Objective: This study aims to clarify to the dentist about the possible etiological factors responsible for such complication, to identify its clinical and radiographic signs and to describe the surgical technique adopted in these cases. Case Report: For this purpose, the authors present the clinical case of a patient with post-exodontia oroantral fistula of the right permanent maxillary first molar. The proposed treatment was the closure of the fistula under local anesthesia using the Bichat adipose body, with advantages of being a simple procedure, easy to perform, that does not require specific material, minimal complications, low morbidity and can be performed in the own dental practice and with high success rates proven by several studies. Discussion: The oroantral fistula is a common pathological occurrence in the dental clinic, characterized by communication of the maxillary sinus with the oral cavity when the maxillary sinus is pneumatic or during dental extractions of upper posterior elements whose roots are closely related to the maxillary sinus. Conclusion: Communications should be treated immediately, if there are signs of inflammation it should be treated first, so that surgical correction can be performed later.

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Included teeth are all the dental elements that arrive the normal time of its eruption, remains immersed within the tissues. Usually found when missing a tooth, or on routine radiographic examinations. In the presence of included teeth, it is necessary to define the best treatment approach, whether it is surgical, through exodontia, or by orthodontic tracings. Inclusive canines, in the symphysis region and near the base of the mandible, are rare and make the use of orthodontic traction techniques contraindicated. Presence of teeth in the intraosseous ectopic position can cause injuries, such as alveolodentary ankylosis, calcium metamorphosis of the pulp and aseptic pulp necrosis, among others. Anamnesis, physical examination (intra- and extraoral) and radiographic examinations such as panoramic, periapical, computed tomography, and occlusal radiographs should be performed to make the diagnosis adequate. In general, the success of the treatment depends on the age of the patient and the position of the canines at the time of the surgical procedure. The objective of this work is the extraction of a lower canine with extra-oral access in an outpatient clinical setting under local anesthesia.