1. Cytotoxicity of some modified root canal sealers and their leachable components;Barbosa;Oral Surg Oral Med Oral Pathol 75(3),1993
2. Browne RM (1988) The in vitro assessment of the cytotoxicity of dental materials-does it have a role? Int Endod J 21(2): 50-58.
3. Cytotoxicity of Endodontic Materials;Osorio;J Endodon 24(2),1998
4. ANSI/ADA (1979) ANSI/ADA American National Standards Institute/American Dental Association, Specification No. 41 in biological evaluation of dental materials.
5. FDI (1980) FDI Recommended standard practices for biological evaluation of dental materials. Technical Report no 9, Int Endod J 30: 140-188.