Effect of Different Cleaning Regimes on Biofilm Formation of Acrylic-Based Removable Orthodontic Appliance: A Randomized Clinical Trial

Figure 3

Each appliance contained eight wells to house: four (5.5 mm) diameter polished tiles (yellow) and four similar diameter unpolished tiles (purple). The allocation of the polished tiles to the left or right sides, anterior or posterior of the removable appliance, was decided by a randomized number sheet; the unpolished tiles were subsequently inserted into the wells on the contralateral side.