کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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3167865 | 1199379 | 2010 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Attachment of cultured fibroblasts and ultrastructural analysis of simulated cervical resorptions treated with high-power lasers and MTA Attachment of cultured fibroblasts and ultrastructural analysis of simulated cervical resorptions treated with high-power lasers and MTA](/preview/png/3167865.png)
ObjectiveThe present study evaluated the fibroblast attachment and the morphologic changes of simulated cervical root resorptions after irradiation with high-power lasers and the use of mineral trioxide aggregate (MTA).Study designStandardized cavities were done on the coronal third of 40 single-rooted teeth and assigned into 4 groups according to the treatment applied: (1) untreated control, (2) use of MTA, (3) irradiation with Er:YAG laser (42mJ, 10 Hz, 10 s), and (4) irradiation with high-power diode laser (1 W, 10 s). Fragments were prepared for SEM analysis: 6 samples of each group were plated with human gingival fibroblasts and 4 samples were used for ultrastructural analysis.ResultsThe cells' attachment was in decreasing order: G3 > G4 > G1> G2, with statistical differences among all groups (P < .05). The samples irradiated with Er:YAG exhibited roughness on the dentinal surface, no smear layer, and open dentinal tubules; those irradiated with diode laser exhibited a smooth surface, more smear layer, and closed dentinal tubules; and the control group showed high amount of smear layer and closed dentin tubules.ConclusionsIrradiation with Er:YAG and diode lasers caused morphologic changes on the dentinal surfaces of simulated resorptions that favored cells' adhesion. MTA showed lower biocompatibility than irradiated groups but allowed cells' adhesion.
Journal: Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology - Volume 109, Issue 2, February 2010, Pages e154–e161