Reforço intra-radicular de raizes debilitadas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

The aim of this study was to evaluate the fracture resistance of seventy inferior bovine incisors, weakened and restored with different intra-root retention systems: cast post and core; cast post and core with composite resin reinforcement; Flexi-Post; Flexi-Post with polyethylene fiber - Ribbond; Luscent Anchors post; and intra-root retention with Ribbond. Specimens were restored with metallic crowns, with no ferrule effect. Fracture resistance testing was carried out in an Instron Universal Testing Machine at a crosshead speed of 0.5 mm/min. Results were analyzed by one-way ANOVA and Tukey test at the 5% level of significance, which revealed that the group of non-weakened roots restored with the cast post and core presented the highest fracture strength means. However, it presented no significant differences from the group of weakened roots restored with cast post and core; from the group of weakened roots restored with cast post and core and composite resin reinforcement; and from the group of weakened roots filled with resin cement and Flexi-Post. The lowest fracture resistance means were found for the group of weakened roots filled with resin cement and polyethylene fibers - Ribbond. Based on the present study, it can be concludedthat dental structure preservation is the main factor that contributes for root fracture resistance. Composite resin was able to reinforce the dental remnant and intra-root retention systems adaptation to canal walls contributed for the increase in fracture strength of weakened roots

ASSUNTO(S)

restauração (odontologia) resinas dentarias materiais dentarios

ACESSO AO ARTIGO

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