{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T14:34:38Z","timestamp":1787668478468,"version":"build-2736575974"},"reference-count":40,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2023,4,1]],"date-time":"2023-04-01T00:00:00Z","timestamp":1680307200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Orthod Craniofacial Res"],"published-print":{"date-parts":[[2023,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To analyse the morphometric changes in the anterior alveolar bone of both the maxilla and mandible after space closure and retention for 18\u201036\u2009mo in adults and adolescents.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Forty\u2010two subjects with 4 first premolars extracted followed by retracting anterior teeth were included and divided into two age groups: adult group (4 males, 17 females, mean age: 23.67\u2009\u00b1\u20095.29\u2009y, treatment duration: 27.95\u2009mo, retention duration: 26.96\u2009mo, ANB: 4.8\u2009\u00b1\u20092.1, U1\u2010L1: 117.2\u2009\u00b1\u20099.2, U1\u2010PP: 120.2\u2009\u00b1\u20097.2, L1\u2010MP: 99.2\u2009\u00b1\u20095.3) and adolescent group (6 males, 15 females, mean age: 11.52\u2009\u00b1\u20091.21\u2009y, treatment duration: 26.18\u2009mo, retention duration: 25.79\u2009mo, ANB: 5.2\u2009\u00b1\u20092.1, U1\u2010L1: 116.0\u2009\u00b1\u20098.6, U1\u2010PP: 119.8\u2009\u00b1\u20094.9, L1\u2010MP: 99.7\u2009\u00b1\u20094.9). Alveolar bone height and thickness of anterior teeth in both groups were measured using cone beam computed tomography (CBCT) imaging performed at the pretreatment (T1), posttreatment (T2) and retention phases (T3). One\u2010way repeated\u2010measure ANOVAs were performed to evaluate the alveolar bone changes. Voxel\u2010based superimpositions were performed to measure the amount of tooth movement.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>After orthodontic treatment, the lingual bone height and thickness of both arches and the labial bone height of the mandible decreased significantly in both age groups (<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.05). Most of the labial bone height and thickness of the maxilla in both groups remained unchanged (<jats:italic>P<\/jats:italic>\u2009&gt;\u2009.05). After retention, the lingual bone height and thickness increased significantly in both age groups (<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.05). The amounts of increased height ranged from 1.08 to 1.64\u2009mm in adults and from 0.78 to 1.21\u2009mm in adolescents, and the amounts of increased thickness ranged from 0.23\u2009mm to 0.62\u2009mm in adults and from 0.16\u2009mm to 0.36\u2009mm in adolescents. Obvious movements of the anterior teeth during retention were not found (<jats:italic>P<\/jats:italic>\u2009&gt;\u2009.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Although lingual alveolar bone loss occurred in adolescents and adults during orthodontic treatment, continuous remodelling occurred in the later retention phase, which provides a reference for clinical treatment planning of bimaxillary dentoalveolar protrusion.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ocr.12657","type":"journal-article","created":{"date-parts":[[2023,3,28]],"date-time":"2023-03-28T13:25:11Z","timestamp":1680009911000},"page":"618-631","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Long\u2010term morphometric changes in the anterior alveolar bone in adolescents and adults after space closure: A retrospective 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Medical University  Chongqing China"},{"name":"Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences  Chongqing China"},{"name":"Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education  Chongqing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nan","family":"Luo","sequence":"additional","affiliation":[{"name":"Stomatological Hospital of Chongqing Medical University  Chongqing China"},{"name":"Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences  Chongqing China"},{"name":"Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education  Chongqing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yan","family":"Wu","sequence":"additional","affiliation":[{"name":"Stomatological Hospital of Chongqing Medical University  Chongqing China"},{"name":"Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences  Chongqing China"},{"name":"Chongqing Municipal Key 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