石英玻璃纤维支柱的透光率优于玻璃纤维支柱。

Ana Cp Pasmadjian, Alysson N Diógenes, Camila P Perin, Juliana Pierdoná, Liliana Vml Rezende, Isabela R Madalena, Flares Baratto-Filho, Leonardo F da Cunha
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摘要

与金属根内桩相比,纤维增强预制关节内桩由于其在临床应用中的几个有利特性而广受欢迎。目的:用两种不同的方法评价两种纤维桩的透光能力。材料和方法:将桩分为两组:实验组-石英玻璃纤维桩(n=10)和对照组-玻璃纤维桩。通过照片光强测试和紫外可见分光光度计对样品的透光率进行了比较。该测试按三分之一进行分析:冠状、中间和心尖。分光光度计测试了沿着柱子长度的透光率。结果:实验组桩冠三分之一、中三分之一和顶三分之一的透光率分别为97%、68%和27.66%。在对照组的柱中,光透射在冠状三分之一处为95.33%,在中三分之一为80.66%,在顶端三分之一则为41.33%。与对照组相比,实验组中间三分之一的柱子的透光率显著较高(p
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The luminous transmittance of the quartz-glass fiber posts is superior to glass fiber posts.

Fiber-reinforced prefabricated intraarticular posts have gained popularity due to several favorable characteristics for clinical use compared to metallic intraradicular posts.

Aim: To evaluate the light transmission capacity of two types of fiber posts, using two different methods.

Materials and method: The posts were divided into two groups: experimental group - quartz-glass fiber posts (n=10) and control group - glass fiber posts (n=10). The light transmittance of the samples was compared by means of light intensity test by photographs and ultraviolet-visible spectrophotometer. This test was analyzed by thirds: coronal, middle, and apical. The spectophotometer tested the luminous transmittance along the length of the post. The statistical analysis was conducted with a significance level of 0.05.

Results: Light transmission was 97% on the coronal third, 68% in the middle third, and 27.66% in the apical third in the posts of the experimental group. In the posts of the control group, the light transmission was 95.33% in the coronal third, 80.66% in the middle third, and 41.33% in the apical third. Light transmission was significantly higher in the middle third of the posts of the experimental group when compared to the control group (p<0.05). The luminous transmittance of the posts of the experimental group was 97.4% with wavelengths of 400 nm, 97% at 450 and 500 nm, and 96.9% at 550 nm. In the posts of the control group, the luminous transmittance was 72.3% with wavelengths of 400 nm, 68.6% at 450 nm; 64.6% at 500 nm and 61.5% at 550 nm. The posts of the experimental group demonstrated significantly higher light transmittance than the control group (p<0.001).

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