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In this video, we dive into the clinical anatomy, diagnosis, and effective treatment options for **oro‑antral fistula (OAF)**—a persistent connection between the maxillary sinus and the oral cavity. ✅ What You Will Learn: • Difference between oro‑antral communication (OAC) and OAF • Causes—mostly extractions of upper molars or premolars and sinus trauma • When an OAC becomes epithelialized (after ~48–72 hours) and needs intervention • Indications for conservative management vs. surgical flaps • Surgical flap options: buccal advancement, buccal fat pad flap, palatal rotational flap—pros, cons, and expected outcomes • Postoperative care and sinus precautions 💡 Why It Matters: Untreated OAF can lead to chronic sinusitis, infection, and reduced quality of life. Timing is key—closing within 24–48 hours yields success rates up to 90‑95%, while delayed repair success falls to ~67% . Best Practices: • Pre-op treatment of any sinus infection • Careful de-epithelialization of the tract • Patient instructions: avoid nose‑blowing, use soft diet, maintain oral hygiene. 🔔 Don’t forget to *like, comment, and subscribe* for more such content.