Which statement about Code 0 in PSR is correct?

Which statement about Code 0 in PSR is correct?

• A. It indicates gingival recession is present.
• B. It indicates the presence of calculus.
• C. It indicates bleeding on probing.
• D. It indicates a healthy periodontium with no bleeding on probing, no calculus, no defective margins, and pocket depths ≤3.5 mm.

Answer: (D)

Code 0 in PSR represents a healthy periodontium. It means there is no bleeding on probing, no calculus, no defective margins, and pocket depths are 3.5 mm or less in that sextant. This combination reflects the absence of signs of periodontal disease in that area, so it’s the description that best matches Code 0. If any of those features were present—bleeding on probing, calculus, defective margins, or deeper pockets—the code would be higher, not 0. The statement that describes a healthy periodontium with no bleeding on probing, no calculus, no defective margins, and pocket depths ≤3.5 mm is the correct one.

Code 0 in PSR represents a healthy periodontium. It means there is no bleeding on probing, no calculus, no defective margins, and pocket depths are 3.5 mm or less in that sextant. This combination reflects the absence of signs of periodontal disease in that area, so it’s the description that best matches Code 0. If any of those features were present—bleeding on probing, calculus, defective margins, or deeper pockets—the code would be higher, not 0. The statement that describes a healthy periodontium with no bleeding on probing, no calculus, no defective margins, and pocket depths ≤3.5 mm is the correct one.