Cierre de comunicación bucosinusal con colgajo de bolsa adiposa de Bichat

Buccal sinus communications (CBS) are pathological anomalies that are distinguished by the incorrect connection between the oral cavity and the maxillary sinus, usually arising after the extraction of upper third molars, due to the intimate anatomical relationship between the posterior dental roots and the maxillary sinus. Once this condition is detected, its adequate solution is crucial to avoid complications such as chronic sinus infections, maxillary sinusitis or the appearance of persistent oroantral fistulas. There are several treatment alternatives, either surgical or non-surgical, for the treatment of SBC. The most commonly used surgical procedures include the use of soft tissue flaps, bone grafts, regenerative biomaterials and the Bichat Bag flap, a biocompatible option that promotes closure of the communication without causing tension in the impacted area. The purpose of this research is to present a clinical case on the use of the Bichat pocket flap in the surgery of buccosinusal communications, highlighting its effectiveness and benefits in aspects of biocompatibility, vascularization and ideal healing. The study was conducted by reviewing scientific literature, including theses, scientific publications, clinical case reports and relevant literature reviews of the last five years. The results of this study indicate that the application of the Bichat Bag flap is an effective, safe and expected surgical alternative for the treatment of SBC, reducing postoperative complications and promoting tissue regeneration in the affected area.