[Experimental study on the reinforced effect of light  curing composite resins used for crowns and bridges].
OBJECTIVE
To evaluate the reinforced effect of the light curing composite resins used for crowns and bridges.


METHODS
Three light curing composite resins which were used for crowns and bridges were chosen, and three polyester fiber sieves and three stainless steel sieves in different mesh were used as the additional reinforced materials. Compressive strength and three point flexural strength of test bars made of those materials were evaluated. The reinforced bridges with special fibers were used as control groups.


RESULTS
(1)There was significant increase in the stainless steel sieves groups. Nevertheless, there was some decrease after use of the polyester fibers as the additional reinforced material. (2)The increase of the reinforced crowns was especially obvious. (3)Among the three resins, the property of Targis was better than that of Arglass and Solidex.


CONCLUSIONS
The properties of the whole composite material were closely correlated with the additional reinforced materials, the resistance to compression of the sieves are better than its resistance to bend.
School of Stomatology, Shanghai Second Medical University, Shanghai 200011, China.
J
J
Sun
J Z
JZ
Zhang