Translucency and colour masking ability of hybrid CAD/CAM materials with different thicknesses: in vitro study.

IF 2.5 Q2 DENTISTRY, ORAL SURGERY & MEDICINE
Zeinab Omar Tolba, Eman Ezzat Youssef Hassanien
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Abstract

Objective: To evaluate effect of material thickness and translucency of two different hybrid CAD/CAM materials on their masking ability.

Materials and methods: 40 rectangular-shaped specimens (12 × 14 mm) were obtained from Vita Enamic and Grandio blocks at 0.5 and 1 mm-thick (n = 10/group). Colour parameters of specimens were measured on PMMA tooth-coloured replica backgrounds (A2, C4) and black, white backings using dental spectrophotometer. Translucency parameter (TP) and masking ability (∆E00) values of tested materials with 0.5, and 1 mm thicknesses were calculated. Quantitative variables were compared between groups using student t-test.

Results: TP and ∆E00 significantly decreased as thickness of tested materials increased. Grandio showed significantly higher TP values. There were significantly lower ΔE00 values for Vita Enamic compared to Grandio at 1 mm thickness and inversely insignificant at 0.5 mm. The 0.5 mm-thick ∆E00 of tested materials was above clinical acceptability threshold, whereas, 1 mm-thick did not exceed showing better masking properties.

Conclusions: Thickness is more effective for colour masking than translucency. In thin thickness, the masking ability is less effective, irrespective of tested materials. Translucency of tested materials was affected by their composition. Both hybrid CAD/CAM materials are promising alternatives for masking dark discolouration at 1 mm-thick.

Abstract Image

不同厚度的 CAD/CAM 混合材料的透光性和遮色能力:体外研究。
目的:评估两种不同的混合 CAD/CAM 材料的厚度和半透明度对其遮盖能力的影响:评估两种不同的 CAD/CAM 混合材料的厚度和半透明度对其遮盖能力的影响。材料和方法:从厚度分别为 0.5 毫米和 1 毫米的 Vita Enamic 和 Grandio 块体中获得 40 个矩形试样(12 × 14 毫米)(n = 10/组)。使用牙科分光光度计在 PMMA 牙色复制品背景(A2、C4)和黑色、白色衬底上测量试样的颜色参数。计算厚度分别为 0.5 毫米和 1 毫米的受测材料的半透明参数 (TP) 值和遮蔽能力 (∆E00) 值。使用学生 t 检验比较各组之间的定量变量:结果:随着测试材料厚度的增加,TP 和 ∆E00 明显降低。Grandio 的 TP 值明显更高。在厚度为 1 毫米时,Vita Enamic 的 ΔE00 值明显低于 Grandio,而在厚度为 0.5 毫米时,两者的ΔE00 值不显著。测试材料 0.5 毫米厚度的ΔE00 值高于临床接受阈值,而 1 毫米厚度的ΔE00 值未超过临床接受阈值,显示出更好的遮盖特性:结论:厚度比半透明度更能有效遮盖颜色。结论:厚度比半透明度更能有效遮盖颜色,厚度越薄,遮盖能力越差,与测试材料无关。测试材料的半透明性受其成分的影响。这两种混合 CAD/CAM 材料都是掩蔽 1 毫米厚度深色变色的理想替代品。
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
BDJ Open
BDJ Open Dentistry-Dentistry (all)
CiteScore
3.70
自引率
3.30%
发文量
34
审稿时长
30 weeks
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