During flap elevation, the flap should be tightly adhered at which junction?

• A. Mucogingival junction
• B. Alveolar crest
• C. Gingival margin
• D. Cementoenamel junction

Answer: (A)

The main idea is where the flap gains its firm, stable base. During flap elevation, you want the mucoperiosteal flap to be tightly adhered at the mucogingival junction because this boundary marks the transition from attached, keratinized gingiva to movable alveolar mucosa. That junction provides a stable, well-vascularized base for the flap, allowing secure adaptation and suturing with minimal tension, which promotes predictable healing and reduces the risk of tearing or recession.

The other landmarks aren’t where the flap is intended to anchor for this purpose: the gingival margin is merely the free edge of the tissue, the cementoenamel junction is a tooth-root landmark, and the alveolar crest is a bone level rather than a soft-tissue adhesion point.