Abstract
Fifty-four specimens from forty-one patients were studied to explore the relation of the residual microbial flora and papillary hyperplasia. The total aerobic and anaerobic microbial counts of tissues from PEH lesions were significantly higher than the comparable counts from nonpathologic palatal tissues adjacent to the lesions and from nonpathologic palatal tissue from other denture and nondenture patients. No significant differences were found in the frequency of isolation of any specific type of microorganism differentiated among the palatal tissues studied (PEH pathologic tissue, PEH control tissue, denture control tissue, and nondenture control tissue).
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