vivo.

METHOD AND MATERIALS

Disks of three GICs, EQUIA Fil, Riva Self Cure, and Ketac Molar were examined in vitro for microhardness using Vickers indentations after 15 to 60 minutes, 24 hours, and 8 and 15 days, and compared to composite material, Spectrum. The ion content of the GIC and composite was analyzed using the energy dispersive spectroscopy program of a scanning electron microscope. A primary second molar restored with GIC normally exfoliated after 5 years, and a third molar restored with GIC extracted due to periodontitis after 10 years, were sliced through the restoration buccolingually, and the microhardness of the restoration and of the dentin was measured.

RESULTS

In comparison to composite material, the Vickers value for the GICs were similar or better after 24 hours to 15 days. The amount of fluorine was three times higher in EQUIA Fil and Riva Self Cure in comparison with Ketac Molar, after 20 days. After 5 years in vivo, the microhardness of GICs was similar to dentin and after 10 years it was significantly higher than that of the dentin.

CONCLUSION

The microhardness of GICs was comparable to composite material after only 24 hours. In vivo the microhardness of GICs increased and after 10 years in vivo it was higher than that of the dentin. After 20 days the amount of fluorine was still high in Riva Self Cure and EQUIA Fil.

摘要

目的

比较三种玻璃离子水门汀（GIC）在凝固过程中及直至15天、体外与复合树脂基材料相比，以及体内5至10年后的显微硬度和离子含量。

方法和材料

对三种GIC（EQUIA Fil、Riva Self Cure和Ketac Molar）的圆盘在体外分别于15至60分钟、24小时、8天和15天后使用维氏压痕法检测显微硬度，并与复合材料Spectrum进行比较。使用扫描电子显微镜的能量色散光谱程序分析GIC和复合材料的离子含量。一颗用GIC修复的第一恒磨牙在5年后正常脱落，一颗用GIC修复的第三恒磨牙在10年后因牙周炎被拔除，将修复体沿颊舌向切片，测量修复体和牙本质的显微硬度。