Root length, crown height, and root morphology in Turner syndrome

• Published in: Acta odontologica Scandinavica Vol. 52; no. 5; p. 303
• Main Authors: Midtbø, M, Halse, A
• Format: Journal Article
• Language: English
• Published: England 1994
• Subjects: Adolescent; Bicuspid - abnormalities; Bicuspid - diagnostic imaging; Bicuspid - pathology; Child; Cuspid - diagnostic imaging; Cuspid - pathology; Dental Pulp Cavity - abnormalities; Dental Pulp Cavity - diagnostic imaging; Female; Humans; Incisor - diagnostic imaging; Incisor - pathology; Karyotyping; Mandible; Maxilla; Molar - diagnostic imaging; Molar - pathology; Mosaicism - genetics; Mosaicism - pathology; Odontometry; Radiography, Panoramic; Tooth - diagnostic imaging; Tooth - pathology; Tooth Root - abnormalities; Tooth Root - diagnostic imaging; Tooth Root - pathology; Turner Syndrome - diagnostic imaging; Turner Syndrome - genetics; Turner Syndrome - pathology; X Chromosome - genetics
• ISSN: 0001-6357
• DOI: 10.3109/00016359409029043

Root length, crown height, and root morphology were studied on intraoral and panoramic radiographs in 33 Turner syndrome patients aged 7.0-16.7 years, subdivided on the basis of karyotype. Thirty-three normal girls aged 10.2-16.4 years served as controls. In the 45X patients and, with the exception of a few teeth, also in the isochromosome and mosaic karyotypes, root length and crown height of incisors, canines, and premolars were significantly reduced. Some teeth showed altered crown-root proportions. Maxillary first premolars showed a significantly increased number of two-rooted and three-rooted variants. Mandibular premolars and molars had a complex root morphology, and a classification system was established including four premolar and six molar root types. Premolars had a significantly increased number of root components. Some of the variants, such as a molar-like second premolar, are apparently specific for these patients. On several first molars a radix entomolaris was identified. Two separate mesial and one or two separate distal roots were also frequently seen. Our investigation demonstrates that X-chromosome deficiency influences root formation.