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Question 1 of 25
4% Complete
Before in-office bleaching with a laser-activated gel, a light-cured resin gingival barrier is placed. Apart from protecting against peroxide, why is this barrier important?
It removes the need for protective eyewear
It increases the laser power reaching the enamel by reflecting scattered light back towards the labial surfaces of the teeth
It acts as a photosensitiser for the laser
It prevents thermal and chemical gingival injury from energy absorbed by gel on soft tissue
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Laser Dentistry MCQ Test Paper 5 | MCQs with Answers | Quiz | MCDI