Resistência de união da interface coping cerâmico pilar de implante variando o agente cimentante antes e após ciclagem térmica / Bond strength of the ceramic coping-implant abutment interface varying luting agent before and after thermal cycling
AUTOR(ES)
Washington dos Reis Leite
FONTE
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia
DATA DE PUBLICAÇÃO
25/10/2010
RESUMO
Objective: The aim of the present study was to evaluate the bond strength of the ceramic coping-abutment implant interface according to the luting agent, before and after thermal cycling. Methods: A total of forty sets of ceramic copings (IPS e.max) and solid pillar 5.5/ regular analogue were divided according to the luting agent (n=10): (OZ) zinc oxide with no eugenol; (ZP) zinc phosphate, (CIV) resin modified glass ionomer, (RES) adhesive resin cement. Tensile bond strength test was performed using a universal testing machine (2000-Versat Panambra) with a speed of 1.0mm/min, before and after thermal cycling. Results were submitted to normality test and then analyzed by ANOVA and Tukey test with significance level of 5%. Results: Prior to thermal cycling, values ranged from 50.77N (OZ) to 240.21N (CIV). No difference was observed between OZ and FZ (60.16N), nor between CIV and RES (230.36N). After thermal cycling, values ranged between 3.5N (OZ) and 330.66N (RES). OZ showed statistically lower mean values compared to the others. RES presented statistically higher mean values in comparison to the other luting agents. FZ (90.58N) and CIV (280.43N) showed intermediate results. Conclusions: Zinc oxide with no eugenol was associated with the worst performance compared to the other agents after thermal cycling. Before thermal cycling the highest mean value was obtained for the glass ionomer. However, after this step, adhesive resin cement showed the highest mean value of bond strength. The sample aging inverted results between ionomer and resin cement, with better mechanical performance for the resin cement.
ASSUNTO(S)
cerâmicas odontológicas resistência à união implantes dentários ceramic coping-implant bond strength dental implant odontologia
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