{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,16]],"date-time":"2025-10-16T20:51:10Z","timestamp":1760647870321,"version":"3.37.3"},"reference-count":16,"publisher":"Springer Science and Business Media LLC","issue":"5","license":[{"start":{"date-parts":[[2023,8,24]],"date-time":"2023-08-24T00:00:00Z","timestamp":1692835200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2023,8,24]],"date-time":"2023-08-24T00:00:00Z","timestamp":1692835200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Royal Library, Copenhagen University Library"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Eur Arch Paediatr Dent"],"published-print":{"date-parts":[[2023,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec>\n                <jats:title>Aim<\/jats:title>\n                <jats:p>The aim of this case series study is to describe where the crowns of the permanent mandibular canines are located in early childhood in relation to the preceding primary canines.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Materials and methods<\/jats:title>\n                <jats:p>From a sample of 31 orthopantomograms from children, younger than 5\u00a0years of age, the location of the mandibular canines was analysed by visual inspection. The radiographs were taken due to different deviations in the dentition and forwarded during a period of 28\u00a0years for elucidating different diagnostic questions. From an embryological point of view, the primary canine was considered as a stable structure in the jawbone. A longitudinal axis through the primary canine was named the <jats:italic>canine axis.<\/jats:italic> The initial site of the permanent crown was the site, where the permanent lamina \u201cplaced\u201d the tooth bud for final development. A normal site was determined when the <jats:italic>canine axis<\/jats:italic> passed though the permanent crown and a pathological site was determined when this did not happen.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Normal sites for the permanent crowns were observed in 19 cases and abnormal sites in 8 cases. In four cases, the interrelationship between the <jats:italic>canine axis<\/jats:italic> and the permanent crown could not be decided. The study demonstrated that the tooth germ for the permanent canine can start initial formation misplaced distally or mesially to the preceding primary tooth.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>The study demonstrates different malpositions of the initial crowns of the permanent mandibular canines in children younger than 5\u00a0years of age. The results are considered of importance for future understanding of the aetiology behind ectopic mandibular canines.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s40368-023-00825-y","type":"journal-article","created":{"date-parts":[[2023,8,24]],"date-time":"2023-08-24T05:01:54Z","timestamp":1692853314000},"page":"613-619","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["The location of the permanent mandibular canine as identified in orthopantomograms from children younger than 5 years of age: a case series study"],"prefix":"10.1007","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3742-1442","authenticated-orcid":false,"given":"I.","family":"Kj\u00e6r","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Svanholt","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P.","family":"Svanholt","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2023,8,24]]},"reference":[{"key":"825_CR1","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1093\/ejo\/5.1.1","volume":"5","author":"A Bj\u00f6rk","year":"1983","unstructured":"Bj\u00f6rk A, Skieller V. Normal and abnormal growth of the mandible. A synthesis of longitudinal cephalic implant studies over a period of 25 years. Eur J Orthod. 1983;5:1\u201346.","journal-title":"Eur J Orthod"},{"key":"825_CR2","first-page":"12","volume":"71","author":"MR Joshi","year":"2001","unstructured":"Joshi MR. Transmigrant mandibular canines: a record of 28 cases and a retrospective review of the literature. Angle Orthod. 2001;71:12\u201322.","journal-title":"Angle Orthod"},{"key":"825_CR3","doi-asserted-by":"publisher","first-page":"606","DOI":"10.1159\/000144538","volume":"93","author":"I Kj\u00e6r","year":"1975","unstructured":"Kj\u00e6r I. Histochemical investigations on the symphysis menti in the human fetus related to fetal skeletal maturity in the hand and foot. 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