{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T10:57:43Z","timestamp":1780484263293,"version":"3.54.1"},"reference-count":24,"publisher":"FapUNIFESP (SciELO)","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Braz. Dent. J."],"published-print":{"date-parts":[[2011]]},"abstract":"<jats:p>This study investigated, using cone beam computed tomography (CBCT), the spatial mandibular positioning after rapid maxillary expansion (RME) in Class II Division 1 malocclusion. This prospective study evaluated 17 children (mean initial age 10.36 years old) presenting Class II, Division 1 malocclusion and skeletal maxillary constriction that underwent to RME Haas\u2019 protocol. CBCT was performed before treatment (T1), immediately after the stabilization of expander screw (T2) and after the retention period of 6 months (T3). The scans were managed in Dolphin Imaging\u00ae 11.0 software, where landmarks (right and left condylion, right and left gonion, and menton) were positioned and measured in relation to sagittal, coronal and axial plane to verify, respectively, transverse, anteroposterior and vertical displacement of the mandible. Paired Student\u2019s t-test was used to identify significant differences (p&lt;0.05) between T1 and T2, T2 and T3, and T1 and T3. After RME, right and left gonion moved downward (1.11 mm and 0.89 mm) and menton displaced downward (1.90 mm) and backward (1.50 mm). During the retention period, only anteroposterior displacement was significant, with the right and left gonion (0.97 mm and 1.26 mm) and the menton (2.29 mm) moving forward. Three-dimensional assessment of the mandible in Class II Division 1 patients subjected to RME showed a transitory backward and downward mandibular positioning, without any lateral displacement. The 6-month retention period allowed the mandible shifting significantly forward, exhibiting a more anterior position compared with the initial condition, even remaining in a more downward direction.<\/jats:p>","DOI":"10.1590\/s0103-64402011000500014","type":"journal-article","created":{"date-parts":[[2017,3,31]],"date-time":"2017-03-31T03:36:38Z","timestamp":1490931398000},"page":"428-434","source":"Crossref","is-referenced-by-count":24,"title":["3D mandibular positioning after rapid maxillary expansion in Class II malocclusion"],"prefix":"10.1590","volume":"22","author":[{"given":"Carolina","family":"Baratieri","sequence":"first","affiliation":[{"name":"University of Rio de Janeiro,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matheus","family":"Alves Jr","sequence":"additional","affiliation":[{"name":"University of Rio de Janeiro,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eduardo Franzotti","family":"Sant\u2019anna","sequence":"additional","affiliation":[{"name":"University of Rio de Janeiro,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matilde da Cunha Gon\u00e7alves","family":"Nojima","sequence":"additional","affiliation":[{"name":"University of Rio de Janeiro,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lincoln Issamu","family":"Nojima","sequence":"additional","affiliation":[{"name":"University of Rio de Janeiro,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"530","reference":[{"key":"ref1","first-page":"177","article-title":"Components of Class II malocclusion in children 8-10 years of age","volume":"51","author":"McNamara J","year":"1981","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref2","doi-asserted-by":"crossref","first-page":"417","DOI":"10.1016\/S0889-5406(96)70045-8","article-title":"Role of posterior transverse interarch discrepancy in Class II, Division 1 malocclusion during the mixed dentition phase","volume":"110","author":"Tollaro I","year":"1996","journal-title":"Am J Orthod Dentofacial Orthop","ISSN":"https:\/\/id.crossref.org\/issn\/0889-5406","issn-type":"print"},{"key":"ref3","first-page":"21","article-title":"Morphometric analysis of the transverse dentoskeletal features of Class II malocclusion in the mixed dentition","volume":"73","author":"Alarashi M","year":"2003","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref4","doi-asserted-by":"crossref","first-page":"576","DOI":"10.1016\/j.ajodo.2004.06.011","article-title":"Spontaneous mandibular arch response after rapid palatal expansion: a long-term study on Class I malocclusion","volume":"126","author":"Lima AC","year":"2004","journal-title":"Am J Orthod Dentofacial Orthop","ISSN":"https:\/\/id.crossref.org\/issn\/0889-5406","issn-type":"print"},{"key":"ref5","doi-asserted-by":"crossref","first-page":"502","DOI":"10.1016\/S0889-5406(97)70287-7","article-title":"Early dentofacial features of Class II malocclusion: a longitudinal study from the deciduous through the mixed dentition","volume":"111","author":"Baccetti T","year":"1997","journal-title":"Am J Orthod Dentofacial Orthop","ISSN":"https:\/\/id.crossref.org\/issn\/0889-5406","issn-type":"print"},{"key":"ref6","first-page":"73","article-title":"Rapid expansion of the maxillary dental arch and nasal cavity by opening the midpalatal suture","volume":"31","author":"Haas AJ","year":"1961","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref7","doi-asserted-by":"crossref","first-page":"870","DOI":"10.2319\/071406-293.1","article-title":"Long-term anteroposterior and vertical maxillary changes in skeletal Class II patients treated with slow and rapid maxillary expansion","volume":"77","author":"Lima Filho RMA","year":"2007","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref8","doi-asserted-by":"crossref","first-page":"376","DOI":"10.1590\/S0103-64402009000500004","article-title":"Cone-beam computed tomography analysis of the apical third of curved roots after mechanical preparation with different automated systems","volume":"20","author":"Oliveira CAP","year":"2009","journal-title":"Braz Dent J","ISSN":"https:\/\/id.crossref.org\/issn\/0103-6440","issn-type":"print"},{"key":"ref9","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1590\/S0103-64402011000200010","article-title":"Relationship between maxillary canine intra-alveolar position and maxillary incisor angulation: a cone beam computed tomography study","volume":"22","author":"Baratieri C","year":"2011","journal-title":"Braz Dent J","ISSN":"https:\/\/id.crossref.org\/issn\/0103-6440","issn-type":"print"},{"key":"ref10","first-page":"133","article-title":"Cone-beam computed tomography for routine orthodontic treatment planning: a radiation dose evaluation","author":"Silva MAG","year":"2008","journal-title":"Am J Orthod Dentofacial Orthop","ISSN":"https:\/\/id.crossref.org\/issn\/0889-5406","issn-type":"print"},{"key":"ref11","first-page":"142","article-title":"The relation of maxillary structures to cranium in malocclusion and in normal occlusion","volume":"22","author":"Riedel RA","year":"1952","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref12","first-page":"115","article-title":"Perspectives in the clinical application of cephalometrics","volume":"51","author":"Ricketts RM","year":"1981","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref13","doi-asserted-by":"crossref","first-page":"426","DOI":"10.1016\/j.ajodo.2005.12.031","article-title":"Three-dimensional reconstruction of individual cervical vertebrae from cone-beam computed-tomography images","volume":"131","author":"Shi H","year":"2007","journal-title":"Am J Orthod Dentofacial Orthop","ISSN":"https:\/\/id.crossref.org\/issn\/0889-5406","issn-type":"print"},{"key":"ref14","doi-asserted-by":"crossref","first-page":"219","DOI":"10.1016\/0002-9416(70)90241-1","article-title":"Palatal expansion: just the beginning of dentofacial orthopedics","volume":"57","author":"Haas AJ","year":"1970","journal-title":"Am J Orthod Dentofacial Orthop","ISSN":"https:\/\/id.crossref.org\/issn\/0889-5406","issn-type":"print"},{"key":"ref15","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1590\/S2176-94512010000500011","article-title":"Transverse effects of rapid maxillary expansion in Class II malocclusion patients: a cone-beam computed tomography study","volume":"15","author":"Baratieri C","year":"2011","journal-title":"Dental Press J Orthod"},{"key":"ref16","doi-asserted-by":"crossref","DOI":"10.1111\/j.1600-0501.2010.02092.x","article-title":"Assessment of mini-implant displacement using cone beam computed tomography","author":"Alves Jr M","year":"2011","journal-title":"Clin Oral Impl Res"},{"key":"ref17","doi-asserted-by":"crossref","first-page":"41","DOI":"10.1016\/0002-9416(70)90127-2","article-title":"Skeletal and dental changes accompanying rapid midpalatal suture opening","volume":"58","author":"Wertz R","year":"1970","journal-title":"Am J Orthod Dentofacial Orthop","ISSN":"https:\/\/id.crossref.org\/issn\/0889-5406","issn-type":"print"},{"key":"ref18","first-page":"7","article-title":"A prospective study of the short-term treatment effects of the acrylic-splint rapid maxillary expander combined with the lower Schwarz appliance","volume":"75","author":"Wendling LK","year":"2005","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref19","series-title":"An atlas of craniofacial growth: cephalometric standards from the University School Growth Study","author":"Riolo ML","year":"1974"},{"key":"ref20","first-page":"75","article-title":"Vertical growth versus anteroposterior growth as related to function and treatment","volume":"34","author":"Schudy FF","year":"1964","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref21","doi-asserted-by":"crossref","first-page":"442","DOI":"10.2319\/0003-3219(2007)077[0442:LEORME]2.0.CO;2","article-title":"Longitudinal effects of rapid maxillary expansion","volume":"77","author":"Garib DG","year":"2007","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref22","doi-asserted-by":"crossref","first-page":"230","DOI":"10.2319\/040309-192.1","article-title":"Changes in occlusal relationships in mixed dentition patients treated with rapid maxillary expansion","volume":"80","author":"McNamara JA","year":"2010","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref23","first-page":"745","article-title":"Spontaneous correction of Class II malocclusion after rapid palatal expansion","volume":"73","author":"Lima Filho RMA","year":"2003","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"},{"key":"ref24","doi-asserted-by":"crossref","first-page":"77","DOI":"10.2319\/010706-5R.1","article-title":"Condylar asymmetry in bilateral posterior crossbite patients","volume":"77","author":"Kiki A","year":"2007","journal-title":"Angle Orthod","ISSN":"https:\/\/id.crossref.org\/issn\/0003-3219","issn-type":"print"}],"container-title":["Brazilian Dental Journal"],"original-title":[],"link":[{"URL":"http:\/\/www.scielo.br\/pdf\/bdj\/v22n5\/v22n05a14.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2017,5,26]],"date-time":"2017-05-26T20:51:23Z","timestamp":1495831883000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.scielo.br\/scielo.php?script=sci_arttext&pid=S0103-64402011000500014&lng=en&tlng=en"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2011]]},"references-count":24,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2011]]}},"alternative-id":["S0103-64402011000500014"],"URL":"https:\/\/doi.org\/10.1590\/s0103-64402011000500014","relation":{},"ISSN":["0103-6440"],"issn-type":[{"value":"0103-6440","type":"electronic"}],"subject":[],"published":{"date-parts":[[2011]]}}}