"Estudo comparativo da resistência à infiltração que diferentes materiais resinosos utilizados na cimentação de retentores intra-radiculares oferecem à passagem de fluidos que atravessam a dentina" / Comparative study of the infiltration resistance that different resinous materials used in intra-radicular retainers foundation offer to the fluids passage that cross through the dentine.
AUTOR(ES)
Marcio Katsuyoshi Mukai
DATA DE PUBLICAÇÃO
2005
RESUMO
This study objective is to evaluate in vitro, the resistance that different resinous materials have through the fluids passage cross through the dentine in the absence of radicular cementum. 60 human teeth given by FOUSP bank of teeth were used. The teeth were submitted to endodontic treatment according to Paiva s and Antoniazzi´s technique and stored in a temperature of 37°C in humidity 100% during 24 hours for the preparation of the intra-radicular retainer, respecting the 4 mm apical limit. The intra -radicular retainers were modeled with Duralay resin type and melted with silver league and cemented with the following materials: Zinc Oxiphosfate (SS White), Enforce (Dentsply), Panavia F (Kuraray) and Rely X (3M). After the foundation, a window was delimited in the root cervical area where the cementum was removed with a diamond drill. The external part of the root was made waterproof with etile cyanocrylate and cosmetic enamel for subsequent immersion in a 1% blue methylen solution for 48 hours. Elapsed this period, the waterproof layer was removed, the teeth were consumed in the mesio-distal direction and appraised with the Imagelab software. The impregnated area by the tracer agent of the in the film of the cements comparison, in the cervical and medium thirds, revealed significant statistical differences (p <0,01) of Panavia F (Kuraray) in relation to the other three materials, demonstrating the superiority of that material in relationship to the radicular chanal waterproofing system. Its possible to conclude that among the appraised materials, the Panavia F (Kuraray) cement presented significant statistical difference, in the cervical segment as well as the medium third.
ASSUNTO(S)
cimentação prótese parcial fixa cementation endodontia endodontics permeabilidade da dentina dentin permeability fixed partial denture
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