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Effect of Thickness, Translucency, and Substrates on the Masking Ability of a Polymer-Infiltrated Ceramic-Network Material

Journal of Esthetic and Restorative Dentistry(2023)SCI 3区

Szentkiralyi St 47

Cited 7|Views19
Abstract
ObjectiveThe aim of this in vitro study is to evaluate the masking ability of polymer-infiltrated ceramic-network materials (PICN) with different translucencies and thicknesses on multiple types of substrates. Materials and MethodsCeramic samples were prepared of VITA ENAMIC blocks in two different translucencies (2M2-T, 2M2-HT) in a thickness range of 0.5-2.5 mm (+/- 0.05 mm). Layered specimens were obtained using composite substrates in nine shades and transparent try-in paste. Spectral reflectance of specimens was measured using a Konica Minolta CM-3720d spectrophotometer and D65 standard illumination. CIEDE2000 color difference (Delta E-00) between two samples was evaluated using 50%:50% perceptibility and acceptability thresholds. Specular component of the reflection was examined with Specular Component Excluded (SCE) and Included (SCI) settings. Statistical evaluation was performed by linear regression analysis, Kruskal-Wallis test, and multiplicative effect analysis. ResultsAn increase in thickness of 0.5 mm reduces Delta E-00 of HT samples to 73.5%, of T samples to 60.5% (p < 0.0001). Five substrates with HT specimens, and three substrates with T specimens had significantly different results from average (p < 0.05). There is a significant difference between SCE and SCI data depending on the wavelength (p < 0.0001). ConclusionsMasking ability of PICN materials is influenced by the thickness and translucency of the ceramic, and by the substrate. Reflection of the examined PICN material is characterized by both diffuse and specular reflection. Clinical SignificanceAlthough PICN materials have been available on the market for 10 years now, there is a lack of information regarding their masking ability. Acquiring in-depth data and thereby practical experience of the factors affecting the esthetics of PICN materials is essential for creating perfectly lifelike restorations.
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color difference,dental ceramic,masking ability,PICN material,spectrophotometer,substrate,thickness
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要点】:该论文评估了不同透明度和厚度的聚合物渗透陶瓷网络材料(PICN)在多种基材上的遮蔽能力,发现遮蔽能力受陶瓷的厚度、透明度及基材的影响,并且PICN材料的反射特性兼具漫反射和镜面反射。

方法】:采用VITA ENAMIC块制备两种不同透明度(2M2-T, 2M2-HT)和厚度(0.5-2.5mm)的陶瓷样本,通过复合基材制备层状试样,使用 Konica Minolta CM-3720d 光谱光度计和D65标准光源测量试样的光谱反射率,并采用CIEDE2000色差公式评估样本间颜色差异。

实验】:实验结果显示,HT样本厚度每增加0.5mm,Delta E-00减少73.5%;T样本减少60.5%(p < 0.0001)。对于HT样本,有五个基材的结果与平均值有显著差异;对于T样本,有三个基材有显著差异(p < 0.05)。不同波长下,SCE和SCI数据之间存在显著差异(p < 0.0001)。