When the alveolar crest appears to be parallel to a line drawn between the cementoenamel junctions of adjacent teeth, reduction in height of the interdental septum is known as which of the following:

A series of proteins circulating in the blood that work to facilitate phagocytosis or kill bacteria directly by puncturing bacterial cell membranes is known as:    

The color of the gingiva is dependent upon vascularity plus 

Long, fine, wavy filamentous structures that are used for motility

The principal antibody in tears and saliva is    

Tobacco use is related to an increased risk for severe periodontal disease. Smokers have a diminished neutrophil function.

A bacterial product that attracts leukocytes to an area of irritation is  

Which of the following stages of gingivitis is the earliest clinical evidence of gingivitis?

The width of attached gingiva is determined by subtracting the sulcus depth from the total width of keratinized gingiva.  

Which of the following layers of subgingival plaque activates the host response resulting in the most destructive processes seen in periodontal disease?