{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T11:28:05Z","timestamp":1787657285034,"version":"build-2736575974"},"reference-count":57,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[2023,12,21]],"date-time":"2023-12-21T00:00:00Z","timestamp":1703116800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,1,1]]},"abstract":"<jats:title>Summary<\/jats:title>\n               <jats:sec>\n                  <jats:title>Objectives<\/jats:title>\n                  <jats:p>The purpose of this study was to measure the effectiveness of the cervical headgear for distalizing first permanent maxillary molars in relation to hours of use.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>This was a one-centre, prospective, clinical study conducted at the Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece. Participants (N\u2005=\u200526; 17 females, 9 males) were patients with no history of orthodontic treatment, no syndromes or clefts, and Angle\u2019s Class II malocclusion, where the treatment plan included a cervical headgear. They were instructed to wear the appliance for at least 12 h per day. A TheraMon\u00ae microsensor was embedded in the headgear\u2019s strap to objectively measure wear-time. To measure tooth movement, pre- and post-treatment digital models were superimposed, using the palate as a reference area; translation and rotation were measured along three axes. Superimposition and movement measurements were made with the Viewbox 4 software.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>Average treatment time and headgear wear were 130 days and 55 days, respectively, i.e. 10.1 h\/day. During this period, distal movement averaged 1.75 mm with high variability (min 0.2 mm, max 4.5 mm). Distal tipping and rotation had an average of approximately 5 \u00b0C. Cumulative headgear wear was significantly correlated with distal movement (r2 = 0.32, P\u2005&amp;lt;\u2005.002), distal tipping (r2 = 0.27, P\u2005&amp;lt;\u2005.01), and distal rotation around the long axis of the tooth (r2 = 0.20, P\u2005&amp;lt;\u2005.05).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>Compliance is critical for having a successful clinical outcome. Distalization of the molar with a cervical headgear is correlated with the cumulative hours of appliance use, with hours per day being a weaker predictor.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/ejo\/cjad075","type":"journal-article","created":{"date-parts":[[2023,12,22]],"date-time":"2023-12-22T00:32:57Z","timestamp":1703205177000},"source":"Crossref","is-referenced-by-count":2,"title":["Cervical headgear effectiveness in distalizing molars in relation to patient compliance"],"prefix":"10.1093","volume":"46","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3732-950X","authenticated-orcid":false,"given":"Sofia","family":"Gratsia","sequence":"first","affiliation":[{"name":"Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens , Athens , Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alina","family":"Cocos","sequence":"additional","affiliation":[{"name":"Private Practice , Athens , Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heleni","family":"Vastardis","sequence":"additional","affiliation":[{"name":"Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens , Athens , Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Demetrios","family":"Halazonetis","sequence":"additional","affiliation":[{"name":"Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens , Athens , Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2023,12,21]]},"reference":[{"key":"2024011114301920900_CIT0001","first-page":"25","article-title":"The role of the headgear in growth modification","volume-title":"Semin Orthod","author":"Nanda","year":"2006"},{"key":"2024011114301920900_CIT0002","article-title":"The biologic basis of orthodontic therapy","volume-title":"Contemporary 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