Table 1: Histometric analysis within the area of interest ( = 6; %).

GroupNBA (%)RBA (%)BIC (%)NB-OB (%)OI-OB (%)

CMMean ± SD4.75 ± 1.1611.11 ± 5.0419.84 ± 4.2627.52 ± 4.6117.84 ± 4.61
Median4.839.9819.6028.3520.61
3D-PRTMMean ± SD35.86 ± 2.6519.35 ± 4.4761.97 ± 4.0370.33 ± 4.9462.00 ± 4.29
Median36.0319.8960.5369.1063.50
<.001<.001<.001<.001<.001

CM, collagen membrane; 3D-PFTM, three-dimensional preformed Ti-membrane; NBA, new bone area; RBA, remaining graft bone area; BIC, bone-to-implant contact; NB-OB, distance from the upper point of new bone to the old bone; OI-OB, distance from the upper point of the osseointegration to the old bone. The symbol “” indicates statistical significance between the two groups ().