Xing Wenzhong, Chen Xiaodong, Ren Dafei, Zhan Kangru, Wang Yining
Department of Prosthetics, Dalian Stomatological Hospital, Dalian, 116021, China.
Key Laboratory for Oral Biomedical Engineering, Ministry of Education, School and Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan, 430079, China.
Odontology. 2017 Oct;105(4):460-466. doi: 10.1007/s10266-016-0287-9. Epub 2017 Jan 10.
The objective of this study was to analyze the effects of ceramic material thickness and resin cement shade on the color matching of ceramic veneers at the gray tooth structures. Seventy-two artificial maxillary right central incisor teeth (C2 shade) were prepared according to veneer tooth preparation in practice. Ceramic materials (LT, A2 shade, IPS e.max Press) were selected to fabricate the 0.50- and 0.75-mm thick veneers at the body region. The ceramic veneer specimens were bonded to the artificial teeth by the 6 shades of resin cements (Variolink Veneer: shades of HV+3, LV-2, LV-3; and RelyX Veneer: shades of WO, TR, A3). A clinical spectrophotometer (Crystaleye, Olympus) was used to measure the color parameters. The color differences (ΔE values) of ceramic veneers and A2 shade tab (Vitapan Classical, Vita) and C* values were calculated. The results of three-way ANOVA indicated that the ΔE values of ceramic veneer and A2 shade tab were significantly different in the thickness of ceramic materials, shades of resin cements, and measuring regions (p < 0.001). There were significant differences in 0.50-mm-thick ceramic veneers that exhibited higher ΔE values compared with veneers that were 0.75-mm thick. Tukey's HSD test showed that the average ΔE values in body region were significantly smaller than that in cervical and incisal regions. The color matching of ceramic veneers was significantly influenced not only by the ceramic thickness and the resin cement shades but also the tooth regions.
本研究的目的是分析陶瓷材料厚度和树脂水门汀颜色对灰色牙体结构上陶瓷贴面颜色匹配的影响。按照临床实践中的贴面牙体预备方法，对72颗人工上颌右侧中切牙（C2色）进行预备。选用陶瓷材料（LT，A2色，IPS e.max Press）在牙体中部制作0.50毫米和0.75毫米厚的贴面。用6种颜色的树脂水门汀（Variolink Veneer：HV+3、LV-2、LV-3色；以及RelyX Veneer：WO、TR、A3色）将陶瓷贴面试件粘结到人工牙上。使用临床分光光度计（Olympus Crystaleye）测量颜色参数。计算陶瓷贴面与A2色比色板（Vitapan Classical，Vita）的颜色差异（ΔE值）和C*值。三因素方差分析结果表明，陶瓷贴面与A2色比色板的ΔE值在陶瓷材料厚度、树脂水门汀颜色和测量区域方面存在显著差异（p<0.001）。0.50毫米厚的陶瓷贴面与0.75毫米厚的贴面相比，ΔE值更高，存在显著差异。Tukey's HSD检验表明，牙体中部的平均ΔE值显著小于颈部和切端区域。陶瓷贴面的颜色匹配不仅受到陶瓷厚度、树脂水门汀颜色的显著影响, 还受到牙体区域的影响。
