The accidental displacement of teeth into the maxillary sinus during extractions is rare but can have serious consequences. Due to their proximity to the sinus, this mostly happens during maxillary molar extractions. Developmental disorders, iatrogenic events, trauma, or pathological processes such as tumours or cysts can cause ectopic tooth eruption in the maxillary sinus. In certain situations, a tooth may become ectopic if associated with a follicular cyst that grows toward the maxillary sinus and perforates its membrane. Maxillary sinusitis, characterized by symptoms such as nasal congestion and sinus pressure, can be caused by tooth displacement. Treatment decisions depend on the severity of symptoms and the presence of infection or inflammation. Displacement of a tooth into the maxillary sinus without causing inflammation may justify its retention, while inflammation may necessitate its removal. An accurate diagnosis depends on advanced radiologic tools such as Computed Tomography (CT) or Cone-beam CT (CBCT) to precisely locate the displaced tooth and assess sinus pathology. Retrieval of a displaced tooth typically requires surgical intervention, such as the Caldwell-Luc technique, exploration by transalveolar or endoscopic approaches. Timely and appropriate management, including close monitoring and skilled surgical intervention, is crucial for positive outcomes. This emphasizes the importance of precise tooth extractions and the need for expert surgical skills when addressing tooth displacement into the maxillary sinus.