For Clinicians
The periodontal stage and grade classification system provides a standardized framework for evaluating disease severity (Stage) and progression risk (Grade).
Stage reflects the level of structural damage, including attachment loss, bone loss, and tooth loss risk.
Grade captures how quickly the disease is expected to progress, and integrates factors like smoking, diabetes, and other biomarkers.
This system helps align treatment planning, recall intervals, and potential specialist referrals.
Biomarkers (if available via salivary or medical diagnostics) such as HbA1c, inflammatory cytokines, or smoking exposure can enhance grade classification accuracy.
Recommended use:
Stage I-II: Localized SRP, reinforce oral hygiene
Stage III-IV: Periodontist referral, potential surgical therapy
Grade B-C: Shortened recall intervals, tailored home care
For Patients
Your gum health has been classified based on two factors:
Stage: How much damage has already happened
Grade: How quickly your condition may get worse
Think of this like knowing both how steep the hill is (Stage) and how fast your bike is rolling down it (Grade).
Key takeaway:
Stage I or II: Early damage — good time to stop it from progressing
Stage III or IV: More serious — may need help from a specialist
Grade A: Very stable
Grade C: Progressing faster — we’ll work with you to slow it down