Global ETD Search

141	The effect of storage time on dimensional accuracy of elastomeric impression materials. Osio, Mary A. January 2008 (has links) <p>&quot / Several factors play a role in stability of impressions made from elastomeric impression materials. These include / polymerization shrinkage, loss of by-products during condensation, thermal contraction from oral temperature to room temperature, imbibition when exposed to water, disinfectant or high humidity and incomplete recovery from deformation due to viscoelastic behavior. An ideal impression material should be dimensionally stable over time to allow for pour at the convenience of the operator. Several studies evaluated the dimensional accuracy of elastomeric impression materials based on various factors including effects of repeat pour, temperature, humidity, disinfectants, impression techniques, and filler loading amongst others. Most of the previous studies did not use the standardized method described by the ADA specification for elastomeric impression materials...&quot / </p> Dental Materials.
142	Bending, compression, and shear behavior of woven glass fiber/epoxy composites Yang, Bing 08 1900 (has links) No description available. Composite materials
143	The effects of powder metallurgical processing and intermediate thermal mechanical treatment on the fatigue properties of high strength aluminum alloys, X7091 Kuo, Victor Wei-Chung 08 1900 (has links) No description available. Materials Fatigue
144	Effects of hygrothermal conditioning on the dynamic behavior of resin matrix composites Briley, Ronald Patrick 12 1900 (has links) No description available. Composite materials
145	Estimation of the Ct parameter for primary creep Leung, Chun-Pok 08 1900 (has links) No description available. Materials Creep
146	Methods of analysis for anisotropic media Toland, Stephen William 08 1900 (has links) No description available. Composite materials
147	Spatial distribution of cobalt nanoclusters in a block copolymer matrix Tadd, Erica Heitman 12 1900 (has links) No description available. Nanostructure materials
148	Synthesis and characterization of nanostructured materials for electrochemical and catalytic applications Chen, Fanglin 08 1900 (has links) No description available. Nanostructure materials
149	Surface hardness of different shades and types of resin composite cured with a high power led light curing unit. Lodhi, Tariq Abbas January 2006 (has links) <p>Light-emitting diode (LED) curing lights were introduced to the dental market promising a higher curing efficiency than halogen-based lights. The earlier generation curing lights, however, proved not to be as effective as halogen lights. As a result 3M ESPE introduced a new high-powered LED curing light, the Elipar FreeLight 2, that delivers a greater irradiance. and threfore greater energy density than its precursor. Due to these changes, the light's manufacturer claims that the FreeLight 2 can cure resin composites at half of their recommended curing time. The aim of this study was to compare the effectiveness of cure when a FreeLight 2 was used to sure composite samples at 100% and at 50% of the recommended curing time.</p> Dental materials.
150	The effect of storage time on dimensional accuracy of elastomeric impression materials. Osio, Mary A. January 2008 (has links) <p>&quot / Several factors play a role in stability of impressions made from elastomeric impression materials. These include / polymerization shrinkage, loss of by-products during condensation, thermal contraction from oral temperature to room temperature, imbibition when exposed to water, disinfectant or high humidity and incomplete recovery from deformation due to viscoelastic behavior. An ideal impression material should be dimensionally stable over time to allow for pour at the convenience of the operator. Several studies evaluated the dimensional accuracy of elastomeric impression materials based on various factors including effects of repeat pour, temperature, humidity, disinfectants, impression techniques, and filler loading amongst others. Most of the previous studies did not use the standardized method described by the ADA specification for elastomeric impression materials...&quot / </p> Dental Materials.

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