[The evaluation of compressive strength of four filling materials for class I cavity].
OBJECTIVE
Compressive strength of four filling materials which are usually used in clinic were evaluated, and the indication of Class I cavity was discussed.


METHODS
In vitro, the Class I cavities were prepared on eighty first molars. After filling the cavities with four filling materials, loading was applied with the same speed, and the compressive strength at the fracture point were recorded and analyzed.


RESULTS
The compressive strength of silver amalgam was highest, GCFujiIXGP was lower, and 3M composite resin was lowest.


CONCLUSIONS
For Class I cavity of posterior teeth, we should consider the compressive strength of filling materials first, and for anterior teeth, color is most important.
Department of Stomotology, Reijin Hospital, Shanghai Second Medical University, Shanghai 200025, China.
H
H
Wang