الفهرس 
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Abstract
SUMMARY
Nowadays, orthodontic ceramic brackets are widely used
in dental practice. Debonding of ceramic bracket is difficult
and may cause enamel damage. So there were attempts to
decrease this damage and make debonding of ceramic bracket
easier than before. One of these attempts is using Laser aided
debonding technique.
This study was performed to evaluate the effect of
irradiation of diode laser (940 nm) on debonding of ceramic
brackets, measure the temperature in the pulp chamber,
evaluate shear bond strength and measure Adhesive Remnant
Index (ARI)
So, the study was performed on 66 premolar tooth blocks,
they were numerated and divided into 6 groups with cavity
preparation on occlusal surface looked like an endodontic
access cavity.
The study groups were as following:
group I: the non lased polycrystalline ceramic bracket type
group.
group II: the 2W diode laser polycrystalline ceramic bracket
type group