The Effect of Certain Lubricating Agents and Coarse Foods Upon the Cornification of the Oral Mucosa of the White Rat

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Abstract
Addition of 10% vegetable oil to dried whole kernel corn and corn meal diets was seen to antagonize their dehydrating and compressing effects upon the mandibular gingiva of the albino rat. The stratum corneum of these animals consisted of large polygonal cells with distinct cell boundaries, and the stratum spinosum was composed of large cells with deeply staining centrally placed nuclei. This was in contrast to the stratum corneum of the corn-fed animals which was on the avg. 10/x less in height and consisted of dehydrated, compressed cells with indistinct cell outlines. The stratum spinosum consisted of small, finely granular cells. Identical results were obtained when liquid petrolatum was substituted for mineral oil, possibly indicating that the action of vegetable oil is a local one and is probably due to its lubricating property. The oils probably act to prevent cell dehydration, and the cells remain soft and full of cytoplasm.

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