When compared to gingivitis, periodontitis indicates bone loss.
Periodontal disease is caused by bacteria.
Initially a pellicle forms on the clean tooth. Soon more bacteria adhere forming plaque. With in days the plaque thickens, underlying bacteria run out of oxygen and anaerobic motile rods and spirochetes begin to populate the subgingival area. Endotoxins released by the anaerobic bacteria cause tissue destruction and bone loss. Microscopic lesions have been found affecting dog s livers, kidneys, and brains in some animals with periodontal disease.