What is dental grading (stages 1-4)?
Dental grading (stages 1-4) is a veterinary classification system that scores the severity of periodontal disease in a pet's mouth, ranging from early gingivitis (stage 1) to advanced bone loss and tooth mobility (stage 4).
Vets in Austin and across the country use a standardized 1-4 dental grading scale to document and communicate the extent of periodontal disease during oral exams and cleanings. This staging system helps track disease progression and guides treatment decisions.
Stage 1 indicates early gingivitis with mild inflammation and plaque buildup, but no bone loss. Stage 2 shows early periodontitis with gum recession and up to 25 percent bone loss around tooth roots. Stage 3 involves moderate periodontitis with 25 to 50 percent bone loss visible on X-rays. Stage 4 represents advanced disease with more than 50 percent bone loss, tooth mobility, and potential tooth loss if left untreated.
Your veterinarian will examine each tooth, probe the gum line, and take radiographs to assign grades and spot problem areas. The grade determines whether professional cleaning alone is sufficient or if extraction becomes necessary to prevent pain and infection. Understanding these stages helps pet owners grasp why annual dental exams matter and why early intervention costs less than managing advanced disease. A general practice vet can perform routine grading and cleanings, though some cases require specialist referral.