The effect of sealer and water storage on permanent deformation of a tissue conditioner

When they are used to treat inflamed, irritated, or distorted tissues or in implant therapy, tissue conditioners are required to function over relatively long time periods. Purpose: This in vitro study evaluated the effect of sealer and water storage on permanent deformation one tissue conditioner. Material and methods: Sixty cylindrically-shaped specimens (12.7-mm diameter 3 19.0-mm height) were used for the deformation tests. Specimens were divided into 6 test groups (n=10), according to surface treatment (sealer application) and water storage (1 hour, 1 week and 2 weeks). Permanent deformation, expressed as a percent (%), was determined using ADA specification no. 18. Data were examined a analysis of variance and a Mann-Whitney test (a= 0.05). Results: Significant differences were observed only after 1 week of water storage, for both groups. The surface treated group presented the highest permanent deformation percentage. Conclusions: This in vitro study indicated that the tissue conditioner evaluated is only useful for 1 week. After this period, the material must be replaced.