Water sorption and water-induced molecular mobility in dental composite resins

Lagouvardos, PE; Pissis, P; Kyritsis, A; Daoukaki, D

dc.contributor.author	Lagouvardos, PE	en
dc.contributor.author	Pissis, P	en
dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Daoukaki, D	en
dc.date.accessioned	2014-03-01T01:19:41Z
dc.date.available	2014-03-01T01:19:41Z
dc.date.issued	2003	en
dc.identifier.issn	0957-4530	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15667
dc.subject	Composite Resin	en
dc.subject	Dental Material	en
dc.subject	Dielectric Relaxation	en
dc.subject	Diffusion Coefficient	en
dc.subject	Resin Composite	en
dc.subject	Sorption Isotherm	en
dc.subject	Water Uptake	en
dc.subject.classification	Engineering, Biomedical	en
dc.subject.classification	Materials Science, Biomaterials	en
dc.subject.other	Diffusion in liquids	en
dc.subject.other	Hydration	en
dc.subject.other	Resins	en
dc.subject.other	Sorption	en
dc.subject.other	Dynamic sorption (DS)	en
dc.subject.other	Composite materials	en
dc.subject.other	biomedical and dental materials	en
dc.subject.other	compomer	en
dc.subject.other	resin	en
dc.subject.other	water	en
dc.subject.other	article	en
dc.subject.other	depolarization	en
dc.subject.other	desorption	en
dc.subject.other	diffusion coefficient	en
dc.subject.other	equilibrium constant	en
dc.subject.other	hydration	en
dc.subject.other	hydrophilicity	en
dc.subject.other	hysteresis	en
dc.subject.other	isotherm	en
dc.subject.other	measurement	en
dc.subject.other	molecular dynamics	en
dc.subject.other	priority journal	en
dc.subject.other	spectroscopy	en
dc.subject.other	water absorption	en
dc.subject.other	water flow	en
dc.subject.other	water transport	en
dc.title	Water sorption and water-induced molecular mobility in dental composite resins	en
heal.type	journalArticle	en
heal.identifier.primary	10.1023/A:1025080103857	en
heal.identifier.secondary	http://dx.doi.org/10.1023/A:1025080103857	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	Water sorption in two resin composites, Kulzer's Solitaire (S) and SDI's Wave (W), and in a polyacid-modified composite resin, 3M's F2000 (compomer F), was investigated by means of equilibrium sorption isotherms (ESI) and of dynamic sorption (DS) measurements. Molecular mobility in these materials was studied by means of dielectric relaxation spectroscopy (DRS) and of thermally stimulated depolarization currents (TSDC) measurements. The results of ESI measurements show that at equilibrium, water is molecularly distributed in the materials and the effects of hydrophilic sites and clustering are negligible. Hysteresis effects in sorption-desorption cycles are larger in the resin composites than in the compomer. Equilibrium water uptakes in both ESI and DS conditions are rather low, in the range 1-2%. Diffusion coefficients of water are about 1 × 10-8 cm2/s in the resin composites and by a factor of about 2 smaller in the compomer. Molecular mobility increases with hydration, as suggested by preliminary DRS and TSDC measurements. Detailed dielectric measurements may give important information for understanding, at the molecular level, water-induced degradation in dental materials. © 2003 Kluwer Academic Publishers.	en
heal.publisher	KLUWER ACADEMIC PUBL	en
heal.journalName	Journal of Materials Science: Materials in Medicine	en
dc.identifier.doi	10.1023/A:1025080103857	en
dc.identifier.isi	ISI:000184619400004	en
dc.identifier.volume	14	en
dc.identifier.issue	9	en
dc.identifier.spage	753	en
dc.identifier.epage	759	en