Effect of graphene oxide on the biaxial flexural strength and translucency of ultrathin monolithic zirconia.

IF 1.9 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of oral science Pub Date : 2024-12-15 DOI:10.2334/josnusd.24-0228

Nazmiye Şen

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Abstract

Purpose: The purpose of this study was to investigate the influence of graphene oxide (GO) and hydrothermal aging on the biaxial flexural strength (BFS) and translucency (TP) of ultrathin monolithic zirconia with different yttria concentrations.

Methods: Disc shaped specimens (n = 120) were milled using zirconia blocks (YZ-HT [HT], YZ-ST [ST], and YZ-XT [XT]) with a diameter of 15.0 mm and a thickness of 0.5 mm. Half of the specimens were immersed in 0.2 wt% GO-water dispersion (HTG, STG, and XTG) and subjected to hydrothermal aging for 10 h. The TP was measured using a reflection spectrophotometer and BFS was tested in a universal testing machine. Data were statistically analyzed with 2-way analysis of variance followed by post-hoc comparisons (α = 0.05).

Results: The lowest mean TP was found in the group of STG aged for 10 h. Hydrothermal aging significantly decreased the TP values in the groups of HTG, STG, and XTG (P < 0.05). Significantly higher TP values were obtained in the groups of XT. Immersion in 0.2 wt% GO-water dispersion significantly improved the BFS values of STG, and XTG for the control and aged groups.

Conclusion: GO leads to decreased translucency while improving BFS for highly translucent zirconia ceramics.

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目的：本研究旨在探讨氧化石墨烯（GO）和水热老化对不同钇浓度的超薄整体氧化锆的双轴抗弯强度（BFS）和半透明度（TP）的影响：使用直径为 15.0 毫米、厚度为 0.5 毫米的氧化锆块（YZ-HT [HT]、YZ-ST [ST] 和 YZ-XT [XT]）研磨圆盘状试样（n = 120）。一半的试样（HTG、STG 和 XTG）浸入 0.2 wt% 的 GO-水分散液中，并进行 10 小时的水热老化。数据采用双向方差分析进行统计分析，然后进行事后比较（α = 0.05）：水热老化显著降低了 HTG、STG 和 XTG 组的 TP 值（P < 0.05）。XT 组的 TP 值明显更高。在 0.2 wt% 的 GO 水分散液中浸泡可显著改善 STG 和 XTG 对照组和老化组的 BFS 值：结论：GO 会降低半透明度，同时改善高半透明氧化锆陶瓷的 BFS。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of oral science DENTISTRY, ORAL SURGERY & MEDICINE-MATERIALS SCIENCE, BIOMATERIALS

CiteScore

3.80

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0.00%

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