Low Level Laser Therapy Flashcards
What type of energy is laser light
Electromagnetic
Between infrared , visible, and UV on the electromagnetic spectrum
What does laser stand for
Light amplification by stimulated emission of radiation
Is laser superficial or deep ? Thermal or nonthermal ?
Superficial nonthermal
What class is LLL ?
What is the output range?
Danger?
Class 3B
Output: 5-500 mW
Can cause eye damage but not skin damage (goggles required)
What is LLLT used for
Wound healing
Pain management
Biophysical characteristics of laser radiation
Monochromaticity ( for targeted and effective absorption)
Collimation ( concentrates beam of light making it focused on small target)
Coherence ( no specific advantage)
Physical components of laser device
Leasing medium (active medium) - excitable atoms
Ex: HeNe , Gallium Aluminum Arsenide
Resonance chamber
Power supply ( to activate the medium)
Laser types
Red light laser (HeNe)
Infrared-light laser (GaAs or GaAlAs)
Red laser light (HeNe)
Gaseous laser
Emits light in the visible red band (750-600 nm)
Penetration depth: 0.5 cm
Infrared light laser
Diode laser within IR band ( 1000 - 750 nm)
Wave length of GaAs: 904 nm
Wave length of GaAlAs = 820 nm
Penetration depth: 1.0 cm
Effects of LLLT (maybe skip this one)
Photobiomodulation:
- photobiostimulation: lower dosage + increases cell function
- photobioinhibition: higher dosage + decreases cell function
Photochemical mechanisms :
- photonics absorption:
- chromophores:
- penetration depth:
Physiological effects
Therapeutic benefits
Modes of laser emission
Continuous
Pulsed
Types of applicators
Single diode
Multiple diode (cluster diode)
General contraindications
Local contraindications
