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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