Fig. 1From: Palatal window osteotomy technique improves maxillary sinus augmentation in previously insufficient augmentation casePreoperative radiographic images. a Orthopantomography shows that inadequate bone height was observed in sites #24 (blue line) and #26 (red line). b Coronal CT image of the blue line; vertical bone height is 4 mm. c Coronal CT image of the red line; vertical bone height is only 1 mmBack to article page