Effects of Filler Content on Mechanical and Optical Properties of Dental Composite Resins
نویسنده
چکیده
Filler –matrix coupling determines, to a large extent, the mechanical strength and clinical longevity of dental composites. Incorporation of filler into resin matrix greatly influences and improves material properties provided that filler particles are bonded to polymer matrix or otherwise it may actually weaken the resin. Benefits of filler content presence are increased hardness, strength, radiopacity and decrease in polymerization shrinkage, thermal expansion and contraction, water sorption, softening, staining and finally improved workability. Formulation of the monomer and filler, shear rate and temperature greatly influence characteristics of resin composite.(1) There are significant differences in number of filler particles, size and area occupied for the fine particle composite resins of different brands.(2)
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