Periodontology. Lasers
What does LASER stand for? - answer light amplification by stimulated emission of
radiation
On the electromagnetic spectrum where do lasers lie? - answer Infrared
Are lasers ionizing? - answer No
Which rays are ionizing? – answer UV, X-Rays, Gamma Rays
What is wavelength? - answer distance from wave crest (peak) to wave crest (peak)
In general, the properties of laser light are much different from those of natural light.
Which of the following is FALSE?
A) Laser light is generally coherent
B) Laser light is usually divergent
C) Laser light is monochromatic
D) Laser light is collimated – answer B
Depending on the specific type of laser, laser energy is emitted in very specific portions
of the electromagnetic spectrum. Where in the spectrum do most lasers operate?
A) in both the ultraviolet and visible portions
B) in the visible portion
C) in both the visible and infrared portions
D) in the ultraviolet portions - answerC
What does collimated mean? - answerwavelengths can be focused, very directional
What does coherency mean? - answerwavelengths are superimposed on one another,
synchronized in phase
Characteristics of White (visible) Light - answerMultiple wavelengths
Non-directional
Non-focused
What is monochromatic? - answervery precise color or wavelength (one color)
What are wavelengths measure in? - answernanometers (nm)
How do lasers work? - answerCoverstion of light energy into thermal (heat) energy
, What are hard tissue lasers attracted to? - answerwater and hydroxyapatite
What are soft tissue lasers attracted to? - answermelanin and hemoglobin
Is the Diode a soft or hard tissue laser? - answersoft tissue laser
What is a doped laser? - answercombination of metals and crystals to produce a laser
beam
True or False
Each laser usues different materials in the laser medium to produce varying
wavelengths of light. - answerTrue
When the laser light contacts human tissue, what happens? - answervaporizes the
water content within the cell and creates a char layer
Lasers work by... - answerfocusing a beam of light, or a single wavelength of photons,
at a target
Define Joule - answera measure of energy
Define Watt - answerunit of power
The smaller the focal spot, the ___(higher or lower)____ power of density. -
answerHigher
Power density is measured in ? - answerwatts/cm2
One watt = ____ joules for one second - answer1
What is a photon? - answerthe elemental quantity, or quantum of radiant energy
When using a laser, power density is measured in? - answerwatts/cm2
When a laser is focused will it cut into the connective tissues? - answerYes and a
defocused laser will cut to the epithelium
Laser power is expressed as: - answerWatts (W)
Dental laser beams are conducted by all of the following EXCEPT:
A) quartz fibers
B) hollow wave guides
C) articulated arms
D) platinum cable
E) all of the above conduct dental laser beams - answerD
What does LASER stand for? - answer light amplification by stimulated emission of
radiation
On the electromagnetic spectrum where do lasers lie? - answer Infrared
Are lasers ionizing? - answer No
Which rays are ionizing? – answer UV, X-Rays, Gamma Rays
What is wavelength? - answer distance from wave crest (peak) to wave crest (peak)
In general, the properties of laser light are much different from those of natural light.
Which of the following is FALSE?
A) Laser light is generally coherent
B) Laser light is usually divergent
C) Laser light is monochromatic
D) Laser light is collimated – answer B
Depending on the specific type of laser, laser energy is emitted in very specific portions
of the electromagnetic spectrum. Where in the spectrum do most lasers operate?
A) in both the ultraviolet and visible portions
B) in the visible portion
C) in both the visible and infrared portions
D) in the ultraviolet portions - answerC
What does collimated mean? - answerwavelengths can be focused, very directional
What does coherency mean? - answerwavelengths are superimposed on one another,
synchronized in phase
Characteristics of White (visible) Light - answerMultiple wavelengths
Non-directional
Non-focused
What is monochromatic? - answervery precise color or wavelength (one color)
What are wavelengths measure in? - answernanometers (nm)
How do lasers work? - answerCoverstion of light energy into thermal (heat) energy
, What are hard tissue lasers attracted to? - answerwater and hydroxyapatite
What are soft tissue lasers attracted to? - answermelanin and hemoglobin
Is the Diode a soft or hard tissue laser? - answersoft tissue laser
What is a doped laser? - answercombination of metals and crystals to produce a laser
beam
True or False
Each laser usues different materials in the laser medium to produce varying
wavelengths of light. - answerTrue
When the laser light contacts human tissue, what happens? - answervaporizes the
water content within the cell and creates a char layer
Lasers work by... - answerfocusing a beam of light, or a single wavelength of photons,
at a target
Define Joule - answera measure of energy
Define Watt - answerunit of power
The smaller the focal spot, the ___(higher or lower)____ power of density. -
answerHigher
Power density is measured in ? - answerwatts/cm2
One watt = ____ joules for one second - answer1
What is a photon? - answerthe elemental quantity, or quantum of radiant energy
When using a laser, power density is measured in? - answerwatts/cm2
When a laser is focused will it cut into the connective tissues? - answerYes and a
defocused laser will cut to the epithelium
Laser power is expressed as: - answerWatts (W)
Dental laser beams are conducted by all of the following EXCEPT:
A) quartz fibers
B) hollow wave guides
C) articulated arms
D) platinum cable
E) all of the above conduct dental laser beams - answerD
