Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2023 Aug 20;13(16):2379.
doi: 10.3390/nano13162379.

Hybrid Chitosan-TiO2 Nanocomposite Impregnated in Type A-2186 Maxillofacial Silicone Subjected to Different Accelerated Aging Conditions: An Evaluation of Color Stability

Faten K Al-Kadi  1 , Jwan F Abdulkareem  1 , Bruska A Azhdar  2
Affiliations

Hybrid Chitosan-TiO2 Nanocomposite Impregnated in Type A-2186 Maxillofacial Silicone Subjected to Different Accelerated Aging Conditions: An Evaluation of Color Stability

Faten K Al-Kadi et al. Nanomaterials (Basel). .

Abstract

This study explores the impact of the incorporation of a chitosan-TiO2 nanocomposite on the color stability of pigmented room-temperature vulcanization maxillofacial silicone under various accelerated aging conditions. Five hundred disk-shaped specimens were formed with type A-2186 silicone elastomer, and they were distributed into groups based on pigment types and nanoparticle treatments. The color difference (ΔE) was assessed using a colorimeter in the CIELAB color system before and after exposure to aging conditions, including UV-accelerated aging and outdoor weathering. ANOVA, Dennett's T3, and Tukey HSD tests revealed significant color alterations across all silicone types, with the most pronounced being in the red-colored 3% chitosan specimens and the least pronounced being in the 2% TiO2 specimens that underwent UV-accelerated aging. Outdoor weathering consistently increased the ΔE values across all categories. This study suggests that while nanoparticles may offer some resistance against accelerated aging, they fall short in adequately defending against UV radiation during outdoor weathering.

Keywords: accelerated aging conditions; color stability; core–shell method; room-temperature vulcanization (RTV) of maxillofacial silicone; synthesized chitosan–TiO2 nanocomposite.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Study design.
Figure 2
Figure 2
CIELAB color system [5].
Figure 3
Figure 3
SEM of the synthesized chitosan-TiO2 nanocomposite.
Figure 4
Figure 4
X-ray diffraction: (a) XRD of TiO2; (b) XRD of chitosan (c) XRD of chitosan-TiO2.
Figure 5
Figure 5
Fourier-transform infrared spectroscopy (FTIR); (a) FTIR of chitosan, (b) FTIR of TiO2, (c) FTIR of synthesized chitosan-TiO2 nanocomposite, (d) FTIR of chitosan, TiO2, and chitosan-TiO2.
Figure 6
Figure 6
EDX spectra for nanocomposite chitosan-TiO2.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

References

    1. Rangel Goulart D., Sigua-Rodriguez E.A., Alvarez-Pinzón N., Rocha Fernandes A.Ú., Queiroz E. Quality of life of patients with facial prosthesis. Rev. Fac. Odontol. 2017;29:131–147. doi: 10.17533/udea.rfo.v29n1a7. - DOI
    1. Montgomery P.C., Kiat-Amnuay S. Survey of currently used materials for fabrication of extraoral maxillofacial prostheses in North America, Europe, Asia, and Australia. J. Prosthodont. 2010;19:482–490. doi: 10.1111/j.1532-849X.2009.00538.x. - DOI - PubMed
    1. Lai J.H., Hodges J.S. Effects of processing parameters on physical properties of the silicone maxillofacial prosthetic materials. Dent. Mater. 1999;15:450–455. doi: 10.1016/S0109-5641(99)00074-3. - DOI - PubMed
    1. Kotra R., Malhotra P., Yadav B., Bhardwaj H., Yadav T. Color in Maxillofacial Prosthetics. Indian J. Health Sci. Care. 2016;3:72–77. doi: 10.5958/2394-2800.2016.00014.6. - DOI
    1. Eleni P.N., Krokida M.K., Polyzois G.L., Bisharat G.I. Color stability of facial silicon prosthetic elastomer after artificial weathering. Dent. Res. J. 2008;5:71–79.

LinkOut - more resources