Hardness Changes of Tissue Conditioners in Various Storage Media: An in Vitro Study

Hardness Changes of Tissue Conditioners in Various Storage Media: An in Vitro Study Athanasios Ntounis, Phophi Kamposiora, George Papavasiliou, Kimon Divaris, Spiros Zinelis

The aim of the present study was to evaluate the effects of storage media on the longitudinal hardness changes of tissue conditioning materials. Four tissue-conditioning materials were used for fabrication of 80 disc-shaped specimens and divided in four groups, stored in four storage media. The specimens underwent artificial ageing corresponding to 30 nights of extra-oral storage. Hardness measurements were obtained at nine intervals between 8 and 240 hours after specimen fabrication. To test the effects of storage media on hardness we employed multivariate modelling (Bonferroni correction; α=0.05). The materials exhibited varying hardness changes, most pronounced when stored in ambient air.

Tissue conditioners, Soft liners, Denture cleansers, Hardness, Shore A