Comparison of the Effect of Nystatin and Titanium Dioxide Addition on Candida Colonization in Soft Lining Material

Abstract

Material and methods. Disks of Ufi Gel P and Mollosil cold-curing, soft relining materials with a diameter of 5 mm and thickness of 2 mm were prepared with nystatin and TiO 2 powders in a concentration of 5%, 10%, and 15% (w/v). For the control group, only discs not containing nystatin and TiO 2 were prepared, which consisted only of soft lining material. C. albicans was inoculated on Sabouraud dextrose agar (SDA)-coated plates. The disks were placed on these plates and incubated aerobically at 37° C.The Ufi Gel P and Mollosil disks, including 10% w/v nystatin, (re-prepared for the second step of the study) were immersed in water for separate intervals (1, 7, 14, and 16 days) to determine the fungicidal action over time. The disks were then removed and placed on SDA plates inoculated with C. albicans. In each group, one control disk without nystatin or TiO 2 was included. Results.A univariate analysis of variance test revealed that the activity of C. albicans was not significantly inhibited on the control disks (p < 0.001). The addition of nystatin in powder form to the soft liners prevented the colonization of C. albicans in vitro. The immersion time of the disks plunged in water appeared to affect the degree of inhibition. However, the addition of TiO 2 did not prevent colonization by C. albicans of the soft liners.Conclusions. This study showed that the addition of nystatin in powder form to soft liners prevented the colonization of C. albicans in vitro but that the addition of the same amount of TiO 2 powder did not.