title: The Effect of Carbon Dioxide (CO2) Laser on Sandblasting with Large Grit and Acid Etching (SLA) Surface.
abstract: BACKGROUND
  The purpose of this study was to investigate the effect of 6W power Carbon Dioxide Laser (CO2) on the biologic compatibility of the Sandblasting with large grit and acid etching (SLA) titanium discs through studying of the Sarcoma Osteogenic (SaOS-2) human osteoblast-like cells viability.
  
  
  METHODS
  Sterilized titanium discs were used together with SaOS-2 human osteoblast-like cells. 6 sterilized SLA titanium discs of the experimental group were exposed to irradiation by CO2 laser with a power of 6W and 10.600nm wavelength, at fixed frequency of 80Hz during 45 seconds in both pulse and non-contact settings. SaOS-2 human osteoblast-like cells were incubated under 37°C in humid atmosphere (95% weather, 5% CO2) for 72 hours. MTT test was performed to measure the ratio level of cellular proliferation.
  
  
  RESULTS
  The results indicated that at 570nm wavelength, the 6W CO2 laser power have not affected the cellular viability.
  
  
  CONCLUSIONS
  CO2 laser in 6w power has had no effect on the biologic compatibility of the SLA titanium surface.
authors.affiliation: Department of Biology, Faculty of Biological Science, Kharazmi University, Tehran, Iran.
authors.forename: Tahereh
authors.initials: T
authors.lastname: Foroutan
authors.affiliation: Department of Periodontology, Faculty of Dentistry, Azad University, Branch of Tehran, Tehran, Iran.
authors.forename: Nader
authors.initials: N
authors.lastname: Ayoubian
keywords: CO2 laser; SLA; titanium