铸瓷贴面厚度对修复体颜色匹配性的影响

发布时间：2018-08-27 14:51

【摘要】：目的:分析瓷材料厚度变化对瓷贴面修复体颜色匹配性的影响。方法:选用36颗树脂人工牙按临床要求进行贴面牙体预备。制作二硅酸锂热压铸陶瓷贴面(HT和LT瓷块),按修复体中1/3的厚度分为0.50mm、0.75mm和1.00mm组(n=6)。使用树脂粘接剂将瓷贴面粘接于预备后的树脂人工牙上。比色仪测量瓷贴面试样颈部、中部和切端区域的色度参数。计算瓷贴面试样与A2色标(Vita Classical比色板)的色差值△E。结果:3种厚度瓷贴面修复体与A2色标的色差值范围2.17~6.60,其中0.75mm和1.0mm组HT瓷贴面试样在颈部和中部与A2色标的色差值小于3.3。双因素方差分析表明瓷材料厚度和测色部位显著影响瓷贴面试样与A2色标的色差值(P0.001)。结论:瓷材料厚度变化影响瓷贴面修复体的颜色参数。随瓷材料厚度增加,LT瓷贴面亮度降低色彩饱和度增加,而HT瓷贴面亮度增加色彩饱和度降低。
[Abstract]:Objective: to analyze the effect of the thickness of porcelain on the color matching of ceramic veneer prosthesis. Methods: 36 resin artificial teeth were used to prepare veneer teeth according to clinical requirements. Lithium disilicate hot die casting ceramic veneer (HT and LT ceramic) was prepared and divided into 0. 50 mm and 0. 75 mm and 1.00mm group (NX 6) according to the thickness of 1 / 3 of the restoration. The porcelain veneer is bonded to the prepared resin artificial teeth with resin adhesive. The chromaticity parameters of the neck, middle and end regions of the porcelain veneer were measured by colorimetry. The chromatic difference between the porcelain veneer sample and the A2 (Vita Classical colorimetric plate was calculated. Results the chromatic aberration between the restoration and A2 was 2.17 ~ 6.60, and the chromatic difference between the HT veneer of 0.75mm and 1.0mm group was less than 3.3 in the neck and middle part of the porcelain veneer and A2 color standard. Two-factor variance analysis showed that the thickness and color measuring position of porcelain material significantly affected the chromatic difference between the porcelain veneer sample and A2 color standard (P0.001). Conclusion: the change of the thickness of ceramic material affects the color parameters of ceramic veneer prosthesis. With the increase of the thickness of the ceramic material, the brightness of the LT ceramic veneer decreases the color saturation increases, while the color saturation decreases with the increase of the brightness of the HT ceramic veneer.
【作者单位】：大连市口腔医院修复科;保定市第二医院口腔科;
【基金】：大连市卫计委科技项目(编号:WSJ/KJC-2014-JL-77)
【分类号】：R783

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