Effect of Different Intraorifice Barriers on the Fracture Resistance of Roots Obturated with Resilon or Gutta-Percha


Nagas E., Uyanik O., ALTUNDAŞAR E., Durmaz V., ÇEHRELİ Z. C., Vallittu P. K., ...More

JOURNAL OF ENDODONTICS, vol.36, no.6, pp.1061-1063, 2010 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 36 Issue: 6
  • Publication Date: 2010
  • Doi Number: 10.1016/j.joen.2010.03.006
  • Journal Name: JOURNAL OF ENDODONTICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1061-1063
  • Keywords: Fiber-reinforced composite, fracture resistance, intraorifice barrier, mineral trioxide aggregate, resin-modified glass ionomer cement, ENDODONTICALLY TREATED TEETH, CORONAL MICROLEAKAGE, GLASS-IONOMER, IN-VITRO, FILLING MATERIAL, STRENGTH, DENTIN, CANALS, SUSCEPTIBILITY, RESTORATION
  • Hacettepe University Affiliated: Yes

Abstract

Introduction: This study investigated and compared the root reinforcement potential of 3 different intraorifice barriers (mineral trioxide aggregate [MTA], resin-modified glass ionomer cement [Vitremer], and fiber-reinforced composite [FRC]) placed over root canals obturated with gutta-percha or Resilon. Methods: Crowns of 80 extracted human mandibular premolars were sectioned off to obtain 14-mm-long root specimens. After preparation of root canals with nickel-titanium rotary files, the roots were obturated with either the Resilon/Epiphany system or gutta-percha + AH Plus sealer. In both obturation groups, specimens were further subgrouped with respect to the intraorifice barrier material placed after removal of 3-mm coronal portion of the root fillings: (1) MTA, (2) Vitremer, and (3) FRC. The specimens were loaded vertically at 1 mm/min crosshead speed until vertical root fracture occurred. Results were evaluated statistically with two-way analysis of variance and Tukey tests. Results: Fracture resistance of roots was significantly affected by the type of intraorifice barrier (P < .05), but not by the type of obturation system used (P > .05). Conclusions: The use of Vitremer and FRC significantly improved the fracture resistance, whereas MTA did not exhibit any reinforcing effect as an intraorifice barrier. (J Endod 2010;36:1061-1063)