0 - No pockets >3.5 mm, no calculus/overhangs, no bleeding after probing; 1 - No pockets >3.5 mm, no calculus/overhangs, but bleeding after probing; 2 - No pockets >3.5 mm, but supra- or subgingival calculus (SC) /overhangs; 3 - Probing depth 3.5-5.5 mm; 4 - Probing depth >5.5 mm; * - Furcation involvement