Optical properties of pigmented polydimethylsiloxane prosthetic elastomers: Effect of ""outdoor"" and ""indoor"" accelerating aging

Polyzois, GL; Eleni, PN; Krokida, MK

dc.contributor.author	Polyzois, GL	en
dc.contributor.author	Eleni, PN	en
dc.contributor.author	Krokida, MK	en
dc.date.accessioned	2014-03-01T02:03:04Z
dc.date.available	2014-03-01T02:03:04Z
dc.date.issued	2011	en
dc.identifier.issn	10492275	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29346
dc.subject	Accelerated aging	en
dc.subject	Color changes	en
dc.subject	Optical properties	en
dc.subject	Time passage	en
dc.subject	Translucency parameter	en
dc.subject.other	dimeticone	en
dc.subject.other	episil	en
dc.subject.other	Mollomed	en
dc.subject.other	silastic	en
dc.subject.other	silicone derivative	en
dc.subject.other	analysis of variance	en
dc.subject.other	article	en
dc.subject.other	chemistry	en
dc.subject.other	colorimetry	en
dc.subject.other	materials testing	en
dc.subject.other	maxillofacial prosthesis	en
dc.subject.other	optics	en
dc.subject.other	prosthesis	en
dc.subject.other	time	en
dc.subject.other	Analysis of Variance	en
dc.subject.other	Colorimetry	en
dc.subject.other	Dimethylpolysiloxanes	en
dc.subject.other	Materials Testing	en
dc.subject.other	Maxillofacial Prosthesis	en
dc.subject.other	Optics and Photonics	en
dc.subject.other	Prosthesis Coloring	en
dc.subject.other	Silicone Elastomers	en
dc.subject.other	Silicones	en
dc.subject.other	Time Factors	en
dc.title	Optical properties of pigmented polydimethylsiloxane prosthetic elastomers: Effect of ""outdoor"" and ""indoor"" accelerating aging	en
heal.type	journalArticle	en
heal.identifier.primary	10.1097/SCS.0b013e31822e5ca4	en
heal.identifier.secondary	http://dx.doi.org/10.1097/SCS.0b013e31822e5ca4	en
heal.publicationDate	2011	en
heal.abstract	OBJECTIVES: Optical properties of facial prosthetic elastomers undergo significant changes mainly due to aging. The resulting changes in their appearance are the main reasons of facial prosthesis' replacement. PURPOSE: The purpose of this study was to evaluate changes in the translucency parameter (TP) and color (ΔE) of polydimethylsiloxane (PDMS) maxillofacial elastomers after exposure to 3 different aging conditions (time passage, accelerated ""outdoor"" aging, and accelerated ""indoor"" aging). MATERIALS AND METHODS: The PDMS prosthetic elastomers tested in this study were low- (LTV) and higherature vulcanized (Episil and Mollomed, respectively) in various shades. Color changes (ΔE) and translucency parameter (TP) were determined in the CIE Lab* system using a tristimulus colorimeter. Data were subjected to 2-way analysis of variance followed by Tukey post hoc test. In addition, TP values were analyzed by paired t tests. The significance level of α = 0.05 was set for all tests. RESULTS: Translucency parameter values for most samples were significantly changed after aging, and ΔE* values were characterized as unacceptable. Both aging procedure and material type affected the changes that occurred. Moreover, dark-shaded samples of both silicone materials revealed significant changes in TP values before and after aging. ΔE* was not significantly different among the same material samples but had significant differences between the 2 materials (Episil and Mollomed). Time passage did not significantly affect TP values contrary to the other 2 accelerated aging procedures. Between outdoor and indoor aging, no significant differences were detected. CONCLUSIONS: Accelerated outdoor and indoor aging caused significant changes in ΔE* and TP values. Significant changes were also detected between material types. Copyright © 2011 Mutaz B. Habal, MD.	en
heal.journalName	Journal of Craniofacial Surgery	en
dc.identifier.doi	10.1097/SCS.0b013e31822e5ca4	en
dc.identifier.volume	22	en
dc.identifier.issue	5	en
dc.identifier.spage	1574	en
dc.identifier.epage	1578	en