Abstract
That galvanic currents generated by dissimilar metals used for the purpose of dental fillings, crowns and bridgework may cause lesions of the mucous membrane of the oral cavity has been noted previously by Fitzwilliams,<sup>1</sup>Lain<sup>2</sup>and Hollander.<sup>3</sup> The following report adds another clear-cut demonstration of that contention: <h3>REPORT OF CASE</h3><h3>History.</h3> —G. R., a married man, aged 40, white, an electric welder, referred to the Pittsburgh Skin and Cancer Foundation, July 2, 1932, by Dr. P. J. Zeedick, presented six faceted lesions on the margin and tip of the anterior third of the tongue. Although this entire area of the tongue was swollen and reddened, each lesion was distinct and separate and conformed in shape to the lingual surfaces of the upper anterior teeth. The center of each of these six lesions was depressed, and the borders were raised above the surrounding inflamed mucous membrane covering of
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