Abstract
The number of complete denture wearers will rise with the increase in the elderly population. Long-term use of ill-fitting dentures causes mechanical injury and deformation of the basal seat mucosa. Tissue conditioners are used to restore the deformed unhealthy basal seat mucosa and to return it to the normal position by distributing the load applied at mastication. However, the main problem with this material is that the plasticizer will gradually leach out causing the material to harden. Therefore in this study, we examined the influence of different solutions on the dynamic viscoelasticity, surface roughness and compliance. We used a new tissue conditioner “TissueCare” (TC) and 3 commercial tissue conditioners; COE-Comfort (CC), Shofu Tissue Conditioner II (STC) and Bosworth Softone (BST). Distilled water, artificial sali-va and cottonseed oil were used for the solution. The dynamic viscoelasticity was most stable over time with material TC. Surface roughness was most stable over time with STC. Artificial saliva had the largest effect on the surface roughness of materials. TC satisfied ISO standard, and it was classified in class II of the low initial compliance. The influence of solution and immersion time on the dynamic viscoelasticity, sur-face roughness and compliance of the material was different. The results suggest that the new tissue conditioner “TissueCare” is extremely durable, and should be used clinically mainly for temporary relining.
