Abstract:This study was aimed at analysing the mechanical characteristics of different mandibular extraction modes using a clear aligner. Three experimental schemes of different extraction patterns were designed to treat mandibular crowding, including extraction of one mandibular central incisor, bilateral first premolars, and bilateral second premolars. The stress distribution during the space closing was analysed using the finite element method. When a central incisor was extracted, a significant retraction force was… Show more
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