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Out of 386 records, 108 patients met the inclusion criteria: non-syndromic cleft of the alveolus with or without palate (CL\/P), at least one clear panoramic x-ray, sufficient dental records. Statistical analysis was performed using x-square and binominal test (p\u2009\u2264\u20090.05).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Hypodontia was more frequent (54\/50%) than supernumerary teeth (36\/33.3%) and was more common in bilateral clefts of the lip and palate (BCLP) (70.1%) than in unilateral clefts of the lip and palate (UCLP) (51.6%) or clefts of the lip and alveolus (CLA) (34.5%) (p\u2009&lt;&lt;\u20090.001). There was an average of 0.9 missing teeth per patient, thereof the upper lateral incisor was most often affected (23.2%). In contrast, supernumerary teeth were more frequent in CLA (51.7%; p\u2009=\u20090.014) than UCLP (29.0%) and BCLP patients (17.6%).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>The prevalence for numerical dental anomalies was significantly different among the cleft types. Hypodontia significantly increased with the extend of the cleft, whereas the prevalence of supernumerary teeth decreased.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12903-021-01420-7","type":"journal-article","created":{"date-parts":[[2021,2,11]],"date-time":"2021-02-11T16:06:56Z","timestamp":1613059616000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Prevalence of hypodontia and supernumerary teeth in a German cleft lip with\/without palate population"],"prefix":"10.1186","volume":"21","author":[{"given":"Liesa Heidi","family":"M\u00f6ller","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Winnie","family":"Pradel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomasz","family":"Gedrange","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ute Ulrike","family":"Botzenhart","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,2,11]]},"reference":[{"key":"1420_CR1","unstructured":"Schumacher G-H, Christ B. 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A need for informed consent of the patients and\/ or its legal guardian was waived off by the ethics committee, due to the retrospective character of the study, the use of pseudonymous data and all investigations performed in accordance to the standards of care and not study related (Ethikkommission an der TU Dresden, Fetscherstr. 74, 01307 Dresden, Deutschland).","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare that they have no competing interests.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"60"}}