ABSTRACT
Contemporary orthodontic brackets incorporate built-in tip designed to position the tooth at its correct inclination in the finished occlusion. The final expression of the built-in tip is dependent on careful and correct placement of the bracket in relation to the long axis of the tooth. Variations in the final tip do occur due to variations in manufacture, prescription, crown-root angulations, and placement of the bracket during bonding. The importance of correct final root angulations is highly relevant to achieving root paralleling following extractions and satisfactory aesthetics of the anterior teeth. Notwithstanding the use of prescription brackets, there are occasions when it is necessary or expedient to modify the tooth uprighting procedures with the use of auxiliary springs.
