#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 of:  #tooth
  part:  #tooth_enamel__toothenamel__enamel  hard white substance covering the crown of a tooth

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