Influence of periodontal ligament simulation on bond strength and fracture resistance of roots restored with fiber posts
J. appl. oral sci
; 22(5): 450-458, Sep-Oct/2014. tab, graf
Article
en En
| LILACS, BBO
| ID: lil-729851
Biblioteca responsable:
BR1.1
ABSTRACT
Objective:
Considering that periodontal ligament simulation may influence the stress distribution over teeth restored with intraradicular retainers, this study aimed to assess the combined effect of mechanical cycling and periodontal ligament simulation on both the bond strength between fiber posts and root dentin and the fracture resistance of teeth restored using glass fiber posts. Material andMethods:
Ninety roots were randomly distributed into 3 groups (n=10) (C-MC control; P-MC polyether; AS-MC addition silicone) to test bond strength and 6 groups (n=10) (C control; P polyether; AS addition silicone, without mechanical cycling, and C-MC, P-MC and AS-MC with mechanical cycling) to test fracture strength, according to the material used to simulate the periodontal ligament. For the bond strength test, fiber posts were cemented, cores were built, mechanical cycling was applied (2×106 cycles, 88 N, 2.2 Hz, and 45º incline), and the teeth cut into 3 slices (2 mm), which were then subjected to the push-out test at 1 mm/min. For the fracture strength test, fiber posts were cemented, cores were built, and half of the groups received mechanical cycling, followed by the compressive strength (45° to the long axis and 1 mm/min) performed on all groups.Results:
Periodontal ligament simulation did not affect the bond strength (p=0.244) between post and dentin. Simulation of periodontal ligament (p=0.153) and application of mechanical cycling (p=0.97) did not affect fracture resistance.Conclusions:
The materials used to simulate the periodontal ligament did not affect fracture or bond strength, therefore periodontal ligament simulation using the tested materials could be considered optional in the conditions of the study. .Palabras clave
Texto completo:
1
Índice:
LILACS
Asunto principal:
Ligamento Periodontal
/
Fracturas de los Dientes
/
Técnica de Perno Muñón
/
Recubrimiento Dental Adhesivo
Límite:
Animals
Idioma:
En
Revista:
J. appl. oral sci
Asunto de la revista:
ODONTOLOGIA
Año:
2014
Tipo del documento:
Article