Fig. 3

Representative images of coronal-sectional CBCT scans from sinuses with thickened MT in the pre- and 6 months post-extraction of the test and control groups. a Pre-extraction maxillary sinus with thickened MT of the test group. b Pre-extraction maxillary sinus with thickened MT of the control group; c 6 months post-extraction of the test group; d 6 months post-extraction of the control group