title: Hardness Changes of Tissue Conditioners in Various Storage Media: An in Vitro Study.
abstract: The aim of the present study was to evaluate the effects of storage media on the longitudinal hardness changes of tissue conditioning materials. Four tissue-conditioning materials were used for fabrication of 80 disc-shaped specimens and divided in four groups, stored in four storage media. The specimens underwent artificial ageing corresponding to 30 nights of extra-oral storage. Hardness measurements were obtained at nine intervals between 8 and 240 hours after specimen fabrication. To test the effects of storage media on hardness we employed multivariate modelling (Bonferroni correction; α = 0.05). The materials exhibited varying hardness changes, most pronounced when stored in ambient air.
authors.forename: Athanasios
authors.initials: A
authors.lastname: Ntounis
authors.forename: Phophi
authors.initials: P
authors.lastname: Kamposiora
authors.forename: George
authors.initials: G
authors.lastname: Papavasiliou
authors.forename: Kimon
authors.initials: K
authors.lastname: Divaris
authors.forename: Spiros
authors.initials: S
authors.lastname: Zinelis
mesh_terms: D000180:Acrylic Resins; D000388:Air; D001672:Biocompatible Materials / Q000737:chemistry; D003820:Denture Cleansers / Q000737:chemistry*; D003822:Denture Liners; D020724:Elastomers / Q000737:chemistry; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D008768:Methylmethacrylates / Q000737:chemistry; D010795:Phthalic Acids; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014016:Tissue Conditioning, Dental; D014867:Water / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D001672:Biocompatible Materials; D003820:Denture Cleansers; D020724:Elastomers; D008768:Methylmethacrylates; D010795:Phthalic Acids; C540407:corega tabs; D014867:Water; C043685:Coe Comfort; C009931:poly(ethylmethacrylate)