الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
Objective: The current study was a Randomized Controlled Trial (RCT) that
was performed to evaluate the effect of low level laser therapy on the rate of
maxillary incisor intrusion in adult patients having deep bite associated with gummy
smile.
Materials and Methods: 24 patients having gummy smile associated with
deep bite were enrolled in the study (mean age of 20.4 years). Patients were
randomly allocated to one of two intervention groups. Both groups received fixed
orthodontic treatment with preadjusted edgewise brackets, segmented levelling and
alignment was carried out in upper arch until 17 X 25 STST-inch wire. Additionally,
two miniscrew implants (MSI) were inserted between the maxillary lateral incisor
and canines, then a total intrusive force of 100 grams was applied and checked with
force gauge. “group A” received LLLT during intrusion while “group B” was the
comparator with no LLLT application. LLLT was applied on day of force
application, then days 7, 14, 21,28,42,56 and continued for 2 weeks till the end of
follow up period (6 months).
Results: The monthly rate of intrusion showed no statistically or clinically
significant difference between both groups through the different follow up months
with mean rates of 0.7 mm/month and 0.66 mm/month for laser and non-laser groups
respectively.
Conclusion: Low level laser therapy with the parameters used had no
acceleratory effect on the rate of maxillary incisor intrusion.