Objective: To evaluate the clinical outcomes following extraction of impacted maxillary tooth adjacent to maxillary via submaxillary sinus membrane space approach.
Materials And Methods: Seventy-two patients were enrolled in our study. The positions of the maxillary impacted tooth were confirmed by cone-beam computed tomography (CBCT). Cases were randomly divided into two groups: the "submaxillary sinus membrane space approach" was applied in the new method (NM) group, and the conventional "avoid maxillary sinus membrane exposure" strategy was executed in the traditional method (TM) group. The clinical and follow-up data were recorded.
Results: The duration of the procedure in the TM group was significantly longer than those in the NM group (P < 0.05). Four teeth were accidentally displaced into the maxillary sinus with MSM perforation. The MSM perforation rate was slightly higher in the TM group than in the NM group, however, without significant difference between the two groups (8/36 vs. 3/36, P = 0.19). The maxillary sinus membrane perforation was associated with the displacement of tooth into the maxillary sinus (OR = 16.2, P = 0.026). The root tip exposure of the adjacent tooth was significantly higher in the TM group than in the NM group (10/36 vs. 1/36, P = 0.006). The incidence of reduced pulp vitality of the adjacent tooth was significantly higher in the TM group (10/36 vs. 1/36, P = 0.006), and it was associated with the exposure of the root tip intraoperatively (OR = 456.5, P < 0.001). The incidence of external root resorption was significantly lower in the NM group, and there was no significant association with the root exposure intraoperatively (OR = 3.7, P = 0.47).
Conclusions: Submaxillary sinus membrane space approach is a safe and efficient approach in extraction of impacted maxillary tooth. It is an alternative way for cases which are in close proximity to the maxillary sinus.
Clinical Relevance: A novel method to extract impacted maxillary tooth adjacent to maxillary sinus.
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