[Experimental study of material properties of calcium salicylate cement with and without polymeric additives].

ZWR - Das Deutsche Zahnärzteblatt 100(7):442 (1991) PMID 1950182

In this study a new calcium-salicylate cement with an additional polymerized filler material (Alkaliner) was compared with a commonly used calcium-salicylate cement without polymerized filler material (Dycal) regarding the microstructure, the EDX elemental analysis, the hydroxid ion release, the compressive strength and the film thickness. The tests showed the following results: 1. Alkaliner and Dycal are almost identical in relation to their micro-morphology and elementary composition (EDX-analysis). 2. In the titration test, Dycal and Alkaliner show no significant differences (p = 0.05) in the hydroxid ion release. 3. Having stored the specimens in synthetic saliva for 2 days, the compressive strength of 25 MPa is noted for both of the materials. Having stored the specimens for 150 days, the compressive strength of Alkaliner (8.3 MPa) is significantly (p = 0.05) higher than that of Dycal (3.8 MPa). 4. The film thickness was measured by placing the materials between dry glass-plates. Dycal measures an average of 19.8 micrometers and Alkaliner of 30 micrometers. Under these experimental conditions the measured difference is statistically significant (p = 0.05). Placing the materials between damp glass-plates, the film thicknesses increase to an average of 56.5 micrometers (Dycal) and of 50 micrometers (Alkaliner) respectively. This difference however, is statistically not significant (p = 0.05).