{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T10:21:39Z","timestamp":1790763699695,"version":"4.1.0"},"reference-count":62,"publisher":"The Angle Orthodontist (EH Angle Education & Research Foundation)","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,9]]},"abstract":"ABSTRACT<\/jats:title>\n \n Objectives<\/jats:title>\n To compare between skeletal and dentoalveolar effects of slow and rapid activation of miniscrew-supported expanders.<\/jats:p>\n <\/jats:sec>\n \n Materials and Methods<\/jats:title>\n A total of 30 patients were randomly allocated to two groups using block randomization and the allocation ratio 1:1. Both groups received maxillary expanders anchored using four miniscrews. Activation protocol was once every other day in the slow expansion (SME) group and twice daily in the rapid expansion (RME) group. Cone-beam computed tomography (CBCT) scans were obtained before expansion and after removal of the expanders. Transverse skeletal and dentoalveolar changes were measured using CBCT.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n A total of 12 patients in the SME group (mean age, 14.30 \u00b1 1.37 years) and 12 patients in the RME group (mean age, 15.07 \u00b1 1.59 years) were analyzed. RME showed significantly greater widening of the mid-palatal suture at the level of first molars (mean difference [SME \u2212 RME] = \u22120.61 mm), and a greater increase in right and left molar buccal inclination (mean difference= \u22123.83\u00b0 and \u22122.03\u00b0, respectively). Percentage of skeletal expansion relative to the jackscrew opening was not significantly different between the groups. Palatal inflammation was evident following appliance removal. Miniscrew mobility and bending were observed with RME.<\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n Both SME and RME were effective in correcting skeletal transverse maxillary deficiency. However, RME resulted in more buccal tipping of maxillary molars and in miniscrew failures and bending.<\/jats:p>\n <\/jats:sec>","DOI":"10.2319\/112121-856.1","type":"journal-article","created":{"date-parts":[[2022,6,30]],"date-time":"2022-06-30T12:04:38Z","timestamp":1656590678000},"page":"579-588","source":"Crossref","is-referenced-by-count":13,"title":["Skeletal and dentoalveolar effects of slow vs rapid activation protocols of miniscrew-supported maxillary expanders in adolescents: A randomized clinical trial"],"prefix":"10.2319","volume":"92","author":[{"given":"Yomna M.","family":"Yacout","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Essam M.","family":"Abdalla","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nadia M.","family":"El Harouny","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1164","reference":[{"issue":"(6)","key":"i1945-7103-92-5-579-b01","series-title":"J Orofac Orthop","first-page":"455","article-title":"Clinical profile of rapid maxillary expansion\u2014outcome of a national inquiry","volume":"66","author":"Korbmacher","year":"2005","unstructured":"Korbmacher\n H,\n \n \n Huck\n L,\n \n \n Merkle\n T,\n \n \n Kahl-Nieke\n B.\n \n \n Clinical profile of rapid maxillary expansion\u2014outcome of a national inquiry.\n\t\t\t\t\tJ Orofac Orthop.\n\t\t\t\t\t2005;66(6):455\u2013468."},{"issue":"(4)","key":"i1945-7103-92-5-579-b02","series-title":"Am J Orthod Dentofacial Orthop","first-page":"428 e1","article-title":"Factors affecting buccal bone changes of maxillary posterior teeth after rapid maxillary expansion","volume":"132","author":"Rungcharassaeng","year":"2007","unstructured":"Rungcharassaeng\n K,\n \n \n Caruso\n JM,\n \n \n Kan\n JY,\n \n 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Organs","first-page":"E41","article-title":"Stresses and strains analysis using different palatal expander appliances in upper jaw and midpalatal suture","volume":"41","author":"Trojan","year":"2017","unstructured":"Trojan\n L,\n \n \n Gonzalez-Torres\n L,\n \n \n Melo\n A,\n \n \n de Las Casas\n E.\n \n \n Stresses and strains analysis using different palatal expander appliances in upper jaw and midpalatal suture.\n\t\t\t\t\tArtif Organs.\n\t\t\t\t\t2017;41(6):E41\u2013E51."},{"issue":"(6)","key":"i1945-7103-92-5-579-b14","series-title":"Am J Orthod Dentofacial Orthop","first-page":"1125","article-title":"Comparison of the treatment effects of different rapid maxillary expansion devices on the maxilla and the mandible. Part 1: evaluation of dentoalveolar changes","volume":"151","author":"Canan","year":"2017","unstructured":"Canan\n S,\n \n \n \u015een\u0131\u015f\u0131k\n NE.\n \n \n Comparison of the treatment effects of different rapid maxillary expansion devices on the maxilla and the mandible. 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inquiry.\n\t\t\t\t\tJ Orofac Orthop.\n\t\t\t\t\t2005;66(6):455\u2013468."},{"issue":"(4)","key":"i1945-7103-92-5-579-b02","series-title":"Am J Orthod Dentofacial Orthop","first-page":"428 e1","article-title":"Factors affecting buccal bone changes of maxillary posterior teeth after rapid maxillary expansion","volume":"132","author":"Rungcharassaeng","year":"2007","unstructured":"Rungcharassaeng\n K,\n \n \n Caruso\n JM,\n \n \n Kan\n JY,\n \n \n Kim\n J,\n \n \n Taylor\n G.\n \n \n Factors affecting buccal bone changes of maxillary posterior teeth after rapid maxillary expansion. \n\t\t\t\t\tAm J Orthod Dentofacial Orthop.\n\t\t\t\t\t2007;132(4):428 e1\u2013e8."},{"issue":"(3)","key":"i1945-7103-92-5-579-b03","series-title":"Angle Orthod","first-page":"488","article-title":"Evaluation of root resorption following rapid maxillary expansion using cone-beam computed tomography","volume":"82","author":"Baysal","year":"2012","unstructured":"Baysal\n A,\n \n \n Karadede\n I,\n \n \n Hekimoglu\n S,\n \n et al.\n \n Evaluation of root resorption following rapid maxillary expansion using cone-beam computed tomography.\n\t\t\t\t\tAngle Orthod.\n\t\t\t\t\t2012;82(3):488\u2013494."},{"issue":"(6)","key":"i1945-7103-92-5-579-b04","series-title":"Am J Orthod Dentofacial Orthop","first-page":"749","article-title":"Periodontal effects of rapid maxillary expansion with tooth-tissue-borne and tooth-borne expanders: a computed tomography evaluation","volume":"129","author":"Garib","year":"2006","unstructured":"Garib\n DG,\n \n \n Henriques\n JF,\n \n \n Janson\n G,\n \n \n de Freitas\n MR,\n \n \n Fernandes\n AY.\n \n \n Periodontal effects of rapid maxillary expansion with tooth-tissue-borne and tooth-borne expanders: a computed tomography evaluation.\n\t\t\t\t\tAm J Orthod Dentofacial Orthop.\n\t\t\t\t\t2006;129(6):749\u2013758."},{"issue":"(3)","key":"i1945-7103-92-5-579-b05","series-title":"Am J Orthod Dentofacial Orthop","first-page":"304.e1","article-title":"Transverse, vertical, and anteroposterior changes from bone-anchored maxillary expansion vs traditional rapid maxillary expansion: a randomized clinical trial","volume":"137","author":"Lagrav\u00e8re","year":"2010","unstructured":"Lagrav\u00e8re\n MO,\n \n \n Carey\n J,\n \n \n Heo\n G,\n \n \n Toogood\n RW,\n \n \n Major\n PW.\n \n \n Transverse, vertical, and anteroposterior changes from bone-anchored maxillary expansion vs traditional rapid maxillary expansion: a randomized clinical trial.\n\t\t\t\t\tAm J Orthod Dentofacial Orthop.\n\t\t\t\t\t2010;137(3):304.e1\u2013e12."},{"issue":"(2)","key":"i1945-7103-92-5-579-b06","series-title":"Angle Orthod","first-page":"253","article-title":"Tooth-borne vs bone-borne rapid maxillary expanders in late adolescence","volume":"85","author":"Lin","year":"2015","unstructured":"Lin\n L,\n \n \n Ahn\n HW,\n \n \n Kim\n SJ,\n \n \n Moon\n SC,\n \n \n Kim\n SH,\n \n \n Nelson\n G.\n \n \n Tooth-borne vs bone-borne rapid maxillary expanders in late 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