Low-level Laser Therapy Versus Electrical Stimulation for the Management of Acute Bell’s Palsy: A Randomized Clinical Trial

Abstract

Purpose: Electrotherapy is a common intervention for the rehabilitation of Bell’s palsy. Low-level Laser Therapy (LLLT) and Electrical Stimulation (ES) are two therapeutic interventions for Bell’s palsy that have been proven to be superior to conventional treatments. To date, no clinical trial has compared the effectiveness of these two interventions. This pilot study was done to compare the effectiveness of LLLT and ES in the management of acute Bell’s palsy. Methods: This randomized clinical trial was done on 25 participants with acute Bell’s palsy who were randomized into two groups with 12 participants that received LLLT and 13 participants that received ES. All participants received 12 treatment sessions over two weeks. Sunnybrook Facial Grading System (SFGS) was used to assess facial symmetry and Facial Disability Index (FDI) for facial function. Outcomes were assessed at baseline and after two weeks. Results: There was a significant improvement in SFGS and FDI scores within both groups (P<0.005). There was no significant difference in SFGS and FDI scores between groups (P=0.164; P=0.423). Conclusion: There is no difference between LLLT and ES in improving facial symmetry and function in acute Bell’s palsy.