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International Journal of Implant Dentistry
Fig. 1 | International Journal of Implant Dentistry

Fig. 1

From: Tomographic evaluation of the influence of the placement of a collagen membrane subjacent to the sinus mucosa during maxillary sinus floor augmentation: a randomized clinical trial

Fig. 1

T0, coronal view of a no-membrane CBCT; X, line drawn following the floor of the nose; C, center of the bony crest; F, base of the sinus floor; PNR, palatal-nasal recess. X-F, nasal floor height; XW (sinus width), distance evaluated on the line X between the two intersection points with the medial and lateral sinus bone walls; T0 X-Area, area delimited by the sinus bone walls and the line X. The PNR angle is indicated in yellow

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