Materiale Plastice
Cite as: Mater. Plast.

OSIM Nr. R102356
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Materiale Plastice (Mater. Plast.), Year 2009, Volume 46, Issue 4,

Marioara Moldovan, Adrian Almasi2, Cristina Prejmerean1, Olga Musat, Laura Silaghi Dumitrescu, Codruta Nicola, Ileana Cojocaru, Ovidiu Pastrav The Study of Some Experimental and Commercial Nanocomposites Used in Dentistry

The most appealing aspect related to nano-composites use, consists of their biomechanical properties; these properties succeed in giving good mechanical strength, a minimal polymerization contraction and an exceptional aesthetics and polish due to the features of the nano-filler. Investigating the effect upon both the filler level and the size of the filler particles on some experimental composites’ mechanical and physico-chemical properties, some authors have come to the conclusion that by increasing the filler level can be obtain first of all an increasing of the compression resistance and secondly a significant decrease of water absorption. The vast majority of the investigated composites, based on borosilicate glass, are showing an important increase of their resistance to wear together with the increase of the filler level. In this particular study the resistance to traction and respectively to fracture and also the structure (SEM) for some experimental nanocomposites (produced in our laboratory) and for a commercial product (Premise - Kerr Corporation) has been determined. The samples of material were made according to the ISO 4049 specifications; they were tested with the use of the Instron Universal Lloyd apparatus and the Scanning Electronic Microscope (SEM - FEI). Keywords: nanocomposites, physical properties, flexural strength, diametral tensile strength, SEM

Issue: 2009 Volume 46, Issue 4
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