The amelocemental junction lies at the top of the picture covered by plaque and calculus that extends into the upper pocket. The epithelium of the pocket is hyperplastic and irregular but the epithelial attachment is tighly apposed to the cementum. The alveolar crest shows resting and reversal lines indicating remodelling. A broad band of uninfl amed densely fi brous tissue, almost scar tissue, separates the bone from the infl amed tissue.