Abstract
Objectives. To estimate the prevalence of Bruxism and Temporomandibular Disorders (TMD) in two populations: a nationwide sample (Uruguay)and another sample formed by patients in treatment for problematic drug use in Portal Amarillo. Method. Two cross-sectional, descriptive and analytical studies: one nationwide and the other one in Portal Amarillo.Results. Portal Amarillo: TMD symptoms 67.6 %, bruxism symptoms 33.8 %, current TMD clinical signs 42.3 %, current or past bruxism signs 47.9 %. Nationwide sample: TMD symptoms 61.3 %, bruxism symptoms 27.7 %, current TMD signs 37.3 %, current or past bruxism signs 67.5 %. Conclusions. Trend that signals a higher prevalence of current TMD and bruxism in Portal Amarillo than in the nationwide sample. Current or past bruxism signs are more prevalent in the nationwide sample. New research should review the effects of the medication administered to treat the addiction before and during the treatment. Meanwhile we recommend the use of occlusal devices to minimize the sideeffects on the structures of the masticatory system.