Effect of different intraorifice barriers on the fracture resistance of roots obturated with Resilon or gutta-percha.
J Endod
; 36(6): 1061-3, 2010 Jun.
Article
en En
| MEDLINE
| ID: mdl-20478466
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.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Materiales de Obturación del Conducto Radicular
/
Fracturas de los Dientes
/
Raíz del Diente
/
Cavidad Pulpar
/
Gutapercha
Límite:
Humans
Idioma:
En
Año:
2010
Tipo del documento:
Article