الفهرس 
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Abstract
The present study was carried out to evaluate and compare two efficient techniques in
accelerating orthodontic tooth movement.16 female patients were divided randomly
into two equal groups, the first group received surgical corticotomy as a gold standard
group while the second group received surgical corticotomy assisted with low level
laser therapy in attempt for further acceleration of orthodontic tooth movement.
Assessment of the rate of canine retraction through split mouth technique was carried
out via series of dental models every 1 month. CBCT images were used to evaluate
the total distance traveled by the maxillary canine, 1st molar anchorage loss, tipping,
rotation and torque of both maxillary canine and 1st molar after 4 months of canine
retraction on both sides.
No statistical significant difference was found between both interventions as regards
the total distance traveled by the maxillary canine at the end of the 4 month study.
Similarly, the rate of canine retraction recorded every 4 weeks follow up period
showed statistical non-significant difference on both intervention sides. Moreover, no
difference was found in amount of molar anchorage loss or in any CBCT variables
assessing tipping, torque and rotation of maxillary canine and 1st molar. Root
resorption assessment showed statistically non-significant difference between the two
groups. from the results of the present study, the following conclusions can be
drawn:
Within the limitation of this study:
1. Low level laser therapy combined to corticotomy could not achieve a higher rate of
canine retraction compared to the golden standard corticotomy technique alone.
2. The canines in both sides showed significant distal tipping, palatal root torque and
distopalatal rotation upon retraction. The addition of low level laser therapy to
corticotomy did not affect the degree of tipping, torque and rotation of the upper
canines as no significant difference was found between both sides.
3. More bodily movement of the canine occurred on intervention side (corticotomy+
low level laser therapy) where the total distance travelled by the canine root apex and
center were significantly greater in the intervention side (corticotomy+ low level laser
therapy) than the comparator side (corticotomy alone).
4. Significant first molar mesial tipping occurred within the comparator group
(corticotomy alone), while it was insignificant in the intervention group
(corticotomy+ low level laser therapy). However, the difference between both sides
was statistically insignificant. First molar palatal root torque and rotation were minor
and varied insignificantly in both sides.