title: Effect of dynamic loading on the integrity of the interface between root canal and obturation materials.
abstract: The purpose of this study was to evaluate the effect of occlusal load on the integrity of root canal obturation. Maxillary anterior teeth were cleaned, shaped, and obturated with either gutta-percha (GP)/AH Plus or Resilon/Epiphany. Afterwards, teeth were placed under 100 N force at 2 Hz for 22 hours in a 37 degrees C water bath. Teeth were sectioned and examined for disruption in the integrity of the obturation by using optical microscopy. The length of the separation between the obturation and the root canal walls was measured and compared statistically. GP and Resilon obturated canals subjected to occlusal load displayed significantly greater interface disruption compared with unloaded controls (p < .05). The results indicate that occlusal load generates separation forces on the obturation interface that might compromise the sealing ability of the obturation.
authors: Department of Endodontics, Baylor College of Dentistry, Texas A&M University System Health Science Center, Dallas, Texas, USA.
authors: Dan
authors: D
authors: Bishop
authors: Jason
authors: J
authors: Griggs
authors: Jianing
authors: J
authors: He
mesh_terms: D001732:Bite Force; D019245:Compressive Strength; D003786:Dental Pulp Cavity / Q000502:physiology; D003799:Dental Stress Analysis; D006171:Gutta-Percha; D006801:Humans; D007180:Incisor; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation; D013718:Tensile Strength
chemical_list: D012387:Root Canal Filling Materials; C486892:resilon sealer; D006171:Gutta-Percha