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Neonatal teeth. Natal teeth are teeth that are present above the gumline (have already erupted) at birth, and neonatal teeth are teeth that emerge through the gingiva during the first month of life (the neonatal period). [1][2] The incidence of neonatal teeth varies considerably, between 1:700 and 1:30,000 depending on the type of study; the ...
Enamel hypoplasia. Enamel hypoplasia is a defect of the teeth in which the enamel is deficient in quantity, [1] caused by defective enamel matrix formation during enamel development, as a result of inherited and acquired systemic condition (s). It can be identified as missing tooth structure and may manifest as pits or grooves in the crown of ...
For human teeth to have a healthy oral environment, all parts of the tooth must develop during appropriate stages of fetal development. Primary (baby) teeth start to form between the sixth and eighth week of prenatal development, and permanent teeth begin to form in the twentieth week. [1] If teeth do not start to develop at or near these times ...
Gunther disease is a congenital form of erythropoietic porphyria. The word porphyria originated from the Greek word porphura. Porphura actually means "purple pigment", which, in suggestion, the color that the body fluid changes when a person has Gunther's disease. [3] It is a rare, autosomal recessive [4] metabolic disorder affecting heme ...
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Cleidocranial dysostosis (CCD), also called cleidocranial dysplasia, is a birth defect that mostly affects the bones and teeth. [1] The collarbones are typically either poorly developed or absent, which allows the shoulders to be brought close together. [1] The front of the skull often does not close until later, and those affected are often ...
The neonatal line is darker and larger than the rest of the striae of retzius. The neonatal line is the demarcation between the enamel formation before birth and after birth i.e., prenatal and postnatal enamel respectively. [1] It is caused by the different physiologic changes at birth and is used to identify enamel formation before and after ...
Carpenter syndrome. Carpenter syndrome, also called acrocephalopolysyndactyly type II, [1] is an extremely rare autosomal recessive [2] congenital disorder characterized by craniofacial malformations, obesity, syndactyly, and polydactyly. [2] Acrocephalopolysyndactyly is a variation of acrocephalosyndactyly that presents with polydactyly.