{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,18]],"date-time":"2026-03-18T18:40:49Z","timestamp":1773859249541,"version":"3.50.1"},"reference-count":35,"publisher":"The Angle Orthodontist (EH Angle Education & Research Foundation)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2010,5]]},"abstract":"<jats:title>Abstract<\/jats:title>\n        <jats:sec>\n          <jats:title>Objective:<\/jats:title>\n          <jats:p>To test the null hypothesis that there is no relationship between infraocclusion and the occurrence of other dental anomalies in subjects selected for clear-cut infraocclusion of one or more deciduous molars.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Materials and Methods:<\/jats:title>\n          <jats:p>The experimental sample consisted of 99 orthodontic patients (43 from Boston, Mass, United States; 56 from Jerusalem, Israel) with at least one deciduous molar in infraocclusion greater than 1 mm vertical discrepancy, measured from the mesial marginal ridge of the first permanent molar. Panoramic radiographs and dental casts were used to determine the presence of other dental anomalies, including agenesis of permanent teeth, microdontia of maxillary lateral incisors, palatally displaced canines (PDC), and distal angulation of the mandibular second premolars (MnP2-DA). Comparative prevalence reference values were utilized and statistical testing was performed using the chi-square test (<jats:italic>P<\/jats:italic> &lt; .05) and odds ratio.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Results:<\/jats:title>\n          <jats:p>The studied dental anomalies showed two to seven times greater prevalence in the infraocclusion samples, compared with reported prevalence in reference samples. In most cases, the infraoccluded deciduous molar exfoliated eventually and the underlying premolar erupted spontaneously. In some severe phenotypes (10%), the infraoccluded deciduous molar was extracted and space was regained to allow uncomplicated eruption of the associated premolar.<\/jats:p>\n        <\/jats:sec>\n        <jats:sec>\n          <jats:title>Conclusion:<\/jats:title>\n          <jats:p>Statistically significant associations were observed between the presence of infraocclusion and the occurrence of tooth agenesis, microdontia of maxillary lateral incisors, PDC, and MnP2-DA. These associations support a hypothesis favoring shared causal genetic factors. Clinically, infraocclusion may be considered an early marker for the development of later appearing dental anomalies, such as tooth agenesis and PDC.<\/jats:p>\n        <\/jats:sec>","DOI":"10.2319\/062609-358.1","type":"journal-article","created":{"date-parts":[[2010,1,5]],"date-time":"2010-01-05T15:19:40Z","timestamp":1262704780000},"page":"440-445","source":"Crossref","is-referenced-by-count":57,"title":["Increased Occurrence of Dental Anomalies Associated with Infraocclusion of Deciduous Molars"],"prefix":"10.2319","volume":"80","author":[{"given":"Miriam","family":"Shalish","sequence":"first","affiliation":[{"name":"Clinical Lecturer, Department of Orthodontics, Hebrew University\u2013Hadassah School of Dental Medicine, Jerusalem, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sheldon","family":"Peck","sequence":"additional","affiliation":[{"name":"Clinical Professor, Department of Developmental Biology, Harvard School of Dental Medicine, Boston, Mass"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Atalia","family":"Wasserstein","sequence":"additional","affiliation":[{"name":"Clinical Instructor, Department of Orthodontics, School of Dental Medicine, Tel-Aviv University, Israel Defense Forces, Tel-Aviv, Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Leena","family":"Peck","sequence":"additional","affiliation":[{"name":"Assistant Clinical Professor, Department of Developmental Biology, Harvard School of Dental Medicine, Boston, Mass"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1164","reference":[{"key":"i0003-3219-80-3-440-b01","series-title":"Dent Cosmos","first-page":"1186","article-title":"Retained deciduous molars.","volume":"71","author":"Bloch-Jorgensen, K.","year":"1929","unstructured":"Bloch-Jorgensen, K.\n          \n          Retained deciduous molars.\n          Dent Cosmos\n          1929. 71:1186\u20131188."},{"key":"i0003-3219-80-3-440-b02","series-title":"Am J Orthod","first-page":"670","article-title":"Etiology and treatment of tooth ankylosis.","volume":"48","author":"Biederman, W.","year":"1962","unstructured":"Biederman, W.\n          \n          Etiology and treatment of tooth ankylosis.\n          Am J Orthod\n          1962. 48:670\u2013684."},{"key":"i0003-3219-80-3-440-b03","series-title":"Angle Orthod","first-page":"927","article-title":"Mandibular growth in subjects with infraoccluded deciduous molars: a superimposition study.","volume":"75","author":"Leonardi, M.","year":"2005","unstructured":"Leonardi, M., P.Armi, T.Baccetti, L.Franchi, and M.Caltabiano. 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