Long-term evaluation of the effect of low-level laser therapy on orthodontic miniscrew stability and peri-implant gingival condition: A randomized clinical trial
Volume 6, Issue 3, September 2017, Pages 109–114
Objectives
The
aim of this study was to assess the stability of immediately loaded
miniscrews in the buccal alveolar bone of the maxilla and the degree of
peri-implant gingival inflammation after the application of low-level
laser therapy.
Methods
Twenty-four
miniscrews, 12 each, were inserted into the buccal alveolar bone
between the second premolar and first molar on the right and left sides
of the patient. The sides were randomly divided into experimental and
control sides, after which the experimental side received four
applications of low-level laser therapy (LLLT) during the first 14 days
of insertion with 60 seconds for each application and an interval of
72 hours between each application. The control side did not receive any
laser application. After 14 days of miniscrew insertion, both sides were
loaded with a horizontal force of 150g for canine retraction.
The miniscrew mobility was assessed at different times (before and after
loading; 7, 14, 21, 30, and 60 days) with periotest, and peri-implant
gingival inflammation was assessed using the gingival index.
Results
LLLT
has been shown to improve stability of orthodontic miniscrews as
evidenced by reduced mobility values measured with periotest but the
results were not statistically significant. LLLT has definite influence
on reducing gingival inflammation around miniscrews, as evidenced by
gingival index values from the experimental side, whereas the control
side experienced moderate inflammation after 2 months of placement.
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