التفاصيل البيبلوغرافية
| العنوان: |
Comparing the Surface Behavior of Conventional and CAD-CAM Feldspathic Porcelains in the Face of Laser-Assisted Bleaching and Post-bleach Polishing. |
| المؤلفون: |
Harehdasht, Solaleh Amirpour, Zeighami, Somayeh, Chitsaz, Foujan, Ghodsi, Safoura |
| المصدر: |
Journal of Lasers in Medical Sciences; 2022, Vol. 13, p1-7, 7p |
| مصطلحات موضوعية: |
GRINDING & polishing, SURFACE roughness, DENTAL ceramics, MICROHARDNESS, TOOTH whitening |
| مستخلص: |
Introduction: The prevalence of using different esthetic methods increases the possibility of close contact between them with potential adverse interactions. This study aimed to compare the surface changes (microhardness and roughness) in two types of feldspathic porcelain after laser bleaching and post-bleach polishing. Methods: 12 standardized rectangular specimens were prepared for each porcelain group (conventionally layered and CAD-CAM milled). Vickers microhardness and roughness were evaluated before and after the bleaching procedure and after polishing. Data were statistically analyzed using repeated measures ANOVA and t test (P < 0.05). Results: The surface roughness of both groups increased significantly after laser bleaching (P < 0.001 for conventional and P = 0.004 for CAD-CAM porcelains). The polishing process reduced the roughness of both groups; the reduction was significant in conventional specimens (P = 0.020). The surface hardness values did not change significantly in the groups after bleaching and post-bleach polishing stages (P = 0.142). Generally, the average surface roughness of CAD-CAM specimens was significantly lower (P < 0.001), and the surface microhardness of the CAD-CAM group was significantly higher than conventional porcelains (P = 0.011). Conclusion: Laser bleaching significantly increased the surface roughness of feldspathic porcelains; however, it did not affect the surface microhardness significantly. Unlike CAD-CAM specimens, polishing significantly improved the surface smoothness of conventional porcelains. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Lasers in Medical Sciences is the property of Laser Application in Medical Sciences Research Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
