A = Type I width (> 6 mm) of lower molar EJS on CBCT cross-sectional image at the level of 3 mm and 6 mm with no requirement of horizontal alveolar process augmentation prior endosseous dental implant treatment.
B = Type II width (> 4 to ≤ 6 mm) of lower right molar EJS on CBCT cross-sectional image. Endosseous dental implant treatment with simultaneous alveolar process horizontal augmentation are recommended.
C = Type III width of lower premolar EJS on CBCT cross-sectional image. Horizontal alveolar process augmentation and late implantation are recommended.