SUMMARY
The purpose of this preliminary, double-blind, placebo-control study was to evaluate the effect of
GaAlAs diode laser on wound healing and pain reduction in patients after extraction of impacted
lower third molars by infrared thermography. Material and methods: The study population of two
patients was divided into group A treated by GaAlAs diode laser with a wavelength 830 nm and
maximal output power of 100 mW and group B treated by placebo laser. Therapeutic Schedule: The
energy density per point was 12 J, treatment time 2 minutes, the total energy density for one
treatment session was 36 J. Treatment intervals were 10 minutes after extraction, 1 and 3 days after
extraction. Patients in group B were treated with a placebo probe in the same schedule. Patients
evaluated the level of pain and swelling on 100 mm Visual Analog Scale. Thermographic
measurements were performed by ThermaCAMTM SC 2000 before extraction, 30 minutes after
extraction and on the 1st, 3rd, 5th, 8th days. Results: The patient treated by active laser reported
more pain and swelling during the first week after tooth extraction than the patient treated by
placebo laser. However, the comparison of thermograms of patients treated by placebo and active
laser showed the acceleration of wound healing after extraction in the patient treated with GaAsAl
diode laser. Conclusion: The treatment by GaAlAs diode laser, 830 nm and total energy density for
one treatment session 36 J had a stimulation effect on the healing process but did not lead to
reduction of pain and swelling in the patient after dental surgery.
KEY WORDS
GaAlAs diode laser; wound healing; pain; infrared thermography; tooth extraction
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