The lateral periodontal cyst and isolated periodontal defects

Over a period of 4 years, 41 isolated, advanced periodontal defects were selected for histologic examination. The objective of this study was to establish the presence of cystic epithelium. Twenty of the biopsies fulfilled the criteria for lateral periodontal cyst (LPC). These results indicate that there is a distinct possibility that proliferation of epithelial elements other than crevicular could be implicated in isolated periodontal defects.