Oral Biol Res.
2021 Jun;45(2):49-58. 10.21851/obr.45.02.202106.49.
Effect of erbium-doped yttrium-aluminum-garnet laser on surface characteristics and biocompatibility of resorbable blast media titanium
- Affiliations
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- 1Postgraduate Student, Department of Dental Science Graduate School, Chonnam National University, Gwangju, Republic of Korea
- 2Postgraduate Student, Department of Dental Science Graduate School, Chonnam National University, Gwangju, Republic of Korea
- 3Postgraduate Student, Department of Dental Science Graduate School, Chonnam National University, Gwangju, Republic of Korea
- 4Professor, Department of Periodontology, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
- KMID: 2517480
- DOI: http://doi.org/10.21851/obr.45.02.202106.49
Abstract
- Er:YAG laser irradiation can modify the surface characteristics of titanium surface. This study aimed to evaluate the influence of Er:YAG laser irradiation on mechanical, chemical, and biological characteristics of resorbable blast media (RBM) titanium surfaces. RBM disks were divided into 4 groups. Control groups were nonirradiated RBM disks. Laser irradiated groups were divided into the RBM-50, RBM-100, and RBM-250 group which irradiated Er:YAG laser at energy level 50, 100, and 250 mJ/pulse, respectively. In scanning electron microscopy (SEM) images, whereas the RBM-50 group showed slightly melted surface area, RBM-100 and RBM-250 groups showed broken areas caused by Er:YAG laser. Laser irradiated groups had significantly higher roughness than the control group. The roughness of the RBM-50 group was comparable with the RBM-100 group and significantly lower than the RBM-250 group (p<0.05). In X-ray diffractometer analysis of the laser irradiated group, Ti (002) (rutile) proportion to Ti (101) (anatase) was decreased according to energy level. In X-ray photoelectron spectroscopy analysis, RBM-50 and RBM-100 groups show the crystal change from acidic Ti-OH to basic Ti-OH. MC3T3-E1 cells of all groups adhered and proliferated well on the surfaces and their morphology was not different between groups in SEM images. The alkaline phosphatase activity levels of RBM-50 and RBM-100 groups showed higher than those of the control group (p<0.05). Therefore, within the limitations of this study, Er:YAG laser irradiation at low energy levels can modify mechanical and chemical characteristics of the RBM surface, leading to improve the biological responses of osteoblastic cells on the surface.
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