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Home / Laser Medicine / What is Laser/ Hard laser & Soft laser
 
What is Laser - Hard laser & Soft laser

Hard laser & Soft laser - What is difference?
Hard Laser (Surgical Laser) : which removes , kills , burns , cut something
Compact Laser (Soft Laser) : has Therapeutic effect of pain management / infection control / re-generation

Compact Laser (Soft Laser) :
  • Class 3 B Lasers by International Standards
  • Class 2 M Lasers introduced in India now
  • Low Power (1-500 mW)
  • 600-1000 nm wavelength (Red & Infrared light)
  • No thermal effect at all
  • Photochemical reaction (Photon energy converted to Biochemical energy) new chemical products formed leading to healthy effects in tissues
  • Principle of function : Photobiostimulation
  • Potential danger to eyes
  • Safe on skin
  • Comparatively affordable cost
  • No special set up required
  • Comparatively less human skill is required
  • Portable and mobile equipments
  • Examples : He-Ne Laser, GaAs & GaAlAs Diode Lasers
  • Fibreoptic delivery is possible
 
Hard Laser (Surgical Laser) :
  • Class 4 Lasers by International Standards
  • High Power (> 500 mW), usually 1W & above
  • Wavelengths vary from U.V. to Infrared
  • Thermal changes
  • Photothermal reaction (Photon energy converted to Thermal energy or heat) effects of tissue cutting, burning, photocoagulation
  • Principle of function : Photothermal
  • Potential danger to eyes
  • Potential danger to skin
  • Expensive
  • Special set up required
  • Comparatively high human skill is required
  • Usually non-portable
  • Examples : CO2, Er-YAG, Nd-YAG, Eximer, Diode Lasers
  • Fibreoptic delivery is not possible
 
 
 
 
 
 
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