Mechanical Degradation of Different Classes of Composite Resins Aged in Water, Air, and Oil

Table 1

Composite resin systems investigated in this study.

Composite  /; manufacturer	Composition of the organic matrix	Inorganic phase composition	Color	Manufacturing lot number	commercial classification
Filtek Z-100; (3M Dental Products, St. Paul, MN, USA)	Bis-GMA, TEGDMA	zirconia/silica; 4.5 μm (maximum size)	A 3.5	7EP	Hybrid
		71% by volume
Filtek Z-350; (3M Dental Products, St. Paul, MN, USA)	Bis-GMA, UDMA; Bis-EMA, TEGDMA	zirconia/silica; 0,005-0,02 μm; (5-20 nm); 0,6-1,4 μm; (agglomerate)	A 3.5	9AK	Nanocomposite
		59.5% by volume
Filtek P-90; (3M Dental Products, St. Paul, MN, USA)	Silorane	quartz; 0,4 um (medium size)	A 3.5	N130928	Silorane-based
		58%, by volume

Organic matrix composition and compressive load were provided by the manufacturer.