An orthodontic anchor (10) to be attached to the surface (12) of a tooth (11). The anchor (10) includes a base (13) which is in the form of a plate having a surface (14) that is dually fixed to the surface (12). Base (13) is in the form of a duct portion (15) providing a through passage (16). The passage (16) receives a tube (19), through which an elongated orthodontic element, such as a wire (21) or a chain can pass.
