Mechanical behaviour of a poydimethylsiloxane elastomer after outdoor weathering in two different weathering locations

Eleni, Panagiota N.; Krokida, Magdalini; Polyzois, Gregory; Charitidis, Costas A.; Koumoulos, Elias P.; Tsikourkitoudi, Vasiliki; Ziomas, I.

doi:10.1016/j.polymdegradstab.2011.01.017

Cited by 19 publications

(22 citation statements)

References 38 publications

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“…The number of studies without any aging decreased to four from ten, while articles including artificial or natural aging remained the same (8) . That said, studies with outdoor weathering had increased to six from only two …”

Section: Discussionmentioning

confidence: 99%

“…The most recent publications (from 2010 to 2015) according to the inclusion criteria also showed a rise in the number of studies having natural/artificial aging and outdoor weathering effect compared to without aging. In contrast to only two articles published without any aging, six articles with natural/artificial/accelerated aging and five studies after outdoor weathering had been published since 2010 (Fig ) . This rise in published articles incorporating the effect of outdoor weathering and accelerated aging reflects the concern for advancements in silicone properties under weathering or aging effects to enhance the clinical shelf life of prostheses.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Aging and Weathering on the Physical Properties of Maxillofacial Silicone Elastomers: A Systematic Review and Meta‐Analysis

Rahman

Jamayet

Nizami

et al. 2018

Journal of Prosthodontics

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Despite the varying research, it seems that the single "ideal" maxillofacial prosthetic material that can provide sufficient resistance against different aging conditions is yet to be identified. Therefore, it is imperative for standardization organizations, the scientific community, and academia to develop modified prosthetic silicones possessing improved physical properties and color stability, limiting the clinical problems regarding degradation of maxillofacial prostheses.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of Aging and Weathering on the Physical Properties of Maxillofacial Silicone Elastomers: A Systematic Review and Meta‐Analysis

Rahman

Jamayet

Nizami

et al. 2018

Journal of Prosthodontics

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show abstract

“…Many studies have reported these changes after performing accelerated aging exposure 3,6 and solar exposure experiments 4,28 . Moreover, significant changes also occurred due to skin secretions 27 and different disinfection treatments 6- 9, 33 .…”

Section: Introductionmentioning

confidence: 99%

Effect of different disinfecting procedures on the hardness and color stability of two maxillofacial elastomers over time

et al. 2013

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Objective:Disinfection procedures often cause deterioration in a maxillofacial prosthesis. Color and hardness alterations could lead to a replacement of the prosthesis. Material and Methods:An experimental chlorinated polyethylene (CPE) and a commercial polydimethyl siloxane (PDMS) sample were treated with four different disinfection procedures for a period which simulates 1 year of clinical service. The applied disinfection procedures included microwave exposure and immersion in three solutions, sodium hypochlorite, neutral soap and a commercial disinfecting soap. Shore A hardness (ΔΗ) and color differences (ΔΕ) were determined before and after each procedure. All data were analyzed by Two Way Analysis of Variance (ANOVA) and Tukey's post hoc tests at a level of α=0.05. Results:The samples presented significant alterations in color and hardness after the different disinfection treatments. The color differences (ΔΕ) were at least eye detectable in all cases and clinically unacceptable in most of the cases, with values ranging from 1.51 to 4.15 and from 1.54 to 5.92 for the PDMS and CPE material, respectively. Hardness was decreased after all the disinfection procedures in the PDMS, while for the CPE, a decrement was observed after disinfection with sodium hypochlorite and neutral soap and an increment after microwave exposure and the disinfection with a commercial antimicrobial agent. The PDMS samples presented greater alterations in color and hardness after disinfection with sodium hypochlorite solution, while the microwave exposure caused negligible effects. The CPE samples were affected most after disinfection when treated with neutral soap, and more slightly when disinfected with sodium hypochlorite solution. Conclusions:The disinfection procedures caused alterations in color and hardness of the examined materials. The most suitable disinfection procedure for the PDMS material is microwave exposure, while disinfection with sodium hypochlorite solution is not recommended. The CPE material is suggested to be disinfected with sodium hypochlorite solution and the use of neutral soap is not recommended. Comparing the two materials, the PDMS material is most color stable, while the CPE material presented fewer changes in hardness.

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“…Significant changes occurred in the mechanical and thermal properties of different maxillofacial materials, including Elastomer 42, TechSil, M511, and CPE, because of outdoor weathering . Furthermore, new information about maxillofacial prosthetics serviceability were obtained from a nano‐indentation test, where Elastomer 42 became harder with observed differences in the mechanical behavior because of the photodegradation and hydrolysis that occur during weathering . Hardness of two silicone elastomers was affected under simulated weathering in tropical climatic conditions.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties and Simulated Aging of Silicone Maxillofacial Elastomers: Advancements in the Past 45 Years

Hatamleh

Polyzois

Nuseir

et al. 2016

Journal of Prosthodontics

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It is imperative to overcome the existing variability by establishing unified national or international standards/specifications for maxillofacial prosthetic materials. Standardization organizations or bodies, the scientific community, and academia need to be coordinated to achieve this goal. In the meantime and despite all of these theoretically significant alternatives, clinical practice still faces problems with serviceability of maxillofacial prostheses.

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Mechanical behaviour of a poydimethylsiloxane elastomer after outdoor weathering in two different weathering locations

Cited by 19 publications

References 38 publications

Effect of Aging and Weathering on the Physical Properties of Maxillofacial Silicone Elastomers: A Systematic Review and Meta‐Analysis

Effect of Aging and Weathering on the Physical Properties of Maxillofacial Silicone Elastomers: A Systematic Review and Meta‐Analysis

Effect of different disinfecting procedures on the hardness and color stability of two maxillofacial elastomers over time

Mechanical Properties and Simulated Aging of Silicone Maxillofacial Elastomers: Advancements in the Past 45 Years

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