Based on the Cairo classification of gingival recession shown, a recession that presents WITHOUT interproximal clinical attachment loss belongs to which type?

Correct answer: D. Cairo Type 1

• A. INCORRECT — Cairo Type 3 (RT3) is recession WITH interproximal clinical attachment loss that is GREATER THAN the buccal attachment loss. This represents the worst prognosis for root coverage.
• B. INCORRECT — Miller's classification is an older system; the question specifically shows the Cairo (RT) classification.
• C. INCORRECT — Cairo Type 2 (RT2) is recession WITH interproximal clinical attachment loss that is LESS THAN OR EQUAL TO the buccal attachment loss.
• D. CORRECT — Cairo Type 1 (RT1) is gingival recession WITHOUT clinical attachment loss at the interproximal sites. The CEJ is not detectable at the mesial or distal of the affected tooth. This is the most favorable recession for root coverage procedures.