Department of Life Sciences, Manchester Metropolitan University, Manchester; Academic Centre of Reconstructive Science, King's College London, London; Maxillofacial Prosthetics Service Department, Poole Hospital, Poole, UK.
J Indian Prosthodont Soc. 2023 Oct-Dec;23(4):363-372. doi: 10.4103/jips.jips_339_23.
The relatively short lifespan of maxillofacial prostheses (ranging from 3-24 months) is mostly a result of colour instability of silicone elastomers caused by ultraviolet (UV) radiation, requiring frequent remakes. An improvement in colour preservation could result in fewer remakes, thus saving time and money for both clinician and patient. In the quest for a suitable colour protection method, sunscreen protection products were considered; the most recent study on this subject was carried out in 1994, albeit using a low protection factor. The aim of this research was to determine if there is value in using topical sun protection products on extraoral silicone prostheses to prevent colour degradation.
This was an in vitro quantitative study.
Three commercially available sunscreen products were studied, Riemann P20, Boots Soltan, and Garnier Ambre Solaire all with a sun protection factor of 50. A total of 144 silicone elastomer samples were produced using a Caucasian (light) shade 1.2 (n = 72) and dark skin shade 3.2 (n = 72) from the Technovent Ltd. Reality Shade range. Each shade group (n = 72) was divided into three groups to be subjected to outdoor weathering (n = 24), indoor (n = 24), and dark storage (n = 24). Within each environmental group, samples were divided into groups of six samples (n = 6) to receive the three sunscreens plus a control group with no sunscreen. The CIEL* a* b* formula was used to obtain the color measurements.
One way ANOVA test and Tukey's HSD test for multiple comparisons was used to analyse the data.
The ΔE values had changed for all samples throughout the aging process.
Soltan showed promising results in protecting the dark-shaded samples in the outdoor environment only.
颌面修复体的寿命相对较短（3-24 个月），主要是由于硅橡胶弹性体的颜色不稳定，这是由紫外线（UV）辐射引起的，需要频繁重新制作。如果能改善颜色的保持性，就可以减少重新制作的次数，从而为临床医生和患者节省时间和金钱。在寻找合适的颜色保护方法时，考虑了防晒霜等防护产品；关于这个主题的最新研究是在 1994 年进行的，尽管使用的是低保护因子。本研究旨在确定在颌面外硅橡胶修复体上使用局部防晒产品是否可以防止颜色降解。
这是一项体外定量研究。
研究了三种市售的防晒霜产品，Riemann P20、Boots Soltan 和 Garnier Ambre Solaire，防护因子均为 50。总共使用来自 Technovent Ltd. 的 Reality Shade 系列的高加索（浅色）1.2 号和深色 3.2 号制作了 144 个硅橡胶弹性体样本。每个颜色组（n = 72）分为三组，分别进行户外风化（n = 24）、室内（n = 24）和黑暗储存（n = 24）。在每个环境组内，将样本分为六组样本（n = 6），分别接受三种防晒霜和无防晒霜的对照组。使用 CIELab*公式获取颜色测量值。
使用单因素方差分析和 Tukey 的 HSD 检验进行多组比较来分析数据。
所有样本在老化过程中ΔE 值都发生了变化。
Soltan 仅在户外环境中对深色样本有较好的保护效果。
