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dc.contributor.authorRhim, So-Youngen_US
dc.date.accessioned2020-11-05T16:31:45Z
dc.date.available2020-11-05T16:31:45Z
dc.date.issued1999
dc.date.submitted1999
dc.identifier.other(OCoLC)1140223517
dc.identifier.other(OCoLC)on1140223517
dc.identifier.urihttps://hdl.handle.net/2144/41633
dc.descriptionPLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please click Download and log in with a valid BU account to access. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.en_US
dc.descriptionDissertation (DScD) --Boston University Henry M. Goldman School of Dental Medicine, 1999 (Prosthodontics).en_US
dc.descriptionIncludes bibliographic references: leaves 193-207.en_US
dc.description.abstractThe purpose of this investigation was to study the resistance to acid degradation of four low-fusing ceramic materials (Duceram-LFC, Finesse, Vita Omega900, and Sensation), two heat-pressed ceramic materials (Cerpress SL and IPS Empress), and a conventional feldspathic ceramic (Vita Omega). The weight loss, flexural strength, modulus of elasticity, fracture toughness, and microhardness before and after a standard hydrolysis test (ISO 6872) was measured for all materials tested. Twenty bars (1.5x2.0x25mm) of each low-fusing ceramic were fabricated from both dentin and enamel powders. Thirty bars of each heat-pressed ceramic were heat pressed from both layering and staining ingots according to manufacturer′s recommendations. Bars were randomly assigned to a control and treatment group. Treatment groups were weighed before and after placement in a Soxhlet extraction device containing a 4% acetic acid solution heated up to 80[degrees]C for 16 hours. A four point bending was applied to all bars using an Instron with a crosshead speed of 0.5mm/min. [TRUNCATED]en_US
dc.language.isoen_US
dc.publisherBoston Universityen_US
dc.rightsThis work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.en_US
dc.subjectDental porcelainen_US
dc.titleEffects of hydrolysis on physical properties of the low-fusing and heat-pressed ceramicsen_US
dc.typeThesis/Dissertationen_US
etd.degree.nameDoctor of Science in Dentistryen_US
etd.degree.leveldoctoralen_US
etd.degree.disciplineProsthodonticsen_US
etd.degree.grantorBoston Universityen_US


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