How is pocket depth defined and what value indicates periodontal disease in small animals?

How is pocket depth defined and what value indicates periodontal disease in small animals?

• A. Pocket depth is the distance from the crown to the gingival margin; depths greater than 2 mm indicate disease.
• B. Pocket depth is the distance from the gingival margin to the base of the pocket; depths greater than 3 mm indicate periodontal disease.
• C. Pocket depth is the depth of calculus on the crown; depths greater than 4 mm indicate disease.
• D. Pocket depth is the thickness of gingival tissue apically; depths greater than 1 mm indicate disease.

Answer: (B)