comparison of ah26 physicochemical properties with two ah26/antibiotic combinations

introduction: the purpose of this study was to compare the setting time and post-setting solubility, flow, film thickness and dimensional changes of ah26 root canal sealer with ah26-antibiotic combination. materials and methods: this study was performed according to british standard bs 6876 (2001) which tests the physicochemical properties of endodontic sealers. three samples of each of tested materials including ah26 alone, ah26/amoxicillin and ah26/doxycycline were used to test each of the properties. they were prepared according to iso protocols. results: the setting time of studied materials was 46 hours for ah26, 29 hours for ah26/amoxicillin, 49 hours for ah26/doxycycline. flow test results were as follows, for ah 26, 15.6 mm; ah26/amoxicillin, 14.9 mm; ah26/doxycycline, 14.2 mm. film thickness was 0.024 mm in ah26, 0.0283 mm in ah26/amoxicillin, 0.0276 mm ah26/doxycycline. the solubility of ah26 was 0.0076%, ah26/amoxicillin, 0.0113%, and for ah26/doxycycline, 0.013 %. dimensional changes following setting was 0.07 mm, 2.6 mm, and 1.1 mm for ah 26, ah26/amoxicillin, and ah26/doxycycline, respectively. conclusion: the physico-mechanical properties of ah26 antibiotic combinations were superior compared with ah26, with the exception of flow. also, ah26/amoxicillin had a lower setting time than ah26. however, all values were within an acceptable range which conformed to iso.