#crown.top  the enamel covered part of a tooth above the gum
  supertype:  top  the upper part of anything; "the mower cuts off the tops of the grass"; "the title should be written at the top of the first page"
  subtype:  jacket_crown  (dentistry) an artificial crown fitted over a broken or decayed tooth
  part:  tooth_enamel
  part of:  tooth  hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense

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