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Academy of Laser Dentistry (ADL) Laser Certification Exam ( Update 2025 / 2026) Questions & Answers
Question:
What absorbs laser light energy in tissue?
Answer:
chromophores
Question:
What is the relationship between laser wavelength and chromophores?
Answer:
you want to match the wavelength of the laser to that of the chromophores present in the target tissue
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Question:
What is transmission of a laser?
Answer:
movement of laser energy through a tissue with no effect on that tissue
Question:
What is reflection of laser energy?
Answer:
when the light re-directs itself off of a surface with no effect on the target tissue
Question:
What six factors determine the biologic effect of a laser?
Answer:
-wavelength -power density -duty cycle -emission mode/frequency -duration of exposure -controlling the amount of cooling
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Question:
Who needs to wear eye protection when working with lasers?
Answer:
anyone in the nominal hazard zone
Question:
What is nominal ocular hazard distance?
Answer:
the distance along the axis from the laser to the human eye beyond which the irradiance will not exceed MPE
Question:
What is NOHD?
Answer:
nominal ocular hazard distance
Question:
What is MPE?
Answer:
maximum permissible exposure 3 / 4
Question:
What is NHZ?
Answer:
nominal hazard zone
Question:
What is another name for NHZ?
Answer:
laser controlled area
Question:
What is the nominal ocular hazard area?
Answer:
the controlled area where the laser is being fired
Question:
What determines the NHZ for a laser?
Answer:
the NOHD
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