Figure 4.

Summary of tests performed during the study

		Number of samples (n) according to impression material
Material tested	Cylinder	Adsil	Aquasil Ultra	Express	TOTAL
Aluminum sulfate	I	10	10	10	30
Ferric sulfate	II	10	10	10	30
Aluminum chloride	III	10	10	10	30
Distilled water (control)	IV	10	10	10	30
Retraction cord*+Aluminum sulfate	I	10	10	10	30
Retraction cord*+Ferric sulfate	II	10	10	10	30
Retraction cord*+Aluminum chloride	III	10	10	10	30
Retraction cord*+Distilled water (control)	IV	10	10	10	30
Total number of specimens tested		80	80	80	240

^*Retraction cords that had been handled with latex gloves before tests.