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A rare genetic dentin dysplasia disease with characteristics of extreme microdontia, oligodontia and abnormal tooth shape (including globular teeth, incisal notches and double tooth formation). Short roots with a variable pulp phenotype (including taurodontia and flame-shaped pulp) enamel hypoplasia and anterior open bite may also be associated. Caused by homozygous mutation in the SMOC2 gene on chromosome 6q27.
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