Abstract
To improve the mechanical properties of crown and bridge resins, organic and/or inorganic fillers are added.However, heavy filler loading results in increased rigidity of the cured resin which then tends to fracture easily.Experimental crown and bridge resins were prepared by curing TEGDMA, BdDMA and BMA as liquid components with silica powder as a filler.The mechanical properties of these experimental crown and bridge resins were examined.The water sorption of the crown and bridge resins decreased as the concentration of BdDMA in the matrix resin increased.The transverse strength showed a maximum value of 203MPa at a concentration of 5vol% BdDMA in the crown and bridge resin containing 80wt% inorganic filler.Despite the high modulus of elasticity, the deflection of the cured resin was about 1.5 times as high as that without BdDMA.
