Fig. 1From: Effects of different designs of orthodontic clear aligners on the maxillary central incisors in the tooth extraction cases: a biomechanical study(a) The model of maxillary bone; (b) The model of maxillary dentition; (c) The model of maxillary periodontal ligaments; (d) The model of clear aligner; (e) The model assembly; (f) The global coordinate systemBack to article page