Management of Dental Implants Displaced into the Maxillary Sinus: A Case Report Presenting Critical Clinical Considerations

Abstract

Implant displacement into the maxillary sinus is a rare but potentially serious complication associated with posterior maxillary atrophy and inadequate primary stability. Proper diagnosis and timely surgical management are essential to prevent chronic sinus disease. A 44-year-old female patient presented with two dental implants displaced into the left maxillary sinus eight months after placement, associated with recurrent sinusitis, facial swelling, and an oroantral communication. Cone beam computed tomography confirmed the intranasal position of the implants and sinus mucosal thickening. Surgical removal was performed through a lateral maxillary sinus approach under local anesthesia, followed by irrigation and closure with a resorbable collagen membrane. Postoperative management included antibiotics, analgesics, and anti-inflammatory medication. The follow-up up to 24 months demonstrated complete resolution of symptoms and stable healing without recurrence or functional impairment.

Clinical application: An invasive surgical approach is feasible to remove an intrasinusal dental implant.