There have been many studies on the calcified bodies in the pulp of the human permanent teeth however, little work has been done to study the calcified bodies in the human deciduous teeth. In the present paper, the result of histological study on the pulp calcified bodies in the human deciduous teeth is reported.
Fifty deciduous molars without dentin caries formed the basis of this investigation. The degree of their root resorption ranged from 1/2 to 3/4, and attrition of their crowns appeared in various degrees. After the decalcification, the teeth were embedded in paraffin, and 6μm sections were prepared for histological examination. The results were as follows:
1) True denticles which had tubular structures with irregular running were found in 7 teeth (14%), and true denticle were scattered multiply in 4 teeth (8%).
2) False denticles which had no tubular structure were found in 14 teeth (28%), and false denticles were scattered multiply in 10 teeth (20%).
3) Diffuse calcified-deposits which were one of the dystrophic calcification were found in 37 teeth (74%).
4) The true denticles demonstrated a constant incidence for all grades of attrition. The false denticles and diffuse c alcified-deposits, on the other hand, showed a high incidence in severe grades of attrition which revealed narrowing pulp cavity and atrophic changes of the pulp tissue in various degrees. The results of the present study suggest that calcified bodies in the pulp of the human deciduous teeth are not indeed rare.