Mechanical behavior of facial prosthetic elastomers after outdoor weathering

Eleni, PN; Katsavou, I; Krokida, MK; Polyzois, GL; Gettleman, L

dc.contributor.author	Eleni, PN	en
dc.contributor.author	Katsavou, I	en
dc.contributor.author	Krokida, MK	en
dc.contributor.author	Polyzois, GL	en
dc.contributor.author	Gettleman, L	en
dc.date.accessioned	2014-03-01T01:31:04Z
dc.date.available	2014-03-01T01:31:04Z
dc.date.issued	2009	en
dc.identifier.issn	0109-5641	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19732
dc.subject	Chlorinated polyethylene	en
dc.subject	Hardness	en
dc.subject	Natural weathering	en
dc.subject	Polydimethyl siloxane	en
dc.subject	Tensile strength	en
dc.subject.classification	Dentistry, Oral Surgery & Medicine	en
dc.subject.classification	Materials Science, Biomaterials	en
dc.subject.other	Chlorinated polyethylene	en
dc.subject.other	Elasticity parameters	en
dc.subject.other	Hardness test	en
dc.subject.other	Irradiation time	en
dc.subject.other	Maximum stress	en
dc.subject.other	Measured properties	en
dc.subject.other	Mechanical behavior	en
dc.subject.other	Mechanical tests	en
dc.subject.other	Model parameters	en
dc.subject.other	Natural weathering	en
dc.subject.other	Non-linearity parameter	en
dc.subject.other	Outdoor weathering	en
dc.subject.other	Physical weathering	en
dc.subject.other	Stress-strain data	en
dc.subject.other	Tensile tests	en
dc.subject.other	Thessaloniki	en
dc.subject.other	Type testing	en
dc.subject.other	Computer simulation	en
dc.subject.other	Data compression	en
dc.subject.other	Elastomers	en
dc.subject.other	Electric network analysis	en
dc.subject.other	Erosion	en
dc.subject.other	Hardness	en
dc.subject.other	Hardness testing	en
dc.subject.other	Irradiation	en
dc.subject.other	Maxillofacial prostheses	en
dc.subject.other	Mechanical engineering	en
dc.subject.other	Plastics	en
dc.subject.other	Polyethylenes	en
dc.subject.other	Pumps	en
dc.subject.other	Rubber	en
dc.subject.other	Silicones	en
dc.subject.other	Sun	en
dc.subject.other	Tensile strength	en
dc.subject.other	Tensile testing	en
dc.subject.other	Thermoplastics	en
dc.subject.other	Weathering	en
dc.subject.other	Mathematical models	en
dc.subject.other	baysilon	en
dc.subject.other	chlorinated hydrocarbon	en
dc.subject.other	dimeticone	en
dc.subject.other	elastomer	en
dc.subject.other	polyethylene	en
dc.subject.other	rain	en
dc.subject.other	algorithm	en
dc.subject.other	article	en
dc.subject.other	chemical model	en
dc.subject.other	chemistry	en
dc.subject.other	compressive strength	en
dc.subject.other	face	en
dc.subject.other	hardness	en
dc.subject.other	human	en
dc.subject.other	materials testing	en
dc.subject.other	mechanical stress	en
dc.subject.other	mechanics	en
dc.subject.other	prostheses and orthoses	en
dc.subject.other	radiation exposure	en
dc.subject.other	sunlight	en
dc.subject.other	temperature	en
dc.subject.other	tensile strength	en
dc.subject.other	time	en
dc.subject.other	ultraviolet radiation	en
dc.subject.other	Young modulus	en
dc.subject.other	Algorithms	en
dc.subject.other	Compressive Strength	en
dc.subject.other	Dimethylpolysiloxanes	en
dc.subject.other	Elastic Modulus	en
dc.subject.other	Elastomers	en
dc.subject.other	Face	en
dc.subject.other	Hardness	en
dc.subject.other	Humans	en
dc.subject.other	Hydrocarbons, Chlorinated	en
dc.subject.other	Materials Testing	en
dc.subject.other	Mechanics	en
dc.subject.other	Models, Chemical	en
dc.subject.other	Polyethylene	en
dc.subject.other	Prostheses and Implants	en
dc.subject.other	Rain	en
dc.subject.other	Stress, Mechanical	en
dc.subject.other	Sunlight	en
dc.subject.other	Temperature	en
dc.subject.other	Tensile Strength	en
dc.subject.other	Time Factors	en
dc.subject.other	Ultraviolet Rays	en
dc.title	Mechanical behavior of facial prosthetic elastomers after outdoor weathering	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.dental.2009.06.018	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.dental.2009.06.018	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Objectives. The degradation of maxillofacial prosthetic elastomers that occurs during physical weathering is usually responsible for the replacement of prostheses. In this study the mechanical behavior of 4 non-pigmented facial prosthetic elastomers, exposed to outdoor weathering for 1 year, was investigated. The hypothesis investigated was that irradiation time did not affect the properties measured. Methods. The samples were exposed to solar radiation for 1 year in Thessaloniki (Greece). Three different types of polydimethyl siloxane (PDMS) and chlorinated polyethylene (CPE) samples were tested in this study. Mechanical tests (compressive-tensile) were performed using a universal type testing machine. Hardness tests were evaluated using a durometer tester. Simple mathematical models were developed to correlate the measured properties with irradiation time. The stress-strain data of compression and tensile tests were modeled using parameters such as maximum stress (sigma(max)), maximum strain (epsilon(max)), elasticity parameter (E), and non-linearity parameter (p), while the mathematical model used for hardness data involves initial hardness of materials (H-0). Results. Two of the silicone prosthetics (Elastomer 42, TechSil 25) seem to become harder and more brittle contrary to the other silicone (M 511) and chlorinated polyethylene (CPE) samples that become softer and more ductile. Duration of exposure increases these phenomena. Conclusion. The effect of irradiation time on the mechanical behavior was introduced through its effect on the models' parameters. The hypothesis was rejected since changes were observed in the model parameters. (C) 2009 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Dental Materials	en
dc.identifier.doi	10.1016/j.dental.2009.06.018	en
dc.identifier.isi	ISI:000271472400004	en
dc.identifier.volume	25	en
dc.identifier.issue	12	en
dc.identifier.spage	1493	en
dc.identifier.epage	1502	en