The Influence of Different Obturation Systems on the Fracture Resistance of Endodontically Treated Roots. An in Vitro Study

This study aimed to compare the fracture resistance of endodontically treated roots filled by different obturation systems. Material and methods: Ninety-six upper central incisors were used and decoronated, retaining 12 mm of the roots. On the basis of obturation systems, the roots were divided into 4 groups (n=24): Group1 (COGR): control group (unprepared, unfilled), Group 2 (AVGR): ActiV GP points/ActiV GP sealer, Group3 (GPGR): Gutta percha points/AH plus sealer, and Group4 (GAGR): Gutta percha points/ActiV GP sealer. The last three groups were obturated with the single cone technique. The roots were then stored in 100% relative humidity at 37 °C for 2 weeks. A vertical compressive force was exerted with a universal testing machine until a fracture occurred. Data were statistically analyzed with one-way ANOVA. Results: Mean (SD) failure loads for groups ranged from 920.51 ± 210.37 to 1113.44 ± 489.42 N. The fracture resistance between the different study groups indicated no statistical difference. Conclusions: ActiV GP system did not exert a significant effect on the fracture resistance of endodontically treated teeth

The Influence of Different Obturation Systems on the Fracture Resistance of Endodontically Treated Roots. An in Vitro Study

This study aimed to compare the fracture resistance of endodontically treated roots filled by different obturation systems. Material and methods: Ninety-six upper central incisors were used and decoronated, retaining 12 mm of the roots. On the basis of obturation systems, the roots were divided into 4 groups (n=24): Group1 (COGR): control group (unprepared, unfilled), Group 2 (AVGR): ActiV GP points/ActiV GP sealer, Group3 (GPGR): Gutta percha points/AH plus sealer, and Group4 (GAGR): Gutta percha points/ActiV GP sealer. The last three groups were obturated with the single cone technique. The roots were then stored in 100% relative humidity at 37 °C for 2 weeks. A vertical compressive force was exerted with a universal testing machine until a fracture occurred. Data were statistically analyzed with one-way ANOVA. Results: Mean (SD) failure loads for groups ranged from 920.51 ± 210.37 to 1113.44 ± 489.42 N. The fracture resistance between the different study groups indicated no statistical difference. Conclusions: ActiV GP system did not exert a significant effect on the fracture resistance of endodontically treated teeth

Evaluation of apical sealing ability of ActiV GP/glass ionomer sealer as a root filling material

Introduction: The aim of this in vitro study was to assess the sealing ability of ActiV GP/glass ionomer sealer and to compare it with sealing ability of Resilon/Real Seal and gutta-percha/AH Plus. Materials and Methods: Forty-five human mandibular premolars were randomly divided into three groups (15 canals each). Each canal was instrumented to a size 40, taper 6% using K3 NiTi rotary instruments. A smear layer was removed, and the teeth were filled using single cone technique with ActiV GP, Resilon/Real Seal, or lateral condensation with gutta-percha/AH Plus. The teeth then were immersed in 2% methylene blue solution for 24 h, longitudinally sectioned and examined under a stereomicroscope to evaluate the liner leakage of the dye in each group. The data were analyzed with descriptive statistical methods and Mann–Whitney test (P = 0.05). Results: The lowest mean of leakage was recorded in gutta-percha/AH Plus group. There was a statistically significant difference between gutta-percha/AH Plus group and the two other groups; ActiV GP group and Resilon group. Conclusion: Dye penetration examination showed that ActiV GP/GI sealer had weak sealing properties, Resilon/RealSeal system did not show superior sealing properties in comparison with gutta-percha/AH Plus sealer, and lateral condensation shows better sealing properties in comparison with single cone technique