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Abstract
To compare the efficacy of low level laser therapy (LLLT) versus cryotherapy on postoperative pain and trismus after surgical removal of third molar. LLLT and Cryotherapy have been effective in reducing pain and trismus thus improving the quality of patients{u2019} lives. Forty patients who undergone surgical removal of their lower third molar were participated in this study. They were randomly assigned to two groups of twenty patients. A diode laser device with a continuous wavelength of 808 nm and a maximal output power of 100 m W was used. Patients in the LLLT group received 12 J (fluence of 4 J / cm2) extraorally over four points on masseter muscle for 10 days. Patients in the Cryotherapy group received postoperative ice bag on the painful area of check for 30 minutes for 10 days. Visual analogue scale and Inter-incisal mouth opening (IMO) were used before starting the treatment, after fifth days of treatment and after ten days of treatment