It is axiomatic that the easiest way to manage an oroantral complication is to prevent it from happening. Prevention of any dental complication is best accomplished by comperhensive treatment plan. Oroantral complications usually result from surgery in the posterior maxilla, including sinus perforation due to removal of teeth, tuberosity reduction, root displacement into maxillary sinus, or other procedures that cause communications between the oral cavity and the maxillary sinus. Periapical disease (acute or chronic), endodontic procedures and periodontal disease may also affect maxillary sinus. Conservative treatment of these complications includes medications, to help lessen the possibility that maxillary sinusitis occur, and acrylic splint in order to facilitate closure of oroantral communication (if such occured). Antibiotics, usually amoxicillin or clindamycin, should be prescribed for 5 days to prevent infection of maxillary sinus. In addition, a nasal decongestant should be prescribed to shrink nasal mucosa, and to lessen nasal and sinus secretions. Skillful management of complications when they occur is the sine qua non of the responsible dentist. The dentist who anticipates a high probability of a specific complication should inform the patient and explain the anticipated menagement and sequelae.