目的:为了评估牙齿阴影的影响,树脂复合材料的类型和空腔配置对单阴影和组阴影树脂复合材料的颜色调节。
方法:在具有不同阴影的人造丙烯酸下颌右磨牙中制备I类和V类腔-A1,A2,A3,A3.5和A4。三个单阴影(OMN,UNI,CHA)和两组灯罩(FIL,对HAR)树脂复合材料进行了评价。七十五名观察员,包括牙医,牙科学生和外行人(n=25),参与研究。基于视觉评估的每个牙齿和每个修复之间的颜色匹配的心理物理实验从0(优秀匹配)到4(巨大的不匹配),并计算平均频率(%)。复合材料和牙色之间的视觉颜色差异有统计学意义(P<0.05)。
结果:结果显示,与I类修复相比,V类无法接受的颜色不匹配百分比最高,特别是更多的彩色牙齿色调(A3.5和A4)。外行人组的可接受性评分百分比较高。对于V类,OMN仅在牙齿阴影A1,A2,A3和A4方面与UNI存在显着差异。然而,对于I类,对于A1,A2和A4,OMN与CHA存在显着差异,对于A1,OMN与HAR和FIL存在显着差异。
结论:I类树脂复合修复体表现出比V类更好的颜色匹配,具有更亮和低色度的牙齿色调,显示更好的颜色调整。对于单阴影和组阴影树脂复合材料,两种腔体配置的颜色匹配均相当。
结论:腔结构和牙齿色调可能会影响单色调和组色调树脂复合材料的颜色匹配。这项研究表明,对于单和组阴影树脂复合材料,I类配置的颜色匹配优于V类。此外,放置在具有较浅色调的牙齿中的修复体显示出更有利的颜色调整。
OBJECTIVE: To evaluate the influence of the tooth shade, type of resin composite and cavity configuration on the color adjustment of single-shade and group shade resin composites.
METHODS: Class I and V cavities were prepared in artificial acrylic mandibular right molars with different shades - A1, A2, A3, A3.5 and A4. Three single-shade (OMN, UNI, CHA) and two group shade (FIL, HAR) resin composites were evaluated. Seventy-five observers, including dentists, dental students and laypersons (n = 25), participated in the study. A psychophysical experiment based on visual assessments of the color matching between each tooth and each restoration was ranked from 0 (excellent match) to 4 (huge mismatch), and mean frequencies (%) were calculated. Visual color differences among composite materials and tooth shades were statistically tested (P < 0.05).
RESULTS: The results showed highest percentages of unacceptable color mismatches for class V compared to class I restorations, especially for more chromatic tooth shades (A3.5 and A4). The percentage of ratings of acceptability was higher for laypersons group. For class V, OMN presented significant difference only from UNI in tooth shades A1, A2, A3 and A4. However, for class I, OMN presented significant differences with CHA for A1, A2 and A4, and with HAR and FIL for A1.
CONCLUSIONS: Class I resin composite restorations exhibit superior color matching than Class V, with lighter and low chroma tooth shades demonstrating better color adjustment. The color matching of both cavity configurations is comparable for single and group shade resin composites.
CONCLUSIONS: Cavity configuration and tooth shade may impact color matching of single and group shade resin composites. This study demonstrates superior color matching in class I configurations over class V for both single and group shade resin composites. Additionally, restorations placed in teeth with lighter shades exhibit more favorable color adjustment.