Root length in the permanent teeth of women with an additional X chromosome (47,XXX females)
| Autor: | Raija Lähdesmäki, Lassi Alvesalo |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Adult
Male Adolescent medicine.medical_treatment Aneuploidy Dentistry Trisomy Biology Y chromosome Crown (dentistry) Young Adult stomatognathic system Root length medicine Humans Odontometry Tooth Root Child General Dentistry Sex Chromosome Aberrations X chromosome Retrospective Studies Permanent teeth Analysis of Variance Chromosomes Human X Enamel paint business.industry General Medicine medicine.disease Sexual dimorphism stomatognathic diseases Case-Control Studies visual_art visual_art.visual_art_medium Female business Radiographic Magnification |
| Zdroj: | Acta Odontologica Scandinavica. 68:223-227 |
| ISSN: | 1502-3850 0001-6357 |
| DOI: | 10.3109/00016357.2010.490954 |
| Popis: | Previous studies have demonstrated differential effects of the X and Y chromosomes on dental development. The expression of sexual dimorphism in terms of tooth size, shape, number and developmental timing has been explained especially by Y chromosome influence. The Y chromosome promotes enamel, crown and root dentin development. The X chromosome has an effect on enamel deposition. The aim of this research is to study the influence of the extra X chromosome on the development of permanent tooth root length.The study subjects (all of whom were from the Kvantti Dental Research Project) were seven 47,XXX females, five female relatives and 51 and 52 population control men and women, respectively. Measurements were made from panoramic radiographs on available permanent teeth by a digital calliper according to established procedures.The results showed that the maxillary root lengths of the 47,XXX females were of the same magnitude as those in normal women, but the mandibular root lengths were longer in 47,XXX females than in normal men or women.Increased enamel thickness in the teeth of 47,XXX females is apparently caused by the active enamel gene in all X chromosomes having no increased influence on crown dentin formation. These results in 47,XXX females indicate an increase in root dentin development, at least in the mandible, which together with the data on crown formation reflects a continuous long-lasting effect of the X chromosome on dental development. |
| Databáze: | OpenAIRE |
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