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First, misclassification of smoking status may have occurred due to the nature of self-reported data

This suction effect is similar to drinking through a straw, which dentists also prohibit after extractions for the same reason

Engaging in regular physical activity at the levels recommended by the Centers for Disease Control and Prevention (CDC) can reduce the risk of nine different types of cancer, with research indicating that over 46,000 US cancer cases annually could potentially be avoided if everyone met the recommended CDC guidelines for physical activity (see Sidebar 11 ) (248)(249)

Smokers are also at a higher risk of infection, because your gums may not be able to heal properly