Immunoglobulin most commmon in Periodontitis

#Which immunoglobulin is most common in patients with periodontal disease?
A. IgA
B. IgD
C. lgG
D. lgE
E. IgM 

The correct answer is C. IgG. 

The presence of IgG in gingival crevicular
fluid is a product of actively secreting plasma cells stimulated by chronic plaque/calculus accumulation. 

The next abundant type is IgA, There is a negligible amount of lgM.

lg A predominates in saliva to agglutinate
bacteria so they are more easily swallowed
and evacuated from the oral cavity.

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