Amalgam dental fillings and hearing loss

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*Amalgam dental fillings and hearing loss*

Rothwell JA, Boyd PJ., Audiology Department, General Hospital, St.

Helier, Jersey, Channel Islands.

Int J Audiol. 2008 Dec;47(12):770-6.

In this study we investigated the effects of amalgam dental fillings

on auditory thresholds. Participants (n=39) were non-smoking women

age 40 to 45. Regression and correlation analyses were performed

between auditory thresholds, measured from 0.25 to 16 kHz, and the

number/surface area of dental fillings, using the ASHA criteria for

ototoxic change as a reference for comparison. No significant

correlation (p>0.05) was found between composite (non-amalgam)

filling or drilling data and auditory thresholds. However, there was

a significant positive linear correlation between amalgam filling

data and auditory thresholds at 8, 11.2, 12.5, 14, and 16 kHz. The

strongest association (r=0.587, n=39, p<.001, r(2)=0.345) was at 14

kHz, where each additional amalgam filling was associated with a 2.4

dB decline in hearing threshold (95% confidence interval [CI],

1.3-3.5 dB). The results suggest an association between more amalgam

fillings and poorer thresholds at higher frequencies, which could

contribute to presbyacusis in developed countries. This provides

further argument for the use of amalgams to be phased out where

suitable alternatives exist.

http://www.ncbi.nlm.nih.gov/pubmed/19085401?dopt=AbstractPlus

.

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CSN - Chemical Sensitivity Network

Silvia K. Müller

Mühlwiesenstr. 2

55743 Kirschweiler

Germany

Tel: 06784-9839913

Fax: 06784-9839919

www.csn-deutschland.de <http://www.csn-deutschland.de>

www.csn-deutschland.de/blog/ <http://www.csn-deutschland.de/blog/>

CSN Info-Flyer:

www.csn-deutschland.de/csn_flyer.html

<http://www.csn-deutschland.de/csn_flyer.html>

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*Amalgam dental fillings and hearing loss*

Rothwell JA, Boyd PJ., Audiology Department, General Hospital, St.

Helier, Jersey, Channel Islands.

Int J Audiol. 2008 Dec;47(12):770-6.

In this study we investigated the effects of amalgam dental fillings

on auditory thresholds. Participants (n=39) were non-smoking women

age 40 to 45. Regression and correlation analyses were performed

between auditory thresholds, measured from 0.25 to 16 kHz, and the

number/surface area of dental fillings, using the ASHA criteria for

ototoxic change as a reference for comparison. No significant

correlation (p>0.05) was found between composite (non-amalgam)

filling or drilling data and auditory thresholds. However, there was

a significant positive linear correlation between amalgam filling

data and auditory thresholds at 8, 11.2, 12.5, 14, and 16 kHz. The

strongest association (r=0.587, n=39, p<.001, r(2)=0.345) was at 14

kHz, where each additional amalgam filling was associated with a 2.4

dB decline in hearing threshold (95% confidence interval [CI],

1.3-3.5 dB). The results suggest an association between more amalgam

fillings and poorer thresholds at higher frequencies, which could

contribute to presbyacusis in developed countries. This provides

further argument for the use of amalgams to be phased out where

suitable alternatives exist.

http://www.ncbi.nlm.nih.gov/pubmed/19085401?dopt=AbstractPlus

..

--

CSN - Chemical Sensitivity Network

Silvia K. Müller

Mühlwiesenstr. 2

55743 Kirschweiler

Germany

Tel: 06784-9839913

Fax: 06784-9839919

www.csn-deutschland.de <http://www.csn-deutschland.de>

www.csn-deutschland.de/blog/ <http://www.csn-deutschland.de/blog/>

CSN Info-Flyer:

www.csn-deutschland.de/csn_flyer.html

<http://www.csn-deutschland.de/csn_flyer.html>