Bruxism: Is there an indication for muscle-stretching exercises?

Bruxism is a common phenomenon involving repetitive activation of the masticatory muscles. Muscle-stretching exercises are a recommended part of several international guidelines for musculoskeletal disorders. They may be effective in the management of the jaw-muscle activity that gives rise to bruxism. However, most studies of muscle-stretching exercises have mainly focused on their influence on the performance (eg, range of motion, coordination, and muscle strength) of the limb or trunk muscles of healthy individuals or individuals with sports-related injuries. Very few studies have investigated stretching of the human masticatory muscles, and none have investigated muscle-stretching exercises in the management of sleep bruxism (SB). This article reviews the literature on muscle-stretching exercises and their potential role in the management of SB or its consequences in the musculoskeletal system. Keywords: bruxism, muscle stretching, jaw muscle stretching protocol