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A: Sagittal incision on rabbit dorsum; B: Five-centimeter sagittal incision to periosteum; C: Detachment of periosteum to expose bone suture on the midline and anterior walls of both maxillary sinuses; D: Rectangular bone-mucosal fap produced with chisel and hammer; E: Placement of prednisolone-eluting biodegradable implant in left maxillary sinus; F: Bone fap in place.
