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Pyramidal and Taurodont Molars and Their Association With Other Tooth Anomalies

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Purpose: Determine the prevalence of pyramidal molars (PMs), associated tooth anomalies, and medical conditions (MC). Methods: Pantomograms from 10,168 subjects were searched for PMs. Results: A total of 148 individuals (75.7 percent females), aged 9.7 to 18.9 years old, had PMs. Subjects with MCs (53.4 percent) had on average 17 percent more PMs (P=.0476) and 2.8 times greater odds of palatally displaced canines (P=.0309). The mean number of pyramidal and taurodont molars per subject was 2.9±1.4 (SD) and 3.1±1.7 (SD), respectively. In both sexes, 63.5 percent of all observed PMs were located in the maxilla and 78.5 percent of all PMs were second molars. Taurodont molars increased by 9.4 percent as other tooth anomalies increased by one, but decreased by 8.2 percent for each additional PM. Tooth anomalies associated with PMs were palatally displaced canines (17.6 percent) and short root anomaly of maxillary central incisors (6.1 percent). Delayed eruption was noted in 9.5 percent, tooth agenesis in 6.1 percent, and supernumerary teeth in 3.4 percent. Conclusions: The prevalence of pyramidal molars was 1.4 percent, and the female-to-male ratio was 3.1 to one. Pyramidal molars are often associated with medical conditions and other tooth anomalies.
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Keywords: IMPACTED CANINES; PYRAMIDAL MOLARS; SHORT ROOT ANOMALY; TAURODONTISM

Document Type: Research Article

Affiliations: 1: Professor and chair, Department of Pediatric Dentistry, Children's Hospital Colorado, University of Colorado School of Dental Medicine, Aurora, in Colorado, USA;, Email: [email protected] 2: Pediatric dentist in private practice, Englewood, in Colorado, USA 3: Graduate research assistant, Center for Genes, Environment and Health, National Jewish Health, Denver, in Colorado, USA 4: Research instructor and assistant director, Department of Biostatistics and Informatics, University of Colorado School of Public Health, Aurora, in Colorado, USA 5: IT analyst, Department of Pediatric Dentistry, Children's Hospital Colorado, in Colorado, USA

Publication date: January 1, 2017

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  • Pediatric Dentistry is the official publication of the American Academy of Pediatric Dentistry, the American Board of Pediatric Dentistry and the College of Diplomates of the American Board of Pediatric Dentistry. It is published bi-monthly and is internationally recognized as the leading journal in the area of pediatric dentistry. The journal promotes the practice, education and research specifically related to the specialty of pediatric dentistry. This peer-reviewed journal features scientific articles, case reports and abstracts of current pediatric dental research.
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