3) Extraction of left maxillary first premolar, right maxillary second premolar and mandibular second premolars, followed by corrective orthodontic treatment using Tweed-Merrifield technique, with ...

Conclusion: LB significantly expanded the mandibular transverse dimension dentally, with permanent canine and premolars erupting more buccally. However, it does not increase the skeletal transverse ...

The maxillary second premolars showed progressive and significantly smaller mesial angulation and mesialization in the Jones jig, First Class and Distal jet groups, respectively ( Table 4 ).