Figure 10.
Bone quality according to Lekholm and Zarb classification.
A = D1 on the CBCT cross-sectional image (mental region EJS); B = D2 on the CBCT cross-sectional image (36 tooth EJS); C = D3 in the EJS of upper second molar (CBCT cross-sectional image); D = D4 in the EJS of 17 tooth on CBCT cross-sectional image.