Laser Practice Test Questions and
Answers
1.Which laser has the least absorption in healthy dental hard tissues?
-Er,Cr;YSGG 2780 nm
-Nd;YAG 1064nm
-Er;YAG 2940 nm
-CO2 10,600 nm
Answer -Nd;YAG 1064nm
2.When exposing implants, lasers have which advantage over
conventional instrumentation?
-More accurate placement of implant fixt
-Hemostasis
-Ease of assessing periodontal status
-Ability to determine osseous integration
Answer -Hemostasis
3.Which of the following is an indication for use of an erbium laser?
-Composite curing
-Amalgam removal
-Zirconium restoration removal
-Soft Tissue Crown lengthening
Answer -Zirconium restoration removal
1/
23
,4.Which of the following dental lasers operates at the longest wavelength
of the electromagnetic spectrum?
-Nd;YAG (Near Infrared)
-CO2 (Far infrared)
-Argon (Visible)
-He-Ne (Visible)
Answer -CO2 (Far infrared)
5.Pulse duration relates to
-Power level during an individual pulse
-Energy Density
-Time for tissue coding
-Time of interaction of each pulse with the tissue
Answer -Time of interaction of each pulse with the tissue
6.Laser energy exiting a fiber is
-Collimated
-Unfocused
-Divergent
-Frequency-shifted (doubled)
Answer -Collimated
7.Er;YAG and Er,Cr;YSGG dental lasers can
2/
23
, -Perform soft tissue excisions
-Provide excellent hemostasis
-Diagnose caries
-Operate in a continuous wave mode
Answer -Perform soft tissue excisions
8.The range of invisible, non-ionizing infrared radiation begins at
approxi- mately
-400 nm
-600 nm
-800 nm
-200 nm
Answer -800 nm
9.Which of the following is a contradiction to laser therapy?
-Supplemental oxygen
-Artificial heart valve
-Pregnancy
-Lip balm
Answer -Supplemental oxygen
10.When performing soft tissue surgery using a 9300nm laser in close
prox- imity to the tooth structure caution is advised to prevent
-Tetragenic effects
3/
23
Answers
1.Which laser has the least absorption in healthy dental hard tissues?
-Er,Cr;YSGG 2780 nm
-Nd;YAG 1064nm
-Er;YAG 2940 nm
-CO2 10,600 nm
Answer -Nd;YAG 1064nm
2.When exposing implants, lasers have which advantage over
conventional instrumentation?
-More accurate placement of implant fixt
-Hemostasis
-Ease of assessing periodontal status
-Ability to determine osseous integration
Answer -Hemostasis
3.Which of the following is an indication for use of an erbium laser?
-Composite curing
-Amalgam removal
-Zirconium restoration removal
-Soft Tissue Crown lengthening
Answer -Zirconium restoration removal
1/
23
,4.Which of the following dental lasers operates at the longest wavelength
of the electromagnetic spectrum?
-Nd;YAG (Near Infrared)
-CO2 (Far infrared)
-Argon (Visible)
-He-Ne (Visible)
Answer -CO2 (Far infrared)
5.Pulse duration relates to
-Power level during an individual pulse
-Energy Density
-Time for tissue coding
-Time of interaction of each pulse with the tissue
Answer -Time of interaction of each pulse with the tissue
6.Laser energy exiting a fiber is
-Collimated
-Unfocused
-Divergent
-Frequency-shifted (doubled)
Answer -Collimated
7.Er;YAG and Er,Cr;YSGG dental lasers can
2/
23
, -Perform soft tissue excisions
-Provide excellent hemostasis
-Diagnose caries
-Operate in a continuous wave mode
Answer -Perform soft tissue excisions
8.The range of invisible, non-ionizing infrared radiation begins at
approxi- mately
-400 nm
-600 nm
-800 nm
-200 nm
Answer -800 nm
9.Which of the following is a contradiction to laser therapy?
-Supplemental oxygen
-Artificial heart valve
-Pregnancy
-Lip balm
Answer -Supplemental oxygen
10.When performing soft tissue surgery using a 9300nm laser in close
prox- imity to the tooth structure caution is advised to prevent
-Tetragenic effects
3/
23
