The invention provides a tube to be used in orthodontics wherein said tube replaces the use of brackets in an orthodontic treatment. The orthodontic tube of the present invention is surrounded by a resin and this resin also serves as a bond agent to affix the tube to a patient's tooth. The orthodontic tube serves as a conduit for an archwire in order to impose upon each tooth only the force required to reset the position of the tooth to a desired configuration relative to the other teeth in the patient's mouth.The orthodontic tube of the present invention has an enhanced external shape that better adapts to the teeth's geometry and therefore, it offers enlarged area of contact between the flat outer section of the orthodontics tube and the tooth; in addition, this flat outer section lessens the volume of the tube that extends outwardly from the patient's teeth and the configuration of the internal space of the tube enhances the control of the archwire within the tube and diminishes the friction, all these characteristics facilitate the reposition the teeth.