Effect of computer-aided design/computer-aided manufacturing bleach shade ceramic thickness on its light transmittance and microhardness of light-cured resin cement.

Q2 Dentistry

Dental Research Journal Pub Date : 2024-08-21 eCollection Date: 2024-01-01

Pardis Sheibani, Ghazaleh Ahmadizenous, Behnaz Esmaeili, Ali Bijani

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引用次数: 0

Abstract

Background: This study aimed to measure light transmittance (LT) through various thicknesses of computer-aided design/computer-aided manufacturing bleach shade ceramics and to assess the Vickers microhardness (VMH) of underlying light-cured resin cement.

Materials and methods: In this in vitro study, a total of 90 ceramic discs (VITA Mark II [VM], VITA Suprinity, and CELTRA Duo) were prepared in 0.5, 1, and 1.5 mm thicknesses. To measure LT, the Valo light-curing unit was placed in direct contact with the ceramics on the radiometer. The average LT was recorded after three measurements. In addition, 90 specimens of light-cured resin cement (Allcem Veneer) were cured in Teflon molds (0.5 mm in depth) beneath ceramic pieces. Ten specimens of resin cement were also cured without the presence of ceramic as a control group. VMH of the cement specimens was reported. The data were analyzed by one-way analysis of variance and multiple comparison tests (α =0.05) in SPSS version 17.

Results: In each ceramic group, LT was negatively related to ceramic thickness (P < 0.05). At a thickness of 1.5 mm among all ceramic types, the VMH of resin cement was significantly decreased (P < 0.05). In all thicknesses, the VMH of resin cement was lower significantly than the control group, except for the thickness of 0.5 mm of VM.

Conclusion: According to the results of this study, light-cured cement is not a suitable option for cementing the studied bleach shade ceramics. Furthermore, the thickness of the ceramic has a significant effect on LT (P < 0.05), unlike VMH.

本刊更多论文

计算机辅助设计/计算机辅助制造漂白阴干陶瓷厚度对光固化树脂水泥透光率和微硬度的影响

背景：本研究旨在测量不同厚度的计算机辅助设计/计算机辅助制造漂白釉陶瓷的透光率（LT），并评估底层光固化树脂粘结剂的维氏硬度（VMH）：在这项体外研究中，共制备了 90 个陶瓷盘（VITA Mark II [VM]、VITA Suprinity 和 CELTRA Duo），厚度分别为 0.5、1 和 1.5 毫米。测量时，将 Valo 光固化装置与辐射计上的陶瓷直接接触。经过三次测量后，记录下LT的平均值。此外，90 个光固化树脂水泥（Allcem Veneer）试样在特氟龙模具（深度为 0.5 毫米）中固化，置于陶瓷片下方。作为对照组，还固化了 10 个不含陶瓷的树脂水泥试样。报告了水泥试样的 VMH。数据采用 SPSS 17 版进行单因素方差分析和多重比较检验（α =0.05）：在各陶瓷组中，LT 与陶瓷厚度呈负相关（P < 0.05）。在所有陶瓷类型中，厚度为 1.5 毫米时，树脂水门汀的 VMH 明显降低（P < 0.05）。除 0.5 mm 厚度的 VM 外，所有厚度的树脂水门汀的 VMH 都明显低于对照组：根据这项研究的结果，光固化水门汀并不适合用于粘接所研究的漂白色调陶瓷。此外，与 VMH 不同，陶瓷的厚度对 LT 有显著影响（P < 0.05）。

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

Dental Research Journal Dentistry-Dentistry (all)

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

52 weeks

期刊介绍： Dental Research Journal, a publication of Isfahan University of Medical Sciences, is a peer-reviewed online journal with Bimonthly print on demand compilation of issues published. The journal’s full text is available online at http://www.drjjournal.net. The journal allows free access (Open Access) to its contents and permits authors to self-archive final accepted version of the articles on any OAI-compliant institutional / subject-based repository. The journal will cover technical and clinical studies related to health, ethical and social issues in field of Dentistry. Articles with clinical interest and implications will be given preference.