Resumo

COELO GOIATO, Marcelo; MICHELINE DOS SANTOS, Daniela; FALCON ANTENUCCI, Rosse Mary  e  DO PRADO RIBEIRO, Paula. Influence of storage time on the hardness and roughness of soft liners materials. RCOE [online]. 2007, vol.12, n.1-2, pp.67-72. ISSN 1138-123X.

Statement of problem: Resilient soft liners materials have many important features that could be altered over time, like hardness and roughness. The aim of this study was to assess the influence of water storage on the hardness Shore A and roughness of four resilient soft liners materials. Materials and methods: Four materials were used: Dentuflex, Coe-Soft, Dentusoft and Dinabase, three temporary and one permanent material. For each material 7 specimens were made. The hardness and the roughness were evaluated in the initial period, after 30 and 90 days of distilled water storage at 35±2ºC. The results were submitted to analyses of variance (ANOVA) and the averages compared by Tukey's Test (p<0.05). Results: Dentuflex, Coe-Soft, Dentusoft and Dinabase displayed higher initial average of hardness values, whereas Dentuflex, Dentusoft, Coe-Soft and Dinabase higher initial average of roughness values. After water storage a significant increase in the hardness values in all materials was observed. Dentuflex material showed smaller roughness values, while the other materials increased significantly. Conclusion: Time storage influenced all the materials analyzed with respect to hardness and roughness.

Palavras-chave : Soft liners materials; Hardness; Roughness.

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