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Displaying 101 - 123 of 123

Synthesis, Characterization and Evaluation of Urethane Derivatives of Bis-GMA

September 1, 2000
Author(s)
C A. Khatri, J W. Stansbury, Carl R. Schultesiz, Joseph M. Antonucci
The dimethacrylate monomer designated as Bis-GMA ushered in the modern era of polymeric dental restorative, sealant and adhesive materials. Because of its high viscosity, primarily due to the strong hydrogen bond interactions arising from its two hydroxyl

MALDI-TOF Mass Spectrometry of Polymeric Silsesquioxanes

March 1, 2000
Author(s)
William E. Wallace, Charles M. Guttman, Joseph M. Antonucci
Matrix-assisted laser desorption ionization time-of-flight mass spectrometry has been shown to be an effective method to determine the degree-of-intramolecular-condensation of polymeric silsesquioxanes. The nature of the organic R' leaving group was found

Strengthening Composite Resin Restorations via Ceramic Whisker Reinforcement

February 1, 2000
Author(s)
Hockin D. Xu, Gary E. Schumacher, F Eichmiller, Joseph M. Antonucci
Due to their tendency to fracture, current composite for mulations are unsuitalbe for use in large stress-bearing direct posterior restorations that involve cusps. This study investigated the use of single-crystalline ceramic whiskers for the reinforcement

A Microshear Test to Measure the Bond Between Dental Composites and Dental Substrates

January 1, 2000
Author(s)
Walter G. McDonough, Joseph M. Antonucci, Gary E. Schumacher, Y Shimada
Mechanical property tests such as the diametral tensile, uniaxial tensile, biaxial flexural, shear, and transverse strength tests are commonly used for assessing the bond that forms between dental composites and dental substrates such as dentin and enamel

Indentation Modulus and Hardness of Whisker-Reinforced Heat-Cured Dental Resin Composites

January 1, 2000
Author(s)
H H. Xu, Douglas T. Smith, Gary E. Schumacher, F Eichmiller, Joseph M. Antonucci
Recent studies showed that ceramic whisker reinforcement imparted a nearly two-fold increase in the strength of dental resin composites. The aim of the study was to investigate the indentation response and measure the elastic modulus hardness, and

Demineralizing Effect of Dental Cements on Human Dentin

November 1, 1998
Author(s)
Y Shimada, Y Kondo, S Inokoshi, J Tagami, Joseph M. Antonucci
This study was undertaken to verigy the hypothesis that dentin surfaces are demineralized during placement of four kinds of chemically setting cements (zinc phosphate cement, luting glass-ionomer cement, restorative glass-ionomer cement, and zinc

Effect of Powder Grinding on Hydroxyapatite Formation in a Polymeric Calcium Phosphate Cement Prepared from Tetracalcium Phosphate and Poly[Methyl Vinyl Ether-Maleic Acid]

November 1, 1998
Author(s)
Y Matsuya, S Matsuya, Joseph M. Antonucci, S. Takagi, Laurence C. Chow, A Akamine
The primary aim of this study was to determine if cement based on poly(methyl vinyl ether-maleic acid) (PMVE-Ma) and tetracalcium phosphate (TTCP) resulted in hydroxyapatite (OHAp) formation. In addition, the mechanical strength of this type of polymeric

Evaluation of Dental Adhesion and Durability by Means of the Microbond Test

February 25, 1998
Author(s)
Joseph M. Antonucci, Walter G. McDonough, Joy P. Dunkers
The phenomenon of interfacial of interphase adhesion is a critical factor in determining the strength and durability of multiphase dental materials. For example, the clinical performance of acrylic polymer based dental composites depends to a large extent
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