Rheology and surface properties of filled dispersions

Fataraitė, Eglė; Jankauskaitė, Virginija; Milinavičiūtė, A; Narmontas, Pranas

doi:10.3176/eng.2006.2.02

Cited by 2 publications

(1 citation statement)

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“…In comparison to BisGMA, which has two free hydroxyl groups, the cholic acid dimethacrylate 8, which also presents two hydroxyl groups, has a significantly greater viscosity, likely indicating that this monomer has a greater hydrodynamic radius than BisGMA according to the Stokes-Einstein equation, which would contribute to the observed lower polymerization shrinkage of the monomer mixture containing 8 versus that containing BisGMA. A small difference in the viscosity may not influence the maximum filler loading or handling characteristics of uncured composite pastes because these parameters are more influenced by the filler shape and content than the viscosity of the unfilled mixture (based on the Krieger-Dougherty equation, which describes the rheological properties of highly concentrated dispersions (33)).…”

Section: Resultsmentioning

confidence: 99%

New Dental Composites Containing Multimethacrylate Derivatives of Bile Acids: A Comparative Study with Commercial Monomers

Gauthier

Zhang

Zhu

2009

ACS Appl. Mater. Interfaces

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We have prepared multifunctional methacrylate derivatives of bile acids as cross-linkable monomers for use in dental composites. By modifying the chemical structure of the monomers, we were able to vary the viscosity, hydrophobicity, and reactivity and have studied the effect of these parameters on the conversion of the monomers, the shrinkage during polymerization, and the mechanical properties of the resulting polymers and composites. Materials containing these new monomers generally had physical, thermal, and mechanical properties comparable to those containing the commonly used dental monomers BisGMA or UDMA and had lower polymerization shrinkage. The multimethacrylate derivatives of cholic acid, which are known to be less cytotoxic than BisGMA and UDMA, are shown to be promising materials for dental applications.

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Section: Resultsmentioning

confidence: 99%