Akademik Veri Yönetim Sistemi
JOURNAL OF ENDODONTICS, cilt.42, sa.11, ss.1673-1676, 2016 (SCI-Expanded)
Introduction: The purpose of this study was to investigate the fracture resistance of roots by using intraorifice barriers with glass fiber incorporated ProRoot MTA and Biodentine. Methods: The diametral tensile strength and compressive strength of ProRoot MTA and Biodentine were determined after incorporation of 5 wt% and 10 wt% alkali resistant (AR) glass fiber powder into both cements. On the basis of higher diametral tensile strength and compressive strength values, ProRoot MTA and Biodentine with 5 wt% AR glass fiber were selected for further testing as intraorifice barriers. The 14-mm-long root specimens obtained from extracted mandibular premolars (n = 60) were prepared with nickel-titanium rotary files and obturated with guttapercha + AH Plus sealer. After removal of coronal 3 mm of root fillings, the roots were grouped with respect to the intraorifice barrier material (n = 12/group): (1) ProRoot MTA, (2) ProRoot MTA with 5 wt % AR glass fibers, (3) Biodentine, (4) Biodentine with 5 wt% AR glass fibers, and (5) control (no intraorifice barrier). The specimens were loaded vertically at 1 mm/min crosshead speed until vertical root fracture occurred. The data were evaluated statistically by. using 2-way analysis of variance and Tukey tests. Results: Both incorporation of glass fiber and the type of material significantly affected fracture resistance (both P=.002). Roots with glass fiber reinforced Biodentine barriers showed the highest fracture strength (P =.0,00). Conclusions: Incorporation of 5 wt% AR glass fiber can significantly improve the reinforcement effect of Pro Root MTA and Biodentine when used as intraorifice barriers. (J Endod 2016;42:1673-1676)