Objective: Bruxism is defined as a parafunctional activity. It could be in diurnal or nocturnal form, based on the time it occurs. The purpose of the study compares the effectiveness of occlusal splint treatments in children with nocturnal bruxism using the BiteStrip®. Study Design: The muscle activity of children was measured using the BiteStrip®. The groups used occlusal splints during nighttime sleep for three months, at the end of which their muscle activity were measured again through the use of the BiteStrip®. Results: Muscle pain in palpation and pain in the dynamic position of TMJ pain was significantly reduced in patients using soft occlusal splint (p=0.01). There was no significant change in the BiteStrip® score in both group I (p=0.11) and group II (p=0.61). Conclusion: Soft occlusal splints could reduce pain caused by nocturnal bruxism on muscle and TMJ. The relationship between treatment results and BiteStrip® scores of patients using soft occlusal splint or hard occlusal splint are not significantly.

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