Taurodontism in 47,XXY Males: An Effect of the Extra X Chromosome on Root Development

Effects of an extra X chromosome on root development were studied in males with a 47, XXY chromosome constitution. Occurrence of taurodontism in the permanent molars of the lower jaw was noted from orthopantomograms of 30 Finnish 47,XXY males, 16 of their first-degree relatives, and a sample of 157...

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Bibliographic Details
Published inJournal of dental research Vol. 67; no. 2; pp. 501 - 502
Main Authors Varrela, J., Alvesalo, L.
Format Journal Article
LanguageEnglish
Published Los Angeles, CA SAGE Publications 01.02.1988
Subjects
Adolescent
Adult
Chi-Square Distribution
Dentistry
Female
Finland
Humans
Klinefelter Syndrome - complications
Male
Mandible
Middle Aged
Mitosis
Molar - abnormalities
Prevalence
Tooth Abnormalities - epidemiology
Tooth Abnormalities - etiology
Tooth Root - abnormalities
Finland
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Summary:Effects of an extra X chromosome on root development were studied in males with a 47, XXY chromosome constitution. Occurrence of taurodontism in the permanent molars of the lower jaw was noted from orthopantomograms of 30 Finnish 47,XXY males, 16 of their first-degree relatives, and a sample of 157 normal males and females. Nine, or 30%, or the 47, XXY males had at least one mandibular molar which was classified as taurodont. Only hypotaurodont teeth were found, and the teeth affected were all either second or third molars. None of the control relatives showed taurodontism. In the population sample, four individuals, or 2.5%, had taurodont teeth. A change in the mitotic activity of the cells of the developing teeth is one possible factor that can affect root formation leading to the development of taurodontism.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0022-0345
1544-0591
DOI:10.1177/00220345880670021401