IADR Abstract Archives
Fracture Resistance of Endodontically Treated Roots Restored with Short Fiber-Reinforced Composite, Bulk-Fill Flowable Composite, MTA and Biodentine as Intraorifice Barriers
Objectives: This study aims to evaluate the effect of several materials (glass ionomer cement, composite resin, short fiber-reinforced composite, bulk-fill flowable composite, MTA Angelus, Micro Mega MTA, and Biodentine) as intraorifice barriers on the fracture strength of roots.
Methods: One hundred-thirty five mandibular premolars were decoronated and prepared up to size #40. Following the standardized silicone layer that simulated the periodontal ligament was created; roots were embedded in acyrilic resin. The root canals were filled and randomly divided into two control and seven experimental groups (n=15), as follows: positive control group (the intraorifice barrier cavity was not prepared), negative control group (the intraorifice barrier cavity was prepared, but not filled), intraorifice barrier cavity preparation (3-mm in depth) filled with glass ionomer cement, nano-hybrid composite resin, short fiber-reinforced composite, bulk-fill flowable composite, MTA Angelus, Micro Mega MTA or Biodentine.. The strength test was performed with a universal testing machine using a steel spherical tip with a diameter of 2 mm (perpendicular to the long axis of the tooth) at a constant crosshead speed of 1 mm/min. The data were analyzed using one-way ANOVA and Tukey post-hoc tests.
Results: Nano-hybrid composite, short fiber- reinforced composite, bulk-fill flowable composite and glass ionomer cement increased the fracture strength of the roots compared to the positive and negative control groups (P < 0.05). While MTA groups did not increase the fracture strength of the roots compared to the control groups, Biodentine increased significantly.
Conclusions: Within the limitations of the present study, the use of short fiber-reinforced composite, and bulk-fill flowable composite have not additional advantage over the composite resin in terms of reinforcing roots. MTA placement (MTA Angelus or Micro Mega MTA) as an intraorifice barrier did not significantly increase the fracture resistance of endodontically treated roots compared to the control groups, however, Biodentine did.
Methods: One hundred-thirty five mandibular premolars were decoronated and prepared up to size #40. Following the standardized silicone layer that simulated the periodontal ligament was created; roots were embedded in acyrilic resin. The root canals were filled and randomly divided into two control and seven experimental groups (n=15), as follows: positive control group (the intraorifice barrier cavity was not prepared), negative control group (the intraorifice barrier cavity was prepared, but not filled), intraorifice barrier cavity preparation (3-mm in depth) filled with glass ionomer cement, nano-hybrid composite resin, short fiber-reinforced composite, bulk-fill flowable composite, MTA Angelus, Micro Mega MTA or Biodentine.. The strength test was performed with a universal testing machine using a steel spherical tip with a diameter of 2 mm (perpendicular to the long axis of the tooth) at a constant crosshead speed of 1 mm/min. The data were analyzed using one-way ANOVA and Tukey post-hoc tests.
Results: Nano-hybrid composite, short fiber- reinforced composite, bulk-fill flowable composite and glass ionomer cement increased the fracture strength of the roots compared to the positive and negative control groups (P < 0.05). While MTA groups did not increase the fracture strength of the roots compared to the control groups, Biodentine increased significantly.
Conclusions: Within the limitations of the present study, the use of short fiber-reinforced composite, and bulk-fill flowable composite have not additional advantage over the composite resin in terms of reinforcing roots. MTA placement (MTA Angelus or Micro Mega MTA) as an intraorifice barrier did not significantly increase the fracture resistance of endodontically treated roots compared to the control groups, however, Biodentine did.