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Nonetheless, many are not well assessed worldwide. Moreover, most studies are limited to a few nonmetric traits. Therefore, we aimed to examine several nonmetric dental traits\/anomalies.\n<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>In this cross-sectional epidemiological study,\u2009~\u20099000 permanent teeth of 331 non-syndromic orthodontic patients (radiographs and dental casts) with fully erupted permanent dentitions (except the third molars and some cases of a few teeth missing or excluded) were evaluated by two observers, each twice, in search for 62 nonmetric traits\/shape-number-size anomalies. The traits\/anomalies of interest were supernumerary, microdontia, peg-shaped lateral, shovelings, talon cusps, Carabelli cusps, fifth\/sixth\/seventh cusps on the molars, hypocone\/hypoconulid absence, protostylid, deflecting wrinkle\u200fs, canine mesial ridge, distal trigonid crest, canine distal accessory ridge, accessory cusps in the mesial\/distal marginal ridges, mesial\/distal accessory ridges, and accessory cusps in the lingual of the mandibular premolars and second molars). Data, at both patient\/quarter levels, were analyzed regarding the associated factors (skeletal Angle classes, crowding, sex, and sides) as well as the correlations among traits, using the chi-square test and Spearman correlation coefficient (\u03b1\u2009=\u20090.05).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Prevalence rates of 44 traits\/anomalies were reported (18 out of the 62 searched traits\/anomalies were not found [prevalence\u2009=\u20090%]). Microdontia and accessory cusps on the marginal ridge of the second mandibular molars were significantly more common in women (<jats:italic>P<\/jats:italic>\u2009&lt;\u20090.05). Canine talon cusp and distal trigonid crest of the second mandibular molars were more prevalent in men (<jats:italic>P<\/jats:italic>\u2009&lt;\u20090.05). Shoveling, canine talon cusp, canine distal accessory ridge, and accessory cusp in the first premolar might be more prevalent in skeletal Angle class II; whereas, accessory cusp in the mesial marginal ridge of the second premolar might be rather more prevalent in skeletal Angle class I (<jats:italic>P<\/jats:italic>\u2009&lt;\u20090.05). Few dental traits were positively and moderately or strongly correlated with each other (Spearman Rho\u2009\u2265\u20090.4, <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.0005).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Sex dimorphism was uncommon in nonmetric dental traits\/anomalies. Skeletal malocclusions may be associated with a few dental abnormalities or variations.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12903-022-02481-y","type":"journal-article","created":{"date-parts":[[2022,11,27]],"date-time":"2022-11-27T01:18:52Z","timestamp":1669511932000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Associations between 44 nonmetric permanent dental traits or anomalies with skeletal sagittal malocclusions and sex, besides correlations across the variations or abnormalities"],"prefix":"10.1186","volume":"22","author":[{"given":"Negin","family":"Ashoori","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fataneh","family":"Ghorbanyjavadpour","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9503-3133","authenticated-orcid":false,"given":"Vahid","family":"Rakhshan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,11,26]]},"reference":[{"key":"2481_CR1","doi-asserted-by":"publisher","first-page":"54","DOI":"10.1016\/j.jflm.2017.05.013","volume":"49","author":"NH Felemban","year":"2017","unstructured":"Felemban NH, Manjunatha BS. 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