Unilateral Maxillary First Molar Extraction in Class II Subdivision: An Unconventional Treatment Alternative

Figure 4

(a–d) Class II correction on the right side using TPA anchorage and horizontal elastics. In this phase, premolars were not bonded to facilitate sliding mechanics. (e-f) After achieving Class I premolar relationship, the remaining teeth were bonded. (g) Space closure with elastic power chain. (g, h) Torque correction by means of a customized two-spur torque auxiliary of 0.014-inch regular wire and uprighting springs on the maxillary canine brackets.

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