title: Evaluation of intracytoplasmic particles in histiocytes after endodontic therapy with a hydrophilic plastic.
abstract: The presence of granules within the cytoplasm of periapical tissue histiocytes had been observed in teeth which had a root canal overfilled with a hydrophilic plastic polymer. SEM examinations revealed these granules to be barium sulfate, which was added to the polymer for radiopacity. X-ray spectra revealed strong calcium peaks in bone adjacent to the histiocytes, which showed strong barium peaks. In addition, between the histiocytes and the bone a greater concentration of calcium was seen. Because the histiocytes and not the plastic polymer contained barium sulfate, the evidence for this material's biocompatibility is greatly enhanced.
mesh_terms: D000818:Animals; D001466:Barium Sulfate; D002118:Calcium; D003594:Cytoplasmic Granules / Q000648:ultrastructure*; D000882:Haplorhini; D006644:Histiocytes / Q000648:ultrastructure*; D010486:Periapical Tissue / Q000648:ultrastructure*; D010969:Plastics; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation
chemical_list: D010969:Plastics; D012387:Root Canal Filling Materials; D001466:Barium Sulfate; D002118:Calcium