Methods: A total of 120 glass ring molds (8.5 mm inner diameter, 2 mm-thick) were prepared, after which the internal surface of the molds were etched with hydrofluoric acid for 5 min. The test materials (n=20/group) were placed into the molds, and thereafter, sandwiched between two glass slides. All groups were polymerized for 20 seconds using a high-intensity QTH light unit (Optilux 501). The volumetric polymerization shrinkage for each system was measured using the specific density method. All data were analyzed statistically using One-way Analysis of Variance and Tukey HSD tests at p=0.05.
Results: A ranking for the shrinkage values were obtained as follows: Teethmate F-1 (7.40±1.17%)> Clinpro TM Sealant (6.60±1.54%)> Dyract Seal (5.38±1.30%)> Smartseal & loc (5.06±1.22%)> Fissurit FX (4.30±1.15%)> Helioseal F (3.30±0.69%). ClinproTM Sealant and Teethmate F-1 displayed the highest shrinkage values (p<0.05). The lowest shrinkage values were obtained with Helioseal F (3.30 ± 0.69% ) and Fissurit FX (4.30 ± 1.15%) (p<0.05).
Conclusions: Within the experimental conditions of the present study, the tested sealant materials containing higher concentrations of fillers displayed lower polimerization shrinkage values.