Adverse Effects of Low Frequency Noise on Alveolar Bone of Mice, an Unseen Dilemma (original) (raw)
Related papers
Journal of Indian Society of Periodontology, 2014
Introduction: Exposure to noise rich in low frequency components induces abnormal proliferation of extracellular matrix and collagens. The previous studies have shown alterations in the periodontium of both humans and animals. Our objective was the evaluation of collagens I, IV and V of the periodontium of Wistar rats exposed to noise rich in low frequency components. Materials and Methods: 5 groups (each with 10 animals) were exposed to continuous low frequency noise (LFN). The LFN, from previously recorded white noise, frequency filtered and amplified, was applied in growing periods of 1, 3, 5, 9 and 13 weeks, in order to characterize the alterations with exposure time. A control group of ten animals was kept in silence. These animals were used in groups of 2 as aged-matched controls. After exposure, sections were obtained including teeth, alveolar bone and periodontium and observed after immunollabeling for collagens I, IV and V. Results: A significant increase in collagen I was observed in exposed groups (P < 0.001) (Kruskal-Wallis test). Post-hoc comparisons (Mann-Whitney test with Bonferroni correction) showed an increase in collagen I in animals exposed for 3 weeks or more (P < 0.001). The same test was applied to collagen V where significant differences were found when comparing control and exposed groups (P ≤ 0.004). The t-test for independent samples was applied to collagen type IV where no significant differences were found (P = 0.410), when comparing to the control group. Discussion: As in other organs, we can observe fibrosis and the newly formed collagen is likely to be "nonfunctional," which could have clinical impact. Conclusion: Noise may constitute a new comorbidity for periodontal disease.
Frontiers in Oral Health
Morphological changes induced by industrial noise have been experimentally observed in several organs. This study aims to characterize the effect of industrial noise on the pulp cell density of Wistar rats from a histological point of view, through qualitative and quantitative analysis. The histologic sections were observed over the optical microscope and photographed using 10x and 40x magnifications and analyzed using an image processing software. They refer to a group of animals exposed to industrial noise for 3 months and for 7 months (EG) and another group of animals kept in silence for control (CG) during the same periods. There was a significant decrease in pulp cell density in teeth of the animals exposed for 3 months when compared to control teeth group (p = 0.01). However, in the group exposed for 7 months, no statistically significant differences were found (p = 0.66). Even so, we found an evident relationship between exposure to industrial noise and teeth morphological ch...
2000
O presente estudo teve por objetivo avaliar radiograficamente, os efeitos provenientes da adaptação da ligadura durante a indução da doença periodontal em ratos. Para este estudo foram usados 30 ratos. No primeiro molar inferior foi adaptada uma ligadura a qual foi distribuída de forma randômica, entre o lado direito e esquerdo. O lado sem ligadura foi utilizado como controle (negativo). Logo após a adaptação da ligadura, esta foi removida. Os animais foram sacrificados no período de 0, 3 e 7 dias, tendo dez animais por período. Desta forma as mandíbulas foram removidas, separadas e fixadas em formol. As hemimandíbulas foram radiografadas e analisadas pelo sistema de imagem digital Digora, onde à distância da união cemento-esmalte à crista óssea alveolar foi mensurada em mm por um traçado linear. Os dados coletados não indicaram diferença estatisticamente significante entre os grupos e períodos experimentais analisados pelo teste T de student (p>0,05). Dentro dos limites deste estudo e da metodologia utilizada podemos concluir que a ligadura não traumatiza os tecidos periodontais e por si só não leva ao desenvolvimento da doença periodontal em ratos.
2013
BACKGROUND: Vibroacoustic disease (VAD) is a systemic pathology caused by excessive exposure to low frequency noise (LFN). Until 1987, it was thought that the pathological effects of excessive LFN exposure were limited to the realm of cognitive and neurological disturbances. After the autopsy findings in a deceased VAD patient, it became clear that LFN impinges on the entire body, particularly the cardio-respiratory systems. In 1992, rodents were exposed to LFN, and the respiratory tract was studied through scanning and transmission electron microscopy. Pericardial, tracheal and lung fragments, removed with informed consent from VAD patients, have also been studied with light and electron microscopy. This report summarizes what is known to date on the tissue and cellular response to LFN exposure. TUBULIN-BASED STRUCTURES: Cilia are tubulin-based and exist in normal pericardia as well as in the respiratory tract. In VAD patients, pericardial cilia cease to exist, while tracheal and b...
Effects of long-term construction noise on health of adult female Wistar rats
Polish Journal of Veterinary Sciences, 2017
The aim of this study was to investigate the influence of long-term building construction noise from refurbishment, which including vibration, on some physiological parameters and histopathological changes of organs of Wistar rats. Twenty 12 month old female rats were divided into two groups: rats group I (n = 10) were exposed to long-term construction noise and rats group II (n = 10) were kept under normal noise level. Study results revealed that long-term construction noise from building refurbishment has an influence on body weight, haematological and some serum biochemical parameters affects caecal microbiota, and causes histopathological changes in the organs of adult female Wistar rats. It was noticed that rats in group I exihibited significantly higher mean values for total protein, albumin and lower values for glucose, AST, ALT, blood urea nitrogen, haematological and caecal microbiota parameters than rats in group II. The most common pathologies were determined in the kidne...
ICBEN review of research on the biological effects of noise 2011-2014
Noise & health
The mandate of the International Commission on Biological Effects of Noise (ICBEN) is to promote a high level of scientific research concerning all aspects of noise-induced effects on human beings and animals. In this review, ICBEN team chairs and co-chairs summarize relevant findings, publications, developments, and policies related to the biological effects of noise, with a focus on the period 2011-2014 and for the following topics: Noise-induced hearing loss; nonauditory effects of noise; effects of noise on performance and behavior; effects of noise on sleep; community response to noise; and interactions with other agents and contextual factors. Occupational settings and transport have been identified as the most prominent sources of noise that affect health. These reviews demonstrate that noise is a prevalent and often underestimated threat for both auditory and nonauditory health and that strategies for the prevention of noise and its associated negative health consequences ar...
Industrial noise and tooth wear - experimental study
International journal of medical sciences, 2015
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…
Noise levels encountered in university dental clinics during different specialty treatments
Journal of Family Medicine and Primary Care, 2021
Background: Noise levels encountered during the dental treatments in different departments have deleterious effects on the ears of dental healthcare providers and there is scarcity of data in the literature in Saudi Arabia. Hence, the aim of the study was to determine the noise levels resulting from the usage of different specialty instruments and equipment. Material and Methods: A cross-sectional study was conducted to measure the level of noise produced by different specialty instruments and equipment within the dental clinics of the College of Dentistry, Riyadh Elm University (REU), Riyadh. The noise produced during the restorative treatments, endodontics and prosthodontics was recorded objectively using a decibel (dB) meter placed at a distance of 30 cm from the operator's ear. Mean noise levels were calculated and compared among the various specialty treatments using Analysis of Variance (ANOVA). Furthermore, Tukey's test was applied to perform a pairwise comparison between the groups. Results: An overall noise of 73.83 ± 4.39 dB was found to be generated within the dental clinical setting. A highest sound level of 79.44 ± 2.10 dB was observed during restorative treatment followed by 74.14 ± 3.08, 73.22 ± 1.93, 71.39 ± 3.37 and 70.97 ± 4.70 dB for endodontic, periodontal, and prosthodontic treatments, respectively. A statistically significant difference was observed in the noise levels produced from the different specialty treatments (P = 0.000). Conclusion: The greatest noise level was recorded with the use of the amalgamator in restorative dental treatment. It was inferred that the noise emanating from all the specialty dental treatments was below the hazardous levels. Long-term exposure may, however, have adverse effects on auditory as well as general health.
The Effect of Noise-Induced Hearing Loss on Dentists
This paper presents noise problems associated with the use of air-turbine drills in dental practice. Two hundred and fifty dentists (male and female) were randomly selected from the faculty of dentistry as well as the dentists who worked private in Tehran. The results indicated that the mean value of sound pressure level produced by the high-speed drills was 69.1 db. Most of the energy from the drills lied in the high frequency range, 6000-8000 Hertz. Audiological evaluations showed that the loss of hearing in all age groups and years in dental practice lie in 6000 Hertz which has a positive correlation with the value of sound pressure level in this frequency. The hearing loss in the right ear of women was slightly higher than the left one, while this was not true in men. The hearing loss in the female group was greater than in male group.