A tooth fragment found in food was investigated morphologically to identify the animal species and tooth kind. After that, the blood group of the material was examinated. The results were as follows: 1) The material was identified as a human permanent tooth based upon the shapes of enamel rods and peritubular matrix in dentin. Although it was closely allied to the upper left molar, the kind of tooth was undistinguishable, because the fragment was too small. 2) It was supposed that the patient would be more than 50 years old according to the heavy attrition, and might be female from its imagined bigness. 3) The blood group of the tooth fragment was judged as AB in the ABO-blood group system.
食品の中から現われた歯牙片の鑑定例
