Retrieval of root fragment in maxillary sinus via anterolateral wall of the sinus to preserve alveolar bone.

Purpose: The objective of this study was to present a functional surgery for retrieval of displaced root fragments from the maxillary sinus while preserving the alveolar bone.
Materials and Methods: Twenty-one patients with associated root fragments displaced into the maxillary sinus after tooth extraction were collected and reviewed retrospectively. All patients included in the study were subjected to surgical removal of the displaced root by the use of piezosurgery. In case the root fragment was barely detectable, endoscopy would be helpful.
Results: Eleven roots were removed via small windows and 10 roots via large windows. Endoscopy was used in 2 patients. Granulomatous tissues were found around 6 root fragments, and cyst formation was found in 1 patient. Only 1 patient had sinusitis temporarily. No patients developed complications such as facial paresthesia, facial asymmetry, or infection.
Conclusions: The functional surgery for the retrieval of a displaced root from the maxillary sinus is recommended owing to quick recovery, preservation of alveolar bone, and minimal complications.