Abstract
Bruxism is a nocturnal parafunctional activity represented by grinding and clenching of the teeth. Bruxism is considered to be the most harmful of the parafunctional activities of the stomatognathic system, being responsible for tooth wear, periodontal lesions and joint and/or muscle lesions. This study consists of a group of 189 children (111 male and 78 female) that responded correctly and completely to a questionnaire that contained nine items assessing sleep bruxism. According to our research, there was a statistically significant association between bruxism and headache (p<0.0001), tooth/gingival sensitivity (p<0.0001), muscle stiffness, presence of stress (p<0.0001), and vicious habits. Within the limits of this study, parafunctional phenomena such as nocturnal bruxism interest an important percentage, over 60%, involving children of both genders in relatively equal proportions.