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An 11-year-old girl was diagnosed with unilateral posterior crossbite, moderate incisor crowding and mesioangulation of the right mandibular second molar. The ectopic second molar was uprighted using a modified lingual arch with a distal hook and elastic chains. Orthodontic traction began after appliance installation and was activated once per month using 120 g of force. After six months, the right mandibular second molar was in an upright position. Orthodontic treatment continued with teeth levelling and alignment until acceptable occlusal and aesthetic results were achieved. Adequate stability was observed one year after debonding. The modified mandibular lingual arch with a distal hook is a simple and effective alternative to manage mesioangulation of mandibular second molars with minimum adverse effects and stable outcomes. <\/jats:p>","DOI":"10.1177\/14653125211017149","type":"journal-article","created":{"date-parts":[[2021,5,25]],"date-time":"2021-05-25T09:34:07Z","timestamp":1621935247000},"page":"64-70","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["Mesioangulation of mandibular second molars: A case report"],"prefix":"10.1177","volume":"49","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7785-1634","authenticated-orcid":false,"given":"Silvio Augusto","family":"Bellini-Pereira","sequence":"first","affiliation":[{"name":"Department of Orthodontics, Bauru Dental School, University of S\u00e3o Paulo, 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