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Full trisomy 9 is a rare and fatal chromosomal disorder caused by having three copies of chromosome number 9.It can be a viable condition if the trisomic component affects only part of the cells of the body or in cases of partial trisomy of the short arm (trisomy 9p) in which cells have a normal set of two entire chromosomes 9 plus part of a third copy of the short arm ("p") of the chromosome.
Craniosynostosis and dental anomalies (CRSDA, also known as Kreiborg-Pakistani syndrome) is an autosomal recessive syndrome characterized by craniosynostosis, maxillary hypoplasia, and dental anomalies. Dental anomalies seen in this condition include malocclusion, delayed and ectopic tooth eruption, and/or supernumerary teeth.
Turner's hypoplasia or Turner's tooth is a presentation of enamel hypoplasia that normally affects only a single tooth. Its causes can be the same as other forms of enamel hypoplasia, but it is most commonly associated with trauma to a primary maxillary central incisor and the subsequent developmental disturbance of the underlying permanent ...
The genetic material in tetrasomy 9 [5] and trisomy 9p [26] that causes the birth defects is not known. Findings that a) 7 adult cases of tetrasomy 9p were essentially normal [ 27 ] and b) many of the genetically detailed cases of tetrasomy 9p have other chromosome abnormalities [ 26 ] suggest that the role of the cited sSMCs in tetrasomy 9p ...
One of the most common types, pitting enamel hypoplasia (PEH), ranges from small circular pinpricks to larger irregular depressions. [2] Pits also vary in how they occur on a tooth surface, some forming rows and others more randomly scattered. [3] PEH can be associated with other types of hypoplasia, but it is often the only defect observed. [4]
Cartilage hair hypoplasia like syndrome; ... Charcot–Marie–Tooth disease. ... partial monosomy 9p; Chromosome 9, partial trisomy 9p; Chromosome 9, tetrasomy 9p ...
There is usually no exact cause for anodontia. The defect results in the dental lamina obstruction during embryogenesis due to local, systemic and genetic factors. Congenital absence of permanent teeth can present as hypodontia, usually missing one or two permanent teeth, or oligodontia that is the
In mechanical failure of eruption, affected tooth has partial or complete loss of PDL in a panoramic radiograph and teeth distal to affected tooth do not have this condition. [ 6 ] [ 7 ] On a percussion test, a tooth with mechanical failure of eruption will have a dull metallic sound.
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