Fig. 7
From: A technical note on contamination from PRF tubes containing silica and silicone
Experimental setup describing the orientation of PRF membranes during histological assessment. The proximal surface describes the inner tube wall (generally receiving the smallest g-force), whereas the distal surface is the outer tube wall, where cells generally accumulate during centrifugation at high g-force. a Regions in compressed A‐PRF or CGF matrix. This image is the proximal surface. b Centrifugal force and distal and proximal surfaces of A‐PRF or CGF matrix. A‐PRF, advanced platelet-rich fibrin; CGF, concentrated growth factors. Reprinted with permission from Takahishi et al. 2019 [14]