Case Report
Copyright ©The Author(s) 2019.
World J Clin Cases. May 26, 2019; 7(10): 1234-1241
Published online May 26, 2019. doi: 10.12998/wjcc.v7.i10.1234
Figure 2
Figure 2 Intraoperative illustrations to explain each step of the surgery. A: Establishment of a punch incision; B: Full-thickness keratinized gingival punch removal; C: Gentle elevation of the Schneiderian membrane till approximately 7 mm; D: An endoscope was used to monitor the maxillary sinus membrane.