Which stage of periodontal disease is reversible?

• A. Stage 2
• B. Stage 3
• C. Stage 1
• D. Stage 4

Answer: (C)

Reversibility depends on whether the disease has caused loss of the supporting structures. Stage 1 is gingivitis, where there is gingival inflammation (and possibly bleeding) but no attachment loss or bone loss. At this stage the tissues can heal completely once plaque and irritants are removed and good plaque control is maintained. Therefore, Stage 1 is the reversible stage.

Once attachment loss and bone destruction occur, the structural damage is not fully reversible, though treatment can halt progression and improve the tissue environment. In veterinary practice, catching the disease at Stage 1 and performing thorough cleaning, debridement, and enhanced home care can restore health, whereas later stages require ongoing management.