Results 171 to 180 of about 10,357 (213)
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Tooth agenesis in down syndrome
American Journal of Medical Genetics, 1995AbstractWe studied the frequency and pattern of tooth agenesis in a Danish population with Down syndrome, trisomy 21 (46 females and 54 males). The control group consisted of a normal Danish population (2424 females and 2431 males) [Rølling, 1980: Scand J Dent Res 88:365–369; Ravn and Nielsen, 1973: Tandlaægebladet 77:12–22].
B G, Russell, I, Kjaer
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Tooth agenesis in a Portuguese population
International Orthodontics, 2012The aim of this retrospective study was to evaluate the prevalence and pattern of hypodontia in the permanent dentition, including and excluding third molars, in a Portuguese sample.The study group comprised 2888 patients, observed between 2005 and 2009 at the Dentistry Clinic of the Instituto Superior de Ciências de Saúde-Norte (ISCSN, Portugal).
Ana, González-Allo +4 more
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Consecutive tooth agenesis patterns in non-syndromic oligodontia
Odontology, 2021Agenesis of two or more consecutive adjacent permanent teeth (consecutive tooth agenesis, CTA) is a serious manifestation of oligodontia requiring long-term, multi-disciplinary treatment. Therefore, the present study investigated the characteristics of the CTA pattern in orthodontic patients with non-syndromic oligodontia.
Ryuichi Baba, Ayaka Sato, Kazuhito Arai
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Genetic basis of tooth agenesis
Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2009AbstractTooth agenesis or hypodontia, failure to develop all normally developing teeth, is one of the most common developmental anomalies in man. Common forms, including third molar agenesis and hypodontia of one or more of the incisors and premolars, constitute the great majority of cases.
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Dental anomaly patterns associated with tooth agenesis
Acta Odontologica Scandinavica, 2017The objective of this study is to evaluate the relationship between tooth agenesis and the occurrence of other dental anomalies in children and adolescents.Panoramic radiographs of 195 subjects with tooth agenesis, except for the third molar, were retrospectively examined and compared with a non-agenesis control group of 600 subjects. Their ages ranged
Su Ji, Choi, Je Woo, Lee, Ji Hyun, Song
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Tooth Agenesis: from Molecular Genetics to Molecular Dentistry
Journal of Dental Research, 2008Tooth agenesis may originate from either genetic or environmental factors. Genetically determined hypodontic disorders appear as isolated features or as part of a syndrome. Msx1, Pax9, and Axin2 are involved in non-syndromic hypodontia, while genes such as Shh, Pitx2, Irf6, and p63 are considered to participate in syndromic genetic disorders, which ...
Matalova, E +3 more
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Relationship between tooth size and third molar agenesis
European Journal of Oral Sciences, 1974ABSTRACT – The hypothesis that third molar agenesis influences crown size of other permanent teeth was tested on a random sample of 300 children in the age group 14–16 years. The individuals were divided into four groups: Group A, full complement of teeth; B, a‐genesis of one or more third molars; C, agenesis of one or more third molars combined with ...
H C, Christensen, B, Melsen
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AXIN2, Tooth Agenesis, and Colorectal Cancer
2008Abstract Mutations in the human AXIN2 gene cause dominantly inherited tooth agenesis with severe but variable phenotype. At the same time, they predispose to colorectal cancer. The role of AXIN2 as a regulator of Wnt (wingless)-signaling is in line with the well-established role of deregulated β-catenin activity in promoting colon cancer.
Pekka Nieminen +2 more
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Novel PAX9 Mutations Cause Non-syndromic Tooth Agenesis
Journal of Dental Research, 2014PAX9 is a transcription factor expressed in the tooth mesenchyme during tooth morphogenesis. In Pax9-null mice, tooth development is arrested at the bud stage. In humans, heterozygous mutations in PAX9 have been associated with non-syndromic tooth agenesis, predominantly in the molars.
S N, Mitsui +6 more
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Defining Subphenotypes for Tooth Agenesis: Does Side Matter?
Journal of Clinical Pediatric Dentistry, 2009Objectives: The etiology of tooth agenesis is still poorly understood. The identification of sub-populations with specific types of hypodontia (subphenotypes) would allow testing the specific hypothesis that certain genetic factors contribute to the specific subphenotype. The aim of this work was assessing a large cohort to verify if preferential tooth
Marcelo de Castro, Costa +4 more
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