Biofilm inhibition of denture cleaning tablets and carvacrol on denture bases produced with different techniques

Objectives This study compares the biofilm inhibition effects of denture cleaning tablets, carvacrol, and their combined use against Candida albicans on denture bases produced with different techniques. Additionally, the surface roughness and contact angles of these denture bases were evaluated. Materials and methods Test samples were prepared from four different denture base materials (cold-polymerized, heat-polymerized, CAD/CAM milling, and 3D-printed). The surface roughness and contact angles of the test samples were measured using a profilometer and goniometer, respectively. For the evaluation of biofilm inhibition, samples were divided into 5 subgroups: Corega and carvacrol, separately and combined treatments, positive (inoculated with C. albicans ) and negative control (non-inoculated with C. albicans , only medium). Biofilm mass was determined using the crystal violet method. An additional prepared test sample for each subgroup was examined under scanning electron microscopy (SEM). Results The surface roughness values of the 3D-printed test samples were found to be statistically higher than the other groups ( P .001). Corega and carvacrol, separately and combined, significantly decreased the amount of biofilm on all surfaces ( P