Fig. 2
From: Osteoconductive properties of upside-down bilayer collagen membranes in rat calvarial defects
Ex vivo μCT overview of the calvarial defect anatomy after 4 weeks of healing. Critical size defects (d = 5 mm) were covered using native resorbable bilayer collagen membranes placed regularly or upside-down. Representative samples of minimal, median, and maximal bone coverage of the defect in the respective groups are shown. Anterior is left. μCT, micro-computed tomography