外在色素沉着对硅橡胶尺寸稳定性、硬度、细节再现及颜色的影响
Effect of Extrinsic Pigmentation on Dimensional Stability, Hardness, Detail Reproduction, and Color of a Silicone.
作者信息
Goiato Júlio César Vieira, Lopes Victória Tiyemi, de Moraes Melo Neto Clóvis Lamartine, de Magalhães Bertoz André Pinheiro, Dos Santos Daniela Micheline, Bento Victor Augusto Alves, Goiato Marcelo Coelho
机构信息
Department of Biomedicine, Unisalesiano, Araçatuba, São Paulo, Brazil.
Department of Dental Materials and Prosthodontics, São Paulo State University, School of Dentistry, Araçatuba, São Paulo, Brazil.
出版信息
Eur J Dent. 2023 Jul;17(3):735-739. doi: 10.1055/s-0042-1753458. Epub 2022 Sep 26.
OBJECTIVE
The aim of the study is to evaluate the effect of extrinsic pigmentation on the dimensional stability, hardness, detail reproduction, and color of a silicone after thermocycling.
MATERIALS AND METHODS
Sixty samples of MDX4-4210 silicone (Dow Corning Corporation Medical Products) with intrinsic pink pigment (H-109-P, Factor II) and intrinsic opacifier (TiO) were fabricated. Two groups were created: Group 1-only intrinsic pigmentation (H-109P, Factor II + TiO) (Control); and Group 2-intrinsic (H-109P, Factor II + TiO) and extrinsic (Tan FE - 215, Factor II) pigmentation. The following tests were performed for each group: dimensional stability, Shore A hardness, detail reproduction, and color. Readings for the tests were taken before and after thermocycling (2,000 cycles). For dimensional stability and hardness, two-way analysis of variance (ANOVA) was used. One-way ANOVA was used for the color test. In case of significant statistical difference, the Tukey test was applied ( <0.05). All samples achieved the same detail reproduction score, therefore, no statistical evaluation was performed.
RESULTS
For the dimensional stability test, comparing the initial time with the final time, there was a significant contraction in both groups after thermocycling. For the hardness test, comparing the time points, only group 1 showed a significant reduction in hardness after thermocycling. Groups 1 and 2 scored 2 for the detail reproduction test, before and after thermocycling. Comparing group 1 with group 2, there was no significant difference for color change.
CONCLUSION
Based on the tests performed, extrinsic pigmentation did not show a negative effect on silicone, and therefore it can be indicated. The results of the dimensional, hardness, detail reproduction and color evaluations of the MDX4-4210 silicone were clinically acceptable in all cases in the groups with and without extrinsic pigmentation.
目的
本研究旨在评估热循环后外部色素沉着对硅橡胶尺寸稳定性、硬度、细节再现性和颜色的影响。
材料与方法
制备了60个含有固有粉色色素（H-109-P，因子II）和固有遮光剂（TiO）的MDX4-4210硅橡胶（道康宁公司医疗产品）样品。分为两组：第1组——仅固有色素沉着（H-109P，因子II + TiO）（对照组）；第2组——固有（H-109P，因子II + TiO）和外部（Tan FE - 215，因子II）色素沉着。对每组进行以下测试：尺寸稳定性、肖氏A硬度、细节再现性和颜色。在热循环（2000次循环）前后进行测试读数。对于尺寸稳定性和硬度，采用双向方差分析（ANOVA）。颜色测试采用单向ANOVA。若存在显著统计学差异，则应用Tukey检验（<0.05）。所有样品的细节再现得分相同，因此未进行统计学评估。
结果
对于尺寸稳定性测试，将初始时间与最终时间进行比较，热循环后两组均出现显著收缩。对于硬度测试，比较各时间点，仅第1组在热循环后硬度显著降低。第1组和第2组在热循环前后的细节再现测试中均得2分。比较第1组和第2组，颜色变化无显著差异。
结论
基于所进行的测试，外部色素沉着对硅橡胶未显示出负面影响，因此可以使用。在有和没有外部色素沉着的组中，MDX4-4210硅橡胶的尺寸、硬度、细节再现性和颜色评估结果在所有情况下在临床上都是可接受的。
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