Abstract
The number of complete denture wearers will increase with the increase in the number of elderly persons. 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 nomal position by distributing the load applied at mastication. The compliance of these materials after gelation influences their efficacy. The purpose of this study was to compare compliance and the changes with time after gelation using a penetration test. Eight commercial tissue conditioners (Visco-Gel (VG), COE-Comfort (CC), Hydro-Cast (HC), Fitt (F), Soft-Liner (SL), Shofu Tissue Conditioner (STC), Bosworth Trusoft (BT) and Bosworth Softone (BS)) were used in this study. The depth of penetration at two hours after mixing, and the depth of penetration at seven days of each material were measured by a penetrometer. The order of depth of penetration at two hours was: VG (1.15±0.05mm), BT (1.17±0.09mm), F (1.22±0.09mm), SL (1.23±0.14mm), STC (1.69±0.16mm), BS (2.01±0.09mm), HC (3.00±0mm) and CC (3.00±0mm). The order of depth of penetration at seven days was: F (0.80±0.05mm), VG (0.98±0.08mm), SL (0.99±0.08mm), BT (1.05±0.03mm), STC (1.21±0.05mm), BS (1.32±0.02mm), HC (1.82±0.20mm) and CC (2.83±0.09mm). The differences among materials were significant, except for VG, BT, F and SL of the depth of penetration at two hours, and HC and CC of the depth of penetration at two hours, VG, SL and BT of the depth of penetration at seven days, and STC and BS of the depth of penetration at seven days (p<0.05) (ANOVA and Tukey's method).
