{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T09:43:21Z","timestamp":1783763001470,"version":"3.55.0"},"reference-count":26,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2024,2,14]],"date-time":"2024-02-14T00:00:00Z","timestamp":1707868800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2024,2,14]],"date-time":"2024-02-14T00:00:00Z","timestamp":1707868800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["BMC Oral Health"],"abstract":"<jats:title>Abstract<\/jats:title><jats:sec>\n                <jats:title>Introduction<\/jats:title>\n                <jats:p>Despite the popularity of clear aligners, their predictability has not been assessed adequately. Moreover, no study has investigated their effects on numerous dentomaxillary variables. Therefore, this study was conducted for the first time, assessing several new or controversial items. The aim of the study was to evaluate the effects of clear aligners on the vertical position of the molar teeth and the vertical and sagittal relationships of the face.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>This preliminary retrospective before-after non-randomized clinical trial was performed on 168 observations of 84 patients (33.60\u00b19.28 years, 54 females) treated with 0.75mm Invisalign appliances. Pretreatment and posttreatment values were measured for: mandibular plane angle, occlusal plane angle, Y-Axis, ANB, facial angle, lower anterior facial height, overbite, and the distances of the molars from the palate and mandibular plane were measured. The alterations in parameters caused by treatment (delta values) were calculated for each measurement. Effects of treatment and some parameters on delta values were analyzed statistically (\u03b1=0.05).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Mean\u00b1SD of \u0394MP-FH, \u0394OP-FH, \u0394Y-Axis, \u0394LAFH, \u0394NPog-FH, \u0394ANB, \u0394Overbite, \u0394SNB, \u03946-PP, \u03947-PP, \u03946-MP, and \u03947-MP were respectively 0.11\u00b11.61, 0.80\u00b11.56, 0.15\u00b11.18, 0.07\u00b10.91, -0.22\u00b11.25, 0.03\u00b10.62, 0.04\u00b11.15, -0.06\u00b11.14, -0.36\u00b10.94, -0.32\u00b11.14, 0.19\u00b10.96, 0.18\u00b11.10. Only the alterations in OP-FH, 6-PP, and 7-PP were significant (<jats:italic>P<\/jats:italic>\u22640.011). Age, sex, treatment duration, or pretreatment mandibular plane angle were not correlated with any delta values. However, the pretreatment occlusal plane angle was negatively correlated with \u0394OP-FH and \u0394Y-Axis. Crowding was correlated negatively with \u0394OP-FH and \u0394Y-Axis and positively with \u0394NPog-FH. Overjet was negatively correlated with \u0394ANB and \u0394Overbite (<jats:italic>P<\/jats:italic>\u22640.035).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Invisalign intruded first\/second maxillary molars and increased the occlusal plane angle. Age, sex, and treatment duration were not correlated with post-treatment anatomic alterations.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12903-024-03972-w","type":"journal-article","created":{"date-parts":[[2024,2,14]],"date-time":"2024-02-14T03:02:59Z","timestamp":1707879779000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Effects of clear aligners on the vertical position of the molar teeth and the vertical and sagittal relationships of the face: a preliminary retrospective before-after clinical trial"],"prefix":"10.1186","volume":"24","author":[{"given":"Mehrnaz","family":"Moradinejad","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ricky E.","family":"Harrell","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sayed Mohammad","family":"Mousavi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Minoo","family":"Alavi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alireza Darvish","family":"Basseri","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arman","family":"Feiz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hanie","family":"Daryanavard","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vahid","family":"Rakhshan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,2,14]]},"reference":[{"issue":"6","key":"3972_CR1","doi-asserted-by":"publisher","first-page":"793","DOI":"10.1016\/j.ajodo.2022.07.019","volume":"163","author":"N Shahabuddin","year":"2023","unstructured":"Shahabuddin N, Kang J, Jeon HH. 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Therefore, the research ethics were approved in accordance with the Helsinki declaration in 20\/08\/2022 (proposal number: U-01095, registration number: P.20.8.D.B.902). The study was commenced after the IRB approval. Since this study was carried out on anonymized and retrospectively taken human data, the need for informed consent to participate was waived by the Institutional Review Board of Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran (ethics code: IR.AJUMS.REC.1401.189). The study ethics and its protocol were approved by the Institutional Review Board of Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran (code: IR.AJUMS.REC.1401.189). All methods were performed in accordance with the relevant guidelines and regulations (including the Declaration of Helsinki); all experimental protocols were approved by the Institutional Review Board of Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"NA.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"234"}}