What is periodontal disease staging?
Periodontal disease staging is a four-point grading scale veterinarians use to assess the severity of gum disease in companion animals based on clinical signs and radiographic findings.
Veterinarians in Denver and across the country rely on periodontal disease staging to communicate the extent of gum disease in dogs and cats. The staging system moves from 1 to 4, with each stage indicating how much damage has occurred to the gums, teeth, and supporting structures.
Stage 1 indicates early gingivitis. The gums appear inflamed and may bleed when probed, but no bone loss is visible on X-rays. At this point, the damage is reversible with proper cleaning.
Stage 2 marks the beginning of periodontitis. Bone loss of less than 25 percent is present, along with increased inflammation and possible early pocket formation. Plaque and tartar buildup is typically significant.
Stage 3 involves moderate bone loss (25 to 50 percent) and deeper gum pockets. The tooth roots may be partially exposed, and mobility may start to develop in affected teeth.
Stage 4 represents advanced periodontitis with more than 50 percent bone loss. Teeth are often loose or mobile, pockets are deep, and extraction may be necessary to prevent infection and pain.
Your veterinarian uses visual examination, probing measurements, and dental radiographs to assign a stage. Staging helps determine whether treatment can save the tooth through cleaning and management, or if extraction is the better option. Early detection and treatment slow disease progression, making staging essential for long-term oral health. A dental-focused veterinarian can explain your pet's specific stage and recommend next steps.