Resumo

FONTE-BOA, Juliene Caetano et al. Dimensional analysis of alginate molds after storage. Arq. Odontol. [online]. 2016, vol.52, n.2, pp. 1-6. ISSN 1516-0939.

Aim: The objective of this study was to 5 evaluate the dimensional stability os the molds of two different alginates (Cavex Color Changer and Hydrogum®5), at different intervals, kept in environments, as recommended by manufacturers, using two different devices (D1 and D2, figures 1 and 2, respectively). Methods: After the manipulation and complete cured of alginates, measurements were made directly in the alginate molds, at times T0, T1, T2, T3, T4, and T5 (immediately, 30 min, 2 hours, 24 hours, 48 hours, and 120 hours, respectively), to calculate the percentage of dimensional change of the molds in each device. Data were analyzed by the Two-Way ANOVA and Tukey post-hoc test, with a 5% significance level. Results: Statistical analysis showed differences between times(F= 29.956, p<0,001), but no differences were found for both time ( F=3.155; p=0,076) for device 1. For device2, statistically differences were found for both time (F=21.495; p<0.001) and alginates (F=5.595; p=0.015). Conclusions: The tested alginates can only be safely stored for up to two hours after their cure.

Palavras-chave : Alginates; Dimensional measurement accuracy.