Influence the translucence of glass fiber posts and time of photoactivation of a dual cement bond strength to root dentin / INFLUÊNCIA DA TRANSLUCIDEZ DE PINOS DE FIBRA DE VIDRO E TEMPO DE FOTOATIVAÇÃO DE UM CIMENTO DUAL NA RESISTÊNCIA DE UNIÃO À DENTINA RADICULAR
AUTOR(ES)
FELIPE AUGUSTO VILLA
FONTE
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia
DATA DE PUBLICAÇÃO
27/02/2012
RESUMO
The aim of this study was to evaluate in vitro through the push-out test, if the use of opaque glass fiber posts (Exacto Angelus [PO]) and translucent (Exacto Translucent Angelus [PT]), adhesively cemented into the root with dual resin cement (Variolink II - Ivoclar Vivadent) under different polymerization time had an influence on the bond strength in three different root canal thirds. Forty-eight singlerooted extracted human premolars were selected from the Tooth Bank UEPG for research. They had their crowns sectioned to form roots with 15 mm in length. All teeth received endodontic treatment and then were divided into 6 groups (n=8), to receive the cementation according to the type of glass fiber post (opaque vs.translucent) and the time of photoactivation of resin cement (20, 40 and 60 seconds). After storage in water at 37 C for one week, the teeth were embedded in acrylic resin and sectioned perpendicular to its long axis to form discs 1 mm thick, with two discs for each root third, and then were taken to the machine universal testing. The push-out test was performed at a speed of 0.5 mm/min. The data were statistically analyzed by ANOVA and Tukey s test (p = 0.05). The mean values of bond strength (MPa) and standard deviation (SD) for groups in the cervical third, middle and apical regions were: PO20 - 21.02 3.52, 15.83 4.94 and 5.20 10:48; PO40 - 14.42 3.98, 12.12 4.40 and 11.59 4.89; PO60 - 16.27 7.14, 13.33 5.22 and 16.99 7.82; PT20 - 18.34 5.47, 10.83 4.63 and 9.98 4.76; PT40 - 17.51 6.55, 14.06 3.85 and 10.95 4.65; PT60 - 19.42 5.86, 15.35 5.43 and 12.77 5.93). There were no significant differences between the types of fiber posts used and the different times of polymerization (p>0.05) in relation to the root area were statistically significant differences only between the cervical and the other thirds (p>0.05). It can be concluded that the bond strength of the root canals was not affected by the type of glass fiber post (opaque vs. translucent) and photoactivation time.
ASSUNTO(S)
resin cements resistência de união push-out opacidade translucidez pinos de fibra cimentos resinosos odontologia fiber posts translucency opacity push-out bond strength
ACESSO AO ARTIGO
http://www.bicen-tede.uepg.br/tde_busca/arquivo.php?codArquivo=792Documentos Relacionados
- Effect of endodontic sealers on the bond strength of glass fiber posts to root dentin
- AvaliaÃÃo da resistÃncia de uniÃo da interface adesiva de pinos de fibra de vidro e a dentina radicular
- EFEITO DA DESINFECÇÃO DE CANAIS PROTÉTICOS NA RESISTÊNCIA ADESIVA DE PINOS DE FIBRA DE VIDRO À DENTINA RADICULAR
- Influence of the operator skill and luting agent on the bond strength of glass fiber post to radicular dentin.
- Influência do condicionamento da dentina na resistência de união de cimento de ionômero de vidro