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The Effects of Er:YAG Laser Treatment on Titanium Surface Profile and Osteoblastic Cell Activity: An In Vitro Study
- Source :
- Journal of Periodontology. 82:1169-1177
- Publication Year :
- 2011
- Publisher :
- Wiley, 2011.
-
Abstract
- Laser light has been proposed as a tool to decontaminate the surface of endosseous implants. The effects of this maneuver on the interactions between cells and surface, however, are poorly known. The goal of the present study is to investigate osteoblast growth and differentiation on three commercially available surfaces untreated or after irradiation by erbium-doped:yttrium, aluminum, and garnet (Er:YAG) laser at two levels: 150 and 200 mJ/pulse at 10 Hz.Human osteoblastic Saos-2 cells were plated on machined, sandblasted and acid-etched titanium, or titanium plasma-sprayed disks. The effects of lasing were observed with a scanning electronic microscope, and cell viability was measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Moreover, we measured the production of the osteoblast-specific protein osteocalcin and of osteoprotegerin in the supernatants by immunoenzymatic assays.Although no visible changes were observed on machined or titanium plasma-sprayed disk samples at the tested levels, titanium peaks on sandblasted and acid-etched titanium disks appeared fused as a consequence of laser irradiation. Interestingly, cell proliferation was slower on irradiated titanium at both intensities on all the surfaces. Cell differentiation, as assessed by osteocalcin production, was generally unaffected by laser treatment, whereas the production of osteoprotegerin was decreased on all the surfaces irradiated at the intensity of 200 mJ/10Hz.These results indicate that Er:YAG laser at energy levels used in this study can alter the surface profile of titanium implants and these changes may negatively affect the viability and the activity of osteoblastic cells. Therefore, Er:YAG lasers should be used with caution on titanium surfaces.
- Subjects :
- musculoskeletal diseases
Materials science
Surface Properties
Dentistry
chemistry.chemical_element
Lasers, Solid-State
Cell Line
law.invention
Osseointegration
law
medicine
Humans
Viability assay
Irradiation
Decontamination
Cell Proliferation
Dental Implants
Titanium
Osteoblasts
biology
business.industry
Osteoblast
Laser
medicine.anatomical_structure
chemistry
Dental Etching
Osteocalcin
biology.protein
Periodontics
Electron microscope
business
Er:YAG laser
Biomedical engineering
Subjects
Details
- ISSN :
- 19433670 and 00223492
- Volume :
- 82
- Database :
- OpenAIRE
- Journal :
- Journal of Periodontology
- Accession number :
- edsair.doi.dedup.....ece8a5bb3cd88bd3c5a69c152716dd80
- Full Text :
- https://doi.org/10.1902/jop.2010.100428