COMPOSITION
The monomer matrix is composed of different dimethacrylates (18–22% weight)and ULS® (Ultra Low Syhrinkage) Monomer . The fillers contain barium glasses, ytterbium and prepolymer (83–78 % weight), additives, catalysts, stabilizers and pigments .
MONOMER TECHNOLOGY
Compo C is designed with the high molecular weight reduced shrinkage resins. The higher molecular weight of the resin results in less shrinkage, reduced aging and a slightly softer flexible resin matrix. Additionally these resins impart a greater hydrophobicity and are less water absorption. Nova Compo C contains very small amount of diluent monomers like TEGDMA. The diluent monomers have low molecular weight and high crosslinking capability, thus resulting in high elastic modulus and stiffness of the composite. Ideally composite restorations should not have high modulus of elasticity. The high modulus of elasticity composites are stiff, brittle materials and are not efficient in buffering high stress. The Modulus of Elasticity is optimised for Nova Compo C. Low molecular weight monomers increase the volumetric shrinkage and shrinkage stress of the composite.
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