{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T23:33:19Z","timestamp":1791415999012,"version":"4.3.3"},"reference-count":60,"publisher":"The Angle Orthodontist (EH Angle Education & Research Foundation)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,7]]},"abstract":"ABSTRACT<\/jats:title>\n \n Objectives<\/jats:title>\n To evaluate tooth movements during maxillary arch expansion with clear aligner treatment.<\/jats:p>\n <\/jats:sec>\n \n Materials and Methods<\/jats:title>\n \n The study group included 28 subjects (16 females, 12 males, mean age 31.9 \u00b1 5.4 years) collected prospectively from January 2018 to May 2019. Inclusion criteria were European ancestry, posterior transverse discrepancy of 3\u20136 mm, permanent dentition stage, presence of second permanent molars, mild or moderate crowding, and good compliance with aligners. Treatment protocol included nonextraction strategies, application of Invisalign clear aligner system, and no auxiliaries other than Invisalign attachments. Linear and angular measurements were performed before treatment (T1), at the end of treatment (T2), and on final virtual models (T2 ClinCheck). A paired\n t<\/jats:italic>\n -test was used to compare T2-T1 and T2-T2 ClinCheck changes. The level of significance was set at 5%.\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n Statistically significant differences were found for all measurements, except for ones at the upper second molars. The greatest increase in maxillary width was detected at the upper first and second premolars: +3.5 mm for the first premolar and +3.8 mm for the second premolar at T2. Comparison of T2-T1 angular outcomes showed statistically significant changes in the inclinations of all teeth except for the second permanent molars. T2-T2 ClinCheck showed significant differences for both linear and angular measurements for maxillary canines, resulting in poor predictability.<\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n Maxillary arch development revealed a progressive reduction of the expansion rate and buccal tipping in the anterior, lateral, and posterior regions, with the greatest net increase at the first and second premolars. Clinical attention should be paid to maxillary canine movements, and overcorrection should be planned for them during dentoalveolar expansion.<\/jats:p>\n <\/jats:sec>","DOI":"10.2319\/080520-687.1","type":"journal-article","created":{"date-parts":[[2021,2,11]],"date-time":"2021-02-11T11:00:51Z","timestamp":1613041251000},"page":"433-440","source":"Crossref","is-referenced-by-count":90,"title":["Maxillary arch development with Invisalign system:"],"prefix":"10.2319","volume":"91","author":[{"given":"Roberta","family":"Lione","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Valeria","family":"Paoloni","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lorenzo","family":"Bartolommei","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francesca","family":"Gazzani","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simonetta","family":"Meuli","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chiara","family":"Pavoni","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paola","family":"Cozza","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1164","reference":[{"key":"i0003-3219-91-4-433-b01","series-title":"Am J Orthod Dentofacial Orthop","first-page":"464","article-title":"Evaluation of dental arch width and form changes after orthodontic treatment and retention with a new computerized method","volume":"126","author":"Taner","year":"2004","unstructured":"Taner\n TU,\n \n \n Ciger\n S,\n \n \n El\n H,\n \n \n Germe\u00e7\n D,\n \n \n Es\n A.\n \n \n Evaluation of dental arch width and form changes after orthodontic treatment and retention with a new computerized method.\n\t\t\t\t\tAm J Orthod Dentofacial Orthop.\n\t\t\t\t\t2004;\n\t\t\t\t\t126:\n\t\t\t\t\t464\u2013\n\t\t\t\t\t475."},{"key":"i0003-3219-91-4-433-b02","series-title":"J Orthod","first-page":"29","article-title":"A randomized controlled trial comparing the quadhelix and the expansion arch for the correction of crossbite","volume":"32","author":"McNally","year":"2005","unstructured":"McNally\n MR,\n \n \n Spary\n DJ,\n \n \n Rock\n WP.\n \n \n A randomized controlled trial comparing the quadhelix and the expansion arch for the correction of crossbite.\n\t\t\t\t\tJ Orthod.\n\t\t\t\t\t2005;\n\t\t\t\t\t32:\n\t\t\t\t\t29\u2013\n\t\t\t\t\t35."},{"key":"i0003-3219-91-4-433-b03","series-title":"Am J Orthod Dentofacial Orthop","first-page":"340","article-title":"Comparison of mandibular arch changes during alignment and leveling with 2 preadjusted edgewise appliances","volume":"136","author":"Fleming","year":"2009","unstructured":"Fleming\n PS,\n \n \n DiBiase\n AT,\n \n \n Sarri\n G,\n \n \n Lee\n RT.\n \n \n Comparison of mandibular arch changes during alignment and leveling with 2 preadjusted edgewise appliances.\n\t\t\t\t\tAm J Orthod Dentofacial Orthop.\n\t\t\t\t\t2009;\n\t\t\t\t\t136:\n\t\t\t\t\t340\u2013\n\t\t\t\t\t347."},{"key":"i0003-3219-91-4-433-b04","series-title":"Angle Orthod","first-page":"647","article-title":"Evaluation of incisor position and dental transverse dimensional changes using the Damon system","volume":"81","author":"Vajaria","year":"2011","unstructured":"Vajaria\n R,\n \n \n BeGole\n E,\n \n \n Kusnoto\n B,\n \n \n Galang\n MT,\n \n \n Obrez\n A.\n \n \n Evaluation of incisor position and dental transverse dimensional changes using the Damon system.\n\t\t\t\t\tAngle Orthod.\n\t\t\t\t\t2011;\n\t\t\t\t\t81:\n\t\t\t\t\t647\u2013\n\t\t\t\t\t652."},{"key":"i0003-3219-91-4-433-b05","series-title":"Am J Orthod Dentofacial Orthop","first-page":"67","article-title":"Retrospective investigation of the effects and efficiency of self-ligating and conventional brackets","volume":"148","author":"Anand","year":"2015","unstructured":"Anand\n M,\n \n \n Turpin\n DL,\n \n \n Jumani\n KS,\n \n \n Spiekerman\n CF,\n \n \n Huang\n GJ.\n \n \n Retrospective investigation of the effects and efficiency of self-ligating and conventional brackets.\n\t\t\t\t\tAm J Orthod Dentofacial Orthop.\n\t\t\t\t\t2015;\n\t\t\t\t\t148:\n\t\t\t\t\t67\u2013\n\t\t\t\t\t75."},{"key":"i0003-3219-91-4-433-b06","series-title":"Am J Orthod Dentofacial Orthop","first-page":"422","article-title":"de Alba y Levy JA. 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appliances","volume":"136","author":"Fleming","year":"2009","unstructured":"Fleming\n PS,\n \n \n DiBiase\n AT,\n \n \n Sarri\n G,\n \n \n Lee\n RT.\n \n \n Comparison of mandibular arch changes during alignment and leveling with 2 preadjusted edgewise appliances.\n\t\t\t\t\tAm J Orthod Dentofacial Orthop.\n\t\t\t\t\t2009;\n\t\t\t\t\t136:\n\t\t\t\t\t340\u2013\n\t\t\t\t\t347."},{"key":"i0003-3219-91-4-433-b04","series-title":"Angle Orthod","first-page":"647","article-title":"Evaluation of incisor position and dental transverse dimensional changes using the Damon system","volume":"81","author":"Vajaria","year":"2011","unstructured":"Vajaria\n R,\n \n \n BeGole\n E,\n \n \n Kusnoto\n B,\n \n \n Galang\n MT,\n \n \n Obrez\n A.\n \n \n Evaluation of incisor position and dental transverse dimensional changes using the Damon system.\n\t\t\t\t\tAngle Orthod.\n\t\t\t\t\t2011;\n\t\t\t\t\t81:\n\t\t\t\t\t647\u2013\n\t\t\t\t\t652."},{"key":"i0003-3219-91-4-433-b05","series-title":"Am J Orthod 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