New PDF release: 1001 tips for orthodontics and its secrets

By Esequiel E. Rodriguez Yanez ; Coauthors, Larry White ... [et al.].

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5. Apply lingual torque to lower incisor roots. Group several anteroinferior teeth like an anchorage unit, while a posterior tooth is being pulled. Fig. 40. Positive torque in anteroinferior teeth. 6. 7. 8. Mesially incline the crowns of posterior teeth during their traction; this is done to ease the mesial movement of posterior teeth during space closure. Upright the posterior teeth roots subsequently. Use a transpalatine arch as anchorage while applying forces with Class III elastics. Place osseo integrated anchorage auxiliaries distal to the lower molars so they can act as intrabuccal absolute anchorage.

39. Active bend. Chapter 1 • Action and reaction Both examples are useful in order to predict the direction of dental movements produced by the forces of the arch wire. Now we have to know where to place the bend so we can identify over which teeth we want to place the force . If a bend is located far from the center of the arch wire, we will have two segments, a short one and a long one, that will produce equal forces in different directions. When the short segment of the bend is inserted in the tube, the long segment will indicate us the direction of the force produced over the teeth that are going to receive this Fig.

The Toe-in bend prevents palatomesial molar rotation. The Toe-out bend prevents buccodistal molar rotation. They are multipurpose anchorage elements because can correct and prevent rotations or increase dental arch length. Disadvantages 1. 2. 3. The patient can refer pain at molar level when the arch is placed in the molar tubes while the molars begin to rotate. It can provoke TMJ disorders due to premature contact points that can appear during molar inclination. We can debond the molar tube if we are not careful enough when inserting the wire.

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