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Whitish or brownish discolouration, structural '
'anomaly up to tooth malformationSo-called
chalk '
'teeth are the result of impaired enamel formation '
'during tooth development. Both milk teeth and permanent '
'teeth can be affected, in some children and adolescents '
'even both dentitions.
One particular form of '
'this irreversible enamel formation disorder is '
'so-called molar incisor hypomineralisation, or MIH for '
'short, which affects the first molars (molars) and the '
'central front teeth. The upper jaw is statistically '
'more frequently affected than the lower jaw. The '
'changes are usually recognised when the teeth erupt, '
'usually from the age of 6 in the case of permanent '
'teeth.
There are different degrees of severity. '
'90% of all MIH cases show whitish-creamy to '
'yellowish-brownish, opaque discolouration, but with a '
'largely intact structure and unchanged tooth shape. '
'More severe forms are characterised by structural '
'defects (mostly pores) and even slight changes in the '
'shape of the tooth. In rare, very severe cases, there '
'are yellowish-brownish, very pronounced morphological '
'changes in shape and structural collapses.
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