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Change of teeth
齿更 〔齒更〕 chǐ gēng
换齿〔換 齒〕huàn chǐ
The replacement of the milk teeth (deciduous) teeth by the permanent teeth at the age of six to seven. Change of teeth is considered a manifestation of kidney qì. When a male is eight years old and his kidney qì is replete, the hair grows and the teeth change.