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In recent years concerns have been expressed about adverse health effects from amalgam dental restorations...

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In recent years concerns have been expressed about adverse health effects from amalgam dental restorations which include mercury The table below shows results from a study in which some patients were treated with amalgam restorations and others were treated with composite restorations that do not contain mercury based on the data from Neuropsychological and Renal Effects of Dental Amalgam in Children by Bellinger et al Journal of the American Medical Association Vol 295 No 15 Use a 0 05 significance level to test for independence between the type of restoration and sensory disorders Amalgam Dental Restorations Sensory Disorder No sensory disorder Amalgam Composite 36 231 28 239 O There is sufficient evidence to warrant rejection of the claim of independence between the type of restoration and adverse health conditions O There is not sufficient evidence to support the claim of independence between the type of restoration and adverse health conditions There is sufficient evidence to support the claim of independence between the type of

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