teeth. the marginal gingiva has a more translucent appearance than the attached gingiva, yet has a similar clinical appearance, including pinkness, dullness, and firmness. in contrast, the marginal gingiva lacks the presence of stippling, and the tissue is mobile or free from the underlying tooth surface...
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anywhere in our environment. there are two challenges at the heart of the plastic waste issue: lack of adequate infrastructure and systems to collect and manage household and municipal waste, and that society does not recognize waste as a valuable resource. research by the ocean conservancy shows that plastics...