The objective of this study was to evaluate the consistency, setting time, compressive strength, diametral tensile strength, film thickness, solubility, disintegration, setting temperature rise, heat of reaction, staining properties, antibacterial effect and toxicological properties of representative thirty commercially available dental cements ? zinc phosphate (AD, AS, DH, FZ, GCB, HC, HZ, LZ, LMZ, SC and TZ), polycarboxylate (DA, DR, GCC, HPC, LC, PF, SCB and SU), glass ionomer (CB, LIC, Fl, LFI and F-Il), miscellaneous (AL, HB and OX), calcium hydroxide (DY), zinc oxide engenol (IR), FBA (OA) cements used in Korea.
These tests were measured by the modified methods of KDA Specification No. 2, 8., ISO 1566,4104., and ANSI/ADA Specification No.2,8.
The following conclusions can be drawn.
1 The results give a ranking order in terms of consistency o´ zinc phosphate, polycarboxylate and glass ionomer cements, but there are not significant differences between kinds of cements. The setting time was decreased followed by zinc phosphate, polycarboxylate and glass ionomer cements.
2. The compressive strength was highest in the case of zinc phosphate, followed by polycarboxylate and glass ionomer, the diametral tensile strength was highest inthe case of glass ionomer, polycarboxylate and zinc phosphate, and the film thickness was highest in the case of polycarboxylate, followed by glass ionomer and zinc phosphate cements.
3. The solubility was increased followed by glass ionomer, zinc phosphate and polycarboxylate cements, the disintegration after 24 hours was increased followed by glass ionomer, polycarboxylate and zinc phosphate, and the disintegration after 7 days was increased followed by glass ionomer, zinc phosphate and polycarboxylate cements.
4. The exothermic temperature of dental cements during setting was increased followed by zinc phosphate, glass ionomer and polycarboxylate cements and the time of peak during setting of cements was decreased followed by glass ionomer, polycarboxylate and zinc phosphate cements.
5. The results indicated that the dental cement did not increased the frequencies of micro nucleated polychromatic erythrocytes when compared with negative controls.
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