[Experimental study of the effect of intermediate substances on the margin seal of amalgam restorations]

In the preceding study Class-I-cavities in extracted human molars and premolars were restored using amalgam following diverse pretreatment methods. The teeth were stored in synthetic saliva for 7 days during the short-term test and for 6 months in the extended test. The tightness of the cavity seal was examined using a dye penetration test. The results show that the intermediate substances which may be applied have greatly divergent effects on the tightness of the seal around amalgam restorations.