Color Stability, Surface Gloss, Surface Roughness, and Wettability of Material Jetting 3D-Printed Denture Material Under Various Surface Treatments.

IF 2.5 Q2 DENTISTRY, ORAL SURGERY & MEDICINE
Toshiki Nagai, Amal Alfaraj, Wei-Shao Lin
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引用次数: 0

Abstract

Objectives: To examine the effects of surface treatments on the color stability, surface roughness, surface gloss, and wettability of monolithic polychromatic material jetting (MJT) 3D-printed denture material. Material and Methods: Twenty-one color variants of the same denture material (TrueDent; Stratasys, Eden, MN, USA) underwent two surface treatments (polishing only or polishing and glazing), creating 42 study groups with a total of 420 samples (n = 10 per group). The samples were manufactured using a PolyJet 3D printer (J5 DentaJet; Stratasys, Eden, MN, USA), a type of MJT 3D printer. Color measurements were taken with a digital spectrophotometer before and after the surface treatments, and quantitative color differences (ΔE00 and ΔC*) were calculated using the CIE2000 system. Comparisons of ΔE00 were made against the 50%:50% acceptability threshold (AT) of 1.8 and the 50%:50% perceptibility threshold (PT) of 0.8 for tooth shade, as well as the 50%:50% PT of 1.72 and the 50%:50% AT of 4.08 for gingival (pink) shade. After surface treatment, the gloss was measured using a glossmeter, surface roughness was measured with optical profilometry, and wettability was measured by contact angle measurements using an optical tensiometer. The significance of surface treatment on color changes for each color variant was evaluated using one-sided, one-sample t-tests against the AT and PT. The effects of surface treatment on surface gloss, surface roughness, contact angle, and ΔC* were analyzed using t-tests for each color variant. Pairwise comparisons between groups were made using Fisher's Protected Least Significant Differences (α = 0.05). Results: In most cases, glazing caused the color change (ΔE00) to exceed the AT and PT, with a few exceptions. Most materials exhibited a more vibrant (more saturated) appearance and statistically higher chroma, with glazed surface treatments compared to polished ones, though there were some exceptions. For all materials, the glazed samples had significantly higher gloss units than the polished ones (p < 0.0001). Additionally, all materials showed significantly higher surface roughness in glazed samples compared to polished ones (p < 0.0001 for most). The polished samples had significantly higher contact angles (p < 0.0001 for most). Conclusions: Surface treatments significantly influenced the color, surface gloss, surface roughness, and wettability of MJT 3D-printed denture materials. Glazing led to increased chroma and gloss and produced more hydrophilic surfaces, although it also increased surface roughness. These results highlight the importance of surface treatment selection in optimizing the clinical performance of MJT-fabricated dentures.

不同表面处理下3d打印义齿材料的颜色稳定性、表面光泽度、表面粗糙度和润湿性
目的:研究表面处理对整体多色材料喷射(MJT) 3d打印义齿材料的颜色稳定性、表面粗糙度、表面光泽度和润湿性的影响。材料与方法:同一义齿材料(TrueDent;Stratasys, Eden, MN, USA)进行了两种表面处理(仅抛光或抛光和上釉),创建了42个研究组,共有420个样本(每组n = 10)。样品使用PolyJet 3D打印机(J5 DentaJet;Stratasys, Eden, MN, USA),一种MJT 3D打印机。表面处理前后用数字分光光度计测量颜色,用CIE2000系统计算定量色差(ΔE00和ΔC*)。将ΔE00与牙齿阴影的50%:50%可接受阈值(AT)为1.8、50%:50%可感知阈值(PT)为0.8、牙龈(粉红)阴影的50%:50% PT为1.72、50%:50% AT为4.08进行比较。表面处理后,用光泽度仪测量光泽度,用光学轮廓仪测量表面粗糙度,用光学张力仪测量接触角来测量润湿性。采用针对AT和PT的单侧单样本t检验来评估每种颜色变体的表面处理对颜色变化的重要性。使用每种颜色变体的t检验来分析表面处理对表面光泽度、表面粗糙度、接触角和ΔC*的影响。两两比较采用Fisher最小显著保护差异(α = 0.05)。结果:在大多数情况下,上光引起的颜色变化(ΔE00)超过AT和PT,少数例外。大多数材料表现出更有活力(更饱和)的外观和统计上更高的色度,与抛光的表面处理相比,尽管有一些例外。对于所有材料,釉面样品的光泽单位明显高于抛光样品(p < 0.0001)。此外,与抛光样品相比,所有材料在上釉样品中显示出明显更高的表面粗糙度(p < 0.0001)。抛光后的样品接触角明显较高(p < 0.0001)。结论:表面处理对MJT 3d打印义齿材料的颜色、表面光泽度、表面粗糙度和润湿性有显著影响。上光增加了色度和光泽,产生了更亲水的表面,尽管它也增加了表面粗糙度。这些结果突出了表面处理选择对优化mjt义齿临床性能的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Dentistry Journal
Dentistry Journal Dentistry-Dentistry (all)
CiteScore
3.70
自引率
7.70%
发文量
213
审稿时长
11 weeks
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