Environmental Noise Linked to Increased Risk of Temporomandibular Disorders, Bruxism, and Malocclusion
A recent comparative cross-sectional study conducted in New Delhi, India, has found a significant association between chronic high environmental noise exposure and a higher prevalence of temporomandibular joint disorders (TMD), bruxism (teeth grinding), and malocclusion among urban adults. The study, which involved 300 participants from high-traffic and low-traffic residential areas, revealed that residents in high-traffic zones experienced significantly greater odds of TMJ symptoms (61.3% vs. 25.3%), malocclusion (52.0% vs. 26.0%), and bruxism (42.7% vs. 14.0%) compared to those in low-traffic areas. High noise exposure, defined as LAeq,24h > 65 dBA, was identified as the strongest independent predictor of TMD, with an adjusted odds ratio of 3.10. The findings suggest a dose-response relationship, where the prevalence of TMD increased monotonically with higher noise exposure levels. While the study's cross-sectional design prevents establishing causality, it supports a biologically plausible pathway invol...