Research Article

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

Figure 2

Construction of a modified acrylic-based orthodontic appliance. (a) Study model with metal discs; (b) fitting surface of the removable acrylic appliance with a chimney-like structure.
(a)
(b)