Profile: Ois Orthodontics manufactures acrylics, equipment, laboratory and orthodontic products. Our acrylic is specifically designed for orthodontic applications, which have fine-grained material that provides excellent working characteristics to achieve a glass-like finish. Bicuspid bands are available in 32 sizes, lowers coded in blue, uppers coded in red. When seating the band, its well-contoured triangular shape renders a bucco-lingual extension, allowing a full and suitable edge fit.