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Ultraviolet C as a method of disinfecting medical silicone used in facial prostheses: An in vitro study
The Journal of Prosthetic Dentistry ( IF 4.6 ) Pub Date : 2021-07-20 , DOI: 10.1016/j.prosdent.2021.06.036
Gabriela Malateaux 1 , Rodrigo Salazar-Gamarra 1 , Jefferson de Souza Silva 2 , Vanessa Gallego Arias Pecorari 3 , Ivana Barbosa Suffredini 4 , Luciano Lauria Dib 4
Affiliation  

Statement of problem

Hygiene and disinfection are important factors for preserving facial prostheses and supporting tissue health. However, a method that does not accelerate degradation or color change is necessary.

Purpose

The purpose of this in vitro study was to evaluate the effectiveness of irradiation with ultraviolet C light-emitting diode (UV-C LED) light in the disinfection and initial color stability of the silicone (A-588-1; Factor II) used in facial prostheses.

Material and methods

One hundred and twenty specimens were made, contaminated by multispecies biofilm, and divided into 5 groups (n=24) with different treatments: control, distilled water, 0.12% chlorhexidine, UV-C LED light, and dimethyl sulfoxide (DMSO) as the negative control. Cell viability was measured by the methyl tetrazolium salt method. Statistical analysis was performed by generalized linear models. Additional descriptive analysis was performed for color analysis by using 16 silicone specimens made with light and dark intrinsic coloring in 4 groups (controls and treatments n=4) submitted to UV-C LED light. The ΔE of the specimens was obtained by CIEDE200.

Results

The results of cell viability demonstrated a statistically significant difference among the groups (P<.001), with a microbial reduction after UVC-LED exposure compared with the control group. Regarding the color, the groups presented an average ΔE (light 0.205 and dark 0.308) compatible with visually imperceptible changes (light <0.7 and dark <1.2).

Conclusions

Irradiation with UV-C LED light decreased the in vitro microbial cell viability of the medical silicone used in facial prostheses, demonstrating initial color stability.



中文翻译:

紫外线 C 作为一种消毒用于面部假体的医用硅胶的方法:一项体外研究

问题陈述

卫生和消毒是保护面部假体和支持组织健康的重要因素。然而,不加速降解或颜色变化的方法是必要的。

目的

这项体外研究的目的是评估紫外线 C 发光二极管 (UV-C LED) 光照射对用于消毒的有机硅(A-588-1;因子 II)的消毒和初始颜色稳定性的有效性。面部假肢。

材料与方法

制作了 120 个样本,被多物种生物膜污染,并分为 5 组(n=24),分别进行不同处理:对照、蒸馏水、0.12% 洗必泰、UV-C LED 灯和二甲基亚砜(DMSO)作为处理阴性对照。通过甲基四唑盐法测量细胞活力。通过广义线性模型进行统计分析。通过使用在 UV-C LED 灯下的 4 组(对照组和处理组 n = 4)中的 16 个由浅色和深色本征着色制成的有机硅样品,对颜色分析进行了额外的描述性分析。试样的 ΔE 由 CIEDE200 获得。

结果

细胞活力的结果表明各组之间存在统计学显着差异 ( P <.001),与对照组相比,UVC-LED 暴露后微生物减少。关于颜色,各组的平均 ΔE(浅 0.205 和深 0.308)与视觉上难以察觉的变化(浅 <0.7 和深 <1.2)兼容。

结论

用 UV-C LED 光照射会降低用于面部假体的医用硅胶的体外微生物细胞活力,显示出初始颜色稳定性。

更新日期:2021-09-03
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