Universidade de Brasília, Faculdade de Ciências da Saúde, Brasília, Brasil.
Universidade Positivo, Faculdade de Engenharia Civil, Curitiba, Brasil.
Acta Odontol Latinoam. 2023 Aug 31;36(2):106-111. doi: 10.54589/aol.36/2/106.
Fiber-reinforced prefabricated intraarticular posts have gained popularity due to several favorable characteristics for clinical use compared to metallic intraradicular posts.
To evaluate the light transmission capacity of two types of fiber posts, using two different methods.
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.
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).
评估两种类型纤维桩的透光能力，使用两种不同的方法。
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（n=10）。通过照片和紫外可见分光光度计的光强测试比较样品的透光率。该测试分为三部分进行分析：冠部、中部和根尖部。分光光度计测试沿桩长方向的光透过率。统计分析采用 0.05 的显著性水平。
实验组的冠部透光率为 97%，中部为 68%，根尖部为 27.66%。对照组的冠部透光率为 95.33%，中部为 80.66%，根尖部为 41.33%。实验组中部的透光率明显高于对照组（p<0.05）。实验组的桩在 400nm 波长时的光透过率为 97.4%，在 450nm 和 500nm 时为 97%，在 550nm 时为 96.9%。对照组的桩在 400nm 波长时的光透过率为 72.3%，在 450nm 时为 68.6%，在 500nm 时为 64.6%，在 550nm 时为 61.5%。实验组的桩透光率明显高于对照组（p<0.001）。
