Evaluation of varying concentrations of nano-oxides as ultraviolet protective agents when incorporated in maxillofacial silicones: An in vitro study

Bangera, Blessy Susan; Guttal, Satyabodh S

doi:10.1016/j.prosdent.2014.07.001

Cited by 18 publications

(22 citation statements)

References 13 publications

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“…One of these methods is addition of nanoparticles, which are opacifiers such as zinc oxide (ZnO), barium sulfate (BaSO 4 ), and titanium dioxide (TiO 2 ). 3 They are used in the manufacture of sunscreens to protect human skin against UV rays because they have a high refractive index. 14,15 As the nanoparticles are smaller than the UV light wavelength, their electrons vibrate when they hit by such radiation, thereby dissipating one portion of the light while absorbing another.…”

mentioning

confidence: 99%

“…16 Several studies have confirmed the effectiveness of nanoparticles in protecting silicone against color deterioration, since nanoparticles block the ultraviolet rays and so increase its durability. 3,5,6,[16][17][18][19][20][21][22] However, to increase material durability, other important properties should also be evaluated. 23,24 The hardness of silicone determines its flexibility and enables the prosthesis to mimic the skin texture as closely as possible, promoting greater comfort for the patient.…”

mentioning

confidence: 99%

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Influence of adding nanoparticles on the hardness, tear strength, and permanent deformation of facial silicone subjected to accelerated aging

Nóbrega

Andreotti

Moreno

et al. 2016

The Journal of Prosthetic Dentistry

127

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mentioning

confidence: 99%

mentioning

confidence: 99%

Influence of adding nanoparticles on the hardness, tear strength, and permanent deformation of facial silicone subjected to accelerated aging

Nóbrega

Andreotti

Moreno

et al. 2016

The Journal of Prosthetic Dentistry

127

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“…They are characterized by their minute particle size, large specific area, active function, and strong interfacial interaction with the organic polymer. Therefore upon addition to silicone matrix it provide resistance to environmental stress cracking and aging, and also improve the physical and mechanical properties of the organic polymer (34,35). Titanium dioxide NPs are widely used as inorganic UV absorbers in nanotechnology applications.…”

Section: Discussionmentioning

confidence: 99%

Effect of Extraoral Aging Conditions on Mechanical Properties of Facial Silicone Elastomer Reinforced With Titanium-Oxide Nanoparticles (In Vitro Study)

Radey

Shimy

Ahmed

2020

Alexandria Dental Journal

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INTRODUCTION: Investigators have been searching for ideal maxillofacial prosthetic materials in order to gain patient acceptance and can be fabricated easily in the dental setting. OBJECTIVES: To evaluate the influence of adding different concentrations of titanium oxide nanoparticles (TiO2 NPs) on the mechanical properties of facial silicone elastomer (SE) after different extra-oral aging methods. MATERIALS AND METHODS: TiO2 nanoparticles were mixed with MED-4210 maxillofacial silicone elastomer at 1.5 %, 2% and 2.5 % weight percentage (w/w). Unmodified silicone was served as control group. Each of the above groups were evaluated to mechanical properties before aging conditions. Control & 2.5% nano-TiO2 silicone elastomers groups were subjected to six equal aging conditions groups as follow. Dry storage in dark for 6 months, storage in simulated sebum solution for 6 months, storage in simulated acidic perspiration for 6 months, accelerated artificial daylight weathering for 360 hours, storage in antimicrobial silicone-cleaning solution for 30 hours and mixed aging of sebum under UV light for 360 hours. After aging exposures, they were evaluated to the mechanical properties. Data were analyzed using the Kolmogorov-Smirnov test, F-test (ANOVA) and Post-hoc pair-wise test. RESULTS: TiO2 nanoparticles addition improved the mechanical properties in terms of tensile strength and percentage elongation, tear strength and shore A hardness of MED-4210 maxillofacial silicon elastomer before and after extra-oral aging conditions (P < 0.05). Pair-wise comparison between control group and 2.5% nano-TiO2 silicone elastomers composite exhibited significant differences according to the mechanical properties after aging. CONCLUSIONS: Reinforcement of MED-4210 maxillofacial silicon elastomer with TiO2 nanoparticles introduces a favorable material with physical and anti-ageing properties in our in vitro study.

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“…15 Current research is more focused in improving the longevity and reducing the discolouration of silicones. Akash et al suggest that incorporation of nano-oxides improved the color stability of silicone elastomer and also acted as an opacifier.…”

Section: Cosmesilmentioning

confidence: 99%

Maxillofacial Prosthetic Materials -An Update

Deepthi¹

2014

JIMD

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Abstract:Body abnormalities or defects that compromise appearance, function may make an individual, incapable of leading a relatively normal life. Facial disfigurement can be the result of a congenital anomaly, trauma or tumour surgery. Surgical reconstruction may not be possible owing to size or location of the defect. The patient's medical condition or personal desires may also preclude reconstructive surgery. In such cases, prosthetic rehabilitation is indicated. A facial prosthesis restores normal anatomy and appearance, protects the tissues of a defect, and provides great psychological benefits to the patient. A number of materials are available and have been used for fabrication of maxillofacial prosthesis; the aim of this article is to provide some insight about the currently used maxillofacial prosthetic materials.

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Evaluation of varying concentrations of nano-oxides as ultraviolet protective agents when incorporated in maxillofacial silicones: An in vitro study

Cited by 18 publications

References 13 publications

Influence of adding nanoparticles on the hardness, tear strength, and permanent deformation of facial silicone subjected to accelerated aging

Influence of adding nanoparticles on the hardness, tear strength, and permanent deformation of facial silicone subjected to accelerated aging

Effect of Extraoral Aging Conditions on Mechanical Properties of Facial Silicone Elastomer Reinforced With Titanium-Oxide Nanoparticles (In Vitro Study)

Maxillofacial Prosthetic Materials -An Update

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