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Article: Effect of Heat Treatment on the Physical Properties of Provisional Crowns during Polymerization: An in Vitro Study

TitleEffect of Heat Treatment on the Physical Properties of Provisional Crowns during Polymerization: An in Vitro Study
Authors
Issue Date2015
Citation
Materials, 2015, v. 8, p. 1766-1777 How to Cite?
AbstractAbstract: This study concerned the effect of heat treatment during setting on the physical properties of four resin-based provisional restorative materials: Duralay (polymethyl methacrylate), Trim II (polyethyl methacrylate), Luxatemp (bis-acrylic composite), and Protemp 4 (bis-acrylic composite). Specimens were prepared at 23, 37, or 60 °C for evaluation of flexural strength, surface roughness, color change and marginal discrepancy. Flexural strength was determined by a three-point bending test. Surface profile was studied using atomic force microscopy. Color change was evaluated by comparing the color of the materials before and after placement in coffee. A travelling microscope helped prepare standardized crowns for assessment of marginal discrepancy. Flexural strength of all tested materials cured at 23 °C or 37 °C did not significantly change. The surface roughness and marginal discrepancy of the materials increased at 60 °C curing temperature. Marginal discrepancies, color stability, and other physical properties of materials cured at 23 °C or 37 °C did not significantly change. Flexural strength of certain provisional materials cured at 60 °C increased, but there was also an increase in surface roughness and marginal discrepancy.
Persistent Identifierhttp://hdl.handle.net/10722/215046

 

DC FieldValueLanguage
dc.contributor.authorMei, L-
dc.contributor.authorSo, SYC-
dc.contributor.authorLi, H-
dc.contributor.authorChu, CH-
dc.date.accessioned2015-08-21T12:20:55Z-
dc.date.available2015-08-21T12:20:55Z-
dc.date.issued2015-
dc.identifier.citationMaterials, 2015, v. 8, p. 1766-1777-
dc.identifier.urihttp://hdl.handle.net/10722/215046-
dc.description.abstractAbstract: This study concerned the effect of heat treatment during setting on the physical properties of four resin-based provisional restorative materials: Duralay (polymethyl methacrylate), Trim II (polyethyl methacrylate), Luxatemp (bis-acrylic composite), and Protemp 4 (bis-acrylic composite). Specimens were prepared at 23, 37, or 60 °C for evaluation of flexural strength, surface roughness, color change and marginal discrepancy. Flexural strength was determined by a three-point bending test. Surface profile was studied using atomic force microscopy. Color change was evaluated by comparing the color of the materials before and after placement in coffee. A travelling microscope helped prepare standardized crowns for assessment of marginal discrepancy. Flexural strength of all tested materials cured at 23 °C or 37 °C did not significantly change. The surface roughness and marginal discrepancy of the materials increased at 60 °C curing temperature. Marginal discrepancies, color stability, and other physical properties of materials cured at 23 °C or 37 °C did not significantly change. Flexural strength of certain provisional materials cured at 60 °C increased, but there was also an increase in surface roughness and marginal discrepancy.-
dc.languageeng-
dc.relation.ispartofMaterials-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleEffect of Heat Treatment on the Physical Properties of Provisional Crowns during Polymerization: An in Vitro Study-
dc.typeArticle-
dc.identifier.emailMei, L: mei1123@hku.hk-
dc.identifier.emailChu, CH: chchu@hku.hk-
dc.identifier.authorityMei, L=rp01840-
dc.identifier.authorityChu, CH=rp00022-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.3390/ma8041766-
dc.identifier.hkuros247664-
dc.identifier.volume8-
dc.identifier.spage1766-
dc.identifier.epage1777-

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