Eficácia da terapia a laser de baixa intensidade na redução do edema, dor e parestesia no pós operatório de cirurgias ortognáticas: estudo randomizado duplo cego cruzado
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2013-06-21
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Universidade Federal de Goiás
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This study aimed to verify the effectiveness of using a low-level laser
therapy protocol to reduce swelling, pain and neurosensory disturbance
after orthognathic surgeries. Ten patients who underwent bilateral sagittal
split (BSSO) with Le Fort I osteotomy and had low-level laser therapy on
one side of the jaw were evaluated over a period of 60 days. The protocol
used was intra oral application after surgery (λ = 660 nm (Red), ED =
5J/cm2, t = 10 s / point, P = 20 mW, E = 1.2 J per point). And extra oral
application (λ = 789 nm infra-red), DE = 30J/cm2, t = 20 s / point, P = 60
mW, E = 1.2 J per point). After the fourth day, ten intraoral and extraoral
applications were performed (λ = 780nm (infrared), DE = 70J/cm2, P = 70
mW, t = 40s / point, E = 2.8 J, per point). Irradiated and non-irradiated side
data were compared post-operatively. In all assessments except the
immediate post operative assessment, swelling and pain decreased. There
is recovery of sensitivity on both sides, but on the irradiated side, recovery is
faster and almost normal at the last evaluation. The data for the irradiated
and non-irradiated sides were compared post-operatively. Fifteen, 30 and
60 days after surgery, sensitivity was recovered on both sides, but on the
irradiated side, recovery was faster and was almost complete at the time of
the last evaluation. Irradiated and non-irradiated sides were compared
regarding swelling coefficient and Visual Analogue Scale for pain
assessment. There were no significant differences between irradiated and
non-irradiated sides regarding swelling and pain in the immediate postoperative
assessment. Swelling significantly decreased in the irradiated side in the following post-operative assessments, from 2.15 to 0.21 (non
irradiated side: 2.72 to 1.29). Self-reported pain was less intense in the
irradiated side in the 24-hr (1.20 vs 3.4) and 3-day (0.60 vs 2.10)
assessments, but after 7 days of surgery either side did not show any pain.
This lower-level laser therapy protocol can improve tissue response and
reduce pain and swelling resulting from orthognathic surgeries and
accelerate the recovery of neurosensory disorders resulting from BSSO.
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GASPERINI, G. Eficácia da terapia a laser de baixa intensidade na redução do edema, dor e parestesia no pós operatório de cirurgias ortognáticas: estudo randomizado duplo cego cruzado. 2013. 90 f. Tese (Doutorado em Ciências da Saúde) - Universidade Federal de Goiás, Goiânia, 2013.