Evaluation of physicochemical properties of root-end filling materials using conventional and micro-CT tests

Objective to evaluate solubility,dimensional stability,filling ability and volumetric change of root-end filling materials using conventional tests and new micro-ct-based methods. material and methods solubility (loss of mass) after 7 and 30 days,and dimensional stability (in mm) were evaluated in accordance with carvalho-junior,et al. 7 (2007). the filling ability and volumetric change (in mm3) were evaluated by micro-ct (bruker-microct,kontich,belgium) using resin models with cavities 3 mm deep and 1 mm in diameter. the cavities were filled with materials to evaluate filling ability,and then scanned by micro-ct. after 7 and 30 days immersed in distilled water,the filled cavities were scanned again to evaluate the volumetric change. mta angelus (mta),biodentine (bio) and zinc oxide-eugenol cement (zoe) were evaluated. data were submitted to analysis of variance (anova) and tukey’s test with 5% significance level. results the results suggested correlated or complementary data between the proposed tests. at 7 days,bio showed higher solubility and at 30 days,showed higher volumetric change in comparison with mta (p<0.05). with regard to volumetric change,the tested materials were similar (p>0.05) at 7 days. at 30 days,they presented similar solubility. bio and mta showed higher dimensional stability than zoe (p<0.05). zoe and bio showed higher filling ability (p<0.05). conclusions zoe presented a higher dimensional change,and bio had greater solubility after 7 days. bio presented filling ability and dimensional stability,but greater volumetric change than mta after 30 days. micro-ct can provide important data on the physicochemical properties of materials complementing conventional tests. © 2017,faculdade de odontologia de bauru. all rights reserved.