MWU LASER EXAM CLASS OF 2025 QUESTIONS WITH 100% CORRECT ANSWERS!!
The unit of frequency (number of laser pulses/sec.) is: - (answer)Hertz
The unit of energy density (amount of energy per unit area) is: - (answer)Fluence
What is the definition of Power? - (answer)Amount of work performed per unit time, expressed in watts
(W)
During non-surgical laser-assisted periodontal therapy, how deep into the periodontal pocket is the tip
of the laser fiber placed? - (answer)To the base of the pocket
A laser pulse cycles between ON for 5 ms and OFF for 20 ms. What is the duty cycle? - (answer)20%
Vaporization of soft tissues occurs at: - (answer)100-150 C
In Photobiomodulation Therapy (PBMT), low doses stimulate wound healing while high doses inhibit
pain. What principle does this follow? - (answer)Arndt-Schultz Principle
Which of the following is TRUE regarding the THOR® laser used for PMBT? - (answer)It has wavelengths
of 660 nm and 810 nm
The first laser ever built in 1960 was: - (answer)Ruby
Laser is an acronym for: - (answer)Light amplification by stimulated emission of radiation
Dental laser beams are: - (answer)Monochromatic, coherent, and collimated
Which laser wavelength can penetrate to the retina of the eye and cause damage? - (answer)Nd:YAG
, MWU LASER EXAM CLASS OF 2025 QUESTIONS WITH 100% CORRECT ANSWERS!!
Which of the following is NOT a tissue chromophore that absorbs an infrared dental laser wavelength? -
(answer)Sodium
The peak power of a laser running in Continuous Wave mode is: - (answer)The same as its average
power
Thermal relaxation refers to: - (answer)The ability of the tissues to absorb and dissipate heat to help
minimize thermal damage with pulsed laser usage
Carbonization of soft tissues occurs at what temperature? - (answer)200+ C
Photobiomodulation utilizes which of the following? - (answer)Nonionizing light sources, lasers and
LEDs, visible and infrared
When using the 810 nm Diode laser, in what circumstance would we use the non-initiated tip? -
(answer)Photobiomodulation
Which of the following is NOT a result of photobiomodulation? - (answer)Reduced function of
osteoblasts
What are the two lasers that must be in contact with the tissue for ablation to happen? - (answer)Diode
and Nd:YAG
When using dental lasers: - (answer)Optical Density must be inscribed on the frame or lens
The laser plume: - (answer)May contain hazardous chemicals and infectious agents
You have a patient that presents with melanin pigmentation of gingiva and the patient would like the
pigment removed. Which of the following lasers is BEST indicated for treatment? - (answer)Nd:YAG
The unit of frequency (number of laser pulses/sec.) is: - (answer)Hertz
The unit of energy density (amount of energy per unit area) is: - (answer)Fluence
What is the definition of Power? - (answer)Amount of work performed per unit time, expressed in watts
(W)
During non-surgical laser-assisted periodontal therapy, how deep into the periodontal pocket is the tip
of the laser fiber placed? - (answer)To the base of the pocket
A laser pulse cycles between ON for 5 ms and OFF for 20 ms. What is the duty cycle? - (answer)20%
Vaporization of soft tissues occurs at: - (answer)100-150 C
In Photobiomodulation Therapy (PBMT), low doses stimulate wound healing while high doses inhibit
pain. What principle does this follow? - (answer)Arndt-Schultz Principle
Which of the following is TRUE regarding the THOR® laser used for PMBT? - (answer)It has wavelengths
of 660 nm and 810 nm
The first laser ever built in 1960 was: - (answer)Ruby
Laser is an acronym for: - (answer)Light amplification by stimulated emission of radiation
Dental laser beams are: - (answer)Monochromatic, coherent, and collimated
Which laser wavelength can penetrate to the retina of the eye and cause damage? - (answer)Nd:YAG
, MWU LASER EXAM CLASS OF 2025 QUESTIONS WITH 100% CORRECT ANSWERS!!
Which of the following is NOT a tissue chromophore that absorbs an infrared dental laser wavelength? -
(answer)Sodium
The peak power of a laser running in Continuous Wave mode is: - (answer)The same as its average
power
Thermal relaxation refers to: - (answer)The ability of the tissues to absorb and dissipate heat to help
minimize thermal damage with pulsed laser usage
Carbonization of soft tissues occurs at what temperature? - (answer)200+ C
Photobiomodulation utilizes which of the following? - (answer)Nonionizing light sources, lasers and
LEDs, visible and infrared
When using the 810 nm Diode laser, in what circumstance would we use the non-initiated tip? -
(answer)Photobiomodulation
Which of the following is NOT a result of photobiomodulation? - (answer)Reduced function of
osteoblasts
What are the two lasers that must be in contact with the tissue for ablation to happen? - (answer)Diode
and Nd:YAG
When using dental lasers: - (answer)Optical Density must be inscribed on the frame or lens
The laser plume: - (answer)May contain hazardous chemicals and infectious agents
You have a patient that presents with melanin pigmentation of gingiva and the patient would like the
pigment removed. Which of the following lasers is BEST indicated for treatment? - (answer)Nd:YAG
