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单词 permanent teeth
释义
permanent teeth

Biology
  • The second and final set of teeth that mammals produce after shedding the deciduous teeth. An adult human normally has 32 permanent teeth, consisting of incisors, canines, molars, and premolars (see illustration). These usually appear between the ages of approximately 6 and 21 years. See also dental formula; diphyodont.

    permanent teeth

    Permanent teeth of an adult human


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