Periodontal pocket formation which usually a scale of the disease process unless gingival recession accompanies attachment loss, in which case pocket depths may remain shallow, even in the presence of following attachment loss and bone loss. 5 According to disease severity, chronic periodontitis may be marked by mild (1 to 2mm), moderate (3 to 4 mm), or sever (>5mm) clinical attachment loss (CAL). Chronic periodontist may be distinguished as being localized or generalized. Localized periodontitis occurs when less than 30% of the sites assessed in the mouth demonstrate attachment loss and bone loss while generalized periodontitis occurs when 30% or more of the sites assessed in the mouth are affected. 7
