Effect of Disinfection Treatments on the Hardness of Soft Denture Liner Materials |
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Authors: | Sabrina Pavan,DDS,MSc,PhD, Joã o Neudenir Arioli Filho,DDS,MSc,PhD, Paulo Henrique Dos Santos,DDS,MSc,PhD, Sé rgio Sualdini Nogueira,DDS,MSc,PhD, André Ulisses Dantas Batista,DDS,MSc,PhD |
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Affiliation: | Department of Dental Materials and Prosthodontics, Araraquara Dental School, S?o Paulo State University, Araraquara, S?o Paulo, Brazil. sabrinapavan@ig.com.br |
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Abstract: | PURPOSE: To evaluate the effects of disinfection treatments with chemical solutions (2% glutaraldehyde, 5% sodium hypochlorite, and 5% chlorhexidine) and microwave energy on the hardness of four long-term soft denture liners. MATERIALS AND METHODS: Forty rectangular specimens of four soft lining materials (Molloplast-B, Ufi Gel P, Eversoft, and Mucopren soft) were made for each material. Ten samples of each material were immersed in different disinfectant solutions for 10 minutes or placed in a microwave oven for 3 minutes at 500 W. The hardness values were obtained with a Shore A durometer, before the first disinfection cycle (control), and also after two cycles of disinfection. Data were submitted to analysis of variance and Tukey's test (p < 0.01). RESULTS: The highest value of hardness was obtained for Molloplast-B, independent of the disinfection technique. Mucopren soft demonstrated intermediate values and Ufi Gel P and Eversoft the lowest values of Shore A hardness. For Molloplast-B, the disinfection using glutaraldehyde demonstrated the highest value of hardness. The number of disinfections had no effect on the hardness values for all the materials studied and disinfection techniques. CONCLUSIONS: The application of two disinfection cycles did not change the Shore A hardness values for all the materials. The glutaraldehyde solution demonstrated the highest values of Shore A hardness for the Molloplast-B, Mucopren soft, and Ufi Gel P materials, while Eversoft did not present any differences in hardness when submitted to different disinfection treatments. |
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Keywords: | disinfection hardness soft liner material |
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