Industrial noise and tooth wear - experimental study

International Journal of Medical Sciences
Maria Alzira CavacasJosé Martins Dos Santos

Abstract

Tooth wear is a complex multifactorial process that involves the loss of hard dental tissue. Parafunctional habits have been mentioned as a self-destructive process caused by stress, which results in hyperactivity of masticatory muscles. Stress manifests itself through teeth grinding, leading to progressive teeth wear. The effects of continuous exposure to industrial noise, a "stressor" agent, cannot be ignored and its effects on the teeth must be evaluated. The aim of this study was to ascertain the effects of industrial noise on dental wear over time, by identifying and quantifying crown area loss. 39 Wistar rats were used. Thirty rats were divided in 3 experimental groups of 10 animals each. Animals were exposed to industrial noise, rich in LFN components, for 1, 4 and 7 months, with an average weekly exposure of 40 hours (8h/day, 5 days/week with the weekends in silence). The remaining 9 animals were kept in silence. The areas of the three main cusps of the molars were measured under light microscopy. A two-way ANOVA model was applied at significance level of 5%. The average area of the molar cusps was significantly different between exposed and non-exposed animals. The most remarkable differences occurred between month 1 a...Continue Reading

Methods Mentioned

BETA
light microscopy

Software Mentioned

LAS ( Leica Application Suite )
SPSS

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