四种全瓷材料单层及双层结构颜色再现的差异性比较

发布时间：2018-06-13 11:44

本文选题：牙科全瓷 + 单层结构　；参考：《广西医科大学》2014年硕士论文

【摘要】：目的对四种全瓷材料两种结构设计与制作的片状试件以及全冠修复体的颜色再现的差异性进行比较，为临床上合理进行全瓷冠修复设计以及全瓷材料的选择提供参考依据。方法一、实验室部分：实验分组：利用四种全瓷材料，爱尔创ST氧化锆（Upcera组）、CerconHT氧化锆（Cercon组）、Vita In-ceram YZ氧化锆（Vita组）、IPS E.maxPress（IPS组）制作直径为10mm的方形片状试件，，每组全瓷材料试件又分为单层结构（M组）和双层结构（B组）两组。单层试件：只用单一全瓷材料通过CAD/CAM切削或热压铸直接形成1.60mm±0.02厚的氧化锆或铸瓷试件。双层试件：由氧化锆或铸瓷基底及烧结于基底表面的饰瓷两种全瓷材料制作而成。氧化锆试件为0.50mm氧化锆+1.10mm饰瓷；铸瓷试件为0.80mm铸瓷+0.80mm饰瓷（厚度误差控制在±0.02mm）。对以上试件进行CIE1976L*、a*、b*色度值及透射率的测量并比较分析。二、临床部分：在临床上筛选患者，分别常规备牙取模比色，在牙科技术加工中心制作四种不同全瓷材料的单层结构（全锆冠/全铸瓷冠）及双层结构（氧化锆/铸瓷内冠+饰瓷）的全冠，试戴合适后，对所有全冠进行CIE1976L*、a*、b*色度值的测量，并由10名经过比色训练的医生及技师进行目测评估，比较修复体的临床接受度。结果一、实验室部分：色度值同组材料单双层结构间比较结果表明Upcera组单双层试件色差为2.85，色差可接受；Cercon-M组偏红黄色相；铸瓷单层试件L*较大，a*、b*较小；Vita氧化锆单层试件与双层试件相比，L*值较小，a*值过大，偏红。色度值不同组材料间比较结果表明IPS-M组的L*、a*、b*最小，Cercon-M组a*、b*较大，偏红黄，Vita-M组a*值较大，b*较小，偏红蓝。透明度同组材料单双层结构间比较结果表明Cercon和Upcera两组高透明的氧化锆单层与双层试件的透明度差异没有统计学意义，IPS组和Vita组单层与双层试件的CR值差异有统计学意义。透明度不同组材料间对比结果表明IPS单层试件透明度最高，Vita单层试件透明度最低。二、临床部分：色度值结果表明：8组冠的L*间的差异没有统计学意义； IPS组的a*、b*值与氧化锆组的差异有统计学意义，a*、b*值偏小。全瓷材料的结构对L*、a*、b*值均没有影响;全瓷材料的种类对a*、b*值有显著影响(P＜0.001);全瓷材料的种类和结构的交互作用对a*值有影响(P=0.040)。目测评价结果表明：Vita-M组与Cercon-M组临床接受度最低，评分均大于3.5，临床上不被接受；其他6组临床接受度较高，临床上均可接受。全瓷材料的结构和种类对目测评分均有显著性影响，且存在交互作用。结论在本实验条件下，研究表明：利用双层结构进行全冠修复设计时，四种全瓷材料的颜色再现能力及临床接受程度相同；利用单层结构进行全冠修复设计时，推荐使用透明度高的全瓷材料。
[Abstract]:Objective to compare the differences of color reproduction of four kinds of all-ceramic materials designed and made of flake specimens and full crown prostheses. It provides reference for clinical design and selection of all-ceramic materials. Method 1. Laboratory part: four kinds of all ceramic materials were used: the square sheet specimens with diameter of 10mm were made by using four kinds of all ceramic materials, the CerconHT zirconia / Cercon group (Vita In-ceram YZ zirconia Vita group) and the IPS E. maxsl IPS group. Each group was divided into two groups: monolayer structure group (M) and double layer structure group (group B). Monolayer specimen: 1.60mm 卤0.02 thickness zirconia or cast porcelain specimen is directly formed by cutting or hot die-casting with single all-ceramic material by CAD / CAM. Double-layer specimen: made of zirconia or cast porcelain substrate and ceramic ornaments sintered on the substrate surface. The zirconia sample is 0.50mm zirconia 1.10mm decoration porcelain, and the cast porcelain sample is 0.80mm cast porcelain 0.80mm decoration porcelain (thickness error is controlled at 卤0.02 mm). The colorimetric values and transmittance of CIE1976LX / B * were measured and compared with each other. Second, clinical part: in clinical screening patients, respectively, routine tooth preparation model colorimetry, Four monolayer (total zirconium / cast porcelain crowns) and double layer (zirconia / cast porcelain inner crown) crowns of four different all-ceramic materials were made at the dental technical processing center. After fitting, all crowns were measured by CIE1976L / C / B * chroma. Ten doctors and technicians trained in colorimetry were evaluated visually to compare the clinical acceptance of the prosthesis. The results showed that the chromaticity value of the single and double layers of the Upcera group was 2.85, and the color difference was acceptable in the Cercon-M group, while the single layer sample of cast porcelain was smaller than that of the single layer of the cast porcelain, and the results were as follows: (1) in the laboratory, the chromaticity value of the single layer sample was 2.85, and the color difference was acceptable for the group Cercon-M, while the single layer sample of cast porcelain was smaller. Vita zirconia monolayer specimen has a lower L* value than the double layer specimen, which is too large and red. The results of comparison among the different groups of color values showed that the minimum Cercon-M group in IPS-M group was larger than that in the other two groups, while the red yellow Vita-M group had a larger a * value and a little red blue value in IPS-M group. The results showed that there was no significant difference in transparency between Cercon and Upcera high transparent zirconia monolayers and bilayers. The CR values of IPS and Vita monolayers were significantly different from those of double layers. The results showed that the transparency of IPS monolayer specimen was the highest and the transparency of Vita monolayer specimen was the lowest. Second, the clinical part: the results of chroma value showed that there was no significant difference between the crown L * of the two groups, but the difference between the IPS group and the zirconia group was small. The results showed that there was no significant difference in the color value between the two groups, but the difference between the IPS group and the zirconia group was smaller than that in the control group. The structure of all-ceramic material had no effect on the value of LP0.040 ~ *, the type of all-ceramic material had a significant effect on the value of ~ (1) (P < 0.001), and the interaction between the type and structure of all-ceramic material had an effect on the value of a ~ * (P _ (0.040). The results of visual evaluation showed that the clinical acceptance of the two groups was the lowest, the scores were higher than 3.5, and the other 6 groups had higher clinical acceptance and could be accepted clinically. The structure and type of all-ceramic materials have a significant effect on visual test score, and there is an interaction between them. Conclusion under the condition of this experiment, the results show that the color reproduction ability and clinical acceptance of the four kinds of all-ceramic materials are the same when the double-layer structure is used for the crown restoration design. All-ceramic materials with high transparency are recommended when using monolayer structure for crown restoration design.
【学位授予单位】：广西医科大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783.1

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