Extraction! as! a! strategy! was! adopted,! however, without evidencebeyond selected cases that it produced stable results.! The! decline! in!extraction! rates! more! recently! has! several! reasons.! Experience! has!shown!that!premolar!extraction!does!not!necessarily!guarantee!stability!of!tooth!alignment,!and!one!could!argue!that!if!the!results are not very stable either way,! there! is! no! reason! to! sacrifice! teeth.! It! can! also! be!argued! that! if! extraction! cases! are! unstable,! nonIextraction! cases! are!unstable!too!&!so!nonIextraction!would!be!worse.!!!
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