A 22-year-old and 66-year-old patient present with the same amount of bone loss, the same bleeding on probing, and the same amount of calculus. Which patient has the WORSE prognosis?

Correct answer: D. The 22-year-old — same damage in less time indicates more aggressive disease

• A. The clinical information given is sufficient to make a comparative judgment — age is a key modifier.
• B. The 66-year-old has had 44 more years for the disease to develop — the damage level is expected. It does not indicate aggressive disease.
• C. The prognosis is NOT equal — timing and rate of bone loss are critical prognostic factors.
• D. Correct. The 22-year-old presenting with the same bone loss as a 66-year-old has lost an equivalent amount of bone in a much shorter time period. This indicates a much more rapid and aggressive form of periodontitis, making the younger patient's prognosis worse.