title: A comparative study of five materials for use in filling root canal spaces.
abstract: The purpose of this study was dual: (1) to test the adaptation of various filling materials to the walls of instrumented root canals and (2) to test which of the experimental materials can be utilized with the pressure syringe. The root canal spaces of 210 extracted permanent anterior teeth were instrumented and, with the pressure syringe, the canals and access cavities were filled with a sealer or cement. Teeth filled with laterally condensed gutta-percha and sealer, and with a silver cone plus laterally condensed gutta-percha and sealer served as the controls. Except for the apical openings, the roots were coated with sticky wax and then placed in methylene blue dye at 37 degrees C. for periods of 1 day, 1 week, and 1 month. The teeth were removed from the dye and sectioned longitudinally, and the length of the dye penetration between the filling and the canal wall was measured. Of all materials tested, the silver point control exhibited the least amount of marginal seepage at each time period. AH-26 exhibited the least amount of marginal seepage after 30 days as compared to the other experimental materials and the gutta-percha control, and was the easiest material to handle of all those tested. Since gutta-percha has been shown to be clinically successful, and since it did not differ significantly in dye seepage from the other materials, all materials tested will give a satisfactory result up to 30 days when used as a root canal sealer under these testing conditions.
mesh_terms: D000180:Acrylic Resins; D003188:Composite Resins; D004853:Epoxy Resins; D008751:Methylene Blue; D010539:Permeability; D011076:Polycarboxylate Cement; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000295:instrumentation; D013194:Staining and Labeling; D013499:Surface Properties; D013594:Syringes; D014092:Tooth Root / Q000378:metabolism; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins; D004853:Epoxy Resins; D011076:Polycarboxylate Cement; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; D008751:Methylene Blue