HIGH VISCOSITY BULK-FILL GIOMER AND ORMOCER-BASED RESIN COMPOSITES: AN IN-VITRO COMPARISON OF THEIR MECHANICAL BEHAVIOUR
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Nicoleta ILIE
Dipl. Eng, PhD, Professor Department of Operative / Restorative Dentistry, Periodontology and Pedodontics Ludwig-Maximilians University of Munich, Goethestr. 70, 80336 Münich, Germany
CV
Studies of“ Technology of silicates and high temperature oxides” at the“ Traian Vuia” University, Temeschburg, Romania( 1989-1993). Studies of material sciences with focus on glass and ceramics at the Friedrich Alexander University, Erlangen-Nürnberg, Germany( 1994-1999). Doctoral degree in material sciences from the Ludwig-Maximilians-University, Dental School, Münich, Germany( 1999-2004), followed by postdoctoral lecture qualification( habilitation) at the same university( 2004-2009). Since 1999, assistant professor, associated professor( 2009) and professor( 2014) for biomaterials at the Dental School of the Ludwig-Maximilians-University in Münich.
Questions
The difference between a bulk-fill and a regular resin composite is given by:
q a. Incremental thickness, which is ca. 2-mm for regular composites and up to 4-5-mm for bulk-fill composites; q b. Chemical composition of the organic matrix and filler system; q c. Way to be cure; q d. Mechanical properties.
Bulk-fill resin composites are subdivided with respect to following particularities:
q a. Bulk-fill composites are a unitary material category, with less difference among individual materials; q b. Mechanical properties: low-viscosity bulk-fill resin composites are characterized by lower mechanical properties compared to high-viscosity bulk-fill resin composites; q c. Application technique: low-viscosity bulk-fill resin composites need to be finished by an additional layer of a regular resin composite, while high-viscosity bulk-fill resin composites are intended to restore the entire preparation; q d. Incremental thickness.
What are“ Giomers”? q a. Resin-based composites with particular glass ionomer filler; q b. Resin-based composites able to release ions like F-; q c. Glass ionomers, and therefore this material category does not need to be cure by blue light; q d. A sort of ceramic.
What are“ Ormocers”?
q a. 3-dimensionally cross-linked inorganic-organic polymers; q b. A purely inorganic material; q c. A purely organic material; q d. A material able to release F-.
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