VASCONCELLOS, Frederico Emygdio Cabral de et al. Dimensional stability of casts obtained with polyether and addition reaction silicone after disinfection with sodium hypochlorite and peracetic acid. Rev. Bras. Odontol. []. 2012, 69, 1, pp. 55-60. ISSN 1984-3747.

This study aimed to compare the dimensional stability of polyether (P), addition silicone auto mixed (ASP) and addition silicone hand mixed (ASM) molds after disinfection with sodium hypochlorite 1% (HP), peracetic acid 0,2% (AP), and no disinfection. Mensurations cross posterior arch (CAP), cross-anterior arch (CAA), and antero-posterior on right (APD) and left sides (APE). Statistical analysis (Kruskall-Wallis) showed significant difference only in measure CAP: 1) between P (0,1203% ± 0,0442) and SAP (0,0350% ± 0,0158) disinfected with HP; 2) between P (0,1345% ± 0,1059) and SAP (0,0264% ± 0,0302) disinfected with AP; and 3) between SAM (0,1054% ± 0,0419) and SAP (0,0264% ± 0,0302). Disinfection with peracetic acid and sodium hypochlorite did not interfere negatively in the dimensional accuracy of the impressions tested in this study. Keywords: impression materials; disinfection; peracetic acid; sodium hypochlorite.

: impression materials; disinfection; peracetic acid; sodium hypochlorite.