dos Santos Alves Morgan Luís Fernando, Peixoto Rogéli Tiburcio Ribeiro da Cunha, de Castro Albuquerque Rodrigo, Santos Corrêa Maurício Ferrari, de Abreu Poletto Luiz Thadeu, Pinotti Marcos Barbosa
Department of Restorative Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil.
J Endod. 2008 Mar;34(3):299-302. doi: 10.1016/j.joen.2007.12.007.
This study is a quantitative assessment of the luminous energy transmitted through different translucent fiber posts. After embedding the posts in black resin, the blocks were submitted to sequential cuts in a precision machine, and depths of 16 mm, 12 mm, 8 mm, and 4 mm were assessed for light transmission with a digital photometer. The quantitative analysis showed significant differences between different posts and depths. Furthermore, the values obtained revealed that the quantity of luminous energy transmitted depends on the type of post and that for all of them there was a significant reduction of the quantity of light transmitted as the depth increased. Even without the post, the luminous intensity inside the canal seems to decrease to levels that are insufficient for polymerization, especially in the apical third.
本研究是对通过不同半透明纤维桩传输的光能进行定量评估。将桩嵌入黑色树脂中后，把块体在精密机器上进行连续切割，并使用数字光度计评估16毫米、12毫米、8毫米和4毫米深度处的光传输情况。定量分析表明不同桩和深度之间存在显著差异。此外，所获得的值表明，传输的光能数量取决于桩的类型，并且对于所有桩来说，随着深度增加，传输的光量都有显著减少。即使没有桩，根管内的光强似乎也会降低到不足以进行聚合的水平，尤其是在根尖三分之一处。
